1 /* 2 * LiMon Monitor (LiMon) - Network. 3 * 4 * Copyright 1994 - 2000 Neil Russell. 5 * (See License) 6 * 7 * 8 * History 9 * 9/16/00 bor adapted to TQM823L/STK8xxL board, RARP/TFTP boot added 10 */ 11 12 #ifndef __NET_H__ 13 #define __NET_H__ 14 15 #if !defined(CONFIG_NET_MULTI) && defined(CONFIG_8xx) 16 #include <commproc.h> 17 #if defined(FEC_ENET) || defined(SCC_ENET) 18 #define CONFIG_NET_MULTI 19 #endif 20 #endif 21 22 #if !defined(CONFIG_NET_MULTI) && defined(CONFIG_8260) 23 #include <config.h> 24 #if defined(CONFIG_ETHER_ON_FCC) 25 #if defined(CONFIG_ETHER_ON_SCC) 26 #error "Ethernet not correctly defined" 27 #endif /* CONFIG_ETHER_ON_SCC */ 28 #define CONFIG_NET_MULTI 29 #if (CONFIG_ETHER_INDEX == 1) 30 #define CONFIG_ETHER_ON_FCC1 31 # define CFG_CMXFCR_MASK1 CFG_CMXFCR_MASK 32 # define CFG_CMXFCR_VALUE1 CFG_CMXFCR_VALUE 33 #elif (CONFIG_ETHER_INDEX == 2) 34 #define CONFIG_ETHER_ON_FCC2 35 # define CFG_CMXFCR_MASK2 CFG_CMXFCR_MASK 36 # define CFG_CMXFCR_VALUE2 CFG_CMXFCR_VALUE 37 #elif (CONFIG_ETHER_INDEX == 3) 38 #define CONFIG_ETHER_ON_FCC3 39 # define CFG_CMXFCR_MASK3 CFG_CMXFCR_MASK 40 # define CFG_CMXFCR_VALUE3 CFG_CMXFCR_VALUE 41 #endif /* CONFIG_ETHER_INDEX */ 42 #endif /* CONFIG_ETHER_ON_FCC */ 43 #endif /* !CONFIG_NET_MULTI && CONFIG_8260 */ 44 45 #include <asm/byteorder.h> /* for nton* / ntoh* stuff */ 46 47 48 /* 49 * The number of receive packet buffers, and the required packet buffer 50 * alignment in memory. 51 * 52 */ 53 54 #ifdef CFG_RX_ETH_BUFFER 55 # define PKTBUFSRX CFG_RX_ETH_BUFFER 56 #else 57 # define PKTBUFSRX 4 58 #endif 59 60 #define PKTALIGN 32 61 62 typedef ulong IPaddr_t; 63 64 65 66 /* 67 * The current receive packet handler. Called with a pointer to the 68 * application packet, and a protocol type (PORT_BOOTPC or PORT_TFTP). 69 * All other packets are dealt with without calling the handler. 70 */ 71 typedef void rxhand_f(uchar *, unsigned, unsigned, unsigned); 72 73 /* 74 * A timeout handler. Called after time interval has expired. 75 */ 76 typedef void thand_f(void); 77 78 #define NAMESIZE 16 79 80 enum eth_state_t { 81 ETH_STATE_INIT, 82 ETH_STATE_PASSIVE, 83 ETH_STATE_ACTIVE 84 }; 85 86 struct eth_device { 87 char name[NAMESIZE]; 88 unsigned char enetaddr[6]; 89 int iobase; 90 int state; 91 92 int (*init) (struct eth_device*, bd_t*); 93 int (*send) (struct eth_device*, volatile void* pachet, int length); 94 int (*recv) (struct eth_device*); 95 void (*halt) (struct eth_device*); 96 97 struct eth_device *next; 98 void *priv; 99 }; 100 101 extern int eth_initialize(bd_t *bis); /* Initialize network subsystem */ 102 extern int eth_register(struct eth_device* dev);/* Register network device */ 103 extern void eth_try_another(int first_restart); /* Change the device */ 104 extern struct eth_device *eth_get_dev(void); /* get the current device MAC */ 105 extern void eth_set_enetaddr(int num, char* a); /* Set new MAC address */ 106 107 extern int eth_init(bd_t *bis); /* Initialize the device */ 108 extern int eth_send(volatile void *packet, int length); /* Send a packet */ 109 extern int eth_rx(void); /* Check for received packets */ 110 extern void eth_halt(void); /* stop SCC */ 111 112 113 /**********************************************************************/ 114 /* 115 * Protocol headers. 116 */ 117 118 /* 119 * Ethernet header 120 */ 121 typedef struct { 122 uchar et_dest[6]; /* Destination node */ 123 uchar et_src[6]; /* Source node */ 124 ushort et_protlen; /* Protocol or length */ 125 uchar et_dsap; /* 802 DSAP */ 126 uchar et_ssap; /* 802 SSAP */ 127 uchar et_ctl; /* 802 control */ 128 uchar et_snap1; /* SNAP */ 129 uchar et_snap2; 130 uchar et_snap3; 131 ushort et_prot; /* 802 protocol */ 132 } Ethernet_t; 133 134 #define ETHER_HDR_SIZE 14 /* Ethernet header size */ 135 #define E802_HDR_SIZE 22 /* 802 ethernet header size */ 136 #define PROT_IP 0x0800 /* IP protocol */ 137 #define PROT_ARP 0x0806 /* IP ARP protocol */ 138 #define PROT_RARP 0x8035 /* IP ARP protocol */ 139 140 #define IPPROTO_ICMP 1 /* Internet Control Message Protocol */ 141 #define IPPROTO_UDP 17 /* User Datagram Protocol */ 142 143 /* 144 * Internet Protocol (IP) header. 145 */ 146 typedef struct { 147 uchar ip_hl_v; /* header length and version */ 148 uchar ip_tos; /* type of service */ 149 ushort ip_len; /* total length */ 150 ushort ip_id; /* identification */ 151 ushort ip_off; /* fragment offset field */ 152 uchar ip_ttl; /* time to live */ 153 uchar ip_p; /* protocol */ 154 ushort ip_sum; /* checksum */ 155 IPaddr_t ip_src; /* Source IP address */ 156 IPaddr_t ip_dst; /* Destination IP address */ 157 ushort udp_src; /* UDP source port */ 158 ushort udp_dst; /* UDP destination port */ 159 ushort udp_len; /* Length of UDP packet */ 160 ushort udp_xsum; /* Checksum */ 161 } IP_t; 162 163 #define IP_HDR_SIZE_NO_UDP (sizeof (IP_t) - 8) 164 #define IP_HDR_SIZE (sizeof (IP_t)) 165 166 167 /* 168 * Address Resolution Protocol (ARP) header. 169 */ 170 typedef struct 171 { 172 ushort ar_hrd; /* Format of hardware address */ 173 # define ARP_ETHER 1 /* Ethernet hardware address */ 174 ushort ar_pro; /* Format of protocol address */ 175 uchar ar_hln; /* Length of hardware address */ 176 uchar ar_pln; /* Length of protocol address */ 177 ushort ar_op; /* Operation */ 178 # define ARPOP_REQUEST 1 /* Request to resolve address */ 179 # define ARPOP_REPLY 2 /* Response to previous request */ 180 181 # define RARPOP_REQUEST 3 /* Request to resolve address */ 182 # define RARPOP_REPLY 4 /* Response to previous request */ 183 184 /* 185 * The remaining fields are variable in size, according to 186 * the sizes above, and are defined as appropriate for 187 * specific hardware/protocol combinations. 188 */ 189 uchar ar_data[0]; 190 #if 0 191 uchar ar_sha[]; /* Sender hardware address */ 192 uchar ar_spa[]; /* Sender protocol address */ 193 uchar ar_tha[]; /* Target hardware address */ 194 uchar ar_tpa[]; /* Target protocol address */ 195 #endif /* 0 */ 196 } ARP_t; 197 198 #define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */ 199 200 /* 201 * ICMP stuff (just enough to handle (host) redirect messages) 202 */ 203 #define ICMP_REDIRECT 5 /* Redirect (change route) */ 204 205 /* Codes for REDIRECT. */ 206 #define ICMP_REDIR_NET 0 /* Redirect Net */ 207 #define ICMP_REDIR_HOST 1 /* Redirect Host */ 208 209 typedef struct icmphdr { 210 uchar type; 211 uchar code; 212 ushort checksum; 213 union { 214 struct { 215 ushort id; 216 ushort sequence; 217 } echo; 218 ulong gateway; 219 struct { 220 ushort __unused; 221 ushort mtu; 222 } frag; 223 } un; 224 } ICMP_t; 225 226 227 228 /* 229 * Maximum packet size; used to allocate packet storage. 230 * TFTP packets can be 524 bytes + IP header + ethernet header. 231 * Lets be conservative, and go for 38 * 16. (Must also be 232 * a multiple of 32 bytes). 233 */ 234 /* 235 * AS.HARNOIS : Better to set PKTSIZE to maximum size because 236 * traffic type is not always controlled 237 * maximum packet size = 1518 238 * maximum packet size and multiple of 32 bytes = 1536 239 */ 240 #define PKTSIZE 1518 241 #define PKTSIZE_ALIGN 1536 242 /*#define PKTSIZE 608*/ 243 244 /* 245 * Maximum receive ring size; that is, the number of packets 246 * we can buffer before overflow happens. Basically, this just 247 * needs to be enough to prevent a packet being discarded while 248 * we are processing the previous one. 249 */ 250 #define RINGSZ 4 251 #define RINGSZ_LOG2 2 252 253 /**********************************************************************/ 254 /* 255 * Globals. 256 * 257 * Note: 258 * 259 * All variables of type IPaddr_t are stored in NETWORK byte order 260 * (big endian). 261 */ 262 263 /* net.c */ 264 /** BOOTP EXTENTIONS **/ 265 extern IPaddr_t NetOurGatewayIP; /* Our gateway IP addresse */ 266 extern IPaddr_t NetOurSubnetMask; /* Our subnet mask (0 = unknown)*/ 267 extern IPaddr_t NetOurDNSIP; /* Our Domain Name Server (0 = unknown)*/ 268 extern char NetOurNISDomain[32]; /* Our NIS domain */ 269 extern char NetOurHostName[32]; /* Our hostname */ 270 extern char NetOurRootPath[64]; /* Our root path */ 271 extern ushort NetBootFileSize; /* Our boot file size in blocks */ 272 /** END OF BOOTP EXTENTIONS **/ 273 extern ulong NetBootFileXferSize; /* size of bootfile in bytes */ 274 extern uchar NetOurEther[6]; /* Our ethernet address */ 275 extern uchar NetServerEther[6]; /* Boot server enet address */ 276 extern IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */ 277 extern IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */ 278 extern volatile uchar * NetTxPacket; /* THE transmit packet */ 279 extern volatile uchar * NetRxPackets[PKTBUFSRX];/* Receive packets */ 280 extern volatile uchar * NetRxPkt; /* Current receive packet */ 281 extern int NetRxPktLen; /* Current rx packet length */ 282 extern unsigned NetIPID; /* IP ID (counting) */ 283 extern uchar NetBcastAddr[6]; /* Ethernet boardcast address */ 284 285 extern int NetState; /* Network loop state */ 286 #define NETLOOP_CONTINUE 1 287 #define NETLOOP_RESTART 2 288 #define NETLOOP_SUCCESS 3 289 #define NETLOOP_FAIL 4 290 291 #ifdef CONFIG_NET_MULTI 292 extern int NetRestartWrap; /* Tried all network devices */ 293 #endif 294 295 typedef enum { BOOTP, RARP, ARP, TFTP, DHCP } proto_t; 296 297 /* from net/net.c */ 298 extern char BootFile[128]; /* Boot File name */ 299 300 /* Initialize the network adapter */ 301 extern int NetLoop(proto_t); 302 303 /* Shutdown adapters and cleanup */ 304 extern void NetStop(void); 305 306 /* Load failed. Start again. */ 307 extern void NetStartAgain(void); 308 309 /* Set ethernet header */ 310 extern void NetSetEther(volatile uchar *, uchar *, uint); 311 312 /* Set IP header */ 313 extern void NetSetIP(volatile uchar *, IPaddr_t, int, int, int); 314 315 /* Checksum */ 316 extern int NetCksumOk(uchar *, int); /* Return true if cksum OK */ 317 extern uint NetCksum(uchar *, int); /* Calculate the checksum */ 318 319 /* Set callbacks */ 320 extern void NetSetHandler(rxhand_f *); /* Set RX packet handler */ 321 extern void NetSetTimeout(int, thand_f *); /* Set timeout handler */ 322 323 /* Transmit "NetTxPacket" */ 324 extern void NetSendPacket(volatile uchar *, int); 325 326 /* Processes a received packet */ 327 extern void NetReceive(volatile uchar *, int); 328 329 /* Print an IP address on the console */ 330 extern void print_IPaddr (IPaddr_t); 331 332 /* 333 * The following functions are a bit ugly, but necessary to deal with 334 * alignment restrictions on ARM. 335 * 336 * We're using inline functions, which had the smallest memory 337 * footprint in our tests. 338 */ 339 /* return IP *in network byteorder* */ 340 static inline IPaddr_t NetReadIP(void *from) 341 { 342 IPaddr_t ip; 343 memcpy((void*)&ip, from, sizeof(ip)); 344 return ip; 345 } 346 347 /* return ulong *in network byteorder* */ 348 static inline ulong NetReadLong(ulong *from) 349 { 350 ulong l; 351 memcpy((void*)&l, (void*)from, sizeof(l)); 352 return l; 353 } 354 355 /* write IP *in network byteorder* */ 356 static inline void NetWriteIP(void *to, IPaddr_t ip) 357 { 358 memcpy(to, (void*)&ip, sizeof(ip)); 359 } 360 361 /* copy IP */ 362 static inline void NetCopyIP(void *to, void *from) 363 { 364 memcpy(to, from, sizeof(IPaddr_t)); 365 } 366 367 /* copy ulong */ 368 static inline void NetCopyLong(ulong *to, ulong *from) 369 { 370 memcpy((void*)to, (void*)from, sizeof(ulong)); 371 } 372 373 /* Convert an IP address to a string */ 374 extern void ip_to_string (IPaddr_t x, char *s); 375 376 /* read an IP address from a environment variable */ 377 extern IPaddr_t getenv_IPaddr (char *); 378 379 /* copy a filename (allow for "..." notation, limit length) */ 380 extern void copy_filename (uchar *dst, uchar *src, int size); 381 382 /**********************************************************************/ 383 384 #endif /* __NET_H__ */ 385