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u-boot-megous/include/net.h
Michael Walle fea7dcae50 net: introduce per device index 
Instead of counting the device index everytime a functions needs it, store
it in the eth_device struct. eth_register() keeps track of the indices and
updates the device's index number. This simplifies some functions in
net/eth.c.

Additionally, a network driver can now query its index, eg. to get the
correct environment ethaddr name.

Signed-off-by: Michael Walle <michael@walle.cc>
Cc: Prafulla Wadaskar <prafulla@marvell.com>
Cc: Mike Frysinger <vapier@gentoo.com>
Cc: Wolfgang Denk <wd@denx.de>
Acked-by: Mike Frysinger <vapier@gentoo.org>
2011-12-20 22:57:25 +01:00

555 lines
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/*
* LiMon Monitor (LiMon) - Network.
*
* Copyright 1994 - 2000 Neil Russell.
* (See License)
*
*
* History
* 9/16/00 bor adapted to TQM823L/STK8xxL board, RARP/TFTP boot added
*/
#ifndef __NET_H__
#define __NET_H__
#if defined(CONFIG_8xx)
#include <commproc.h>
#endif /* CONFIG_8xx */
#include <asm/byteorder.h> /* for nton* / ntoh* stuff */
/*
* The number of receive packet buffers, and the required packet buffer
* alignment in memory.
*
*/
#ifdef CONFIG_SYS_RX_ETH_BUFFER
# define PKTBUFSRX CONFIG_SYS_RX_ETH_BUFFER
#else
# define PKTBUFSRX 4
#endif
#define PKTALIGN 32
/* IPv4 addresses are always 32 bits in size */
typedef u32 IPaddr_t;
/**
* An incoming packet handler.
* @param pkt pointer to the application packet
* @param dport destination UDP port
* @param sip source IP address
* @param sport source UDP port
* @param len packet length
*/
typedef void rxhand_f(uchar *pkt, unsigned dport,
IPaddr_t sip, unsigned sport,
unsigned len);
/**
* An incoming ICMP packet handler.
* @param type ICMP type
* @param code ICMP code
* @param dport destination UDP port
* @param sip source IP address
* @param sport source UDP port
* @param pkt pointer to the ICMP packet data
* @param len packet length
*/
typedef void rxhand_icmp_f(unsigned type, unsigned code, unsigned dport,
IPaddr_t sip, unsigned sport, uchar *pkt, unsigned len);
/*
* A timeout handler. Called after time interval has expired.
*/
typedef void thand_f(void);
#define NAMESIZE 16
enum eth_state_t {
ETH_STATE_INIT,
ETH_STATE_PASSIVE,
ETH_STATE_ACTIVE
};
struct eth_device {
char name[NAMESIZE];
unsigned char enetaddr[6];
int iobase;
int state;
int (*init) (struct eth_device*, bd_t*);
int (*send) (struct eth_device*, volatile void* packet, int length);
int (*recv) (struct eth_device*);
void (*halt) (struct eth_device*);
#ifdef CONFIG_MCAST_TFTP
int (*mcast) (struct eth_device*, u32 ip, u8 set);
#endif
int (*write_hwaddr) (struct eth_device*);
struct eth_device *next;
int index;
void *priv;
};
extern int eth_initialize(bd_t *bis); /* Initialize network subsystem */
extern int eth_register(struct eth_device* dev);/* Register network device */
extern void eth_try_another(int first_restart); /* Change the device */
extern void eth_set_current(void); /* set nterface to ethcur var */
extern struct eth_device *eth_get_dev(void); /* get the current device MAC */
extern struct eth_device *eth_get_dev_by_name(const char *devname);
extern struct eth_device *eth_get_dev_by_index(int index); /* get dev @ index */
extern int eth_get_dev_index (void); /* get the device index */
extern void eth_parse_enetaddr(const char *addr, uchar *enetaddr);
extern int eth_getenv_enetaddr(char *name, uchar *enetaddr);
extern int eth_setenv_enetaddr(char *name, const uchar *enetaddr);
/*
* Get the hardware address for an ethernet interface .
* Args:
* base_name - base name for device (normally "eth")
* index - device index number (0 for first)
* enetaddr - returns 6 byte hardware address
* Returns:
* Return true if the address is valid.
*/
extern int eth_getenv_enetaddr_by_index(const char *base_name, int index,
uchar *enetaddr);
extern int usb_eth_initialize(bd_t *bi);
extern int eth_init(bd_t *bis); /* Initialize the device */
extern int eth_send(volatile void *packet, int length); /* Send a packet */
#ifdef CONFIG_API
extern int eth_receive(volatile void *packet, int length); /* Receive a packet*/
#endif
extern int eth_rx(void); /* Check for received packets */
extern void eth_halt(void); /* stop SCC */
extern char *eth_get_name(void); /* get name of current device */
/*
* Set the hardware address for an ethernet interface based on 'eth%daddr'
* environment variable (or just 'ethaddr' if eth_number is 0).
* Args:
* base_name - base name for device (normally "eth")
* eth_number - value of %d (0 for first device of this type)
* Returns:
* 0 is success, non-zero is error status from driver.
*/
int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
int eth_number);
#ifdef CONFIG_MCAST_TFTP
int eth_mcast_join( IPaddr_t mcast_addr, u8 join);
u32 ether_crc (size_t len, unsigned char const *p);
#endif
/**********************************************************************/
/*
* Protocol headers.
*/
/*
* Ethernet header
*/
typedef struct {
uchar et_dest[6]; /* Destination node */
uchar et_src[6]; /* Source node */
ushort et_protlen; /* Protocol or length */
uchar et_dsap; /* 802 DSAP */
uchar et_ssap; /* 802 SSAP */
uchar et_ctl; /* 802 control */
uchar et_snap1; /* SNAP */
uchar et_snap2;
uchar et_snap3;
ushort et_prot; /* 802 protocol */
} Ethernet_t;
#define ETHER_HDR_SIZE 14 /* Ethernet header size */
#define E802_HDR_SIZE 22 /* 802 ethernet header size */
/*
* Ethernet header
*/
typedef struct {
uchar vet_dest[6]; /* Destination node */
uchar vet_src[6]; /* Source node */
ushort vet_vlan_type; /* PROT_VLAN */
ushort vet_tag; /* TAG of VLAN */
ushort vet_type; /* protocol type */
} VLAN_Ethernet_t;
#define VLAN_ETHER_HDR_SIZE 18 /* VLAN Ethernet header size */
#define PROT_IP 0x0800 /* IP protocol */
#define PROT_ARP 0x0806 /* IP ARP protocol */
#define PROT_RARP 0x8035 /* IP ARP protocol */
#define PROT_VLAN 0x8100 /* IEEE 802.1q protocol */
#define IPPROTO_ICMP 1 /* Internet Control Message Protocol */
#define IPPROTO_UDP 17 /* User Datagram Protocol */
/*
* Internet Protocol (IP) header.
*/
typedef struct {
uchar ip_hl_v; /* header length and version */
uchar ip_tos; /* type of service */
ushort ip_len; /* total length */
ushort ip_id; /* identification */
ushort ip_off; /* fragment offset field */
uchar ip_ttl; /* time to live */
uchar ip_p; /* protocol */
ushort ip_sum; /* checksum */
IPaddr_t ip_src; /* Source IP address */
IPaddr_t ip_dst; /* Destination IP address */
ushort udp_src; /* UDP source port */
ushort udp_dst; /* UDP destination port */
ushort udp_len; /* Length of UDP packet */
ushort udp_xsum; /* Checksum */
} IP_t;
#define IP_OFFS 0x1fff /* ip offset *= 8 */
#define IP_FLAGS 0xe000 /* first 3 bits */
#define IP_FLAGS_RES 0x8000 /* reserved */
#define IP_FLAGS_DFRAG 0x4000 /* don't fragments */
#define IP_FLAGS_MFRAG 0x2000 /* more fragments */
#define IP_HDR_SIZE_NO_UDP (sizeof (IP_t) - 8)
#define IP_HDR_SIZE (sizeof (IP_t))
/*
* Address Resolution Protocol (ARP) header.
*/
typedef struct
{
ushort ar_hrd; /* Format of hardware address */
# define ARP_ETHER 1 /* Ethernet hardware address */
ushort ar_pro; /* Format of protocol address */
uchar ar_hln; /* Length of hardware address */
uchar ar_pln; /* Length of protocol address */
ushort ar_op; /* Operation */
# define ARPOP_REQUEST 1 /* Request to resolve address */
# define ARPOP_REPLY 2 /* Response to previous request */
# define RARPOP_REQUEST 3 /* Request to resolve address */
# define RARPOP_REPLY 4 /* Response to previous request */
/*
* The remaining fields are variable in size, according to
* the sizes above, and are defined as appropriate for
* specific hardware/protocol combinations.
*/
uchar ar_data[0];
#if 0
uchar ar_sha[]; /* Sender hardware address */
uchar ar_spa[]; /* Sender protocol address */
uchar ar_tha[]; /* Target hardware address */
uchar ar_tpa[]; /* Target protocol address */
#endif /* 0 */
} ARP_t;
#define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */
/*
* ICMP stuff (just enough to handle (host) redirect messages)
*/
#define ICMP_ECHO_REPLY 0 /* Echo reply */
#define ICMP_NOT_REACH 3 /* Detination unreachable */
#define ICMP_REDIRECT 5 /* Redirect (change route) */
#define ICMP_ECHO_REQUEST 8 /* Echo request */
/* Codes for REDIRECT. */
#define ICMP_REDIR_NET 0 /* Redirect Net */
#define ICMP_REDIR_HOST 1 /* Redirect Host */
/* Codes for NOT_REACH */
#define ICMP_NOT_REACH_PORT 3 /* Port unreachable */
typedef struct icmphdr {
uchar type;
uchar code;
ushort checksum;
union {
struct {
ushort id;
ushort sequence;
} echo;
ulong gateway;
struct {
ushort __unused;
ushort mtu;
} frag;
uchar data[0];
} un;
} ICMP_t;
/*
* Maximum packet size; used to allocate packet storage.
* TFTP packets can be 524 bytes + IP header + ethernet header.
* Lets be conservative, and go for 38 * 16. (Must also be
* a multiple of 32 bytes).
*/
/*
* AS.HARNOIS : Better to set PKTSIZE to maximum size because
* traffic type is not always controlled
* maximum packet size = 1518
* maximum packet size and multiple of 32 bytes = 1536
*/
#define PKTSIZE 1518
#define PKTSIZE_ALIGN 1536
/*#define PKTSIZE 608*/
/*
* Maximum receive ring size; that is, the number of packets
* we can buffer before overflow happens. Basically, this just
* needs to be enough to prevent a packet being discarded while
* we are processing the previous one.
*/
#define RINGSZ 4
#define RINGSZ_LOG2 2
/**********************************************************************/
/*
* Globals.
*
* Note:
*
* All variables of type IPaddr_t are stored in NETWORK byte order
* (big endian).
*/
/* net.c */
/** BOOTP EXTENTIONS **/
extern IPaddr_t NetOurGatewayIP; /* Our gateway IP addresse */
extern IPaddr_t NetOurSubnetMask; /* Our subnet mask (0 = unknown)*/
extern IPaddr_t NetOurDNSIP; /* Our Domain Name Server (0 = unknown)*/
#if defined(CONFIG_BOOTP_DNS2)
extern IPaddr_t NetOurDNS2IP; /* Our 2nd Domain Name Server (0 = unknown)*/
#endif
extern char NetOurNISDomain[32]; /* Our NIS domain */
extern char NetOurHostName[32]; /* Our hostname */
extern char NetOurRootPath[64]; /* Our root path */
extern ushort NetBootFileSize; /* Our boot file size in blocks */
/** END OF BOOTP EXTENTIONS **/
extern ulong NetBootFileXferSize; /* size of bootfile in bytes */
extern uchar NetOurEther[6]; /* Our ethernet address */
extern uchar NetServerEther[6]; /* Boot server enet address */
extern IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */
extern IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */
extern volatile uchar * NetTxPacket; /* THE transmit packet */
extern volatile uchar * NetRxPackets[PKTBUFSRX];/* Receive packets */
extern volatile uchar * NetRxPacket; /* Current receive packet */
extern int NetRxPacketLen; /* Current rx packet length */
extern unsigned NetIPID; /* IP ID (counting) */
extern uchar NetBcastAddr[6]; /* Ethernet boardcast address */
extern uchar NetEtherNullAddr[6];
#define VLAN_NONE 4095 /* untagged */
#define VLAN_IDMASK 0x0fff /* mask of valid vlan id */
extern ushort NetOurVLAN; /* Our VLAN */
extern ushort NetOurNativeVLAN; /* Our Native VLAN */
extern uchar NetCDPAddr[6]; /* Ethernet CDP address */
extern ushort CDPNativeVLAN; /* CDP returned native VLAN */
extern ushort CDPApplianceVLAN; /* CDP returned appliance VLAN */
extern int NetState; /* Network loop state */
#define NETLOOP_CONTINUE 1
#define NETLOOP_RESTART 2
#define NETLOOP_SUCCESS 3
#define NETLOOP_FAIL 4
extern int NetRestartWrap; /* Tried all network devices */
enum proto_t {
BOOTP, RARP, ARP, TFTPGET, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP,
TFTPSRV, TFTPPUT
};
/* from net/net.c */
extern char BootFile[128]; /* Boot File name */
#if defined(CONFIG_CMD_DNS)
extern char *NetDNSResolve; /* The host to resolve */
extern char *NetDNSenvvar; /* the env var to put the ip into */
#endif
#if defined(CONFIG_CMD_PING)
extern IPaddr_t NetPingIP; /* the ip address to ping */
#endif
#if defined(CONFIG_CMD_CDP)
/* when CDP completes these hold the return values */
extern ushort CDPNativeVLAN;
extern ushort CDPApplianceVLAN;
#endif
#if defined(CONFIG_CMD_SNTP)
extern IPaddr_t NetNtpServerIP; /* the ip address to NTP */
extern int NetTimeOffset; /* offset time from UTC */
#endif
/* Initialize the network adapter */
extern int NetLoop(enum proto_t);
/* Shutdown adapters and cleanup */
extern void NetStop(void);
/* Load failed. Start again. */
extern void NetStartAgain(void);
/* Get size of the ethernet header when we send */
extern int NetEthHdrSize(void);
/* Set ethernet header; returns the size of the header */
extern int NetSetEther(volatile uchar *, uchar *, uint);
/* Set IP header */
extern void NetSetIP(volatile uchar *, IPaddr_t, int, int, int);
/* Checksum */
extern int NetCksumOk(uchar *, int); /* Return true if cksum OK */
extern uint NetCksum(uchar *, int); /* Calculate the checksum */
/* Set callbacks */
extern void NetSetHandler(rxhand_f *); /* Set RX packet handler */
extern void net_set_icmp_handler(rxhand_icmp_f *f); /* Set ICMP RX handler */
extern void NetSetTimeout(ulong, thand_f *);/* Set timeout handler */
/* Transmit "NetTxPacket" */
extern void NetSendPacket(volatile uchar *, int);
/* Transmit UDP packet, performing ARP request if needed */
extern int NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len);
/* Processes a received packet */
extern void NetReceive(volatile uchar *, int);
/*
* Check if autoload is enabled. If so, use either NFS or TFTP to download
* the boot file.
*/
void net_auto_load(void);
/*
* The following functions are a bit ugly, but necessary to deal with
* alignment restrictions on ARM.
*
* We're using inline functions, which had the smallest memory
* footprint in our tests.
*/
/* return IP *in network byteorder* */
static inline IPaddr_t NetReadIP(volatile void *from)
{
IPaddr_t ip;
memcpy((void*)&ip, (void*)from, sizeof(ip));
return ip;
}
/* return ulong *in network byteorder* */
static inline ulong NetReadLong(ulong *from)
{
ulong l;
memcpy((void*)&l, (void*)from, sizeof(l));
return l;
}
/* write IP *in network byteorder* */
static inline void NetWriteIP(void *to, IPaddr_t ip)
{
memcpy(to, (void*)&ip, sizeof(ip));
}
/* copy IP */
static inline void NetCopyIP(volatile void *to, void *from)
{
memcpy((void*)to, from, sizeof(IPaddr_t));
}
/* copy ulong */
static inline void NetCopyLong(ulong *to, ulong *from)
{
memcpy((void*)to, (void*)from, sizeof(ulong));
}
/**
* is_zero_ether_addr - Determine if give Ethernet address is all zeros.
* @addr: Pointer to a six-byte array containing the Ethernet address
*
* Return true if the address is all zeroes.
*/
static inline int is_zero_ether_addr(const u8 *addr)
{
return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
}
/**
* is_multicast_ether_addr - Determine if the Ethernet address is a multicast.
* @addr: Pointer to a six-byte array containing the Ethernet address
*
* Return true if the address is a multicast address.
* By definition the broadcast address is also a multicast address.
*/
static inline int is_multicast_ether_addr(const u8 *addr)
{
return (0x01 & addr[0]);
}
/*
* is_broadcast_ether_addr - Determine if the Ethernet address is broadcast
* @addr: Pointer to a six-byte array containing the Ethernet address
*
* Return true if the address is the broadcast address.
*/
static inline int is_broadcast_ether_addr(const u8 *addr)
{
return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) == 0xff;
}
/*
* is_valid_ether_addr - Determine if the given Ethernet address is valid
* @addr: Pointer to a six-byte array containing the Ethernet address
*
* Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not
* a multicast address, and is not FF:FF:FF:FF:FF:FF.
*
* Return true if the address is valid.
*/
static inline int is_valid_ether_addr(const u8 *addr)
{
/* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to
* explicitly check for it here. */
return !is_multicast_ether_addr(addr) && !is_zero_ether_addr(addr);
}
/* Convert an IP address to a string */
extern void ip_to_string (IPaddr_t x, char *s);
/* Convert a string to ip address */
extern IPaddr_t string_to_ip(const char *s);
/* Convert a VLAN id to a string */
extern void VLAN_to_string (ushort x, char *s);
/* Convert a string to a vlan id */
extern ushort string_to_VLAN(const char *s);
/* read a VLAN id from an environment variable */
extern ushort getenv_VLAN(char *);
/* copy a filename (allow for "..." notation, limit length) */
extern void copy_filename (char *dst, const char *src, int size);
/* get a random source port */
extern unsigned int random_port(void);
/**********************************************************************/
#endif /* __NET_H__ */
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