include/net.h

   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_8xx)
  16 #include <commproc.h>
  17 # if !defined(CONFIG_NET_MULTI)
  18 #  if defined(FEC_ENET) || defined(SCC_ENET)
  19 #   define CONFIG_NET_MULTI
  20 #  endif
  21 # endif
  22 #endif  /* CONFIG_8xx */
  23
  24 #if defined(CONFIG_MPC5xxx)
  25 # if !defined(CONFIG_NET_MULTI)
  26 #  if defined(CONFIG_MPC5xxx_FEC)
  27 #   define CONFIG_NET_MULTI
  28 #  endif
  29 # endif
  30 #endif  /* CONFIG_MPC5xxx */
  31
  32 #if !defined(CONFIG_NET_MULTI) && defined(CONFIG_CPM2)
  33 #include <config.h>
  34 #if defined(CONFIG_ETHER_ON_FCC)
  35 #if defined(CONFIG_ETHER_ON_SCC)
  36 #error "Ethernet not correctly defined"
  37 #endif /* CONFIG_ETHER_ON_SCC */
  38 #define CONFIG_NET_MULTI
  39 #if (CONFIG_ETHER_INDEX == 1)
  40 #define CONFIG_ETHER_ON_FCC1
  41 # define CFG_CMXFCR_MASK1       CFG_CMXFCR_MASK
  42 # define CFG_CMXFCR_VALUE1      CFG_CMXFCR_VALUE
  43 #elif (CONFIG_ETHER_INDEX == 2)
  44 #define CONFIG_ETHER_ON_FCC2
  45 # define CFG_CMXFCR_MASK2       CFG_CMXFCR_MASK
  46 # define CFG_CMXFCR_VALUE2      CFG_CMXFCR_VALUE
  47 #elif (CONFIG_ETHER_INDEX == 3)
  48 #define CONFIG_ETHER_ON_FCC3
  49 # define CFG_CMXFCR_MASK3       CFG_CMXFCR_MASK
  50 # define CFG_CMXFCR_VALUE3      CFG_CMXFCR_VALUE
  51 #endif /* CONFIG_ETHER_INDEX */
  52 #endif /* CONFIG_ETHER_ON_FCC */
  53 #endif /* !CONFIG_NET_MULTI && CONFIG_8260 */
  54
  55 #include <asm/byteorder.h>      /* for nton* / ntoh* stuff */
  56
  57
  58 /*
  59  *      The number of receive packet buffers, and the required packet buffer
  60  *      alignment in memory.
  61  *
  62  */
  63
  64 #ifdef CFG_RX_ETH_BUFFER
  65 # define PKTBUFSRX      CFG_RX_ETH_BUFFER
  66 #else
  67 # define PKTBUFSRX      4
  68 #endif
  69
  70 #define PKTALIGN        32
  71
  72 typedef ulong           IPaddr_t;
  73
  74
  75 /*
  76  * The current receive packet handler.  Called with a pointer to the
  77  * application packet, and a protocol type (PORT_BOOTPC or PORT_TFTP).
  78  * All other packets are dealt with without calling the handler.
  79  */
  80 typedef void    rxhand_f(uchar *, unsigned, unsigned, unsigned);
  81
  82 /*
  83  *      A timeout handler.  Called after time interval has expired.
  84  */
  85 typedef void    thand_f(void);
  86
  87 #define NAMESIZE 16
  88
  89 enum eth_state_t {
  90         ETH_STATE_INIT,
  91         ETH_STATE_PASSIVE,
  92         ETH_STATE_ACTIVE
  93 };
  94
  95 struct eth_device {
  96         char name[NAMESIZE];
  97         unsigned char enetaddr[6];
  98         int iobase;
  99         int state;
 100
 101         int  (*init) (struct eth_device*, bd_t*);
 102         int  (*send) (struct eth_device*, volatile void* pachet, int length);
 103         int  (*recv) (struct eth_device*);
 104         void (*halt) (struct eth_device*);
 105
 106         struct eth_device *next;
 107         void *priv;
 108 };
 109
 110 extern int eth_initialize(bd_t *bis);           /* Initialize network subsystem */
 111 extern int eth_register(struct eth_device* dev);/* Register network device      */
 112 extern void eth_try_another(int first_restart); /* Change the device            */
 113 #ifdef CONFIG_NET_MULTI
 114 extern void eth_set_current(void);              /* set nterface to ethcur var.  */
 115 #endif
 116 extern struct eth_device *eth_get_dev(void);    /* get the current device MAC   */
 117 extern int eth_get_dev_index (void);            /* get the device index         */
 118 extern void eth_set_enetaddr(int num, char* a); /* Set new MAC address          */
 119
 120 extern int eth_init(bd_t *bis);                 /* Initialize the device        */
 121 extern int eth_send(volatile void *packet, int length);    /* Send a packet     */
 122 extern int eth_rx(void);                        /* Check for received packets   */
 123 extern void eth_halt(void);                     /* stop SCC                     */
 124 extern char *eth_get_name(void);                /* get name of current device   */
 125
 126
 127 /**********************************************************************/
 128 /*
 129  *      Protocol headers.
 130  */
 131
 132 /*
 133  *      Ethernet header
 134  */
 135 typedef struct {
 136         uchar           et_dest[6];     /* Destination node             */
 137         uchar           et_src[6];      /* Source node                  */
 138         ushort          et_protlen;     /* Protocol or length           */
 139         uchar           et_dsap;        /* 802 DSAP                     */
 140         uchar           et_ssap;        /* 802 SSAP                     */
 141         uchar           et_ctl;         /* 802 control                  */
 142         uchar           et_snap1;       /* SNAP                         */
 143         uchar           et_snap2;
 144         uchar           et_snap3;
 145         ushort          et_prot;        /* 802 protocol                 */
 146 } Ethernet_t;
 147
 148 #define ETHER_HDR_SIZE  14              /* Ethernet header size         */
 149 #define E802_HDR_SIZE   22              /* 802 ethernet header size     */
 150
 151 /*
 152  *      Ethernet header
 153  */
 154 typedef struct {
 155         uchar           vet_dest[6];    /* Destination node             */
 156         uchar           vet_src[6];     /* Source node                  */
 157         ushort          vet_vlan_type;  /* PROT_VLAN                    */
 158         ushort          vet_tag;        /* TAG of VLAN                  */
 159         ushort          vet_type;       /* protocol type                */
 160 } VLAN_Ethernet_t;
 161
 162 #define VLAN_ETHER_HDR_SIZE     18      /* VLAN Ethernet header size    */
 163
 164 #define PROT_IP         0x0800          /* IP protocol                  */
 165 #define PROT_ARP        0x0806          /* IP ARP protocol              */
 166 #define PROT_RARP       0x8035          /* IP ARP protocol              */
 167 #define PROT_VLAN       0x8100          /* IEEE 802.1q protocol         */
 168
 169 #define IPPROTO_ICMP     1      /* Internet Control Message Protocol    */
 170 #define IPPROTO_UDP     17      /* User Datagram Protocol               */
 171
 172 /*
 173  *      Internet Protocol (IP) header.
 174  */
 175 typedef struct {
 176         uchar           ip_hl_v;        /* header length and version    */
 177         uchar           ip_tos;         /* type of service              */
 178         ushort          ip_len;         /* total length                 */
 179         ushort          ip_id;          /* identification               */
 180         ushort          ip_off;         /* fragment offset field        */
 181         uchar           ip_ttl;         /* time to live                 */
 182         uchar           ip_p;           /* protocol                     */
 183         ushort          ip_sum;         /* checksum                     */
 184         IPaddr_t        ip_src;         /* Source IP address            */
 185         IPaddr_t        ip_dst;         /* Destination IP address       */
 186         ushort          udp_src;        /* UDP source port              */
 187         ushort          udp_dst;        /* UDP destination port         */
 188         ushort          udp_len;        /* Length of UDP packet         */
 189         ushort          udp_xsum;       /* Checksum                     */
 190 } IP_t;
 191
 192 #define IP_HDR_SIZE_NO_UDP      (sizeof (IP_t) - 8)
 193 #define IP_HDR_SIZE             (sizeof (IP_t))
 194
 195
 196 /*
 197  *      Address Resolution Protocol (ARP) header.
 198  */
 199 typedef struct
 200 {
 201         ushort          ar_hrd;         /* Format of hardware address   */
 202 #   define ARP_ETHER        1           /* Ethernet  hardware address   */
 203         ushort          ar_pro;         /* Format of protocol address   */
 204         uchar           ar_hln;         /* Length of hardware address   */
 205         uchar           ar_pln;         /* Length of protocol address   */
 206         ushort          ar_op;          /* Operation                    */
 207 #   define ARPOP_REQUEST    1           /* Request  to resolve  address */
 208 #   define ARPOP_REPLY      2           /* Response to previous request */
 209
 210 #   define RARPOP_REQUEST   3           /* Request  to resolve  address */
 211 #   define RARPOP_REPLY     4           /* Response to previous request */
 212
 213         /*
 214          * The remaining fields are variable in size, according to
 215          * the sizes above, and are defined as appropriate for
 216          * specific hardware/protocol combinations.
 217          */
 218         uchar           ar_data[0];
 219 #if 0
 220         uchar           ar_sha[];       /* Sender hardware address      */
 221         uchar           ar_spa[];       /* Sender protocol address      */
 222         uchar           ar_tha[];       /* Target hardware address      */
 223         uchar           ar_tpa[];       /* Target protocol address      */
 224 #endif /* 0 */
 225 } ARP_t;
 226
 227 #define ARP_HDR_SIZE    (8+20)          /* Size assuming ethernet       */
 228
 229 /*
 230  * ICMP stuff (just enough to handle (host) redirect messages)
 231  */
 232 #define ICMP_ECHO_REPLY         0       /* Echo reply                   */
 233 #define ICMP_REDIRECT           5       /* Redirect (change route)      */
 234 #define ICMP_ECHO_REQUEST       8       /* Echo request                 */
 235
 236 /* Codes for REDIRECT. */
 237 #define ICMP_REDIR_NET          0       /* Redirect Net                 */
 238 #define ICMP_REDIR_HOST         1       /* Redirect Host                */
 239
 240 typedef struct icmphdr {
 241         uchar           type;
 242         uchar           code;
 243         ushort          checksum;
 244         union {
 245                 struct {
 246                         ushort  id;
 247                         ushort  sequence;
 248                 } echo;
 249                 ulong   gateway;
 250                 struct {
 251                         ushort  __unused;
 252                         ushort  mtu;
 253                 } frag;
 254         } un;
 255 } ICMP_t;
 256
 257
 258 /*
 259  * Maximum packet size; used to allocate packet storage.
 260  * TFTP packets can be 524 bytes + IP header + ethernet header.
 261  * Lets be conservative, and go for 38 * 16.  (Must also be
 262  * a multiple of 32 bytes).
 263  */
 264 /*
 265  * AS.HARNOIS : Better to set PKTSIZE to maximum size because
 266  * traffic type is not always controlled
 267  * maximum packet size =  1518
 268  * maximum packet size and multiple of 32 bytes =  1536
 269  */
 270 #define PKTSIZE                 1518
 271 #define PKTSIZE_ALIGN           1536
 272 /*#define PKTSIZE               608*/
 273
 274 /*
 275  * Maximum receive ring size; that is, the number of packets
 276  * we can buffer before overflow happens. Basically, this just
 277  * needs to be enough to prevent a packet being discarded while
 278  * we are processing the previous one.
 279  */
 280 #define RINGSZ          4
 281 #define RINGSZ_LOG2     2
 282
 283 /**********************************************************************/
 284 /*
 285  *      Globals.
 286  *
 287  * Note:
 288  *
 289  * All variables of type IPaddr_t are stored in NETWORK byte order
 290  * (big endian).
 291  */
 292
 293 /* net.c */
 294 /** BOOTP EXTENTIONS **/
 295 extern IPaddr_t         NetOurGatewayIP;        /* Our gateway IP addresse      */
 296 extern IPaddr_t         NetOurSubnetMask;       /* Our subnet mask (0 = unknown)*/
 297 extern IPaddr_t         NetOurDNSIP;     /* Our Domain Name Server (0 = unknown)*/
 298 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_DNS2)
 299 extern IPaddr_t         NetOurDNS2IP;    /* Our 2nd Domain Name Server (0 = unknown)*/
 300 #endif
 301 extern char             NetOurNISDomain[32];    /* Our NIS domain               */
 302 extern char             NetOurHostName[32];     /* Our hostname                 */
 303 extern char             NetOurRootPath[64];     /* Our root path                */
 304 extern ushort           NetBootFileSize;        /* Our boot file size in blocks */
 305 /** END OF BOOTP EXTENTIONS **/
 306 extern ulong            NetBootFileXferSize;    /* size of bootfile in bytes    */
 307 extern uchar            NetOurEther[6];         /* Our ethernet address         */
 308 extern uchar            NetServerEther[6];      /* Boot server enet address     */
 309 extern IPaddr_t         NetOurIP;               /* Our    IP addr (0 = unknown) */
 310 extern IPaddr_t         NetServerIP;            /* Server IP addr (0 = unknown) */
 311 extern volatile uchar * NetTxPacket;            /* THE transmit packet          */
 312 extern volatile uchar * NetRxPackets[PKTBUFSRX];/* Receive packets              */
 313 extern volatile uchar * NetRxPkt;               /* Current receive packet       */
 314 extern int              NetRxPktLen;            /* Current rx packet length     */
 315 extern unsigned         NetIPID;                /* IP ID (counting)             */
 316 extern uchar            NetBcastAddr[6];        /* Ethernet boardcast address   */
 317 extern uchar            NetEtherNullAddr[6];
 318
 319 #define VLAN_NONE       4095                    /* untagged                     */
 320 #define VLAN_IDMASK     0x0fff                  /* mask of valid vlan id        */
 321 extern ushort           NetOurVLAN;             /* Our VLAN                     */
 322 extern ushort           NetOurNativeVLAN;       /* Our Native VLAN              */
 323
 324 extern uchar            NetCDPAddr[6];          /* Ethernet CDP address         */
 325 extern ushort           CDPNativeVLAN;          /* CDP returned native VLAN     */
 326 extern ushort           CDPApplianceVLAN;       /* CDP returned appliance VLAN  */
 327
 328 extern int              NetState;               /* Network loop state           */
 329 #define NETLOOP_CONTINUE        1
 330 #define NETLOOP_RESTART         2
 331 #define NETLOOP_SUCCESS         3
 332 #define NETLOOP_FAIL            4
 333
 334 #ifdef CONFIG_NET_MULTI
 335 extern int              NetRestartWrap;         /* Tried all network devices    */
 336 #endif
 337
 338 typedef enum { BOOTP, RARP, ARP, TFTP, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP } proto_t;
 339
 340 /* from net/net.c */
 341 extern char     BootFile[128];                  /* Boot File name               */
 342
 343 #if (CONFIG_COMMANDS & CFG_CMD_PING)
 344 extern IPaddr_t NetPingIP;                      /* the ip address to ping               */
 345 #endif
 346
 347 #if (CONFIG_COMMANDS & CFG_CMD_CDP)
 348 /* when CDP completes these hold the return values */
 349 extern ushort CDPNativeVLAN;
 350 extern ushort CDPApplianceVLAN;
 351 #endif
 352
 353 #if (CONFIG_COMMANDS & CFG_CMD_SNTP)
 354 extern IPaddr_t NetNtpServerIP;                 /* the ip address to NTP        */
 355 extern int NetTimeOffset;                       /* offset time from UTC         */
 356 #endif
 357
 358 /* Initialize the network adapter */
 359 extern int      NetLoop(proto_t);
 360
 361 /* Shutdown adapters and cleanup */
 362 extern void     NetStop(void);
 363
 364 /* Load failed.  Start again. */
 365 extern void     NetStartAgain(void);
 366
 367 /* Get size of the ethernet header when we send */
 368 extern int      NetEthHdrSize(void);
 369
 370 /* Set ethernet header; returns the size of the header */
 371 extern int      NetSetEther(volatile uchar *, uchar *, uint);
 372
 373 /* Set IP header */
 374 extern void     NetSetIP(volatile uchar *, IPaddr_t, int, int, int);
 375
 376 /* Checksum */
 377 extern int      NetCksumOk(uchar *, int);       /* Return true if cksum OK      */
 378 extern uint     NetCksum(uchar *, int);         /* Calculate the checksum       */
 379
 380 /* Set callbacks */
 381 extern void     NetSetHandler(rxhand_f *);      /* Set RX packet handler        */
 382 extern void     NetSetTimeout(ulong, thand_f *);/* Set timeout handler          */
 383
 384 /* Transmit "NetTxPacket" */
 385 extern void     NetSendPacket(volatile uchar *, int);
 386
 387 /* Transmit UDP packet, performing ARP request if needed */
 388 extern int      NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len);
 389
 390 /* Processes a received packet */
 391 extern void     NetReceive(volatile uchar *, int);
 392
 393 /* Print an IP address on the console */
 394 extern void     print_IPaddr (IPaddr_t);
 395
 396 /*
 397  * The following functions are a bit ugly, but necessary to deal with
 398  * alignment restrictions on ARM.
 399  *
 400  * We're using inline functions, which had the smallest memory
 401  * footprint in our tests.
 402  */
 403 /* return IP *in network byteorder* */
 404 static inline IPaddr_t NetReadIP(void *from)
 405 {
 406         IPaddr_t ip;
 407         memcpy((void*)&ip, from, sizeof(ip));
 408         return ip;
 409 }
 410
 411 /* return ulong *in network byteorder* */
 412 static inline ulong NetReadLong(ulong *from)
 413 {
 414         ulong l;
 415         memcpy((void*)&l, (void*)from, sizeof(l));
 416         return l;
 417 }
 418
 419 /* write IP *in network byteorder* */
 420 static inline void NetWriteIP(void *to, IPaddr_t ip)
 421 {
 422         memcpy(to, (void*)&ip, sizeof(ip));
 423 }
 424
 425 /* copy IP */
 426 static inline void NetCopyIP(void *to, void *from)
 427 {
 428         memcpy(to, from, sizeof(IPaddr_t));
 429 }
 430
 431 /* copy ulong */
 432 static inline void NetCopyLong(ulong *to, ulong *from)
 433 {
 434         memcpy((void*)to, (void*)from, sizeof(ulong));
 435 }
 436
 437 /* Convert an IP address to a string */
 438 extern void     ip_to_string (IPaddr_t x, char *s);
 439
 440 /* Convert a string to ip address */
 441 extern IPaddr_t string_to_ip(char *s);
 442
 443 /* Convert a VLAN id to a string */
 444 extern void     VLAN_to_string (ushort x, char *s);
 445
 446 /* Convert a string to a vlan id */
 447 extern ushort string_to_VLAN(char *s);
 448
 449 /* read an IP address from a environment variable */
 450 extern IPaddr_t getenv_IPaddr (char *);
 451
 452 /* read a VLAN id from an environment variable */
 453 extern ushort getenv_VLAN(char *);
 454
 455 /* copy a filename (allow for "..." notation, limit length) */
 456 extern void     copy_filename (char *dst, char *src, int size);
 457
 458 /**********************************************************************/
 459
 460 #endif /* __NET_H__ */