1 /* SPDX-License-Identifier: GPL-2.0 */
3 * LiMon Monitor (LiMon) - Network.
5 * Copyright 1994 - 2000 Neil Russell.
9 * 9/16/00 bor adapted to TQM823L/STK8xxL board, RARP/TFTP boot added
15 #include <linux/types.h>
16 #include <asm/cache.h>
17 #include <asm/byteorder.h> /* for nton* / ntoh* stuff */
21 #include <linux/if_ether.h>
28 #define DEBUG_LL_STATE 0 /* Link local state machine changes */
29 #define DEBUG_DEV_PKT 0 /* Packets or info directed to the device */
30 #define DEBUG_NET_PKT 0 /* Packets on info on the network at large */
31 #define DEBUG_INT_STATE 0 /* Internal network state changes */
34 * The number of receive packet buffers, and the required packet buffer
35 * alignment in memory.
38 #define PKTBUFSRX CONFIG_SYS_RX_ETH_BUFFER
39 #define PKTALIGN ARCH_DMA_MINALIGN
41 /* Number of packets processed together */
42 #define ETH_PACKETS_BATCH_RECV 32
44 /* ARP hardware address length */
47 * The size of a MAC address in string form, each digit requires two chars
48 * and five separator characters to form '00:00:00:00:00:00'.
50 #define ARP_HLEN_ASCII (ARP_HLEN * 2) + (ARP_HLEN - 1)
52 /* IPv4 addresses are always 32 bits in size */
58 * do_tftpb - Run the tftpboot command
60 * @cmdtp: Command information for tftpboot
61 * @flag: Command flags (CMD_FLAG_...)
62 * @argc: Number of arguments
63 * @argv: List of arguments
64 * Return: result (see enum command_ret_t)
66 int do_tftpb(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]);
69 * dhcp_run() - Run DHCP on the current ethernet device
71 * This sets the autoload variable, then puts it back to similar to its original
72 * state (y, n or unset).
74 * @addr: Address to load the file into (0 if @autoload is false)
75 * @fname: Filename of file to load (NULL if @autoload is false or to use the
77 * @autoload: true to load the file, false to just get the network IP
78 * @return 0 if OK, -EINVAL if the environment failed, -ENOENT if ant file was
81 int dhcp_run(ulong addr, const char *fname, bool autoload);
84 * An incoming packet handler.
85 * @param pkt pointer to the application packet
86 * @param dport destination UDP port
87 * @param sip source IP address
88 * @param sport source UDP port
89 * @param len packet length
91 typedef void rxhand_f(uchar *pkt, unsigned dport,
92 struct in_addr sip, unsigned sport,
96 * An incoming ICMP packet handler.
97 * @param type ICMP type
98 * @param code ICMP code
99 * @param dport destination UDP port
100 * @param sip source IP address
101 * @param sport source UDP port
102 * @param pkt pointer to the ICMP packet data
103 * @param len packet length
105 typedef void rxhand_icmp_f(unsigned type, unsigned code, unsigned dport,
106 struct in_addr sip, unsigned sport, uchar *pkt, unsigned len);
109 * A timeout handler. Called after time interval has expired.
111 typedef void thand_f(void);
120 * struct eth_pdata - Platform data for Ethernet MAC controllers
122 * @iobase: The base address of the hardware registers
123 * @enetaddr: The Ethernet MAC address that is loaded from EEPROM or env
124 * @phy_interface: PHY interface to use - see PHY_INTERFACE_MODE_...
125 * @max_speed: Maximum speed of Ethernet connection supported by MAC
126 * @priv_pdata: device specific plat
130 unsigned char enetaddr[ARP_HLEN];
136 enum eth_recv_flags {
138 * Check hardware device for new packets (otherwise only return those
139 * which are already in the memory buffer ready to process)
141 ETH_RECV_CHECK_DEVICE = 1 << 0,
145 * struct eth_ops - functions of Ethernet MAC controllers
147 * start: Prepare the hardware to send and receive packets
148 * send: Send the bytes passed in "packet" as a packet on the wire
149 * recv: Check if the hardware received a packet. If so, set the pointer to the
150 * packet buffer in the packetp parameter. If not, return an error or 0 to
151 * indicate that the hardware receive FIFO is empty. If 0 is returned, the
152 * network stack will not process the empty packet, but free_pkt() will be
154 * free_pkt: Give the driver an opportunity to manage its packet buffer memory
155 * when the network stack is finished processing it. This will only be
156 * called when no error was returned from recv - optional
157 * stop: Stop the hardware from looking for packets - may be called even if
159 * mcast: Join or leave a multicast group (for TFTP) - optional
160 * write_hwaddr: Write a MAC address to the hardware (used to pass it to Linux
161 * on some platforms like ARM). This function expects the
162 * eth_pdata::enetaddr field to be populated. The method can
163 * return -ENOSYS to indicate that this is not implemented for
164 this hardware - optional.
165 * read_rom_hwaddr: Some devices have a backup of the MAC address stored in a
166 * ROM on the board. This is how the driver should expose it
167 * to the network stack. This function should fill in the
168 * eth_pdata::enetaddr field - optional
169 * set_promisc: Enable or Disable promiscuous mode
170 * get_sset_count: Number of statistics counters
171 * get_string: Names of the statistic counters
172 * get_stats: The values of the statistic counters
175 int (*start)(struct udevice *dev);
176 int (*send)(struct udevice *dev, void *packet, int length);
177 int (*recv)(struct udevice *dev, int flags, uchar **packetp);
178 int (*free_pkt)(struct udevice *dev, uchar *packet, int length);
179 void (*stop)(struct udevice *dev);
180 int (*mcast)(struct udevice *dev, const u8 *enetaddr, int join);
181 int (*write_hwaddr)(struct udevice *dev);
182 int (*read_rom_hwaddr)(struct udevice *dev);
183 int (*set_promisc)(struct udevice *dev, bool enable);
184 int (*get_sset_count)(struct udevice *dev);
185 void (*get_strings)(struct udevice *dev, u8 *data);
186 void (*get_stats)(struct udevice *dev, u64 *data);
189 #define eth_get_ops(dev) ((struct eth_ops *)(dev)->driver->ops)
191 struct udevice *eth_get_dev(void); /* get the current device */
193 * The devname can be either an exact name given by the driver or device tree
194 * or it can be an alias of the form "eth%d"
196 struct udevice *eth_get_dev_by_name(const char *devname);
197 unsigned char *eth_get_ethaddr(void); /* get the current device MAC */
199 /* Used only when NetConsole is enabled */
200 int eth_is_active(struct udevice *dev); /* Test device for active state */
201 int eth_init_state_only(void); /* Set active state */
202 void eth_halt_state_only(void); /* Set passive state */
204 int eth_initialize(void); /* Initialize network subsystem */
205 void eth_try_another(int first_restart); /* Change the device */
206 void eth_set_current(void); /* set nterface to ethcur var */
208 int eth_get_dev_index(void); /* get the device index */
211 * eth_env_set_enetaddr_by_index() - set the MAC address environment variable
213 * This sets up an environment variable with the given MAC address (@enetaddr).
214 * The environment variable to be set is defined by <@base_name><@index>addr.
215 * If @index is 0 it is omitted. For common Ethernet this means ethaddr,
218 * @base_name: Base name for variable, typically "eth"
219 * @index: Index of interface being updated (>=0)
220 * @enetaddr: Pointer to MAC address to put into the variable
221 * Return: 0 if OK, other value on error
223 int eth_env_set_enetaddr_by_index(const char *base_name, int index,
228 * Initialize USB ethernet device with CONFIG_DM_ETH
230 * 0 is success, non-zero is error status.
232 int usb_ether_init(void);
235 * Get the hardware address for an ethernet interface .
237 * base_name - base name for device (normally "eth")
238 * index - device index number (0 for first)
239 * enetaddr - returns 6 byte hardware address
241 * Return true if the address is valid.
243 int eth_env_get_enetaddr_by_index(const char *base_name, int index,
246 int eth_init(void); /* Initialize the device */
247 int eth_send(void *packet, int length); /* Send a packet */
249 #if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
250 int eth_receive(void *packet, int length); /* Receive a packet*/
251 extern void (*push_packet)(void *packet, int length);
253 int eth_rx(void); /* Check for received packets */
254 void eth_halt(void); /* stop SCC */
255 const char *eth_get_name(void); /* get name of current device */
256 int eth_mcast_join(struct in_addr mcast_addr, int join);
258 /**********************************************************************/
267 struct ethernet_hdr {
268 u8 et_dest[ARP_HLEN]; /* Destination node */
269 u8 et_src[ARP_HLEN]; /* Source node */
270 u16 et_protlen; /* Protocol or length */
271 } __attribute__((packed));
273 /* Ethernet header size */
274 #define ETHER_HDR_SIZE (sizeof(struct ethernet_hdr))
276 #define ETH_FCS_LEN 4 /* Octets in the FCS */
279 u8 et_dest[ARP_HLEN]; /* Destination node */
280 u8 et_src[ARP_HLEN]; /* Source node */
281 u16 et_protlen; /* Protocol or length */
282 u8 et_dsap; /* 802 DSAP */
283 u8 et_ssap; /* 802 SSAP */
284 u8 et_ctl; /* 802 control */
285 u8 et_snap1; /* SNAP */
288 u16 et_prot; /* 802 protocol */
289 } __attribute__((packed));
291 /* 802 + SNAP + ethernet header size */
292 #define E802_HDR_SIZE (sizeof(struct e802_hdr))
295 * Virtual LAN Ethernet header
297 struct vlan_ethernet_hdr {
298 u8 vet_dest[ARP_HLEN]; /* Destination node */
299 u8 vet_src[ARP_HLEN]; /* Source node */
300 u16 vet_vlan_type; /* PROT_VLAN */
301 u16 vet_tag; /* TAG of VLAN */
302 u16 vet_type; /* protocol type */
303 } __attribute__((packed));
305 /* VLAN Ethernet header size */
306 #define VLAN_ETHER_HDR_SIZE (sizeof(struct vlan_ethernet_hdr))
308 #define PROT_IP 0x0800 /* IP protocol */
309 #define PROT_ARP 0x0806 /* IP ARP protocol */
310 #define PROT_WOL 0x0842 /* ether-wake WoL protocol */
311 #define PROT_RARP 0x8035 /* IP ARP protocol */
312 #define PROT_VLAN 0x8100 /* IEEE 802.1q protocol */
313 #define PROT_IPV6 0x86dd /* IPv6 over bluebook */
314 #define PROT_PPP_SES 0x8864 /* PPPoE session messages */
315 #define PROT_NCSI 0x88f8 /* NC-SI control packets */
317 #define IPPROTO_ICMP 1 /* Internet Control Message Protocol */
318 #define IPPROTO_TCP 6 /* Transmission Control Protocol */
319 #define IPPROTO_UDP 17 /* User Datagram Protocol */
322 * Internet Protocol (IP) header.
325 u8 ip_hl_v; /* header length and version */
326 u8 ip_tos; /* type of service */
327 u16 ip_len; /* total length */
328 u16 ip_id; /* identification */
329 u16 ip_off; /* fragment offset field */
330 u8 ip_ttl; /* time to live */
331 u8 ip_p; /* protocol */
332 u16 ip_sum; /* checksum */
333 struct in_addr ip_src; /* Source IP address */
334 struct in_addr ip_dst; /* Destination IP address */
335 } __attribute__((packed));
337 #define IP_OFFS 0x1fff /* ip offset *= 8 */
338 #define IP_FLAGS 0xe000 /* first 3 bits */
339 #define IP_FLAGS_RES 0x8000 /* reserved */
340 #define IP_FLAGS_DFRAG 0x4000 /* don't fragments */
341 #define IP_FLAGS_MFRAG 0x2000 /* more fragments */
343 #define IP_HDR_SIZE (sizeof(struct ip_hdr))
345 #define IP_MIN_FRAG_DATAGRAM_SIZE (IP_HDR_SIZE + 8)
348 * Internet Protocol (IP) + UDP header.
351 u8 ip_hl_v; /* header length and version */
352 u8 ip_tos; /* type of service */
353 u16 ip_len; /* total length */
354 u16 ip_id; /* identification */
355 u16 ip_off; /* fragment offset field */
356 u8 ip_ttl; /* time to live */
357 u8 ip_p; /* protocol */
358 u16 ip_sum; /* checksum */
359 struct in_addr ip_src; /* Source IP address */
360 struct in_addr ip_dst; /* Destination IP address */
361 u16 udp_src; /* UDP source port */
362 u16 udp_dst; /* UDP destination port */
363 u16 udp_len; /* Length of UDP packet */
364 u16 udp_xsum; /* Checksum */
365 } __attribute__((packed));
367 #define IP_UDP_HDR_SIZE (sizeof(struct ip_udp_hdr))
368 #define UDP_HDR_SIZE (IP_UDP_HDR_SIZE - IP_HDR_SIZE)
371 * Address Resolution Protocol (ARP) header.
374 u16 ar_hrd; /* Format of hardware address */
375 # define ARP_ETHER 1 /* Ethernet hardware address */
376 u16 ar_pro; /* Format of protocol address */
377 u8 ar_hln; /* Length of hardware address */
378 u8 ar_pln; /* Length of protocol address */
380 u16 ar_op; /* Operation */
381 # define ARPOP_REQUEST 1 /* Request to resolve address */
382 # define ARPOP_REPLY 2 /* Response to previous request */
384 # define RARPOP_REQUEST 3 /* Request to resolve address */
385 # define RARPOP_REPLY 4 /* Response to previous request */
388 * The remaining fields are variable in size, according to
389 * the sizes above, and are defined as appropriate for
390 * specific hardware/protocol combinations.
393 #define ar_sha ar_data[0]
394 #define ar_spa ar_data[ARP_HLEN]
395 #define ar_tha ar_data[ARP_HLEN + ARP_PLEN]
396 #define ar_tpa ar_data[ARP_HLEN + ARP_PLEN + ARP_HLEN]
398 u8 ar_sha[]; /* Sender hardware address */
399 u8 ar_spa[]; /* Sender protocol address */
400 u8 ar_tha[]; /* Target hardware address */
401 u8 ar_tpa[]; /* Target protocol address */
403 } __attribute__((packed));
405 #define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */
408 * ICMP stuff (just enough to handle (host) redirect messages)
410 #define ICMP_ECHO_REPLY 0 /* Echo reply */
411 #define ICMP_NOT_REACH 3 /* Detination unreachable */
412 #define ICMP_REDIRECT 5 /* Redirect (change route) */
413 #define ICMP_ECHO_REQUEST 8 /* Echo request */
415 /* Codes for REDIRECT. */
416 #define ICMP_REDIR_NET 0 /* Redirect Net */
417 #define ICMP_REDIR_HOST 1 /* Redirect Host */
419 /* Codes for NOT_REACH */
420 #define ICMP_NOT_REACH_PORT 3 /* Port unreachable */
438 } __attribute__((packed));
440 #define ICMP_HDR_SIZE (sizeof(struct icmp_hdr))
441 #define IP_ICMP_HDR_SIZE (IP_HDR_SIZE + ICMP_HDR_SIZE)
444 * Maximum packet size; used to allocate packet storage. Use
445 * the maxium Ethernet frame size as specified by the Ethernet
446 * standard including the 802.1Q tag (VLAN tagging).
447 * maximum packet size = 1522
448 * maximum packet size and multiple of 32 bytes = 1536
451 #ifndef CONFIG_DM_DSA
452 #define PKTSIZE_ALIGN 1536
454 /* Maximum DSA tagging overhead (headroom and/or tailroom) */
455 #define DSA_MAX_OVR 256
456 #define PKTSIZE_ALIGN (1536 + DSA_MAX_OVR)
460 * Maximum receive ring size; that is, the number of packets
461 * we can buffer before overflow happens. Basically, this just
462 * needs to be enough to prevent a packet being discarded while
463 * we are processing the previous one.
466 #define RINGSZ_LOG2 2
468 /**********************************************************************/
474 * All variables of type struct in_addr are stored in NETWORK byte order
479 /** BOOTP EXTENTIONS **/
480 extern struct in_addr net_gateway; /* Our gateway IP address */
481 extern struct in_addr net_netmask; /* Our subnet mask (0 = unknown) */
482 /* Our Domain Name Server (0 = unknown) */
483 extern struct in_addr net_dns_server;
484 #if defined(CONFIG_BOOTP_DNS2)
485 /* Our 2nd Domain Name Server (0 = unknown) */
486 extern struct in_addr net_dns_server2;
488 extern char net_nis_domain[32]; /* Our IS domain */
489 extern char net_hostname[32]; /* Our hostname */
491 extern char net_root_path[CONFIG_BOOTP_MAX_ROOT_PATH_LEN]; /* Our root path */
493 /* Indicates whether the pxe path prefix / config file was specified in dhcp option */
494 extern char *pxelinux_configfile;
495 /** END OF BOOTP EXTENTIONS **/
496 extern u8 net_ethaddr[ARP_HLEN]; /* Our ethernet address */
497 extern u8 net_server_ethaddr[ARP_HLEN]; /* Boot server enet address */
498 extern struct in_addr net_ip; /* Our IP addr (0 = unknown) */
499 extern struct in_addr net_server_ip; /* Server IP addr (0 = unknown) */
500 extern uchar *net_tx_packet; /* THE transmit packet */
501 extern uchar *net_rx_packets[PKTBUFSRX]; /* Receive packets */
502 extern uchar *net_rx_packet; /* Current receive packet */
503 extern int net_rx_packet_len; /* Current rx packet length */
504 extern const u8 net_bcast_ethaddr[ARP_HLEN]; /* Ethernet broadcast address */
505 extern const u8 net_null_ethaddr[ARP_HLEN];
507 #define VLAN_NONE 4095 /* untagged */
508 #define VLAN_IDMASK 0x0fff /* mask of valid vlan id */
509 extern ushort net_our_vlan; /* Our VLAN */
510 extern ushort net_native_vlan; /* Our Native VLAN */
512 extern int net_restart_wrap; /* Tried all network devices */
515 BOOTP, RARP, ARP, TFTPGET, DHCP, DHCP6, PING, PING6, DNS, NFS, CDP,
516 NETCONS, SNTP, TFTPSRV, TFTPPUT, LINKLOCAL, FASTBOOT_UDP, FASTBOOT_TCP,
517 WOL, UDP, NCSI, WGET, RS
520 extern char net_boot_file_name[1024];/* Boot File name */
521 /* Indicates whether the file name was specified on the command line */
522 extern bool net_boot_file_name_explicit;
523 /* The actual transferred size of the bootfile (in bytes) */
524 extern u32 net_boot_file_size;
525 /* Boot file size in blocks as reported by the DHCP server */
526 extern u32 net_boot_file_expected_size_in_blocks;
528 #if defined(CONFIG_CMD_DNS)
529 extern char *net_dns_resolve; /* The host to resolve */
530 extern char *net_dns_env_var; /* the env var to put the ip into */
533 #if defined(CONFIG_CMD_PING)
534 extern struct in_addr net_ping_ip; /* the ip address to ping */
537 #if defined(CONFIG_CMD_CDP)
538 /* when CDP completes these hold the return values */
539 extern ushort cdp_native_vlan; /* CDP returned native VLAN */
540 extern ushort cdp_appliance_vlan; /* CDP returned appliance VLAN */
543 * Check for a CDP packet by examining the received MAC address field
545 static inline int is_cdp_packet(const uchar *ethaddr)
547 extern const u8 net_cdp_ethaddr[ARP_HLEN];
549 return memcmp(ethaddr, net_cdp_ethaddr, ARP_HLEN) == 0;
553 #if defined(CONFIG_CMD_SNTP)
554 extern struct in_addr net_ntp_server; /* the ip address to NTP */
555 extern int net_ntp_time_offset; /* offset time from UTC */
558 /* Initialize the network adapter */
560 int net_loop(enum proto_t);
562 /* Load failed. Start again. */
563 int net_start_again(void);
565 /* Get size of the ethernet header when we send */
566 int net_eth_hdr_size(void);
568 /* Set ethernet header; returns the size of the header */
569 int net_set_ether(uchar *xet, const uchar *dest_ethaddr, uint prot);
570 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot);
573 void net_set_ip_header(uchar *pkt, struct in_addr dest, struct in_addr source,
574 u16 pkt_len, u8 proto);
575 void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport,
579 * compute_ip_checksum() - Compute IP checksum
581 * @addr: Address to check (must be 16-bit aligned)
582 * @nbytes: Number of bytes to check (normally a multiple of 2)
583 * Return: 16-bit IP checksum
585 unsigned compute_ip_checksum(const void *addr, unsigned nbytes);
588 * add_ip_checksums() - add two IP checksums
590 * @offset: Offset of first sum (if odd we do a byte-swap)
591 * @sum: First checksum
592 * @new_sum: New checksum to add
593 * Return: updated 16-bit IP checksum
595 unsigned add_ip_checksums(unsigned offset, unsigned sum, unsigned new_sum);
598 * ip_checksum_ok() - check if a checksum is correct
600 * This works by making sure the checksum sums to 0
602 * @addr: Address to check (must be 16-bit aligned)
603 * @nbytes: Number of bytes to check (normally a multiple of 2)
604 * Return: true if the checksum matches, false if not
606 int ip_checksum_ok(const void *addr, unsigned nbytes);
609 rxhand_f *net_get_udp_handler(void); /* Get UDP RX packet handler */
610 void net_set_udp_handler(rxhand_f *); /* Set UDP RX packet handler */
611 rxhand_f *net_get_arp_handler(void); /* Get ARP RX packet handler */
612 void net_set_arp_handler(rxhand_f *); /* Set ARP RX packet handler */
613 bool arp_is_waiting(void); /* Waiting for ARP reply? */
614 void net_set_icmp_handler(rxhand_icmp_f *f); /* Set ICMP RX handler */
615 void net_set_timeout_handler(ulong, thand_f *);/* Set timeout handler */
617 /* Network loop state */
618 enum net_loop_state {
624 extern enum net_loop_state net_state;
626 static inline void net_set_state(enum net_loop_state state)
628 debug_cond(DEBUG_INT_STATE, "--- NetState set to %d\n", state);
633 * net_get_async_tx_pkt_buf - Get a packet buffer that is not in use for
634 * sending an asynchronous reply
636 * returns - ptr to packet buffer
638 uchar * net_get_async_tx_pkt_buf(void);
640 /* Transmit a packet */
641 static inline void net_send_packet(uchar *pkt, int len)
643 /* Currently no way to return errors from eth_send() */
644 (void) eth_send(pkt, len);
648 * net_send_ip_packet() - Transmit "net_tx_packet" as UDP or TCP packet,
649 * send ARP request if needed (ether will be populated)
650 * @ether: Raw packet buffer
651 * @dest: IP address to send the datagram to
652 * @dport: Destination UDP port
653 * @sport: Source UDP port
654 * @payload_len: Length of data after the UDP header
655 * @action: TCP action to be performed
656 * @tcp_seq_num: TCP sequence number of this transmission
657 * @tcp_ack_num: TCP stream acknolegement number
659 * Return: 0 on success, other value on failure
661 int net_send_ip_packet(uchar *ether, struct in_addr dest, int dport, int sport,
662 int payload_len, int proto, u8 action, u32 tcp_seq_num,
665 * net_send_tcp_packet() - Transmit TCP packet.
666 * @payload_len: length of payload
667 * @dport: Destination TCP port
668 * @sport: Source TCP port
669 * @action: TCP action to be performed
670 * @tcp_seq_num: TCP sequence number of this transmission
671 * @tcp_ack_num: TCP stream acknolegement number
673 * Return: 0 on success, other value on failure
675 int net_send_tcp_packet(int payload_len, int dport, int sport, u8 action,
676 u32 tcp_seq_num, u32 tcp_ack_num);
677 int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport,
678 int sport, int payload_len);
680 /* Processes a received packet */
681 void net_process_received_packet(uchar *in_packet, int len);
683 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
685 int nc_input_packet(uchar *pkt, struct in_addr src_ip, unsigned dest_port,
686 unsigned src_port, unsigned len);
689 static __always_inline int eth_is_on_demand_init(void)
691 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
692 extern enum proto_t net_loop_last_protocol;
694 return net_loop_last_protocol != NETCONS;
700 static inline void eth_set_last_protocol(int protocol)
702 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
703 extern enum proto_t net_loop_last_protocol;
705 net_loop_last_protocol = protocol;
710 * Check if autoload is enabled. If so, use either NFS or TFTP to download
713 void net_auto_load(void);
716 * The following functions are a bit ugly, but necessary to deal with
717 * alignment restrictions on ARM.
719 * We're using inline functions, which had the smallest memory
720 * footprint in our tests.
722 /* return IP *in network byteorder* */
723 static inline struct in_addr net_read_ip(void *from)
727 memcpy((void *)&ip, (void *)from, sizeof(ip));
731 /* return ulong *in network byteorder* */
732 static inline u32 net_read_u32(void *from)
736 memcpy((void *)&l, (void *)from, sizeof(l));
740 /* write IP *in network byteorder* */
741 static inline void net_write_ip(void *to, struct in_addr ip)
743 memcpy(to, (void *)&ip, sizeof(ip));
747 static inline void net_copy_ip(void *to, void *from)
749 memcpy((void *)to, from, sizeof(struct in_addr));
753 static inline void net_copy_u32(void *to, void *from)
755 memcpy((void *)to, (void *)from, sizeof(u32));
759 * is_zero_ethaddr - Determine if give Ethernet address is all zeros.
760 * @addr: Pointer to a six-byte array containing the Ethernet address
762 * Return true if the address is all zeroes.
764 static inline int is_zero_ethaddr(const u8 *addr)
766 return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
770 * is_multicast_ethaddr - Determine if the Ethernet address is a multicast.
771 * @addr: Pointer to a six-byte array containing the Ethernet address
773 * Return true if the address is a multicast address.
774 * By definition the broadcast address is also a multicast address.
776 static inline int is_multicast_ethaddr(const u8 *addr)
778 return 0x01 & addr[0];
782 * is_broadcast_ethaddr - Determine if the Ethernet address is broadcast
783 * @addr: Pointer to a six-byte array containing the Ethernet address
785 * Return true if the address is the broadcast address.
787 static inline int is_broadcast_ethaddr(const u8 *addr)
789 return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) ==
794 * is_valid_ethaddr - Determine if the given Ethernet address is valid
795 * @addr: Pointer to a six-byte array containing the Ethernet address
797 * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not
798 * a multicast address, and is not FF:FF:FF:FF:FF:FF.
800 * Return true if the address is valid.
802 static inline int is_valid_ethaddr(const u8 *addr)
804 /* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to
805 * explicitly check for it here. */
806 return !is_multicast_ethaddr(addr) && !is_zero_ethaddr(addr);
810 * net_random_ethaddr - Generate software assigned random Ethernet address
811 * @addr: Pointer to a six-byte array containing the Ethernet address
813 * Generate a random Ethernet address (MAC) that is not multicast
814 * and has the local assigned bit set.
816 static inline void net_random_ethaddr(uchar *addr)
819 unsigned int seed = get_ticks();
821 for (i = 0; i < 6; i++)
822 addr[i] = rand_r(&seed);
824 addr[0] &= 0xfe; /* clear multicast bit */
825 addr[0] |= 0x02; /* set local assignment bit (IEEE802) */
829 * string_to_enetaddr() - Parse a MAC address
831 * Convert a string MAC address
833 * Implemented in lib/net_utils.c (built unconditionally)
835 * @addr: MAC address in aa:bb:cc:dd:ee:ff format, where each part is a 2-digit
837 * @enetaddr: Place to put MAC address (6 bytes)
839 void string_to_enetaddr(const char *addr, uint8_t *enetaddr);
841 /* Convert an IP address to a string */
842 void ip_to_string(struct in_addr x, char *s);
845 * string_to_ip() - Convert a string to ip address
847 * Implemented in lib/net_utils.c (built unconditionally)
849 * @s: Input string to parse
850 * @return: in_addr struct containing the parsed IP address
852 struct in_addr string_to_ip(const char *s);
854 /* Convert a VLAN id to a string */
855 void vlan_to_string(ushort x, char *s);
857 /* Convert a string to a vlan id */
858 ushort string_to_vlan(const char *s);
860 /* read a VLAN id from an environment variable */
861 ushort env_get_vlan(char *);
863 /* copy a filename (allow for "..." notation, limit length) */
864 void copy_filename(char *dst, const char *src, int size);
866 /* check if serverip is specified in filename from the command line */
867 int is_serverip_in_cmd(void);
870 * net_parse_bootfile - Parse the bootfile env var / cmd line param
872 * @param ipaddr - a pointer to the ipaddr to populate if included in bootfile
873 * @param filename - a pointer to the string to save the filename part
874 * @param max_len - The longest - 1 that the filename part can be
876 * return 1 if parsed, 0 if bootfile is empty
878 int net_parse_bootfile(struct in_addr *ipaddr, char *filename, int max_len);
881 * update_tftp - Update firmware over TFTP (via DFU)
883 * This function updates board's firmware via TFTP
885 * @param addr - memory address where data is stored
886 * @param interface - the DFU medium name - e.g. "mmc"
887 * @param devstring - the DFU medium number - e.g. "1"
889 * Return: - 0 on success, other value on failure
891 int update_tftp(ulong addr, char *interface, char *devstring);
894 * env_get_ip() - Convert an environment value to to an ip address
896 * @var: Environment variable to convert. The value of this variable must be
897 * in the format format a.b.c.d, where each value is a decimal number from
899 * Return: IP address, or 0 if invalid
901 static inline struct in_addr env_get_ip(char *var)
903 return string_to_ip(env_get(var));
907 * reset_phy() - Reset the Ethernet PHY
909 * This should be implemented by boards if CONFIG_RESET_PHY_R is enabled
911 void reset_phy(void);
913 #if CONFIG_IS_ENABLED(NET)
915 * eth_set_enable_bootdevs() - Enable or disable binding of Ethernet bootdevs
917 * These get in the way of bootstd testing, so are normally disabled by tests.
918 * This provide control of this setting. It only affects binding of Ethernet
919 * devices, so if that has already happened, this flag does nothing.
921 * @enable: true to enable binding of bootdevs when binding new Ethernet
922 * devices, false to disable it
924 void eth_set_enable_bootdevs(bool enable);
926 static inline void eth_set_enable_bootdevs(bool enable) {}
929 #endif /* __NET_H__ */