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7282bee7 CZ |
1 | /* |
2 | * | |
3 | * arch/xtensa/platform-iss/network.c | |
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 | ||
19 | #include <linux/config.h> | |
20 | #include <linux/list.h> | |
21 | #include <linux/irq.h> | |
22 | #include <linux/spinlock.h> | |
23 | #include <linux/slab.h> | |
24 | #include <linux/timer.h> | |
25 | #include <linux/if_ether.h> | |
26 | #include <linux/inetdevice.h> | |
27 | #include <linux/init.h> | |
28 | #include <linux/if_tun.h> | |
29 | #include <linux/etherdevice.h> | |
30 | #include <linux/interrupt.h> | |
31 | #include <linux/ioctl.h> | |
32 | #include <linux/bootmem.h> | |
33 | #include <linux/ethtool.h> | |
34 | #include <linux/rtnetlink.h> | |
35 | #include <linux/timer.h> | |
d052d1be | 36 | #include <linux/platform_device.h> |
7282bee7 CZ |
37 | |
38 | #include <xtensa/simcall.h> | |
39 | ||
40 | #define DRIVER_NAME "iss-netdev" | |
41 | #define ETH_MAX_PACKET 1500 | |
42 | #define ETH_HEADER_OTHER 14 | |
43 | #define ISS_NET_TIMER_VALUE (2 * HZ) | |
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]; | |
61 | int fixed_config; | |
62 | unsigned char gw[ETH_ALEN]; | |
63 | int fd; | |
64 | }; | |
65 | ||
66 | /* ------------------------------------------------------------------------- */ | |
67 | ||
68 | ||
69 | /* This structure contains out private information for the driver. */ | |
70 | ||
71 | struct iss_net_private { | |
72 | ||
73 | struct list_head device_list; | |
74 | struct list_head opened_list; | |
75 | ||
76 | spinlock_t lock; | |
77 | struct net_device *dev; | |
78 | struct platform_device pdev; | |
79 | struct timer_list tl; | |
80 | struct net_device_stats stats; | |
81 | ||
82 | struct timer_list timer; | |
83 | unsigned int timer_val; | |
84 | ||
85 | int index; | |
86 | int mtu; | |
87 | ||
88 | unsigned char mac[ETH_ALEN]; | |
89 | int have_mac; | |
90 | ||
91 | struct { | |
92 | union { | |
93 | struct tuntap_info tuntap; | |
94 | } info; | |
95 | ||
96 | int (*open)(struct iss_net_private *lp); | |
97 | void (*close)(struct iss_net_private *lp); | |
98 | int (*read)(struct iss_net_private *lp, struct sk_buff **skb); | |
99 | int (*write)(struct iss_net_private *lp, struct sk_buff **skb); | |
100 | unsigned short (*protocol)(struct sk_buff *skb); | |
101 | int (*poll)(struct iss_net_private *lp); | |
102 | } tp; | |
103 | ||
104 | }; | |
105 | ||
106 | /* ======================= ISS SIMCALL INTERFACE =========================== */ | |
107 | ||
108 | /* Note: __simc must _not_ be declared inline! */ | |
109 | ||
110 | static int errno; | |
111 | ||
112 | static int __simc (int a, int b, int c, int d, int e, int f) | |
113 | { | |
114 | int ret; | |
115 | __asm__ __volatile__ ("simcall\n" | |
116 | "mov %0, a2\n" | |
117 | "mov %1, a3\n" : "=a" (ret), "=a" (errno) | |
118 | : : "a2", "a3"); | |
119 | return ret; | |
120 | } | |
121 | ||
122 | static int inline simc_open(char *file, int flags, int mode) | |
123 | { | |
124 | return __simc(SYS_open, (int) file, flags, mode, 0, 0); | |
125 | } | |
126 | ||
127 | static int inline simc_close(int fd) | |
128 | { | |
129 | return __simc(SYS_close, fd, 0, 0, 0, 0); | |
130 | } | |
131 | ||
132 | static int inline simc_ioctl(int fd, int request, void *arg) | |
133 | { | |
134 | return __simc(SYS_ioctl, fd, request, (int) arg, 0, 0); | |
135 | } | |
136 | ||
137 | static int inline simc_read(int fd, void *buf, size_t count) | |
138 | { | |
139 | return __simc(SYS_read, fd, (int) buf, count, 0, 0); | |
140 | } | |
141 | ||
142 | static int inline simc_write(int fd, void *buf, size_t count) | |
143 | { | |
144 | return __simc(SYS_write, fd, (int) buf, count, 0, 0); | |
145 | } | |
146 | ||
147 | static int inline simc_poll(int fd) | |
148 | { | |
149 | struct timeval tv = { .tv_sec = 0, .tv_usec = 0 }; | |
150 | ||
151 | return __simc(SYS_select_one, fd, XTISS_SELECT_ONE_READ, (int)&tv,0,0); | |
152 | } | |
153 | ||
154 | /* ================================ HELPERS ================================ */ | |
155 | ||
156 | ||
157 | static char *split_if_spec(char *str, ...) | |
158 | { | |
159 | char **arg, *end; | |
160 | va_list ap; | |
161 | ||
162 | va_start(ap, str); | |
163 | while ((arg = va_arg(ap, char**)) != NULL) { | |
164 | if (*str == '\0') | |
165 | return NULL; | |
166 | end = strchr(str, ','); | |
167 | if (end != str) | |
168 | *arg = str; | |
169 | if (end == NULL) | |
170 | return NULL; | |
171 | *end ++ = '\0'; | |
172 | str = end; | |
173 | } | |
174 | va_end(ap); | |
175 | return str; | |
176 | } | |
177 | ||
178 | ||
179 | #if 0 | |
180 | /* Adjust SKB. */ | |
181 | ||
182 | struct sk_buff *ether_adjust_skb(struct sk_buff *skb, int extra) | |
183 | { | |
184 | if ((skb != NULL) && (skb_tailroom(skb) < extra)) { | |
185 | struct sk_buff *skb2; | |
186 | ||
187 | skb2 = skb_copy_expand(skb, 0, extra, GFP_ATOMIC); | |
188 | dev_kfree_skb(skb); | |
189 | skb = skb2; | |
190 | } | |
191 | if (skb != NULL) | |
192 | skb_put(skb, extra); | |
193 | ||
194 | return skb; | |
195 | } | |
196 | #endif | |
197 | ||
198 | /* Return the IP address as a string for a given device. */ | |
199 | ||
200 | static void dev_ip_addr(void *d, char *buf, char *bin_buf) | |
201 | { | |
202 | struct net_device *dev = d; | |
203 | struct in_device *ip = dev->ip_ptr; | |
204 | struct in_ifaddr *in; | |
205 | u32 addr; | |
206 | ||
207 | if ((ip == NULL) || ((in = ip->ifa_list) == NULL)) { | |
208 | printk(KERN_WARNING "Device not assigned an IP address!\n"); | |
209 | return; | |
210 | } | |
211 | ||
212 | addr = in->ifa_address; | |
213 | sprintf(buf, "%d.%d.%d.%d", addr & 0xff, (addr >> 8) & 0xff, | |
214 | (addr >> 16) & 0xff, addr >> 24); | |
215 | ||
216 | if (bin_buf) { | |
217 | bin_buf[0] = addr & 0xff; | |
218 | bin_buf[1] = (addr >> 8) & 0xff; | |
219 | bin_buf[2] = (addr >> 16) & 0xff; | |
220 | bin_buf[3] = addr >> 24; | |
221 | } | |
222 | } | |
223 | ||
224 | /* Set Ethernet address of the specified device. */ | |
225 | ||
226 | static void inline set_ether_mac(void *d, unsigned char *addr) | |
227 | { | |
228 | struct net_device *dev = d; | |
229 | memcpy(dev->dev_addr, addr, ETH_ALEN); | |
230 | } | |
231 | ||
232 | ||
233 | /* ======================= TUNTAP TRANSPORT INTERFACE ====================== */ | |
234 | ||
235 | static int tuntap_open(struct iss_net_private *lp) | |
236 | { | |
237 | struct ifreq ifr; | |
238 | char *dev_name = lp->tp.info.tuntap.dev_name; | |
239 | int err = -EINVAL; | |
240 | int fd; | |
241 | ||
242 | /* We currently only support a fixed configuration. */ | |
243 | ||
244 | if (!lp->tp.info.tuntap.fixed_config) | |
245 | return -EINVAL; | |
246 | ||
247 | if ((fd = simc_open("/dev/net/tun", 02, 0)) < 0) { /* O_RDWR */ | |
248 | printk("Failed to open /dev/net/tun, returned %d " | |
249 | "(errno = %d)\n", fd, errno); | |
250 | return fd; | |
251 | } | |
252 | ||
253 | memset(&ifr, 0, sizeof ifr); | |
254 | ifr.ifr_flags = IFF_TAP | IFF_NO_PI; | |
255 | strlcpy(ifr.ifr_name, dev_name, sizeof ifr.ifr_name - 1); | |
256 | ||
257 | if ((err = simc_ioctl(fd, TUNSETIFF, (void*) &ifr)) < 0) { | |
258 | printk("Failed to set interface, returned %d " | |
259 | "(errno = %d)\n", err, errno); | |
260 | simc_close(fd); | |
261 | return err; | |
262 | } | |
263 | ||
264 | lp->tp.info.tuntap.fd = fd; | |
265 | return err; | |
266 | } | |
267 | ||
268 | static void tuntap_close(struct iss_net_private *lp) | |
269 | { | |
270 | #if 0 | |
271 | if (lp->tp.info.tuntap.fixed_config) | |
272 | iter_addresses(lp->tp.info.tuntap.dev, close_addr, lp->host.dev_name); | |
273 | #endif | |
274 | simc_close(lp->tp.info.tuntap.fd); | |
275 | lp->tp.info.tuntap.fd = -1; | |
276 | } | |
277 | ||
278 | static int tuntap_read (struct iss_net_private *lp, struct sk_buff **skb) | |
279 | { | |
280 | #if 0 | |
281 | *skb = ether_adjust_skb(*skb, ETH_HEADER_OTHER); | |
282 | if (*skb == NULL) | |
283 | return -ENOMEM; | |
284 | #endif | |
285 | ||
286 | return simc_read(lp->tp.info.tuntap.fd, | |
287 | (*skb)->data, (*skb)->dev->mtu + ETH_HEADER_OTHER); | |
288 | } | |
289 | ||
290 | static int tuntap_write (struct iss_net_private *lp, struct sk_buff **skb) | |
291 | { | |
292 | return simc_write(lp->tp.info.tuntap.fd, (*skb)->data, (*skb)->len); | |
293 | } | |
294 | ||
295 | unsigned short tuntap_protocol(struct sk_buff *skb) | |
296 | { | |
297 | return eth_type_trans(skb, skb->dev); | |
298 | } | |
299 | ||
300 | static int tuntap_poll(struct iss_net_private *lp) | |
301 | { | |
302 | return simc_poll(lp->tp.info.tuntap.fd); | |
303 | } | |
304 | ||
305 | /* | |
306 | * Currently only a device name is supported. | |
307 | * ethX=tuntap[,[mac address][,[device name]]] | |
308 | */ | |
309 | ||
310 | static int tuntap_probe(struct iss_net_private *lp, int index, char *init) | |
311 | { | |
312 | const int len = strlen(TRANSPORT_TUNTAP_NAME); | |
313 | char *dev_name = NULL, *mac_str = NULL, *rem = NULL; | |
314 | ||
315 | /* Transport should be 'tuntap': ethX=tuntap,mac,dev_name */ | |
316 | ||
317 | if (strncmp(init, TRANSPORT_TUNTAP_NAME, len)) | |
318 | return 0; | |
319 | ||
320 | if (*(init += strlen(TRANSPORT_TUNTAP_NAME)) == ',') { | |
321 | if ((rem=split_if_spec(init+1, &mac_str, &dev_name)) != NULL) { | |
322 | printk("Extra garbage on specification : '%s'\n", rem); | |
323 | return 0; | |
324 | } | |
325 | } else if (*init != '\0') { | |
326 | printk("Invalid argument: %s. Skipping device!\n", init); | |
327 | return 0; | |
328 | } | |
329 | ||
330 | if (dev_name) { | |
331 | strncpy(lp->tp.info.tuntap.dev_name, dev_name, | |
332 | sizeof lp->tp.info.tuntap.dev_name); | |
333 | lp->tp.info.tuntap.fixed_config = 1; | |
334 | } else | |
335 | strcpy(lp->tp.info.tuntap.dev_name, TRANSPORT_TUNTAP_NAME); | |
336 | ||
337 | ||
338 | #if 0 | |
339 | if (setup_etheraddr(mac_str, lp->mac)) | |
340 | lp->have_mac = 1; | |
341 | #endif | |
342 | lp->mtu = TRANSPORT_TUNTAP_MTU; | |
343 | ||
344 | //lp->info.tuntap.gate_addr = gate_addr; | |
345 | ||
346 | lp->tp.info.tuntap.fd = -1; | |
347 | ||
348 | lp->tp.open = tuntap_open; | |
349 | lp->tp.close = tuntap_close; | |
350 | lp->tp.read = tuntap_read; | |
351 | lp->tp.write = tuntap_write; | |
352 | lp->tp.protocol = tuntap_protocol; | |
353 | lp->tp.poll = tuntap_poll; | |
354 | ||
355 | printk("TUN/TAP backend - "); | |
356 | #if 0 | |
357 | if (lp->host.gate_addr != NULL) | |
358 | printk("IP = %s", lp->host.gate_addr); | |
359 | #endif | |
360 | printk("\n"); | |
361 | ||
362 | return 1; | |
363 | } | |
364 | ||
365 | /* ================================ ISS NET ================================ */ | |
366 | ||
367 | static int iss_net_rx(struct net_device *dev) | |
368 | { | |
369 | struct iss_net_private *lp = dev->priv; | |
370 | int pkt_len; | |
371 | struct sk_buff *skb; | |
372 | ||
373 | /* Check if there is any new data. */ | |
374 | ||
375 | if (lp->tp.poll(lp) == 0) | |
376 | return 0; | |
377 | ||
378 | /* Try to allocate memory, if it fails, try again next round. */ | |
379 | ||
380 | if ((skb = dev_alloc_skb(dev->mtu + 2 + ETH_HEADER_OTHER)) == NULL) { | |
381 | lp->stats.rx_dropped++; | |
382 | return 0; | |
383 | } | |
384 | ||
385 | skb_reserve(skb, 2); | |
386 | ||
387 | /* Setup skb */ | |
388 | ||
389 | skb->dev = dev; | |
390 | skb->mac.raw = skb->data; | |
391 | pkt_len = lp->tp.read(lp, &skb); | |
392 | skb_put(skb, pkt_len); | |
393 | ||
394 | if (pkt_len > 0) { | |
395 | skb_trim(skb, pkt_len); | |
396 | skb->protocol = lp->tp.protocol(skb); | |
397 | // netif_rx(skb); | |
398 | netif_rx_ni(skb); | |
399 | ||
400 | lp->stats.rx_bytes += skb->len; | |
401 | lp->stats.rx_packets++; | |
402 | return pkt_len; | |
403 | } | |
404 | kfree_skb(skb); | |
405 | return pkt_len; | |
406 | } | |
407 | ||
408 | static int iss_net_poll(void) | |
409 | { | |
410 | struct list_head *ele; | |
411 | int err, ret = 0; | |
412 | ||
413 | spin_lock(&opened_lock); | |
414 | ||
415 | list_for_each(ele, &opened) { | |
416 | struct iss_net_private *lp; | |
417 | ||
418 | lp = list_entry(ele, struct iss_net_private, opened_list); | |
419 | ||
420 | if (!netif_running(lp->dev)) | |
421 | break; | |
422 | ||
423 | spin_lock(&lp->lock); | |
424 | ||
425 | while ((err = iss_net_rx(lp->dev)) > 0) | |
426 | ret++; | |
427 | ||
428 | spin_unlock(&lp->lock); | |
429 | ||
430 | if (err < 0) { | |
431 | printk(KERN_ERR "Device '%s' read returned %d, " | |
432 | "shutting it down\n", lp->dev->name, err); | |
433 | dev_close(lp->dev); | |
434 | } else { | |
435 | // FIXME reactivate_fd(lp->fd, ISS_ETH_IRQ); | |
436 | } | |
437 | } | |
438 | ||
439 | spin_unlock(&opened_lock); | |
440 | return ret; | |
441 | } | |
442 | ||
443 | ||
444 | static void iss_net_timer(unsigned long priv) | |
445 | { | |
446 | struct iss_net_private* lp = (struct iss_net_private*) priv; | |
447 | ||
448 | spin_lock(&lp->lock); | |
449 | ||
450 | iss_net_poll(); | |
451 | ||
452 | mod_timer(&lp->timer, jiffies + lp->timer_val); | |
453 | ||
454 | spin_unlock(&lp->lock); | |
455 | } | |
456 | ||
457 | ||
458 | static int iss_net_open(struct net_device *dev) | |
459 | { | |
460 | struct iss_net_private *lp = dev->priv; | |
461 | char addr[sizeof "255.255.255.255\0"]; | |
462 | int err; | |
463 | ||
464 | spin_lock(&lp->lock); | |
465 | ||
466 | if ((err = lp->tp.open(lp)) < 0) | |
467 | goto out; | |
468 | ||
469 | if (!lp->have_mac) { | |
470 | dev_ip_addr(dev, addr, &lp->mac[2]); | |
471 | set_ether_mac(dev, lp->mac); | |
472 | } | |
473 | ||
474 | netif_start_queue(dev); | |
475 | ||
476 | /* clear buffer - it can happen that the host side of the interface | |
477 | * is full when we gethere. In this case, new data is never queued, | |
478 | * SIGIOs never arrive, and the net never works. | |
479 | */ | |
480 | while ((err = iss_net_rx(dev)) > 0) | |
481 | ; | |
482 | ||
483 | spin_lock(&opened_lock); | |
484 | list_add(&lp->opened_list, &opened); | |
485 | spin_unlock(&opened_lock); | |
486 | ||
487 | init_timer(&lp->timer); | |
488 | lp->timer_val = ISS_NET_TIMER_VALUE; | |
489 | lp->timer.data = (unsigned long) lp; | |
490 | lp->timer.function = iss_net_timer; | |
491 | mod_timer(&lp->timer, jiffies + lp->timer_val); | |
492 | ||
493 | out: | |
494 | spin_unlock(&lp->lock); | |
495 | return err; | |
496 | } | |
497 | ||
498 | static int iss_net_close(struct net_device *dev) | |
499 | { | |
500 | struct iss_net_private *lp = dev->priv; | |
501 | printk("iss_net_close!\n"); | |
502 | netif_stop_queue(dev); | |
503 | spin_lock(&lp->lock); | |
504 | ||
505 | spin_lock(&opened_lock); | |
506 | list_del(&opened); | |
507 | spin_unlock(&opened_lock); | |
508 | ||
509 | del_timer_sync(&lp->timer); | |
510 | ||
511 | lp->tp.close(lp); | |
512 | ||
513 | spin_unlock(&lp->lock); | |
514 | return 0; | |
515 | } | |
516 | ||
517 | static int iss_net_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
518 | { | |
519 | struct iss_net_private *lp = dev->priv; | |
520 | unsigned long flags; | |
521 | int len; | |
522 | ||
523 | netif_stop_queue(dev); | |
524 | spin_lock_irqsave(&lp->lock, flags); | |
525 | ||
526 | len = lp->tp.write(lp, &skb); | |
527 | ||
528 | if (len == skb->len) { | |
529 | lp->stats.tx_packets++; | |
530 | lp->stats.tx_bytes += skb->len; | |
531 | dev->trans_start = jiffies; | |
532 | netif_start_queue(dev); | |
533 | ||
534 | /* this is normally done in the interrupt when tx finishes */ | |
535 | netif_wake_queue(dev); | |
536 | ||
537 | } else if (len == 0) { | |
538 | netif_start_queue(dev); | |
539 | lp->stats.tx_dropped++; | |
540 | ||
541 | } else { | |
542 | netif_start_queue(dev); | |
543 | printk(KERN_ERR "iss_net_start_xmit: failed(%d)\n", len); | |
544 | } | |
545 | ||
546 | spin_unlock_irqrestore(&lp->lock, flags); | |
547 | ||
548 | dev_kfree_skb(skb); | |
549 | return 0; | |
550 | } | |
551 | ||
552 | ||
553 | static struct net_device_stats *iss_net_get_stats(struct net_device *dev) | |
554 | { | |
555 | struct iss_net_private *lp = dev->priv; | |
556 | return &lp->stats; | |
557 | } | |
558 | ||
559 | static void iss_net_set_multicast_list(struct net_device *dev) | |
560 | { | |
561 | #if 0 | |
562 | if (dev->flags & IFF_PROMISC) | |
563 | return; | |
564 | else if (dev->mc_count) | |
565 | dev->flags |= IFF_ALLMULTI; | |
566 | else | |
567 | dev->flags &= ~IFF_ALLMULTI; | |
568 | #endif | |
569 | } | |
570 | ||
571 | static void iss_net_tx_timeout(struct net_device *dev) | |
572 | { | |
573 | #if 0 | |
574 | dev->trans_start = jiffies; | |
575 | netif_wake_queue(dev); | |
576 | #endif | |
577 | } | |
578 | ||
579 | static int iss_net_set_mac(struct net_device *dev, void *addr) | |
580 | { | |
581 | #if 0 | |
582 | struct iss_net_private *lp = dev->priv; | |
583 | struct sockaddr *hwaddr = addr; | |
584 | ||
585 | spin_lock(&lp->lock); | |
586 | memcpy(dev->dev_addr, hwaddr->sa_data, ETH_ALEN); | |
587 | spin_unlock(&lp->lock); | |
588 | #endif | |
589 | ||
590 | return 0; | |
591 | } | |
592 | ||
593 | static int iss_net_change_mtu(struct net_device *dev, int new_mtu) | |
594 | { | |
595 | #if 0 | |
596 | struct iss_net_private *lp = dev->priv; | |
597 | int err = 0; | |
598 | ||
599 | spin_lock(&lp->lock); | |
600 | ||
601 | // FIXME not needed new_mtu = transport_set_mtu(new_mtu, &lp->user); | |
602 | ||
603 | if (new_mtu < 0) | |
604 | err = new_mtu; | |
605 | else | |
606 | dev->mtu = new_mtu; | |
607 | ||
608 | spin_unlock(&lp->lock); | |
609 | return err; | |
610 | #endif | |
611 | return -EINVAL; | |
612 | } | |
613 | ||
614 | static int iss_net_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
615 | { | |
616 | #if 0 | |
617 | static const struct ethtool_drvinfo info = { | |
618 | .cmd = ETHTOOL_GDRVINFO, | |
619 | .driver = DRIVER_NAME, | |
620 | .version = "42", | |
621 | }; | |
622 | void *useraddr; | |
623 | u32 ethcmd; | |
624 | ||
625 | switch (cmd) { | |
626 | case SIOCETHTOOL: | |
627 | useraddr = ifr->ifr_data; | |
628 | if (copy_from_user(ðcmd, useraddr, sizeof(ethcmd))) | |
629 | return -EFAULT; | |
630 | ||
631 | switch (ethcmd) { | |
632 | case ETHTOOL_GDRVINFO: | |
633 | if (copy_to_user(useraddr, &info, sizeof(info))) | |
634 | return -EFAULT; | |
635 | return 0; | |
636 | default: | |
637 | return -EOPNOTSUPP; | |
638 | } | |
639 | default: | |
640 | return -EINVAL; | |
641 | } | |
642 | #endif | |
643 | return -EINVAL; | |
644 | } | |
645 | ||
646 | void iss_net_user_timer_expire(unsigned long _conn) | |
647 | { | |
648 | } | |
649 | ||
650 | ||
651 | static struct device_driver iss_net_driver = { | |
652 | .name = DRIVER_NAME, | |
653 | .bus = &platform_bus_type, | |
654 | }; | |
655 | ||
656 | static int driver_registered; | |
657 | ||
658 | static int iss_net_configure(int index, char *init) | |
659 | { | |
660 | struct net_device *dev; | |
661 | struct iss_net_private *lp; | |
662 | int err; | |
663 | ||
664 | if ((dev = alloc_etherdev(sizeof *lp)) == NULL) { | |
665 | printk(KERN_ERR "eth_configure: failed to allocate device\n"); | |
666 | return 1; | |
667 | } | |
668 | ||
669 | /* Initialize private element. */ | |
670 | ||
671 | lp = dev->priv; | |
672 | *lp = ((struct iss_net_private) { | |
673 | .device_list = LIST_HEAD_INIT(lp->device_list), | |
674 | .opened_list = LIST_HEAD_INIT(lp->opened_list), | |
675 | .lock = SPIN_LOCK_UNLOCKED, | |
676 | .dev = dev, | |
677 | .index = index, | |
678 | //.fd = -1, | |
679 | .mac = { 0xfe, 0xfd, 0x0, 0x0, 0x0, 0x0 }, | |
680 | .have_mac = 0, | |
681 | }); | |
682 | ||
683 | /* | |
684 | * Try all transport protocols. | |
685 | * Note: more protocols can be added by adding '&& !X_init(lp, eth)'. | |
686 | */ | |
687 | ||
688 | if (!tuntap_probe(lp, index, init)) { | |
689 | printk("Invalid arguments. Skipping device!\n"); | |
690 | goto errout; | |
691 | } | |
692 | ||
693 | printk(KERN_INFO "Netdevice %d ", index); | |
694 | if (lp->have_mac) | |
695 | printk("(%02x:%02x:%02x:%02x:%02x:%02x) ", | |
696 | lp->mac[0], lp->mac[1], | |
697 | lp->mac[2], lp->mac[3], | |
698 | lp->mac[4], lp->mac[5]); | |
699 | printk(": "); | |
700 | ||
701 | /* sysfs register */ | |
702 | ||
703 | if (!driver_registered) { | |
704 | driver_register(&iss_net_driver); | |
705 | driver_registered = 1; | |
706 | } | |
707 | ||
708 | spin_lock(&devices_lock); | |
709 | list_add(&lp->device_list, &devices); | |
710 | spin_unlock(&devices_lock); | |
711 | ||
712 | lp->pdev.id = index; | |
713 | lp->pdev.name = DRIVER_NAME; | |
714 | platform_device_register(&lp->pdev); | |
715 | SET_NETDEV_DEV(dev,&lp->pdev.dev); | |
716 | ||
717 | /* | |
718 | * If this name ends up conflicting with an existing registered | |
719 | * netdevice, that is OK, register_netdev{,ice}() will notice this | |
720 | * and fail. | |
721 | */ | |
722 | snprintf(dev->name, sizeof dev->name, "eth%d", index); | |
723 | ||
724 | dev->mtu = lp->mtu; | |
725 | dev->open = iss_net_open; | |
726 | dev->hard_start_xmit = iss_net_start_xmit; | |
727 | dev->stop = iss_net_close; | |
728 | dev->get_stats = iss_net_get_stats; | |
729 | dev->set_multicast_list = iss_net_set_multicast_list; | |
730 | dev->tx_timeout = iss_net_tx_timeout; | |
731 | dev->set_mac_address = iss_net_set_mac; | |
732 | dev->change_mtu = iss_net_change_mtu; | |
733 | dev->do_ioctl = iss_net_ioctl; | |
734 | dev->watchdog_timeo = (HZ >> 1); | |
735 | dev->irq = -1; | |
736 | ||
737 | rtnl_lock(); | |
738 | err = register_netdevice(dev); | |
739 | rtnl_unlock(); | |
740 | ||
741 | if (err) { | |
742 | printk("Error registering net device!\n"); | |
743 | /* XXX: should we call ->remove() here? */ | |
744 | free_netdev(dev); | |
745 | return 1; | |
746 | } | |
747 | ||
748 | init_timer(&lp->tl); | |
749 | lp->tl.function = iss_net_user_timer_expire; | |
750 | ||
751 | #if 0 | |
752 | if (lp->have_mac) | |
753 | set_ether_mac(dev, lp->mac); | |
754 | #endif | |
755 | return 0; | |
756 | ||
757 | errout: | |
758 | // FIXME: unregister; free, etc.. | |
759 | return -EIO; | |
760 | ||
761 | } | |
762 | ||
763 | /* ------------------------------------------------------------------------- */ | |
764 | ||
765 | /* Filled in during early boot */ | |
766 | ||
767 | struct list_head eth_cmd_line = LIST_HEAD_INIT(eth_cmd_line); | |
768 | ||
769 | struct iss_net_init { | |
770 | struct list_head list; | |
771 | char *init; /* init string */ | |
772 | int index; | |
773 | }; | |
774 | ||
775 | /* | |
776 | * Parse the command line and look for 'ethX=...' fields, and register all | |
777 | * those fields. They will be later initialized in iss_net_init. | |
778 | */ | |
779 | ||
780 | #define ERR KERN_ERR "iss_net_setup: " | |
781 | ||
782 | static int iss_net_setup(char *str) | |
783 | { | |
784 | struct iss_net_private *device = NULL; | |
785 | struct iss_net_init *new; | |
786 | struct list_head *ele; | |
787 | char *end; | |
788 | int n; | |
789 | ||
790 | n = simple_strtoul(str, &end, 0); | |
791 | if (end == str) { | |
792 | printk(ERR "Failed to parse '%s'\n", str); | |
793 | return 1; | |
794 | } | |
795 | if (n < 0) { | |
796 | printk(ERR "Device %d is negative\n", n); | |
797 | return 1; | |
798 | } | |
799 | if (*(str = end) != '=') { | |
800 | printk(ERR "Expected '=' after device number\n"); | |
801 | return 1; | |
802 | } | |
803 | ||
804 | spin_lock(&devices_lock); | |
805 | ||
806 | list_for_each(ele, &devices) { | |
807 | device = list_entry(ele, struct iss_net_private, device_list); | |
808 | if (device->index == n) | |
809 | break; | |
810 | } | |
811 | ||
812 | spin_unlock(&devices_lock); | |
813 | ||
814 | if (device && device->index == n) { | |
815 | printk(ERR "Device %d already configured\n", n); | |
816 | return 1; | |
817 | } | |
818 | ||
819 | if ((new = alloc_bootmem(sizeof new)) == NULL) { | |
820 | printk("Alloc_bootmem failed\n"); | |
821 | return 1; | |
822 | } | |
823 | ||
824 | INIT_LIST_HEAD(&new->list); | |
825 | new->index = n; | |
826 | new->init = str + 1; | |
827 | ||
828 | list_add_tail(&new->list, ð_cmd_line); | |
829 | return 1; | |
830 | } | |
831 | ||
832 | #undef ERR | |
833 | ||
834 | __setup("eth", iss_net_setup); | |
835 | ||
836 | /* | |
837 | * Initialize all ISS Ethernet devices previously registered in iss_net_setup. | |
838 | */ | |
839 | ||
840 | static int iss_net_init(void) | |
841 | { | |
842 | struct list_head *ele, *next; | |
843 | ||
844 | /* Walk through all Ethernet devices specified in the command line. */ | |
845 | ||
846 | list_for_each_safe(ele, next, ð_cmd_line) { | |
847 | struct iss_net_init *eth; | |
848 | eth = list_entry(ele, struct iss_net_init, list); | |
849 | iss_net_configure(eth->index, eth->init); | |
850 | } | |
851 | ||
852 | return 1; | |
853 | } | |
854 | ||
855 | module_init(iss_net_init); | |
856 |