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Commit | Line | Data |
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7282bee7 CZ |
1 | /* |
2 | * | |
5fee325e | 3 | * arch/xtensa/platforms/iss/network.c |
7282bee7 CZ |
4 | * |
5 | * Platform specific initialization. | |
6 | * | |
7 | * Authors: Chris Zankel <chris@zankel.net> | |
8 | * Based on work form the UML team. | |
9 | * | |
10 | * Copyright 2005 Tensilica Inc. | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify it | |
13 | * under the terms of the GNU General Public License as published by the | |
14 | * Free Software Foundation; either version 2 of the License, or (at your | |
15 | * option) any later version. | |
16 | * | |
17 | */ | |
18 | ||
c130d3be MF |
19 | #define pr_fmt(fmt) "%s: " fmt, __func__ |
20 | ||
7282bee7 CZ |
21 | #include <linux/list.h> |
22 | #include <linux/irq.h> | |
23 | #include <linux/spinlock.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/timer.h> | |
26 | #include <linux/if_ether.h> | |
27 | #include <linux/inetdevice.h> | |
28 | #include <linux/init.h> | |
29 | #include <linux/if_tun.h> | |
30 | #include <linux/etherdevice.h> | |
31 | #include <linux/interrupt.h> | |
32 | #include <linux/ioctl.h> | |
57c8a661 | 33 | #include <linux/memblock.h> |
7282bee7 CZ |
34 | #include <linux/ethtool.h> |
35 | #include <linux/rtnetlink.h> | |
d052d1be | 36 | #include <linux/platform_device.h> |
7282bee7 | 37 | |
5fee325e | 38 | #include <platform/simcall.h> |
7282bee7 CZ |
39 | |
40 | #define DRIVER_NAME "iss-netdev" | |
41 | #define ETH_MAX_PACKET 1500 | |
42 | #define ETH_HEADER_OTHER 14 | |
306ab544 | 43 | #define ISS_NET_TIMER_VALUE (HZ / 10) |
7282bee7 CZ |
44 | |
45 | ||
46 | static DEFINE_SPINLOCK(opened_lock); | |
47 | static LIST_HEAD(opened); | |
48 | ||
49 | static DEFINE_SPINLOCK(devices_lock); | |
50 | static LIST_HEAD(devices); | |
51 | ||
52 | /* ------------------------------------------------------------------------- */ | |
53 | ||
54 | /* We currently only support the TUNTAP transport protocol. */ | |
55 | ||
56 | #define TRANSPORT_TUNTAP_NAME "tuntap" | |
57 | #define TRANSPORT_TUNTAP_MTU ETH_MAX_PACKET | |
58 | ||
59 | struct tuntap_info { | |
60 | char dev_name[IFNAMSIZ]; | |
7282bee7 CZ |
61 | int fd; |
62 | }; | |
63 | ||
64 | /* ------------------------------------------------------------------------- */ | |
65 | ||
66 | ||
67 | /* This structure contains out private information for the driver. */ | |
68 | ||
69 | struct iss_net_private { | |
7282bee7 CZ |
70 | struct list_head device_list; |
71 | struct list_head opened_list; | |
72 | ||
73 | spinlock_t lock; | |
74 | struct net_device *dev; | |
75 | struct platform_device pdev; | |
76 | struct timer_list tl; | |
77 | struct net_device_stats stats; | |
78 | ||
79 | struct timer_list timer; | |
80 | unsigned int timer_val; | |
81 | ||
82 | int index; | |
83 | int mtu; | |
84 | ||
7282bee7 CZ |
85 | struct { |
86 | union { | |
87 | struct tuntap_info tuntap; | |
88 | } info; | |
89 | ||
90 | int (*open)(struct iss_net_private *lp); | |
91 | void (*close)(struct iss_net_private *lp); | |
92 | int (*read)(struct iss_net_private *lp, struct sk_buff **skb); | |
93 | int (*write)(struct iss_net_private *lp, struct sk_buff **skb); | |
94 | unsigned short (*protocol)(struct sk_buff *skb); | |
95 | int (*poll)(struct iss_net_private *lp); | |
96 | } tp; | |
97 | ||
98 | }; | |
99 | ||
7282bee7 CZ |
100 | /* ================================ HELPERS ================================ */ |
101 | ||
102 | ||
103 | static char *split_if_spec(char *str, ...) | |
104 | { | |
105 | char **arg, *end; | |
106 | va_list ap; | |
107 | ||
108 | va_start(ap, str); | |
109 | while ((arg = va_arg(ap, char**)) != NULL) { | |
72ce6787 MF |
110 | if (*str == '\0') { |
111 | va_end(ap); | |
7282bee7 | 112 | return NULL; |
72ce6787 | 113 | } |
7282bee7 CZ |
114 | end = strchr(str, ','); |
115 | if (end != str) | |
116 | *arg = str; | |
72ce6787 MF |
117 | if (end == NULL) { |
118 | va_end(ap); | |
7282bee7 | 119 | return NULL; |
72ce6787 | 120 | } |
3f3cd60b | 121 | *end++ = '\0'; |
7282bee7 CZ |
122 | str = end; |
123 | } | |
124 | va_end(ap); | |
125 | return str; | |
126 | } | |
127 | ||
8991fd88 | 128 | /* Set Ethernet address of the specified device. */ |
7282bee7 | 129 | |
8991fd88 | 130 | static void setup_etheraddr(struct net_device *dev, char *str) |
7282bee7 | 131 | { |
8991fd88 | 132 | unsigned char *addr = dev->dev_addr; |
7282bee7 | 133 | |
8991fd88 MF |
134 | if (str == NULL) |
135 | goto random; | |
3f3cd60b | 136 | |
8991fd88 MF |
137 | if (!mac_pton(str, addr)) { |
138 | pr_err("%s: failed to parse '%s' as an ethernet address\n", | |
139 | dev->name, str); | |
140 | goto random; | |
7282bee7 | 141 | } |
8991fd88 MF |
142 | if (is_multicast_ether_addr(addr)) { |
143 | pr_err("%s: attempt to assign a multicast ethernet address\n", | |
144 | dev->name); | |
145 | goto random; | |
146 | } | |
147 | if (!is_valid_ether_addr(addr)) { | |
148 | pr_err("%s: attempt to assign an invalid ethernet address\n", | |
149 | dev->name); | |
150 | goto random; | |
151 | } | |
152 | if (!is_local_ether_addr(addr)) | |
153 | pr_warn("%s: assigning a globally valid ethernet address\n", | |
154 | dev->name); | |
155 | return; | |
156 | ||
157 | random: | |
158 | pr_info("%s: choosing a random ethernet address\n", | |
159 | dev->name); | |
160 | eth_hw_addr_random(dev); | |
7282bee7 CZ |
161 | } |
162 | ||
7282bee7 CZ |
163 | /* ======================= TUNTAP TRANSPORT INTERFACE ====================== */ |
164 | ||
165 | static int tuntap_open(struct iss_net_private *lp) | |
166 | { | |
167 | struct ifreq ifr; | |
168 | char *dev_name = lp->tp.info.tuntap.dev_name; | |
169 | int err = -EINVAL; | |
170 | int fd; | |
171 | ||
3f3cd60b MF |
172 | fd = simc_open("/dev/net/tun", 02, 0); /* O_RDWR */ |
173 | if (fd < 0) { | |
a6e16b9a MF |
174 | pr_err("%s: failed to open /dev/net/tun, returned %d (errno = %d)\n", |
175 | lp->dev->name, fd, errno); | |
7282bee7 CZ |
176 | return fd; |
177 | } | |
178 | ||
3f3cd60b | 179 | memset(&ifr, 0, sizeof(ifr)); |
7282bee7 | 180 | ifr.ifr_flags = IFF_TAP | IFF_NO_PI; |
3f3cd60b | 181 | strlcpy(ifr.ifr_name, dev_name, sizeof(ifr.ifr_name)); |
7282bee7 | 182 | |
3f3cd60b MF |
183 | err = simc_ioctl(fd, TUNSETIFF, &ifr); |
184 | if (err < 0) { | |
a6e16b9a MF |
185 | pr_err("%s: failed to set interface %s, returned %d (errno = %d)\n", |
186 | lp->dev->name, dev_name, err, errno); | |
7282bee7 CZ |
187 | simc_close(fd); |
188 | return err; | |
189 | } | |
190 | ||
191 | lp->tp.info.tuntap.fd = fd; | |
192 | return err; | |
193 | } | |
194 | ||
195 | static void tuntap_close(struct iss_net_private *lp) | |
196 | { | |
7282bee7 CZ |
197 | simc_close(lp->tp.info.tuntap.fd); |
198 | lp->tp.info.tuntap.fd = -1; | |
199 | } | |
200 | ||
3f3cd60b | 201 | static int tuntap_read(struct iss_net_private *lp, struct sk_buff **skb) |
7282bee7 | 202 | { |
7282bee7 CZ |
203 | return simc_read(lp->tp.info.tuntap.fd, |
204 | (*skb)->data, (*skb)->dev->mtu + ETH_HEADER_OTHER); | |
205 | } | |
206 | ||
3f3cd60b | 207 | static int tuntap_write(struct iss_net_private *lp, struct sk_buff **skb) |
7282bee7 CZ |
208 | { |
209 | return simc_write(lp->tp.info.tuntap.fd, (*skb)->data, (*skb)->len); | |
210 | } | |
211 | ||
212 | unsigned short tuntap_protocol(struct sk_buff *skb) | |
213 | { | |
214 | return eth_type_trans(skb, skb->dev); | |
215 | } | |
216 | ||
217 | static int tuntap_poll(struct iss_net_private *lp) | |
218 | { | |
219 | return simc_poll(lp->tp.info.tuntap.fd); | |
220 | } | |
221 | ||
222 | /* | |
35e14b44 | 223 | * ethX=tuntap,[mac address],device name |
7282bee7 CZ |
224 | */ |
225 | ||
226 | static int tuntap_probe(struct iss_net_private *lp, int index, char *init) | |
227 | { | |
8991fd88 | 228 | struct net_device *dev = lp->dev; |
7282bee7 CZ |
229 | char *dev_name = NULL, *mac_str = NULL, *rem = NULL; |
230 | ||
231 | /* Transport should be 'tuntap': ethX=tuntap,mac,dev_name */ | |
232 | ||
3f3cd60b MF |
233 | if (strncmp(init, TRANSPORT_TUNTAP_NAME, |
234 | sizeof(TRANSPORT_TUNTAP_NAME) - 1)) | |
7282bee7 CZ |
235 | return 0; |
236 | ||
3f3cd60b MF |
237 | init += sizeof(TRANSPORT_TUNTAP_NAME) - 1; |
238 | if (*init == ',') { | |
239 | rem = split_if_spec(init + 1, &mac_str, &dev_name); | |
240 | if (rem != NULL) { | |
a6e16b9a MF |
241 | pr_err("%s: extra garbage on specification : '%s'\n", |
242 | dev->name, rem); | |
7282bee7 CZ |
243 | return 0; |
244 | } | |
245 | } else if (*init != '\0') { | |
a6e16b9a MF |
246 | pr_err("%s: invalid argument: %s. Skipping device!\n", |
247 | dev->name, init); | |
7282bee7 CZ |
248 | return 0; |
249 | } | |
250 | ||
35e14b44 MF |
251 | if (!dev_name) { |
252 | pr_err("%s: missing tuntap device name\n", dev->name); | |
253 | return 0; | |
254 | } | |
255 | ||
256 | strlcpy(lp->tp.info.tuntap.dev_name, dev_name, | |
257 | sizeof(lp->tp.info.tuntap.dev_name)); | |
7282bee7 | 258 | |
8991fd88 | 259 | setup_etheraddr(dev, mac_str); |
7282bee7 | 260 | |
7282bee7 CZ |
261 | lp->mtu = TRANSPORT_TUNTAP_MTU; |
262 | ||
7282bee7 CZ |
263 | lp->tp.info.tuntap.fd = -1; |
264 | ||
265 | lp->tp.open = tuntap_open; | |
266 | lp->tp.close = tuntap_close; | |
267 | lp->tp.read = tuntap_read; | |
268 | lp->tp.write = tuntap_write; | |
269 | lp->tp.protocol = tuntap_protocol; | |
270 | lp->tp.poll = tuntap_poll; | |
271 | ||
7282bee7 CZ |
272 | return 1; |
273 | } | |
274 | ||
275 | /* ================================ ISS NET ================================ */ | |
276 | ||
277 | static int iss_net_rx(struct net_device *dev) | |
278 | { | |
6cbeba55 | 279 | struct iss_net_private *lp = netdev_priv(dev); |
7282bee7 CZ |
280 | int pkt_len; |
281 | struct sk_buff *skb; | |
282 | ||
283 | /* Check if there is any new data. */ | |
284 | ||
285 | if (lp->tp.poll(lp) == 0) | |
286 | return 0; | |
287 | ||
288 | /* Try to allocate memory, if it fails, try again next round. */ | |
289 | ||
3f3cd60b MF |
290 | skb = dev_alloc_skb(dev->mtu + 2 + ETH_HEADER_OTHER); |
291 | if (skb == NULL) { | |
7282bee7 CZ |
292 | lp->stats.rx_dropped++; |
293 | return 0; | |
294 | } | |
295 | ||
296 | skb_reserve(skb, 2); | |
297 | ||
298 | /* Setup skb */ | |
299 | ||
300 | skb->dev = dev; | |
459a98ed | 301 | skb_reset_mac_header(skb); |
7282bee7 CZ |
302 | pkt_len = lp->tp.read(lp, &skb); |
303 | skb_put(skb, pkt_len); | |
304 | ||
305 | if (pkt_len > 0) { | |
306 | skb_trim(skb, pkt_len); | |
307 | skb->protocol = lp->tp.protocol(skb); | |
7282bee7 CZ |
308 | |
309 | lp->stats.rx_bytes += skb->len; | |
310 | lp->stats.rx_packets++; | |
299f590f | 311 | netif_rx_ni(skb); |
7282bee7 CZ |
312 | return pkt_len; |
313 | } | |
314 | kfree_skb(skb); | |
315 | return pkt_len; | |
316 | } | |
317 | ||
318 | static int iss_net_poll(void) | |
319 | { | |
320 | struct list_head *ele; | |
321 | int err, ret = 0; | |
322 | ||
323 | spin_lock(&opened_lock); | |
324 | ||
325 | list_for_each(ele, &opened) { | |
326 | struct iss_net_private *lp; | |
327 | ||
328 | lp = list_entry(ele, struct iss_net_private, opened_list); | |
329 | ||
330 | if (!netif_running(lp->dev)) | |
331 | break; | |
332 | ||
333 | spin_lock(&lp->lock); | |
334 | ||
335 | while ((err = iss_net_rx(lp->dev)) > 0) | |
336 | ret++; | |
337 | ||
338 | spin_unlock(&lp->lock); | |
339 | ||
340 | if (err < 0) { | |
3f3cd60b MF |
341 | pr_err("Device '%s' read returned %d, shutting it down\n", |
342 | lp->dev->name, err); | |
7282bee7 CZ |
343 | dev_close(lp->dev); |
344 | } else { | |
3f3cd60b | 345 | /* FIXME reactivate_fd(lp->fd, ISS_ETH_IRQ); */ |
7282bee7 CZ |
346 | } |
347 | } | |
348 | ||
349 | spin_unlock(&opened_lock); | |
350 | return ret; | |
351 | } | |
352 | ||
353 | ||
d8479a21 | 354 | static void iss_net_timer(struct timer_list *t) |
7282bee7 | 355 | { |
d8479a21 | 356 | struct iss_net_private *lp = from_timer(lp, t, timer); |
7282bee7 | 357 | |
7282bee7 | 358 | iss_net_poll(); |
24e94454 | 359 | spin_lock(&lp->lock); |
7282bee7 | 360 | mod_timer(&lp->timer, jiffies + lp->timer_val); |
7282bee7 CZ |
361 | spin_unlock(&lp->lock); |
362 | } | |
363 | ||
364 | ||
365 | static int iss_net_open(struct net_device *dev) | |
366 | { | |
6cbeba55 | 367 | struct iss_net_private *lp = netdev_priv(dev); |
7282bee7 CZ |
368 | int err; |
369 | ||
24e94454 | 370 | spin_lock_bh(&lp->lock); |
7282bee7 | 371 | |
3f3cd60b MF |
372 | err = lp->tp.open(lp); |
373 | if (err < 0) | |
7282bee7 CZ |
374 | goto out; |
375 | ||
7282bee7 CZ |
376 | netif_start_queue(dev); |
377 | ||
378 | /* clear buffer - it can happen that the host side of the interface | |
4af410a8 | 379 | * is full when we get here. In this case, new data is never queued, |
7282bee7 CZ |
380 | * SIGIOs never arrive, and the net never works. |
381 | */ | |
382 | while ((err = iss_net_rx(dev)) > 0) | |
383 | ; | |
384 | ||
24e94454 MF |
385 | spin_unlock_bh(&lp->lock); |
386 | spin_lock_bh(&opened_lock); | |
7282bee7 | 387 | list_add(&lp->opened_list, &opened); |
24e94454 MF |
388 | spin_unlock_bh(&opened_lock); |
389 | spin_lock_bh(&lp->lock); | |
7282bee7 | 390 | |
d8479a21 | 391 | timer_setup(&lp->timer, iss_net_timer, 0); |
7282bee7 | 392 | lp->timer_val = ISS_NET_TIMER_VALUE; |
7282bee7 CZ |
393 | mod_timer(&lp->timer, jiffies + lp->timer_val); |
394 | ||
395 | out: | |
24e94454 | 396 | spin_unlock_bh(&lp->lock); |
7282bee7 CZ |
397 | return err; |
398 | } | |
399 | ||
400 | static int iss_net_close(struct net_device *dev) | |
401 | { | |
6cbeba55 | 402 | struct iss_net_private *lp = netdev_priv(dev); |
7282bee7 | 403 | netif_stop_queue(dev); |
24e94454 | 404 | spin_lock_bh(&lp->lock); |
7282bee7 CZ |
405 | |
406 | spin_lock(&opened_lock); | |
407 | list_del(&opened); | |
408 | spin_unlock(&opened_lock); | |
409 | ||
410 | del_timer_sync(&lp->timer); | |
411 | ||
412 | lp->tp.close(lp); | |
413 | ||
24e94454 | 414 | spin_unlock_bh(&lp->lock); |
7282bee7 CZ |
415 | return 0; |
416 | } | |
417 | ||
418 | static int iss_net_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
419 | { | |
6cbeba55 | 420 | struct iss_net_private *lp = netdev_priv(dev); |
7282bee7 CZ |
421 | int len; |
422 | ||
423 | netif_stop_queue(dev); | |
24e94454 | 424 | spin_lock_bh(&lp->lock); |
7282bee7 CZ |
425 | |
426 | len = lp->tp.write(lp, &skb); | |
427 | ||
428 | if (len == skb->len) { | |
429 | lp->stats.tx_packets++; | |
430 | lp->stats.tx_bytes += skb->len; | |
860e9538 | 431 | netif_trans_update(dev); |
7282bee7 CZ |
432 | netif_start_queue(dev); |
433 | ||
434 | /* this is normally done in the interrupt when tx finishes */ | |
435 | netif_wake_queue(dev); | |
436 | ||
437 | } else if (len == 0) { | |
438 | netif_start_queue(dev); | |
439 | lp->stats.tx_dropped++; | |
440 | ||
441 | } else { | |
442 | netif_start_queue(dev); | |
a6e16b9a | 443 | pr_err("%s: %s failed(%d)\n", dev->name, __func__, len); |
7282bee7 CZ |
444 | } |
445 | ||
24e94454 | 446 | spin_unlock_bh(&lp->lock); |
7282bee7 CZ |
447 | |
448 | dev_kfree_skb(skb); | |
ec634fe3 | 449 | return NETDEV_TX_OK; |
7282bee7 CZ |
450 | } |
451 | ||
452 | ||
453 | static struct net_device_stats *iss_net_get_stats(struct net_device *dev) | |
454 | { | |
6cbeba55 | 455 | struct iss_net_private *lp = netdev_priv(dev); |
7282bee7 CZ |
456 | return &lp->stats; |
457 | } | |
458 | ||
459 | static void iss_net_set_multicast_list(struct net_device *dev) | |
460 | { | |
7282bee7 CZ |
461 | } |
462 | ||
463 | static void iss_net_tx_timeout(struct net_device *dev) | |
464 | { | |
7282bee7 CZ |
465 | } |
466 | ||
467 | static int iss_net_set_mac(struct net_device *dev, void *addr) | |
468 | { | |
6cbeba55 | 469 | struct iss_net_private *lp = netdev_priv(dev); |
7282bee7 CZ |
470 | struct sockaddr *hwaddr = addr; |
471 | ||
f6ac5a17 MF |
472 | if (!is_valid_ether_addr(hwaddr->sa_data)) |
473 | return -EADDRNOTAVAIL; | |
24e94454 | 474 | spin_lock_bh(&lp->lock); |
7282bee7 | 475 | memcpy(dev->dev_addr, hwaddr->sa_data, ETH_ALEN); |
24e94454 | 476 | spin_unlock_bh(&lp->lock); |
7282bee7 CZ |
477 | return 0; |
478 | } | |
479 | ||
480 | static int iss_net_change_mtu(struct net_device *dev, int new_mtu) | |
481 | { | |
7282bee7 CZ |
482 | return -EINVAL; |
483 | } | |
484 | ||
d8479a21 | 485 | void iss_net_user_timer_expire(struct timer_list *unused) |
7282bee7 CZ |
486 | { |
487 | } | |
488 | ||
489 | ||
3ae5eaec RK |
490 | static struct platform_driver iss_net_driver = { |
491 | .driver = { | |
492 | .name = DRIVER_NAME, | |
493 | }, | |
7282bee7 CZ |
494 | }; |
495 | ||
496 | static int driver_registered; | |
497 | ||
0a972468 CZ |
498 | static const struct net_device_ops iss_netdev_ops = { |
499 | .ndo_open = iss_net_open, | |
500 | .ndo_stop = iss_net_close, | |
501 | .ndo_get_stats = iss_net_get_stats, | |
502 | .ndo_start_xmit = iss_net_start_xmit, | |
503 | .ndo_validate_addr = eth_validate_addr, | |
504 | .ndo_change_mtu = iss_net_change_mtu, | |
505 | .ndo_set_mac_address = iss_net_set_mac, | |
0a972468 | 506 | .ndo_tx_timeout = iss_net_tx_timeout, |
afc4b13d | 507 | .ndo_set_rx_mode = iss_net_set_multicast_list, |
0a972468 CZ |
508 | }; |
509 | ||
7282bee7 CZ |
510 | static int iss_net_configure(int index, char *init) |
511 | { | |
512 | struct net_device *dev; | |
513 | struct iss_net_private *lp; | |
514 | int err; | |
515 | ||
3f3cd60b MF |
516 | dev = alloc_etherdev(sizeof(*lp)); |
517 | if (dev == NULL) { | |
518 | pr_err("eth_configure: failed to allocate device\n"); | |
7282bee7 CZ |
519 | return 1; |
520 | } | |
521 | ||
522 | /* Initialize private element. */ | |
523 | ||
6cbeba55 | 524 | lp = netdev_priv(dev); |
3f3cd60b | 525 | *lp = (struct iss_net_private) { |
7282bee7 CZ |
526 | .device_list = LIST_HEAD_INIT(lp->device_list), |
527 | .opened_list = LIST_HEAD_INIT(lp->opened_list), | |
7282bee7 CZ |
528 | .dev = dev, |
529 | .index = index, | |
24e94454 | 530 | }; |
7282bee7 | 531 | |
24e94454 | 532 | spin_lock_init(&lp->lock); |
358b1810 MF |
533 | /* |
534 | * If this name ends up conflicting with an existing registered | |
535 | * netdevice, that is OK, register_netdev{,ice}() will notice this | |
536 | * and fail. | |
537 | */ | |
538 | snprintf(dev->name, sizeof(dev->name), "eth%d", index); | |
539 | ||
7282bee7 CZ |
540 | /* |
541 | * Try all transport protocols. | |
542 | * Note: more protocols can be added by adding '&& !X_init(lp, eth)'. | |
543 | */ | |
544 | ||
545 | if (!tuntap_probe(lp, index, init)) { | |
a6e16b9a MF |
546 | pr_err("%s: invalid arguments. Skipping device!\n", |
547 | dev->name); | |
7282bee7 CZ |
548 | goto errout; |
549 | } | |
550 | ||
8991fd88 | 551 | pr_info("Netdevice %d (%pM)\n", index, dev->dev_addr); |
7282bee7 CZ |
552 | |
553 | /* sysfs register */ | |
554 | ||
555 | if (!driver_registered) { | |
3ae5eaec | 556 | platform_driver_register(&iss_net_driver); |
7282bee7 CZ |
557 | driver_registered = 1; |
558 | } | |
559 | ||
560 | spin_lock(&devices_lock); | |
561 | list_add(&lp->device_list, &devices); | |
562 | spin_unlock(&devices_lock); | |
563 | ||
564 | lp->pdev.id = index; | |
565 | lp->pdev.name = DRIVER_NAME; | |
566 | platform_device_register(&lp->pdev); | |
3f3cd60b | 567 | SET_NETDEV_DEV(dev, &lp->pdev.dev); |
7282bee7 | 568 | |
0a972468 | 569 | dev->netdev_ops = &iss_netdev_ops; |
7282bee7 | 570 | dev->mtu = lp->mtu; |
7282bee7 CZ |
571 | dev->watchdog_timeo = (HZ >> 1); |
572 | dev->irq = -1; | |
573 | ||
574 | rtnl_lock(); | |
575 | err = register_netdevice(dev); | |
576 | rtnl_unlock(); | |
577 | ||
578 | if (err) { | |
a6e16b9a | 579 | pr_err("%s: error registering net device!\n", dev->name); |
7282bee7 CZ |
580 | /* XXX: should we call ->remove() here? */ |
581 | free_netdev(dev); | |
582 | return 1; | |
583 | } | |
584 | ||
d8479a21 | 585 | timer_setup(&lp->tl, iss_net_user_timer_expire, 0); |
7282bee7 | 586 | |
7282bee7 CZ |
587 | return 0; |
588 | ||
589 | errout: | |
3f3cd60b | 590 | /* FIXME: unregister; free, etc.. */ |
7282bee7 | 591 | return -EIO; |
7282bee7 CZ |
592 | } |
593 | ||
594 | /* ------------------------------------------------------------------------- */ | |
595 | ||
596 | /* Filled in during early boot */ | |
597 | ||
598 | struct list_head eth_cmd_line = LIST_HEAD_INIT(eth_cmd_line); | |
599 | ||
600 | struct iss_net_init { | |
601 | struct list_head list; | |
602 | char *init; /* init string */ | |
603 | int index; | |
604 | }; | |
605 | ||
606 | /* | |
607 | * Parse the command line and look for 'ethX=...' fields, and register all | |
608 | * those fields. They will be later initialized in iss_net_init. | |
609 | */ | |
610 | ||
dc2bffa7 | 611 | static int __init iss_net_setup(char *str) |
7282bee7 CZ |
612 | { |
613 | struct iss_net_private *device = NULL; | |
614 | struct iss_net_init *new; | |
615 | struct list_head *ele; | |
616 | char *end; | |
8be54d77 MF |
617 | int rc; |
618 | unsigned n; | |
7282bee7 | 619 | |
8be54d77 MF |
620 | end = strchr(str, '='); |
621 | if (!end) { | |
c130d3be | 622 | pr_err("Expected '=' after device number\n"); |
7282bee7 CZ |
623 | return 1; |
624 | } | |
8be54d77 MF |
625 | *end = 0; |
626 | rc = kstrtouint(str, 0, &n); | |
627 | *end = '='; | |
628 | if (rc < 0) { | |
c130d3be | 629 | pr_err("Failed to parse '%s'\n", str); |
7282bee7 CZ |
630 | return 1; |
631 | } | |
3f3cd60b | 632 | str = end; |
7282bee7 CZ |
633 | |
634 | spin_lock(&devices_lock); | |
635 | ||
636 | list_for_each(ele, &devices) { | |
637 | device = list_entry(ele, struct iss_net_private, device_list); | |
638 | if (device->index == n) | |
639 | break; | |
640 | } | |
641 | ||
642 | spin_unlock(&devices_lock); | |
643 | ||
644 | if (device && device->index == n) { | |
c130d3be | 645 | pr_err("Device %u already configured\n", n); |
7282bee7 CZ |
646 | return 1; |
647 | } | |
648 | ||
2a5bda5a | 649 | new = memblock_alloc(sizeof(*new), 0); |
f447fd30 | 650 | if (new == NULL) { |
c130d3be | 651 | pr_err("Alloc_bootmem failed\n"); |
7282bee7 CZ |
652 | return 1; |
653 | } | |
654 | ||
655 | INIT_LIST_HEAD(&new->list); | |
656 | new->index = n; | |
657 | new->init = str + 1; | |
658 | ||
659 | list_add_tail(&new->list, ð_cmd_line); | |
660 | return 1; | |
661 | } | |
662 | ||
8c8ad85f | 663 | __setup("eth", iss_net_setup); |
7282bee7 CZ |
664 | |
665 | /* | |
666 | * Initialize all ISS Ethernet devices previously registered in iss_net_setup. | |
667 | */ | |
668 | ||
669 | static int iss_net_init(void) | |
670 | { | |
671 | struct list_head *ele, *next; | |
672 | ||
673 | /* Walk through all Ethernet devices specified in the command line. */ | |
674 | ||
675 | list_for_each_safe(ele, next, ð_cmd_line) { | |
676 | struct iss_net_init *eth; | |
677 | eth = list_entry(ele, struct iss_net_init, list); | |
678 | iss_net_configure(eth->index, eth->init); | |
679 | } | |
680 | ||
681 | return 1; | |
682 | } | |
30e3c642 | 683 | device_initcall(iss_net_init); |