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/cdefs.h> 29 #include <sys/param.h> 30 #include <sys/types.h> 31 #include <sys/socket.h> 32 33 #include <net/if.h> 34 #include <netinet/in.h> 35 #include <netinet/in_systm.h> 36 #include <netinet/if_ether.h> 37 #include <netinet/ip.h> 38 39 #include <stand.h> 40 #include <net.h> 41 #include <netif.h> 42 43 #include "api_public.h" 44 #include "glue.h" 45 #include "libuboot.h" 46 #include "dev_net.h" 47 48 static int net_probe(struct netif *, void *); 49 static int net_match(struct netif *, void *); 50 static void net_init(struct iodesc *, void *); 51 static ssize_t net_get(struct iodesc *, void **, time_t); 52 static ssize_t net_put(struct iodesc *, void *, size_t); 53 static void net_end(struct netif *); 54 55 extern struct netif_stats net_stats[]; 56 57 struct netif_dif net_ifs[] = { 58 /* dif_unit dif_nsel dif_stats dif_private */ 59 { 0, 1, &net_stats[0], 0, }, 60 }; 61 62 struct netif_stats net_stats[nitems(net_ifs)]; 63 64 struct netif_driver uboot_net = { 65 "uboot_eth", /* netif_bname */ 66 net_match, /* netif_match */ 67 net_probe, /* netif_probe */ 68 net_init, /* netif_init */ 69 net_get, /* netif_get */ 70 net_put, /* netif_put */ 71 net_end, /* netif_end */ 72 net_ifs, /* netif_ifs */ 73 nitems(net_ifs) /* netif_nifs */ 74 }; 75 76 struct uboot_softc { 77 uint32_t sc_pad; 78 uint8_t sc_rxbuf[ETHER_MAX_LEN]; 79 uint8_t sc_txbuf[ETHER_MAX_LEN + PKTALIGN]; 80 uint8_t *sc_txbufp; 81 int sc_handle; /* device handle for ub_dev_xxx */ 82 }; 83 84 static struct uboot_softc uboot_softc; 85 86 /* 87 * get_env_net_params() 88 * 89 * Attempt to obtain all the parms we need for netbooting from the U-Boot 90 * environment. If we fail to obtain the values it may still be possible to 91 * netboot; the net_dev code will attempt to get the values from bootp, rarp, 92 * and other such sources. 93 * 94 * If rootip.s_addr is non-zero net_dev assumes the required global variables 95 * are set and skips the bootp inquiry. For that reason, we don't set rootip 96 * until we've verified that we have at least the minimum required info. 97 * 98 * This is called from netif_init() which can result in it getting called 99 * multiple times, by design. The network code at higher layers zeroes out 100 * rootip when it closes a network interface, so if it gets opened again we have 101 * to obtain all this info again. 102 */ 103 static void 104 get_env_net_params() 105 { 106 char *envstr; 107 in_addr_t rootaddr, serveraddr; 108 109 /* 110 * Silently get out right away if we don't have rootpath, because none 111 * of the other info we obtain below is sufficient to boot without it. 112 * 113 * If we do have rootpath, copy it into the global var and also set 114 * dhcp.root-path in the env. If we don't get all the other info from 115 * the u-boot env below, we will still try dhcp/bootp, but the server- 116 * provided path will not replace the user-provided value we set here. 117 */ 118 if ((envstr = ub_env_get("rootpath")) == NULL) 119 return; 120 strlcpy(rootpath, envstr, sizeof(rootpath)); 121 setenv("dhcp.root-path", rootpath, 0); 122 123 /* 124 * Our own IP address must be valid. Silently get out if it's not set, 125 * but whine if it's there and we can't parse it. 126 */ 127 if ((envstr = ub_env_get("ipaddr")) == NULL) 128 return; 129 if ((myip.s_addr = inet_addr(envstr)) == INADDR_NONE) { 130 printf("Could not parse ipaddr '%s'\n", envstr); 131 return; 132 } 133 134 /* 135 * Netmask is optional, default to the "natural" netmask for our IP, but 136 * whine if it was provided and we couldn't parse it. 137 */ 138 if ((envstr = ub_env_get("netmask")) != NULL && 139 (netmask = inet_addr(envstr)) == INADDR_NONE) { 140 printf("Could not parse netmask '%s'\n", envstr); 141 } 142 if (netmask == INADDR_NONE) { 143 if (IN_CLASSA(myip.s_addr)) 144 netmask = IN_CLASSA_NET; 145 else if (IN_CLASSB(myip.s_addr)) 146 netmask = IN_CLASSB_NET; 147 else 148 netmask = IN_CLASSC_NET; 149 } 150 151 /* 152 * Get optional serverip before rootpath; the latter can override it. 153 * Whine only if it's present but can't be parsed. 154 */ 155 serveraddr = INADDR_NONE; 156 if ((envstr = ub_env_get("serverip")) != NULL) { 157 if ((serveraddr = inet_addr(envstr)) == INADDR_NONE) 158 printf("Could not parse serverip '%s'\n", envstr); 159 } 160 161 /* 162 * There must be a rootpath. It may be ip:/path or it may be just the 163 * path in which case the ip needs to be in serverip. 164 */ 165 rootaddr = net_parse_rootpath(); 166 if (rootaddr == INADDR_NONE) 167 rootaddr = serveraddr; 168 if (rootaddr == INADDR_NONE) { 169 printf("No server address for rootpath '%s'\n", envstr); 170 return; 171 } 172 rootip.s_addr = rootaddr; 173 174 /* 175 * Gateway IP is optional unless rootip is on a different net in which 176 * case whine if it's missing or we can't parse it, and set rootip addr 177 * to zero, which signals to other network code that network params 178 * aren't set (so it will try dhcp, bootp, etc). 179 */ 180 envstr = ub_env_get("gatewayip"); 181 if (!SAMENET(myip, rootip, netmask)) { 182 if (envstr == NULL) { 183 printf("Need gatewayip for a root server on a " 184 "different network.\n"); 185 rootip.s_addr = 0; 186 return; 187 } 188 if ((gateip.s_addr = inet_addr(envstr)) == INADDR_NONE) { 189 printf("Could not parse gatewayip '%s'\n", envstr); 190 rootip.s_addr = 0; 191 return; 192 } 193 } 194 } 195 196 static int 197 net_match(struct netif *nif, void *machdep_hint) 198 { 199 char **a = (char **)machdep_hint; 200 201 if (memcmp("net", *a, 3) == 0) 202 return (1); 203 204 printf("net_match: could not match network device\n"); 205 return (0); 206 } 207 208 static int 209 net_probe(struct netif *nif, void *machdep_hint) 210 { 211 struct device_info *di; 212 int i; 213 214 for (i = 0; i < devs_no; i++) 215 if ((di = ub_dev_get(i)) != NULL) 216 if (di->type == DEV_TYP_NET) 217 break; 218 219 if (i == devs_no) { 220 printf("net_probe: no network devices found, maybe not" 221 " enumerated yet..?\n"); 222 return (-1); 223 } 224 225 #if defined(NETIF_DEBUG) 226 printf("net_probe: network device found: %d\n", i); 227 #endif 228 uboot_softc.sc_handle = i; 229 230 return (0); 231 } 232 233 static ssize_t 234 net_put(struct iodesc *desc, void *pkt, size_t len) 235 { 236 struct netif *nif = desc->io_netif; 237 struct uboot_softc *sc = nif->nif_devdata; 238 size_t sendlen; 239 ssize_t rv; 240 241 #if defined(NETIF_DEBUG) 242 struct ether_header *eh; 243 244 printf("net_put: desc %p, pkt %p, len %d\n", desc, pkt, len); 245 eh = pkt; 246 printf("dst: %s ", ether_sprintf(eh->ether_dhost)); 247 printf("src: %s ", ether_sprintf(eh->ether_shost)); 248 printf("type: 0x%x\n", eh->ether_type & 0xffff); 249 #endif 250 251 if (len < ETHER_MIN_LEN - ETHER_CRC_LEN) { 252 sendlen = ETHER_MIN_LEN - ETHER_CRC_LEN; 253 bzero(sc->sc_txbufp, sendlen); 254 } else 255 sendlen = len; 256 257 memcpy(sc->sc_txbufp, pkt, len); 258 259 rv = ub_dev_send(sc->sc_handle, sc->sc_txbufp, sendlen); 260 261 #if defined(NETIF_DEBUG) 262 printf("net_put: ub_send returned %d\n", rv); 263 #endif 264 if (rv == 0) 265 rv = len; 266 else 267 rv = -1; 268 269 return (rv); 270 } 271 272 static ssize_t 273 net_get(struct iodesc *desc, void **pkt, time_t timeout) 274 { 275 struct netif *nif = desc->io_netif; 276 struct uboot_softc *sc = nif->nif_devdata; 277 time_t t; 278 int err, rlen; 279 size_t len; 280 char *buf; 281 282 #if defined(NETIF_DEBUG) 283 printf("net_get: pkt %p, timeout %d\n", pkt, timeout); 284 #endif 285 t = getsecs(); 286 len = sizeof(sc->sc_rxbuf); 287 do { 288 err = ub_dev_recv(sc->sc_handle, sc->sc_rxbuf, len, &rlen); 289 290 if (err != 0) { 291 printf("net_get: ub_dev_recv() failed, error=%d\n", 292 err); 293 rlen = 0; 294 break; 295 } 296 } while ((rlen == -1 || rlen == 0) && (getsecs() - t < timeout)); 297 298 #if defined(NETIF_DEBUG) 299 printf("net_get: received len %d (%x)\n", rlen, rlen); 300 #endif 301 302 if (rlen > 0) { 303 buf = malloc(rlen + ETHER_ALIGN); 304 if (buf == NULL) 305 return (-1); 306 memcpy(buf + ETHER_ALIGN, sc->sc_rxbuf, rlen); 307 *pkt = buf; 308 return ((ssize_t)rlen); 309 } 310 311 return (-1); 312 } 313 314 static void 315 net_init(struct iodesc *desc, void *machdep_hint) 316 { 317 struct netif *nif = desc->io_netif; 318 struct uboot_softc *sc; 319 struct device_info *di; 320 int err; 321 322 sc = nif->nif_devdata = &uboot_softc; 323 324 if ((err = ub_dev_open(sc->sc_handle)) != 0) 325 panic("%s%d: initialisation failed with error %d", 326 nif->nif_driver->netif_bname, nif->nif_unit, err); 327 328 /* Get MAC address */ 329 di = ub_dev_get(sc->sc_handle); 330 memcpy(desc->myea, di->di_net.hwaddr, 6); 331 if (memcmp (desc->myea, "\0\0\0\0\0\0", 6) == 0) { 332 panic("%s%d: empty ethernet address!", 333 nif->nif_driver->netif_bname, nif->nif_unit); 334 } 335 336 /* Attempt to get netboot params from the u-boot env. */ 337 get_env_net_params(); 338 if (myip.s_addr != 0) 339 desc->myip = myip; 340 341 #if defined(NETIF_DEBUG) 342 printf("network: %s%d attached to %s\n", nif->nif_driver->netif_bname, 343 nif->nif_unit, ether_sprintf(desc->myea)); 344 #endif 345 346 /* Set correct alignment for TX packets */ 347 sc->sc_txbufp = sc->sc_txbuf; 348 if ((unsigned long)sc->sc_txbufp % PKTALIGN) 349 sc->sc_txbufp += PKTALIGN - 350 (unsigned long)sc->sc_txbufp % PKTALIGN; 351 } 352 353 static void 354 net_end(struct netif *nif) 355 { 356 struct uboot_softc *sc = nif->nif_devdata; 357 int err; 358 359 if ((err = ub_dev_close(sc->sc_handle)) != 0) 360 panic("%s%d: net_end failed with error %d", 361 nif->nif_driver->netif_bname, nif->nif_unit, err); 362 } 363