1 /*- 2 * Copyright (c) 2000-2001 Benno Rice 3 * Copyright (c) 2007 Semihalf, Rafal Jaworowski <raj@semihalf.com> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/param.h> 29 #include <sys/types.h> 30 #include <sys/socket.h> 31 32 #include <net/if.h> 33 #include <netinet/in.h> 34 #include <netinet/in_systm.h> 35 #include <netinet/if_ether.h> 36 #include <netinet/ip.h> 37 38 #include <stand.h> 39 #include <net.h> 40 #include <netif.h> 41 42 #include "api_public.h" 43 #include "glue.h" 44 #include "libuboot.h" 45 #include "dev_net.h" 46 47 static int net_probe(struct netif *, void *); 48 static int net_match(struct netif *, void *); 49 static void net_init(struct iodesc *, void *); 50 static ssize_t net_get(struct iodesc *, void **, time_t); 51 static ssize_t net_put(struct iodesc *, void *, size_t); 52 static void net_end(struct netif *); 53 54 extern struct netif_stats net_stats[]; 55 56 struct netif_dif net_ifs[] = { 57 /* dif_unit dif_nsel dif_stats dif_private */ 58 { 0, 1, &net_stats[0], 0, }, 59 }; 60 61 struct netif_stats net_stats[nitems(net_ifs)]; 62 63 struct netif_driver uboot_net = { 64 "uboot_eth", /* netif_bname */ 65 net_match, /* netif_match */ 66 net_probe, /* netif_probe */ 67 net_init, /* netif_init */ 68 net_get, /* netif_get */ 69 net_put, /* netif_put */ 70 net_end, /* netif_end */ 71 net_ifs, /* netif_ifs */ 72 nitems(net_ifs) /* netif_nifs */ 73 }; 74 75 struct uboot_softc { 76 uint32_t sc_pad; 77 uint8_t sc_rxbuf[ETHER_MAX_LEN]; 78 uint8_t sc_txbuf[ETHER_MAX_LEN + PKTALIGN]; 79 uint8_t *sc_txbufp; 80 int sc_handle; /* device handle for ub_dev_xxx */ 81 }; 82 83 static struct uboot_softc uboot_softc; 84 85 /* 86 * get_env_net_params() 87 * 88 * Attempt to obtain all the parms we need for netbooting from the U-Boot 89 * environment. If we fail to obtain the values it may still be possible to 90 * netboot; the net_dev code will attempt to get the values from bootp, rarp, 91 * and other such sources. 92 * 93 * If rootip.s_addr is non-zero net_dev assumes the required global variables 94 * are set and skips the bootp inquiry. For that reason, we don't set rootip 95 * until we've verified that we have at least the minimum required info. 96 * 97 * This is called from netif_init() which can result in it getting called 98 * multiple times, by design. The network code at higher layers zeroes out 99 * rootip when it closes a network interface, so if it gets opened again we have 100 * to obtain all this info again. 101 */ 102 static void 103 get_env_net_params(void) 104 { 105 char *envstr; 106 in_addr_t rootaddr, serveraddr; 107 108 /* 109 * Silently get out right away if we don't have rootpath, because none 110 * of the other info we obtain below is sufficient to boot without it. 111 * 112 * If we do have rootpath, copy it into the global var and also set 113 * dhcp.root-path in the env. If we don't get all the other info from 114 * the u-boot env below, we will still try dhcp/bootp, but the server- 115 * provided path will not replace the user-provided value we set here. 116 */ 117 if ((envstr = ub_env_get("rootpath")) == NULL) 118 return; 119 strlcpy(rootpath, envstr, sizeof(rootpath)); 120 setenv("dhcp.root-path", rootpath, 0); 121 122 /* 123 * Our own IP address must be valid. Silently get out if it's not set, 124 * but whine if it's there and we can't parse it. 125 */ 126 if ((envstr = ub_env_get("ipaddr")) == NULL) 127 return; 128 if ((myip.s_addr = inet_addr(envstr)) == INADDR_NONE) { 129 printf("Could not parse ipaddr '%s'\n", envstr); 130 return; 131 } 132 133 /* 134 * Netmask is optional, default to the "natural" netmask for our IP, but 135 * whine if it was provided and we couldn't parse it. 136 */ 137 if ((envstr = ub_env_get("netmask")) != NULL && 138 (netmask = inet_addr(envstr)) == INADDR_NONE) { 139 printf("Could not parse netmask '%s'\n", envstr); 140 } 141 if (netmask == INADDR_NONE) { 142 if (IN_CLASSA(myip.s_addr)) 143 netmask = IN_CLASSA_NET; 144 else if (IN_CLASSB(myip.s_addr)) 145 netmask = IN_CLASSB_NET; 146 else 147 netmask = IN_CLASSC_NET; 148 } 149 150 /* 151 * Get optional serverip before rootpath; the latter can override it. 152 * Whine only if it's present but can't be parsed. 153 */ 154 serveraddr = INADDR_NONE; 155 if ((envstr = ub_env_get("serverip")) != NULL) { 156 if ((serveraddr = inet_addr(envstr)) == INADDR_NONE) 157 printf("Could not parse serverip '%s'\n", envstr); 158 } 159 160 /* 161 * There must be a rootpath. It may be ip:/path or it may be just the 162 * path in which case the ip needs to be in serverip. 163 */ 164 rootaddr = net_parse_rootpath(); 165 if (rootaddr == INADDR_NONE) 166 rootaddr = serveraddr; 167 if (rootaddr == INADDR_NONE) { 168 printf("No server address for rootpath '%s'\n", envstr); 169 return; 170 } 171 rootip.s_addr = rootaddr; 172 173 /* 174 * Gateway IP is optional unless rootip is on a different net in which 175 * case whine if it's missing or we can't parse it, and set rootip addr 176 * to zero, which signals to other network code that network params 177 * aren't set (so it will try dhcp, bootp, etc). 178 */ 179 envstr = ub_env_get("gatewayip"); 180 if (!SAMENET(myip, rootip, netmask)) { 181 if (envstr == NULL) { 182 printf("Need gatewayip for a root server on a " 183 "different network.\n"); 184 rootip.s_addr = 0; 185 return; 186 } 187 if ((gateip.s_addr = inet_addr(envstr)) == INADDR_NONE) { 188 printf("Could not parse gatewayip '%s'\n", envstr); 189 rootip.s_addr = 0; 190 return; 191 } 192 } 193 } 194 195 static int 196 net_match(struct netif *nif, void *machdep_hint) 197 { 198 char **a = (char **)machdep_hint; 199 200 if (memcmp("net", *a, 3) == 0) 201 return (1); 202 203 printf("net_match: could not match network device\n"); 204 return (0); 205 } 206 207 static int 208 net_probe(struct netif *nif, void *machdep_hint) 209 { 210 struct device_info *di; 211 int i; 212 213 for (i = 0; i < devs_no; i++) 214 if ((di = ub_dev_get(i)) != NULL) 215 if (di->type == DEV_TYP_NET) 216 break; 217 218 if (i == devs_no) { 219 printf("net_probe: no network devices found, maybe not" 220 " enumerated yet..?\n"); 221 return (-1); 222 } 223 224 #if defined(NETIF_DEBUG) 225 printf("net_probe: network device found: %d\n", i); 226 #endif 227 uboot_softc.sc_handle = i; 228 229 return (0); 230 } 231 232 static ssize_t 233 net_put(struct iodesc *desc, void *pkt, size_t len) 234 { 235 struct netif *nif = desc->io_netif; 236 struct uboot_softc *sc = nif->nif_devdata; 237 size_t sendlen; 238 ssize_t rv; 239 240 #if defined(NETIF_DEBUG) 241 struct ether_header *eh; 242 243 printf("net_put: desc %p, pkt %p, len %d\n", desc, pkt, len); 244 eh = pkt; 245 printf("dst: %s ", ether_sprintf(eh->ether_dhost)); 246 printf("src: %s ", ether_sprintf(eh->ether_shost)); 247 printf("type: 0x%x\n", eh->ether_type & 0xffff); 248 #endif 249 250 if (len < ETHER_MIN_LEN - ETHER_CRC_LEN) { 251 sendlen = ETHER_MIN_LEN - ETHER_CRC_LEN; 252 bzero(sc->sc_txbufp, sendlen); 253 } else 254 sendlen = len; 255 256 memcpy(sc->sc_txbufp, pkt, len); 257 258 rv = ub_dev_send(sc->sc_handle, sc->sc_txbufp, sendlen); 259 260 #if defined(NETIF_DEBUG) 261 printf("net_put: ub_send returned %d\n", rv); 262 #endif 263 if (rv == 0) 264 rv = len; 265 else 266 rv = -1; 267 268 return (rv); 269 } 270 271 static ssize_t 272 net_get(struct iodesc *desc, void **pkt, time_t timeout) 273 { 274 struct netif *nif = desc->io_netif; 275 struct uboot_softc *sc = nif->nif_devdata; 276 time_t t; 277 int err, rlen; 278 size_t len; 279 char *buf; 280 281 #if defined(NETIF_DEBUG) 282 printf("net_get: pkt %p, timeout %d\n", pkt, timeout); 283 #endif 284 t = getsecs(); 285 len = sizeof(sc->sc_rxbuf); 286 do { 287 err = ub_dev_recv(sc->sc_handle, sc->sc_rxbuf, len, &rlen); 288 289 if (err != 0) { 290 printf("net_get: ub_dev_recv() failed, error=%d\n", 291 err); 292 rlen = 0; 293 break; 294 } 295 } while ((rlen == -1 || rlen == 0) && (getsecs() - t < timeout)); 296 297 #if defined(NETIF_DEBUG) 298 printf("net_get: received len %d (%x)\n", rlen, rlen); 299 #endif 300 301 if (rlen > 0) { 302 buf = malloc(rlen + ETHER_ALIGN); 303 if (buf == NULL) 304 return (-1); 305 memcpy(buf + ETHER_ALIGN, sc->sc_rxbuf, rlen); 306 *pkt = buf; 307 return ((ssize_t)rlen); 308 } 309 310 return (-1); 311 } 312 313 static void 314 net_init(struct iodesc *desc, void *machdep_hint) 315 { 316 struct netif *nif = desc->io_netif; 317 struct uboot_softc *sc; 318 struct device_info *di; 319 int err; 320 321 sc = nif->nif_devdata = &uboot_softc; 322 323 if ((err = ub_dev_open(sc->sc_handle)) != 0) 324 panic("%s%d: initialisation failed with error %d", 325 nif->nif_driver->netif_bname, nif->nif_unit, err); 326 327 /* Get MAC address */ 328 di = ub_dev_get(sc->sc_handle); 329 memcpy(desc->myea, di->di_net.hwaddr, 6); 330 if (memcmp (desc->myea, "\0\0\0\0\0\0", 6) == 0) { 331 panic("%s%d: empty ethernet address!", 332 nif->nif_driver->netif_bname, nif->nif_unit); 333 } 334 335 /* Attempt to get netboot params from the u-boot env. */ 336 get_env_net_params(); 337 if (myip.s_addr != 0) 338 desc->myip = myip; 339 340 #if defined(NETIF_DEBUG) 341 printf("network: %s%d attached to %s\n", nif->nif_driver->netif_bname, 342 nif->nif_unit, ether_sprintf(desc->myea)); 343 #endif 344 345 /* Set correct alignment for TX packets */ 346 sc->sc_txbufp = sc->sc_txbuf; 347 if ((unsigned long)sc->sc_txbufp % PKTALIGN) 348 sc->sc_txbufp += PKTALIGN - 349 (unsigned long)sc->sc_txbufp % PKTALIGN; 350 } 351 352 static void 353 net_end(struct netif *nif) 354 { 355 struct uboot_softc *sc = nif->nif_devdata; 356 int err; 357 358 if ((err = ub_dev_close(sc->sc_handle)) != 0) 359 panic("%s%d: net_end failed with error %d", 360 nif->nif_driver->netif_bname, nif->nif_unit, err); 361 } 362