Chris Zankel | 7282bee | 2005-06-23 22:01:33 -0700 | [diff] [blame] | 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 | |
Chris Zankel | 7282bee | 2005-06-23 22:01:33 -0700 | [diff] [blame] | 19 | #include <linux/list.h> |
| 20 | #include <linux/irq.h> |
| 21 | #include <linux/spinlock.h> |
| 22 | #include <linux/slab.h> |
| 23 | #include <linux/timer.h> |
| 24 | #include <linux/if_ether.h> |
| 25 | #include <linux/inetdevice.h> |
| 26 | #include <linux/init.h> |
| 27 | #include <linux/if_tun.h> |
| 28 | #include <linux/etherdevice.h> |
| 29 | #include <linux/interrupt.h> |
| 30 | #include <linux/ioctl.h> |
| 31 | #include <linux/bootmem.h> |
| 32 | #include <linux/ethtool.h> |
| 33 | #include <linux/rtnetlink.h> |
Russell King | d052d1b | 2005-10-29 19:07:23 +0100 | [diff] [blame] | 34 | #include <linux/platform_device.h> |
Chris Zankel | 7282bee | 2005-06-23 22:01:33 -0700 | [diff] [blame] | 35 | |
Chris Zankel | 173d6681 | 2006-12-10 02:18:48 -0800 | [diff] [blame] | 36 | #include <asm/platform/simcall.h> |
Chris Zankel | 7282bee | 2005-06-23 22:01:33 -0700 | [diff] [blame] | 37 | |
| 38 | #define DRIVER_NAME "iss-netdev" |
| 39 | #define ETH_MAX_PACKET 1500 |
| 40 | #define ETH_HEADER_OTHER 14 |
| 41 | #define ISS_NET_TIMER_VALUE (2 * HZ) |
| 42 | |
| 43 | |
| 44 | static DEFINE_SPINLOCK(opened_lock); |
| 45 | static LIST_HEAD(opened); |
| 46 | |
| 47 | static DEFINE_SPINLOCK(devices_lock); |
| 48 | static LIST_HEAD(devices); |
| 49 | |
| 50 | /* ------------------------------------------------------------------------- */ |
| 51 | |
| 52 | /* We currently only support the TUNTAP transport protocol. */ |
| 53 | |
| 54 | #define TRANSPORT_TUNTAP_NAME "tuntap" |
| 55 | #define TRANSPORT_TUNTAP_MTU ETH_MAX_PACKET |
| 56 | |
| 57 | struct tuntap_info { |
| 58 | char dev_name[IFNAMSIZ]; |
| 59 | int fixed_config; |
| 60 | unsigned char gw[ETH_ALEN]; |
| 61 | int fd; |
| 62 | }; |
| 63 | |
| 64 | /* ------------------------------------------------------------------------- */ |
| 65 | |
| 66 | |
| 67 | /* This structure contains out private information for the driver. */ |
| 68 | |
| 69 | struct iss_net_private { |
| 70 | |
| 71 | struct list_head device_list; |
| 72 | struct list_head opened_list; |
| 73 | |
| 74 | spinlock_t lock; |
| 75 | struct net_device *dev; |
| 76 | struct platform_device pdev; |
| 77 | struct timer_list tl; |
| 78 | struct net_device_stats stats; |
| 79 | |
| 80 | struct timer_list timer; |
| 81 | unsigned int timer_val; |
| 82 | |
| 83 | int index; |
| 84 | int mtu; |
| 85 | |
| 86 | unsigned char mac[ETH_ALEN]; |
| 87 | int have_mac; |
| 88 | |
| 89 | struct { |
| 90 | union { |
| 91 | struct tuntap_info tuntap; |
| 92 | } info; |
| 93 | |
| 94 | int (*open)(struct iss_net_private *lp); |
| 95 | void (*close)(struct iss_net_private *lp); |
| 96 | int (*read)(struct iss_net_private *lp, struct sk_buff **skb); |
| 97 | int (*write)(struct iss_net_private *lp, struct sk_buff **skb); |
| 98 | unsigned short (*protocol)(struct sk_buff *skb); |
| 99 | int (*poll)(struct iss_net_private *lp); |
| 100 | } tp; |
| 101 | |
| 102 | }; |
| 103 | |
| 104 | /* ======================= ISS SIMCALL INTERFACE =========================== */ |
| 105 | |
| 106 | /* Note: __simc must _not_ be declared inline! */ |
| 107 | |
| 108 | static int errno; |
| 109 | |
Marc Gauthier | c865415 | 2007-09-21 16:38:09 -0700 | [diff] [blame] | 110 | static int __simc (int a, int b, int c, int d, int e, int f) __attribute__((__noinline__)); |
Chris Zankel | 7282bee | 2005-06-23 22:01:33 -0700 | [diff] [blame] | 111 | static int __simc (int a, int b, int c, int d, int e, int f) |
| 112 | { |
| 113 | int ret; |
| 114 | __asm__ __volatile__ ("simcall\n" |
| 115 | "mov %0, a2\n" |
| 116 | "mov %1, a3\n" : "=a" (ret), "=a" (errno) |
| 117 | : : "a2", "a3"); |
| 118 | return ret; |
| 119 | } |
| 120 | |
| 121 | static int inline simc_open(char *file, int flags, int mode) |
| 122 | { |
| 123 | return __simc(SYS_open, (int) file, flags, mode, 0, 0); |
| 124 | } |
| 125 | |
| 126 | static int inline simc_close(int fd) |
| 127 | { |
| 128 | return __simc(SYS_close, fd, 0, 0, 0, 0); |
| 129 | } |
| 130 | |
| 131 | static int inline simc_ioctl(int fd, int request, void *arg) |
| 132 | { |
| 133 | return __simc(SYS_ioctl, fd, request, (int) arg, 0, 0); |
| 134 | } |
| 135 | |
| 136 | static int inline simc_read(int fd, void *buf, size_t count) |
| 137 | { |
| 138 | return __simc(SYS_read, fd, (int) buf, count, 0, 0); |
| 139 | } |
| 140 | |
| 141 | static int inline simc_write(int fd, void *buf, size_t count) |
| 142 | { |
| 143 | return __simc(SYS_write, fd, (int) buf, count, 0, 0); |
| 144 | } |
| 145 | |
| 146 | static int inline simc_poll(int fd) |
| 147 | { |
| 148 | struct timeval tv = { .tv_sec = 0, .tv_usec = 0 }; |
| 149 | |
| 150 | return __simc(SYS_select_one, fd, XTISS_SELECT_ONE_READ, (int)&tv,0,0); |
| 151 | } |
| 152 | |
| 153 | /* ================================ HELPERS ================================ */ |
| 154 | |
| 155 | |
| 156 | static char *split_if_spec(char *str, ...) |
| 157 | { |
| 158 | char **arg, *end; |
| 159 | va_list ap; |
| 160 | |
| 161 | va_start(ap, str); |
| 162 | while ((arg = va_arg(ap, char**)) != NULL) { |
| 163 | if (*str == '\0') |
| 164 | return NULL; |
| 165 | end = strchr(str, ','); |
| 166 | if (end != str) |
| 167 | *arg = str; |
| 168 | if (end == NULL) |
| 169 | return NULL; |
| 170 | *end ++ = '\0'; |
| 171 | str = end; |
| 172 | } |
| 173 | va_end(ap); |
| 174 | return str; |
| 175 | } |
| 176 | |
| 177 | |
| 178 | #if 0 |
| 179 | /* Adjust SKB. */ |
| 180 | |
| 181 | struct sk_buff *ether_adjust_skb(struct sk_buff *skb, int extra) |
| 182 | { |
| 183 | if ((skb != NULL) && (skb_tailroom(skb) < extra)) { |
| 184 | struct sk_buff *skb2; |
| 185 | |
| 186 | skb2 = skb_copy_expand(skb, 0, extra, GFP_ATOMIC); |
| 187 | dev_kfree_skb(skb); |
| 188 | skb = skb2; |
| 189 | } |
| 190 | if (skb != NULL) |
| 191 | skb_put(skb, extra); |
| 192 | |
| 193 | return skb; |
| 194 | } |
| 195 | #endif |
| 196 | |
| 197 | /* Return the IP address as a string for a given device. */ |
| 198 | |
| 199 | static void dev_ip_addr(void *d, char *buf, char *bin_buf) |
| 200 | { |
| 201 | struct net_device *dev = d; |
| 202 | struct in_device *ip = dev->ip_ptr; |
| 203 | struct in_ifaddr *in; |
Al Viro | a144ea4 | 2006-09-28 18:00:55 -0700 | [diff] [blame] | 204 | __be32 addr; |
Chris Zankel | 7282bee | 2005-06-23 22:01:33 -0700 | [diff] [blame] | 205 | |
| 206 | if ((ip == NULL) || ((in = ip->ifa_list) == NULL)) { |
| 207 | printk(KERN_WARNING "Device not assigned an IP address!\n"); |
| 208 | return; |
| 209 | } |
| 210 | |
| 211 | addr = in->ifa_address; |
| 212 | sprintf(buf, "%d.%d.%d.%d", addr & 0xff, (addr >> 8) & 0xff, |
| 213 | (addr >> 16) & 0xff, addr >> 24); |
| 214 | |
| 215 | if (bin_buf) { |
| 216 | bin_buf[0] = addr & 0xff; |
| 217 | bin_buf[1] = (addr >> 8) & 0xff; |
| 218 | bin_buf[2] = (addr >> 16) & 0xff; |
| 219 | bin_buf[3] = addr >> 24; |
| 220 | } |
| 221 | } |
| 222 | |
| 223 | /* Set Ethernet address of the specified device. */ |
| 224 | |
| 225 | static void inline set_ether_mac(void *d, unsigned char *addr) |
| 226 | { |
| 227 | struct net_device *dev = d; |
| 228 | memcpy(dev->dev_addr, addr, ETH_ALEN); |
| 229 | } |
| 230 | |
| 231 | |
| 232 | /* ======================= TUNTAP TRANSPORT INTERFACE ====================== */ |
| 233 | |
| 234 | static int tuntap_open(struct iss_net_private *lp) |
| 235 | { |
| 236 | struct ifreq ifr; |
| 237 | char *dev_name = lp->tp.info.tuntap.dev_name; |
| 238 | int err = -EINVAL; |
| 239 | int fd; |
| 240 | |
| 241 | /* We currently only support a fixed configuration. */ |
| 242 | |
| 243 | if (!lp->tp.info.tuntap.fixed_config) |
| 244 | return -EINVAL; |
| 245 | |
| 246 | if ((fd = simc_open("/dev/net/tun", 02, 0)) < 0) { /* O_RDWR */ |
| 247 | printk("Failed to open /dev/net/tun, returned %d " |
| 248 | "(errno = %d)\n", fd, errno); |
| 249 | return fd; |
| 250 | } |
| 251 | |
| 252 | memset(&ifr, 0, sizeof ifr); |
| 253 | ifr.ifr_flags = IFF_TAP | IFF_NO_PI; |
Jean Delvare | 0ddb16c | 2007-05-06 14:51:54 -0700 | [diff] [blame] | 254 | strlcpy(ifr.ifr_name, dev_name, sizeof ifr.ifr_name); |
Chris Zankel | 7282bee | 2005-06-23 22:01:33 -0700 | [diff] [blame] | 255 | |
| 256 | if ((err = simc_ioctl(fd, TUNSETIFF, (void*) &ifr)) < 0) { |
| 257 | printk("Failed to set interface, returned %d " |
| 258 | "(errno = %d)\n", err, errno); |
| 259 | simc_close(fd); |
| 260 | return err; |
| 261 | } |
| 262 | |
| 263 | lp->tp.info.tuntap.fd = fd; |
| 264 | return err; |
| 265 | } |
| 266 | |
| 267 | static void tuntap_close(struct iss_net_private *lp) |
| 268 | { |
| 269 | #if 0 |
| 270 | if (lp->tp.info.tuntap.fixed_config) |
| 271 | iter_addresses(lp->tp.info.tuntap.dev, close_addr, lp->host.dev_name); |
| 272 | #endif |
| 273 | simc_close(lp->tp.info.tuntap.fd); |
| 274 | lp->tp.info.tuntap.fd = -1; |
| 275 | } |
| 276 | |
| 277 | static int tuntap_read (struct iss_net_private *lp, struct sk_buff **skb) |
| 278 | { |
| 279 | #if 0 |
| 280 | *skb = ether_adjust_skb(*skb, ETH_HEADER_OTHER); |
| 281 | if (*skb == NULL) |
| 282 | return -ENOMEM; |
| 283 | #endif |
| 284 | |
| 285 | return simc_read(lp->tp.info.tuntap.fd, |
| 286 | (*skb)->data, (*skb)->dev->mtu + ETH_HEADER_OTHER); |
| 287 | } |
| 288 | |
| 289 | static int tuntap_write (struct iss_net_private *lp, struct sk_buff **skb) |
| 290 | { |
| 291 | return simc_write(lp->tp.info.tuntap.fd, (*skb)->data, (*skb)->len); |
| 292 | } |
| 293 | |
| 294 | unsigned short tuntap_protocol(struct sk_buff *skb) |
| 295 | { |
| 296 | return eth_type_trans(skb, skb->dev); |
| 297 | } |
| 298 | |
| 299 | static int tuntap_poll(struct iss_net_private *lp) |
| 300 | { |
| 301 | return simc_poll(lp->tp.info.tuntap.fd); |
| 302 | } |
| 303 | |
| 304 | /* |
| 305 | * Currently only a device name is supported. |
| 306 | * ethX=tuntap[,[mac address][,[device name]]] |
| 307 | */ |
| 308 | |
| 309 | static int tuntap_probe(struct iss_net_private *lp, int index, char *init) |
| 310 | { |
| 311 | const int len = strlen(TRANSPORT_TUNTAP_NAME); |
| 312 | char *dev_name = NULL, *mac_str = NULL, *rem = NULL; |
| 313 | |
| 314 | /* Transport should be 'tuntap': ethX=tuntap,mac,dev_name */ |
| 315 | |
| 316 | if (strncmp(init, TRANSPORT_TUNTAP_NAME, len)) |
| 317 | return 0; |
| 318 | |
| 319 | if (*(init += strlen(TRANSPORT_TUNTAP_NAME)) == ',') { |
| 320 | if ((rem=split_if_spec(init+1, &mac_str, &dev_name)) != NULL) { |
| 321 | printk("Extra garbage on specification : '%s'\n", rem); |
| 322 | return 0; |
| 323 | } |
| 324 | } else if (*init != '\0') { |
| 325 | printk("Invalid argument: %s. Skipping device!\n", init); |
| 326 | return 0; |
| 327 | } |
| 328 | |
| 329 | if (dev_name) { |
| 330 | strncpy(lp->tp.info.tuntap.dev_name, dev_name, |
| 331 | sizeof lp->tp.info.tuntap.dev_name); |
| 332 | lp->tp.info.tuntap.fixed_config = 1; |
| 333 | } else |
| 334 | strcpy(lp->tp.info.tuntap.dev_name, TRANSPORT_TUNTAP_NAME); |
| 335 | |
| 336 | |
| 337 | #if 0 |
| 338 | if (setup_etheraddr(mac_str, lp->mac)) |
| 339 | lp->have_mac = 1; |
| 340 | #endif |
| 341 | lp->mtu = TRANSPORT_TUNTAP_MTU; |
| 342 | |
| 343 | //lp->info.tuntap.gate_addr = gate_addr; |
| 344 | |
| 345 | lp->tp.info.tuntap.fd = -1; |
| 346 | |
| 347 | lp->tp.open = tuntap_open; |
| 348 | lp->tp.close = tuntap_close; |
| 349 | lp->tp.read = tuntap_read; |
| 350 | lp->tp.write = tuntap_write; |
| 351 | lp->tp.protocol = tuntap_protocol; |
| 352 | lp->tp.poll = tuntap_poll; |
| 353 | |
| 354 | printk("TUN/TAP backend - "); |
| 355 | #if 0 |
| 356 | if (lp->host.gate_addr != NULL) |
| 357 | printk("IP = %s", lp->host.gate_addr); |
| 358 | #endif |
| 359 | printk("\n"); |
| 360 | |
| 361 | return 1; |
| 362 | } |
| 363 | |
| 364 | /* ================================ ISS NET ================================ */ |
| 365 | |
| 366 | static int iss_net_rx(struct net_device *dev) |
| 367 | { |
| 368 | struct iss_net_private *lp = dev->priv; |
| 369 | int pkt_len; |
| 370 | struct sk_buff *skb; |
| 371 | |
| 372 | /* Check if there is any new data. */ |
| 373 | |
| 374 | if (lp->tp.poll(lp) == 0) |
| 375 | return 0; |
| 376 | |
| 377 | /* Try to allocate memory, if it fails, try again next round. */ |
| 378 | |
| 379 | if ((skb = dev_alloc_skb(dev->mtu + 2 + ETH_HEADER_OTHER)) == NULL) { |
| 380 | lp->stats.rx_dropped++; |
| 381 | return 0; |
| 382 | } |
| 383 | |
| 384 | skb_reserve(skb, 2); |
| 385 | |
| 386 | /* Setup skb */ |
| 387 | |
| 388 | skb->dev = dev; |
Arnaldo Carvalho de Melo | 459a98e | 2007-03-19 15:30:44 -0700 | [diff] [blame] | 389 | skb_reset_mac_header(skb); |
Chris Zankel | 7282bee | 2005-06-23 22:01:33 -0700 | [diff] [blame] | 390 | pkt_len = lp->tp.read(lp, &skb); |
| 391 | skb_put(skb, pkt_len); |
| 392 | |
| 393 | if (pkt_len > 0) { |
| 394 | skb_trim(skb, pkt_len); |
| 395 | skb->protocol = lp->tp.protocol(skb); |
Chris Zankel | 7282bee | 2005-06-23 22:01:33 -0700 | [diff] [blame] | 396 | |
| 397 | lp->stats.rx_bytes += skb->len; |
| 398 | lp->stats.rx_packets++; |
Julia Lawall | 299f590 | 2007-12-10 17:16:56 -0800 | [diff] [blame] | 399 | // netif_rx(skb); |
| 400 | netif_rx_ni(skb); |
Chris Zankel | 7282bee | 2005-06-23 22:01:33 -0700 | [diff] [blame] | 401 | return pkt_len; |
| 402 | } |
| 403 | kfree_skb(skb); |
| 404 | return pkt_len; |
| 405 | } |
| 406 | |
| 407 | static int iss_net_poll(void) |
| 408 | { |
| 409 | struct list_head *ele; |
| 410 | int err, ret = 0; |
| 411 | |
| 412 | spin_lock(&opened_lock); |
| 413 | |
| 414 | list_for_each(ele, &opened) { |
| 415 | struct iss_net_private *lp; |
| 416 | |
| 417 | lp = list_entry(ele, struct iss_net_private, opened_list); |
| 418 | |
| 419 | if (!netif_running(lp->dev)) |
| 420 | break; |
| 421 | |
| 422 | spin_lock(&lp->lock); |
| 423 | |
| 424 | while ((err = iss_net_rx(lp->dev)) > 0) |
| 425 | ret++; |
| 426 | |
| 427 | spin_unlock(&lp->lock); |
| 428 | |
| 429 | if (err < 0) { |
| 430 | printk(KERN_ERR "Device '%s' read returned %d, " |
| 431 | "shutting it down\n", lp->dev->name, err); |
| 432 | dev_close(lp->dev); |
| 433 | } else { |
| 434 | // FIXME reactivate_fd(lp->fd, ISS_ETH_IRQ); |
| 435 | } |
| 436 | } |
| 437 | |
| 438 | spin_unlock(&opened_lock); |
| 439 | return ret; |
| 440 | } |
| 441 | |
| 442 | |
| 443 | static void iss_net_timer(unsigned long priv) |
| 444 | { |
| 445 | struct iss_net_private* lp = (struct iss_net_private*) priv; |
| 446 | |
| 447 | spin_lock(&lp->lock); |
| 448 | |
| 449 | iss_net_poll(); |
| 450 | |
| 451 | mod_timer(&lp->timer, jiffies + lp->timer_val); |
| 452 | |
| 453 | spin_unlock(&lp->lock); |
| 454 | } |
| 455 | |
| 456 | |
| 457 | static int iss_net_open(struct net_device *dev) |
| 458 | { |
| 459 | struct iss_net_private *lp = dev->priv; |
| 460 | char addr[sizeof "255.255.255.255\0"]; |
| 461 | int err; |
| 462 | |
| 463 | spin_lock(&lp->lock); |
| 464 | |
| 465 | if ((err = lp->tp.open(lp)) < 0) |
| 466 | goto out; |
| 467 | |
| 468 | if (!lp->have_mac) { |
| 469 | dev_ip_addr(dev, addr, &lp->mac[2]); |
| 470 | set_ether_mac(dev, lp->mac); |
| 471 | } |
| 472 | |
| 473 | netif_start_queue(dev); |
| 474 | |
| 475 | /* clear buffer - it can happen that the host side of the interface |
Chris Zankel | 4af410a | 2007-05-31 17:43:40 -0700 | [diff] [blame] | 476 | * is full when we get here. In this case, new data is never queued, |
Chris Zankel | 7282bee | 2005-06-23 22:01:33 -0700 | [diff] [blame] | 477 | * SIGIOs never arrive, and the net never works. |
| 478 | */ |
| 479 | while ((err = iss_net_rx(dev)) > 0) |
| 480 | ; |
| 481 | |
| 482 | spin_lock(&opened_lock); |
| 483 | list_add(&lp->opened_list, &opened); |
| 484 | spin_unlock(&opened_lock); |
| 485 | |
| 486 | init_timer(&lp->timer); |
| 487 | lp->timer_val = ISS_NET_TIMER_VALUE; |
| 488 | lp->timer.data = (unsigned long) lp; |
| 489 | lp->timer.function = iss_net_timer; |
| 490 | mod_timer(&lp->timer, jiffies + lp->timer_val); |
| 491 | |
| 492 | out: |
| 493 | spin_unlock(&lp->lock); |
| 494 | return err; |
| 495 | } |
| 496 | |
| 497 | static int iss_net_close(struct net_device *dev) |
| 498 | { |
| 499 | struct iss_net_private *lp = dev->priv; |
| 500 | printk("iss_net_close!\n"); |
| 501 | netif_stop_queue(dev); |
| 502 | spin_lock(&lp->lock); |
| 503 | |
| 504 | spin_lock(&opened_lock); |
| 505 | list_del(&opened); |
| 506 | spin_unlock(&opened_lock); |
| 507 | |
| 508 | del_timer_sync(&lp->timer); |
| 509 | |
| 510 | lp->tp.close(lp); |
| 511 | |
| 512 | spin_unlock(&lp->lock); |
| 513 | return 0; |
| 514 | } |
| 515 | |
| 516 | static int iss_net_start_xmit(struct sk_buff *skb, struct net_device *dev) |
| 517 | { |
| 518 | struct iss_net_private *lp = dev->priv; |
| 519 | unsigned long flags; |
| 520 | int len; |
| 521 | |
| 522 | netif_stop_queue(dev); |
| 523 | spin_lock_irqsave(&lp->lock, flags); |
| 524 | |
| 525 | len = lp->tp.write(lp, &skb); |
| 526 | |
| 527 | if (len == skb->len) { |
| 528 | lp->stats.tx_packets++; |
| 529 | lp->stats.tx_bytes += skb->len; |
| 530 | dev->trans_start = jiffies; |
| 531 | netif_start_queue(dev); |
| 532 | |
| 533 | /* this is normally done in the interrupt when tx finishes */ |
| 534 | netif_wake_queue(dev); |
| 535 | |
| 536 | } else if (len == 0) { |
| 537 | netif_start_queue(dev); |
| 538 | lp->stats.tx_dropped++; |
| 539 | |
| 540 | } else { |
| 541 | netif_start_queue(dev); |
| 542 | printk(KERN_ERR "iss_net_start_xmit: failed(%d)\n", len); |
| 543 | } |
| 544 | |
| 545 | spin_unlock_irqrestore(&lp->lock, flags); |
| 546 | |
| 547 | dev_kfree_skb(skb); |
| 548 | return 0; |
| 549 | } |
| 550 | |
| 551 | |
| 552 | static struct net_device_stats *iss_net_get_stats(struct net_device *dev) |
| 553 | { |
| 554 | struct iss_net_private *lp = dev->priv; |
| 555 | return &lp->stats; |
| 556 | } |
| 557 | |
| 558 | static void iss_net_set_multicast_list(struct net_device *dev) |
| 559 | { |
| 560 | #if 0 |
| 561 | if (dev->flags & IFF_PROMISC) |
| 562 | return; |
| 563 | else if (dev->mc_count) |
| 564 | dev->flags |= IFF_ALLMULTI; |
| 565 | else |
| 566 | dev->flags &= ~IFF_ALLMULTI; |
| 567 | #endif |
| 568 | } |
| 569 | |
| 570 | static void iss_net_tx_timeout(struct net_device *dev) |
| 571 | { |
| 572 | #if 0 |
| 573 | dev->trans_start = jiffies; |
| 574 | netif_wake_queue(dev); |
| 575 | #endif |
| 576 | } |
| 577 | |
| 578 | static int iss_net_set_mac(struct net_device *dev, void *addr) |
| 579 | { |
| 580 | #if 0 |
| 581 | struct iss_net_private *lp = dev->priv; |
| 582 | struct sockaddr *hwaddr = addr; |
| 583 | |
| 584 | spin_lock(&lp->lock); |
| 585 | memcpy(dev->dev_addr, hwaddr->sa_data, ETH_ALEN); |
| 586 | spin_unlock(&lp->lock); |
| 587 | #endif |
| 588 | |
| 589 | return 0; |
| 590 | } |
| 591 | |
| 592 | static int iss_net_change_mtu(struct net_device *dev, int new_mtu) |
| 593 | { |
| 594 | #if 0 |
| 595 | struct iss_net_private *lp = dev->priv; |
| 596 | int err = 0; |
| 597 | |
| 598 | spin_lock(&lp->lock); |
| 599 | |
| 600 | // FIXME not needed new_mtu = transport_set_mtu(new_mtu, &lp->user); |
| 601 | |
| 602 | if (new_mtu < 0) |
| 603 | err = new_mtu; |
| 604 | else |
| 605 | dev->mtu = new_mtu; |
| 606 | |
| 607 | spin_unlock(&lp->lock); |
| 608 | return err; |
| 609 | #endif |
| 610 | return -EINVAL; |
| 611 | } |
| 612 | |
Chris Zankel | 7282bee | 2005-06-23 22:01:33 -0700 | [diff] [blame] | 613 | void iss_net_user_timer_expire(unsigned long _conn) |
| 614 | { |
| 615 | } |
| 616 | |
| 617 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 618 | static struct platform_driver iss_net_driver = { |
| 619 | .driver = { |
| 620 | .name = DRIVER_NAME, |
| 621 | }, |
Chris Zankel | 7282bee | 2005-06-23 22:01:33 -0700 | [diff] [blame] | 622 | }; |
| 623 | |
| 624 | static int driver_registered; |
| 625 | |
| 626 | static int iss_net_configure(int index, char *init) |
| 627 | { |
| 628 | struct net_device *dev; |
| 629 | struct iss_net_private *lp; |
| 630 | int err; |
| 631 | |
| 632 | if ((dev = alloc_etherdev(sizeof *lp)) == NULL) { |
| 633 | printk(KERN_ERR "eth_configure: failed to allocate device\n"); |
| 634 | return 1; |
| 635 | } |
| 636 | |
| 637 | /* Initialize private element. */ |
| 638 | |
| 639 | lp = dev->priv; |
| 640 | *lp = ((struct iss_net_private) { |
| 641 | .device_list = LIST_HEAD_INIT(lp->device_list), |
| 642 | .opened_list = LIST_HEAD_INIT(lp->opened_list), |
Robert P. J. Day | ef9c2f0 | 2008-07-30 12:48:55 -0700 | [diff] [blame] | 643 | .lock = __SPIN_LOCK_UNLOCKED(lp.lock), |
Chris Zankel | 7282bee | 2005-06-23 22:01:33 -0700 | [diff] [blame] | 644 | .dev = dev, |
| 645 | .index = index, |
| 646 | //.fd = -1, |
| 647 | .mac = { 0xfe, 0xfd, 0x0, 0x0, 0x0, 0x0 }, |
| 648 | .have_mac = 0, |
| 649 | }); |
| 650 | |
| 651 | /* |
| 652 | * Try all transport protocols. |
| 653 | * Note: more protocols can be added by adding '&& !X_init(lp, eth)'. |
| 654 | */ |
| 655 | |
| 656 | if (!tuntap_probe(lp, index, init)) { |
| 657 | printk("Invalid arguments. Skipping device!\n"); |
| 658 | goto errout; |
| 659 | } |
| 660 | |
| 661 | printk(KERN_INFO "Netdevice %d ", index); |
| 662 | if (lp->have_mac) |
| 663 | printk("(%02x:%02x:%02x:%02x:%02x:%02x) ", |
| 664 | lp->mac[0], lp->mac[1], |
| 665 | lp->mac[2], lp->mac[3], |
| 666 | lp->mac[4], lp->mac[5]); |
| 667 | printk(": "); |
| 668 | |
| 669 | /* sysfs register */ |
| 670 | |
| 671 | if (!driver_registered) { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 672 | platform_driver_register(&iss_net_driver); |
Chris Zankel | 7282bee | 2005-06-23 22:01:33 -0700 | [diff] [blame] | 673 | driver_registered = 1; |
| 674 | } |
| 675 | |
| 676 | spin_lock(&devices_lock); |
| 677 | list_add(&lp->device_list, &devices); |
| 678 | spin_unlock(&devices_lock); |
| 679 | |
| 680 | lp->pdev.id = index; |
| 681 | lp->pdev.name = DRIVER_NAME; |
| 682 | platform_device_register(&lp->pdev); |
| 683 | SET_NETDEV_DEV(dev,&lp->pdev.dev); |
| 684 | |
| 685 | /* |
| 686 | * If this name ends up conflicting with an existing registered |
| 687 | * netdevice, that is OK, register_netdev{,ice}() will notice this |
| 688 | * and fail. |
| 689 | */ |
| 690 | snprintf(dev->name, sizeof dev->name, "eth%d", index); |
| 691 | |
| 692 | dev->mtu = lp->mtu; |
| 693 | dev->open = iss_net_open; |
| 694 | dev->hard_start_xmit = iss_net_start_xmit; |
| 695 | dev->stop = iss_net_close; |
| 696 | dev->get_stats = iss_net_get_stats; |
| 697 | dev->set_multicast_list = iss_net_set_multicast_list; |
| 698 | dev->tx_timeout = iss_net_tx_timeout; |
| 699 | dev->set_mac_address = iss_net_set_mac; |
| 700 | dev->change_mtu = iss_net_change_mtu; |
Chris Zankel | 7282bee | 2005-06-23 22:01:33 -0700 | [diff] [blame] | 701 | dev->watchdog_timeo = (HZ >> 1); |
| 702 | dev->irq = -1; |
| 703 | |
| 704 | rtnl_lock(); |
| 705 | err = register_netdevice(dev); |
| 706 | rtnl_unlock(); |
| 707 | |
| 708 | if (err) { |
| 709 | printk("Error registering net device!\n"); |
| 710 | /* XXX: should we call ->remove() here? */ |
| 711 | free_netdev(dev); |
| 712 | return 1; |
| 713 | } |
| 714 | |
| 715 | init_timer(&lp->tl); |
| 716 | lp->tl.function = iss_net_user_timer_expire; |
| 717 | |
| 718 | #if 0 |
| 719 | if (lp->have_mac) |
| 720 | set_ether_mac(dev, lp->mac); |
| 721 | #endif |
| 722 | return 0; |
| 723 | |
| 724 | errout: |
| 725 | // FIXME: unregister; free, etc.. |
| 726 | return -EIO; |
| 727 | |
| 728 | } |
| 729 | |
| 730 | /* ------------------------------------------------------------------------- */ |
| 731 | |
| 732 | /* Filled in during early boot */ |
| 733 | |
| 734 | struct list_head eth_cmd_line = LIST_HEAD_INIT(eth_cmd_line); |
| 735 | |
| 736 | struct iss_net_init { |
| 737 | struct list_head list; |
| 738 | char *init; /* init string */ |
| 739 | int index; |
| 740 | }; |
| 741 | |
| 742 | /* |
| 743 | * Parse the command line and look for 'ethX=...' fields, and register all |
| 744 | * those fields. They will be later initialized in iss_net_init. |
| 745 | */ |
| 746 | |
| 747 | #define ERR KERN_ERR "iss_net_setup: " |
| 748 | |
| 749 | static int iss_net_setup(char *str) |
| 750 | { |
| 751 | struct iss_net_private *device = NULL; |
| 752 | struct iss_net_init *new; |
| 753 | struct list_head *ele; |
| 754 | char *end; |
| 755 | int n; |
| 756 | |
| 757 | n = simple_strtoul(str, &end, 0); |
| 758 | if (end == str) { |
| 759 | printk(ERR "Failed to parse '%s'\n", str); |
| 760 | return 1; |
| 761 | } |
| 762 | if (n < 0) { |
| 763 | printk(ERR "Device %d is negative\n", n); |
| 764 | return 1; |
| 765 | } |
| 766 | if (*(str = end) != '=') { |
| 767 | printk(ERR "Expected '=' after device number\n"); |
| 768 | return 1; |
| 769 | } |
| 770 | |
| 771 | spin_lock(&devices_lock); |
| 772 | |
| 773 | list_for_each(ele, &devices) { |
| 774 | device = list_entry(ele, struct iss_net_private, device_list); |
| 775 | if (device->index == n) |
| 776 | break; |
| 777 | } |
| 778 | |
| 779 | spin_unlock(&devices_lock); |
| 780 | |
| 781 | if (device && device->index == n) { |
| 782 | printk(ERR "Device %d already configured\n", n); |
| 783 | return 1; |
| 784 | } |
| 785 | |
| 786 | if ((new = alloc_bootmem(sizeof new)) == NULL) { |
| 787 | printk("Alloc_bootmem failed\n"); |
| 788 | return 1; |
| 789 | } |
| 790 | |
| 791 | INIT_LIST_HEAD(&new->list); |
| 792 | new->index = n; |
| 793 | new->init = str + 1; |
| 794 | |
| 795 | list_add_tail(&new->list, ð_cmd_line); |
| 796 | return 1; |
| 797 | } |
| 798 | |
| 799 | #undef ERR |
| 800 | |
Robert P. J. Day | 0a8141e | 2007-10-20 00:20:15 +0200 | [diff] [blame] | 801 | __setup("eth=", iss_net_setup); |
Chris Zankel | 7282bee | 2005-06-23 22:01:33 -0700 | [diff] [blame] | 802 | |
| 803 | /* |
| 804 | * Initialize all ISS Ethernet devices previously registered in iss_net_setup. |
| 805 | */ |
| 806 | |
| 807 | static int iss_net_init(void) |
| 808 | { |
| 809 | struct list_head *ele, *next; |
| 810 | |
| 811 | /* Walk through all Ethernet devices specified in the command line. */ |
| 812 | |
| 813 | list_for_each_safe(ele, next, ð_cmd_line) { |
| 814 | struct iss_net_init *eth; |
| 815 | eth = list_entry(ele, struct iss_net_init, list); |
| 816 | iss_net_configure(eth->index, eth->init); |
| 817 | } |
| 818 | |
| 819 | return 1; |
| 820 | } |
| 821 | |
| 822 | module_init(iss_net_init); |
| 823 | |