2 * (C) Copyright 2001-2015
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 * Joe Hershberger, National Instruments
6 * SPDX-License-Identifier: GPL-2.0+
12 #include <environment.h>
16 #include <asm/errno.h>
17 #include <dm/device-internal.h>
18 #include <dm/uclass-internal.h>
20 DECLARE_GLOBAL_DATA_PTR
;
22 void eth_parse_enetaddr(const char *addr
, uchar
*enetaddr
)
27 for (i
= 0; i
< 6; ++i
) {
28 enetaddr
[i
] = addr
? simple_strtoul(addr
, &end
, 16) : 0;
30 addr
= (*end
) ? end
+ 1 : end
;
34 int eth_getenv_enetaddr(const char *name
, uchar
*enetaddr
)
36 eth_parse_enetaddr(getenv(name
), enetaddr
);
37 return is_valid_ethaddr(enetaddr
);
40 int eth_setenv_enetaddr(const char *name
, const uchar
*enetaddr
)
44 sprintf(buf
, "%pM", enetaddr
);
46 return setenv(name
, buf
);
49 int eth_getenv_enetaddr_by_index(const char *base_name
, int index
,
53 sprintf(enetvar
, index
? "%s%daddr" : "%saddr", base_name
, index
);
54 return eth_getenv_enetaddr(enetvar
, enetaddr
);
57 static inline int eth_setenv_enetaddr_by_index(const char *base_name
, int index
,
61 sprintf(enetvar
, index
? "%s%daddr" : "%saddr", base_name
, index
);
62 return eth_setenv_enetaddr(enetvar
, enetaddr
);
65 static int eth_mac_skip(int index
)
70 sprintf(enetvar
, index
? "eth%dmacskip" : "ethmacskip", index
);
71 skip_state
= getenv(enetvar
);
72 return skip_state
!= NULL
;
75 static void eth_current_changed(void);
78 * CPU and board-specific Ethernet initializations. Aliased function
79 * signals caller to move on
81 static int __def_eth_init(bd_t
*bis
)
85 int cpu_eth_init(bd_t
*bis
) __attribute__((weak
, alias("__def_eth_init")));
86 int board_eth_init(bd_t
*bis
) __attribute__((weak
, alias("__def_eth_init")));
88 static void eth_common_init(void)
90 bootstage_mark(BOOTSTAGE_ID_NET_ETH_START
);
91 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) || defined(CONFIG_PHYLIB)
100 * If board-specific initialization exists, call it.
101 * If not, call a CPU-specific one
103 if (board_eth_init
!= __def_eth_init
) {
104 if (board_eth_init(gd
->bd
) < 0)
105 printf("Board Net Initialization Failed\n");
106 } else if (cpu_eth_init
!= __def_eth_init
) {
107 if (cpu_eth_init(gd
->bd
) < 0)
108 printf("CPU Net Initialization Failed\n");
110 #ifndef CONFIG_DM_ETH
111 printf("Net Initialization Skipped\n");
118 * struct eth_device_priv - private structure for each Ethernet device
120 * @state: The state of the Ethernet MAC driver (defined by enum eth_state_t)
122 struct eth_device_priv
{
123 enum eth_state_t state
;
127 * struct eth_uclass_priv - The structure attached to the uclass itself
129 * @current: The Ethernet device that the network functions are using
131 struct eth_uclass_priv
{
132 struct udevice
*current
;
135 /* eth_errno - This stores the most recent failure code from DM functions */
136 static int eth_errno
;
138 static struct eth_uclass_priv
*eth_get_uclass_priv(void)
142 uclass_get(UCLASS_ETH
, &uc
);
147 static void eth_set_current_to_next(void)
149 struct eth_uclass_priv
*uc_priv
;
151 uc_priv
= eth_get_uclass_priv();
152 if (uc_priv
->current
)
153 uclass_next_device(&uc_priv
->current
);
154 if (!uc_priv
->current
)
155 uclass_first_device(UCLASS_ETH
, &uc_priv
->current
);
159 * Typically this will simply return the active device.
160 * In the case where the most recent active device was unset, this will attempt
161 * to return the first device. If that device doesn't exist or fails to probe,
162 * this function will return NULL.
164 struct udevice
*eth_get_dev(void)
166 struct eth_uclass_priv
*uc_priv
;
168 uc_priv
= eth_get_uclass_priv();
169 if (!uc_priv
->current
)
170 eth_errno
= uclass_first_device(UCLASS_ETH
,
172 return uc_priv
->current
;
176 * Typically this will just store a device pointer.
177 * In case it was not probed, we will attempt to do so.
178 * dev may be NULL to unset the active device.
180 static void eth_set_dev(struct udevice
*dev
)
182 if (dev
&& !device_active(dev
)) {
183 eth_errno
= device_probe(dev
);
188 eth_get_uclass_priv()->current
= dev
;
192 * Find the udevice that either has the name passed in as devname or has an
193 * alias named devname.
195 struct udevice
*eth_get_dev_by_name(const char *devname
)
199 const char *startp
= NULL
;
202 int len
= strlen("eth");
204 /* Must be longer than 3 to be an alias */
205 if (!strncmp(devname
, "eth", len
) && strlen(devname
) > len
) {
206 startp
= devname
+ len
;
207 seq
= simple_strtoul(startp
, &endp
, 10);
210 uclass_get(UCLASS_ETH
, &uc
);
211 uclass_foreach_dev(it
, uc
) {
213 * We need the seq to be valid, so try to probe it.
214 * If the probe fails, the seq will not match since it will be
215 * -1 instead of what we are looking for.
216 * We don't care about errors from probe here. Either they won't
217 * match an alias or it will match a literal name and we'll pick
218 * up the error when we try to probe again in eth_set_dev().
220 if (device_probe(it
))
222 /* Check for the name or the sequence number to match */
223 if (strcmp(it
->name
, devname
) == 0 ||
224 (endp
> startp
&& it
->seq
== seq
))
231 unsigned char *eth_get_ethaddr(void)
233 struct eth_pdata
*pdata
;
236 pdata
= eth_get_dev()->platdata
;
237 return pdata
->enetaddr
;
243 /* Set active state without calling start on the driver */
244 int eth_init_state_only(void)
246 struct udevice
*current
;
247 struct eth_device_priv
*priv
;
249 current
= eth_get_dev();
250 if (!current
|| !device_active(current
))
253 priv
= current
->uclass_priv
;
254 priv
->state
= ETH_STATE_ACTIVE
;
259 /* Set passive state without calling stop on the driver */
260 void eth_halt_state_only(void)
262 struct udevice
*current
;
263 struct eth_device_priv
*priv
;
265 current
= eth_get_dev();
266 if (!current
|| !device_active(current
))
269 priv
= current
->uclass_priv
;
270 priv
->state
= ETH_STATE_PASSIVE
;
273 int eth_get_dev_index(void)
276 return eth_get_dev()->seq
;
280 static int eth_write_hwaddr(struct udevice
*dev
)
282 struct eth_pdata
*pdata
= dev
->platdata
;
285 if (!dev
|| !device_active(dev
))
288 /* seq is valid since the device is active */
289 if (eth_get_ops(dev
)->write_hwaddr
&& !eth_mac_skip(dev
->seq
)) {
290 if (!is_valid_ethaddr(pdata
->enetaddr
)) {
291 printf("\nError: %s address %pM illegal value\n",
292 dev
->name
, pdata
->enetaddr
);
297 * Drivers are allowed to decide not to implement this at
298 * run-time. E.g. Some devices may use it and some may not.
300 ret
= eth_get_ops(dev
)->write_hwaddr(dev
);
304 printf("\nWarning: %s failed to set MAC address\n",
311 static int on_ethaddr(const char *name
, const char *value
, enum env_op op
,
318 /* look for an index after "eth" */
319 index
= simple_strtoul(name
+ 3, NULL
, 10);
321 retval
= uclass_find_device_by_seq(UCLASS_ETH
, index
, false, &dev
);
323 struct eth_pdata
*pdata
= dev
->platdata
;
326 case env_op_overwrite
:
327 eth_parse_enetaddr(value
, pdata
->enetaddr
);
330 memset(pdata
->enetaddr
, 0, 6);
336 U_BOOT_ENV_CALLBACK(ethaddr
, on_ethaddr
);
340 char *ethact
= getenv("ethact");
341 char *ethrotate
= getenv("ethrotate");
342 struct udevice
*current
= NULL
;
343 struct udevice
*old_current
;
347 * When 'ethrotate' variable is set to 'no' and 'ethact' variable
348 * is already set to an ethernet device, we should stick to 'ethact'.
350 if ((ethrotate
!= NULL
) && (strcmp(ethrotate
, "no") == 0)) {
352 current
= eth_get_dev_by_name(ethact
);
359 current
= eth_get_dev();
361 printf("No ethernet found.\n");
366 old_current
= current
;
369 debug("Trying %s\n", current
->name
);
371 if (device_active(current
)) {
372 ret
= eth_get_ops(current
)->start(current
);
374 struct eth_device_priv
*priv
=
375 current
->uclass_priv
;
377 priv
->state
= ETH_STATE_ACTIVE
;
386 debug("PROBE FAIL\n");
390 * If ethrotate is enabled, this will change "current",
391 * otherwise we will drop out of this while loop immediately
394 /* This will ensure the new "current" attempted to probe */
395 current
= eth_get_dev();
396 } while (old_current
!= current
);
403 struct udevice
*current
;
404 struct eth_device_priv
*priv
;
406 current
= eth_get_dev();
407 if (!current
|| !device_active(current
))
410 eth_get_ops(current
)->stop(current
);
411 priv
= current
->uclass_priv
;
412 priv
->state
= ETH_STATE_PASSIVE
;
415 int eth_is_active(struct udevice
*dev
)
417 struct eth_device_priv
*priv
;
419 if (!dev
|| !device_active(dev
))
422 priv
= dev_get_uclass_priv(dev
);
423 return priv
->state
== ETH_STATE_ACTIVE
;
426 int eth_send(void *packet
, int length
)
428 struct udevice
*current
;
431 current
= eth_get_dev();
435 if (!device_active(current
))
438 ret
= eth_get_ops(current
)->send(current
, packet
, length
);
440 /* We cannot completely return the error at present */
441 debug("%s: send() returned error %d\n", __func__
, ret
);
448 struct udevice
*current
;
454 current
= eth_get_dev();
458 if (!device_active(current
))
461 /* Process up to 32 packets at one time */
462 flags
= ETH_RECV_CHECK_DEVICE
;
463 for (i
= 0; i
< 32; i
++) {
464 ret
= eth_get_ops(current
)->recv(current
, flags
, &packet
);
467 net_process_received_packet(packet
, ret
);
468 if (ret
>= 0 && eth_get_ops(current
)->free_pkt
)
469 eth_get_ops(current
)->free_pkt(current
, packet
, ret
);
476 /* We cannot completely return the error at present */
477 debug("%s: recv() returned error %d\n", __func__
, ret
);
482 int eth_initialize(void)
490 * Devices need to write the hwaddr even if not started so that Linux
491 * will have access to the hwaddr that u-boot stored for the device.
492 * This is accomplished by attempting to probe each device and calling
493 * their write_hwaddr() operation.
495 uclass_first_device(UCLASS_ETH
, &dev
);
497 printf("No ethernet found.\n");
498 bootstage_error(BOOTSTAGE_ID_NET_ETH_START
);
500 char *ethprime
= getenv("ethprime");
501 struct udevice
*prime_dev
= NULL
;
504 prime_dev
= eth_get_dev_by_name(ethprime
);
506 eth_set_dev(prime_dev
);
507 eth_current_changed();
512 bootstage_mark(BOOTSTAGE_ID_NET_ETH_INIT
);
517 printf("eth%d: %s", dev
->seq
, dev
->name
);
519 if (ethprime
&& dev
== prime_dev
)
522 eth_write_hwaddr(dev
);
524 uclass_next_device(&dev
);
534 static int eth_post_bind(struct udevice
*dev
)
536 if (strchr(dev
->name
, ' ')) {
537 printf("\nError: eth device name \"%s\" has a space!\n",
545 static int eth_pre_unbind(struct udevice
*dev
)
547 /* Don't hang onto a pointer that is going away */
548 if (dev
== eth_get_uclass_priv()->current
)
554 static int eth_post_probe(struct udevice
*dev
)
556 struct eth_device_priv
*priv
= dev
->uclass_priv
;
557 struct eth_pdata
*pdata
= dev
->platdata
;
558 unsigned char env_enetaddr
[6];
560 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
561 struct eth_ops
*ops
= eth_get_ops(dev
);
562 static int reloc_done
;
566 ops
->start
+= gd
->reloc_off
;
568 ops
->send
+= gd
->reloc_off
;
570 ops
->recv
+= gd
->reloc_off
;
572 ops
->free_pkt
+= gd
->reloc_off
;
574 ops
->stop
+= gd
->reloc_off
;
575 #ifdef CONFIG_MCAST_TFTP
577 ops
->mcast
+= gd
->reloc_off
;
579 if (ops
->write_hwaddr
)
580 ops
->write_hwaddr
+= gd
->reloc_off
;
581 if (ops
->read_rom_hwaddr
)
582 ops
->read_rom_hwaddr
+= gd
->reloc_off
;
588 priv
->state
= ETH_STATE_INIT
;
590 /* Check if the device has a MAC address in ROM */
591 if (eth_get_ops(dev
)->read_rom_hwaddr
)
592 eth_get_ops(dev
)->read_rom_hwaddr(dev
);
594 eth_getenv_enetaddr_by_index("eth", dev
->seq
, env_enetaddr
);
595 if (!is_zero_ethaddr(env_enetaddr
)) {
596 if (!is_zero_ethaddr(pdata
->enetaddr
) &&
597 memcmp(pdata
->enetaddr
, env_enetaddr
, 6)) {
598 printf("\nWarning: %s MAC addresses don't match:\n",
600 printf("Address in SROM is %pM\n",
602 printf("Address in environment is %pM\n",
606 /* Override the ROM MAC address */
607 memcpy(pdata
->enetaddr
, env_enetaddr
, 6);
608 } else if (is_valid_ethaddr(pdata
->enetaddr
)) {
609 eth_setenv_enetaddr_by_index("eth", dev
->seq
, pdata
->enetaddr
);
610 printf("\nWarning: %s using MAC address from ROM\n",
612 } else if (is_zero_ethaddr(pdata
->enetaddr
)) {
613 #ifdef CONFIG_NET_RANDOM_ETHADDR
614 net_random_ethaddr(pdata
->enetaddr
);
615 printf("\nWarning: %s (eth%d) using random MAC address - %pM\n",
616 dev
->name
, dev
->seq
, pdata
->enetaddr
);
618 printf("\nError: %s address not set.\n",
627 static int eth_pre_remove(struct udevice
*dev
)
629 struct eth_pdata
*pdata
= dev
->platdata
;
631 eth_get_ops(dev
)->stop(dev
);
633 /* clear the MAC address */
634 memset(pdata
->enetaddr
, 0, 6);
639 UCLASS_DRIVER(eth
) = {
642 .post_bind
= eth_post_bind
,
643 .pre_unbind
= eth_pre_unbind
,
644 .post_probe
= eth_post_probe
,
645 .pre_remove
= eth_pre_remove
,
646 .priv_auto_alloc_size
= sizeof(struct eth_uclass_priv
),
647 .per_device_auto_alloc_size
= sizeof(struct eth_device_priv
),
648 .flags
= DM_UC_FLAG_SEQ_ALIAS
,
650 #endif /* #ifdef CONFIG_DM_ETH */
652 #ifndef CONFIG_DM_ETH
658 } eth_rcv_bufs
[PKTBUFSRX
];
660 static unsigned int eth_rcv_current
, eth_rcv_last
;
663 static struct eth_device
*eth_devices
;
664 struct eth_device
*eth_current
;
666 static void eth_set_current_to_next(void)
668 eth_current
= eth_current
->next
;
671 static void eth_set_dev(struct eth_device
*dev
)
676 struct eth_device
*eth_get_dev_by_name(const char *devname
)
678 struct eth_device
*dev
, *target_dev
;
680 BUG_ON(devname
== NULL
);
688 if (strcmp(devname
, dev
->name
) == 0) {
693 } while (dev
!= eth_devices
);
698 struct eth_device
*eth_get_dev_by_index(int index
)
700 struct eth_device
*dev
, *target_dev
;
708 if (dev
->index
== index
) {
713 } while (dev
!= eth_devices
);
718 int eth_get_dev_index(void)
723 return eth_current
->index
;
726 static int on_ethaddr(const char *name
, const char *value
, enum env_op op
,
730 struct eth_device
*dev
;
735 /* look for an index after "eth" */
736 index
= simple_strtoul(name
+ 3, NULL
, 10);
740 if (dev
->index
== index
) {
743 case env_op_overwrite
:
744 eth_parse_enetaddr(value
, dev
->enetaddr
);
747 memset(dev
->enetaddr
, 0, 6);
751 } while (dev
!= eth_devices
);
755 U_BOOT_ENV_CALLBACK(ethaddr
, on_ethaddr
);
757 int eth_write_hwaddr(struct eth_device
*dev
, const char *base_name
,
760 unsigned char env_enetaddr
[6];
763 eth_getenv_enetaddr_by_index(base_name
, eth_number
, env_enetaddr
);
765 if (!is_zero_ethaddr(env_enetaddr
)) {
766 if (!is_zero_ethaddr(dev
->enetaddr
) &&
767 memcmp(dev
->enetaddr
, env_enetaddr
, 6)) {
768 printf("\nWarning: %s MAC addresses don't match:\n",
770 printf("Address in SROM is %pM\n",
772 printf("Address in environment is %pM\n",
776 memcpy(dev
->enetaddr
, env_enetaddr
, 6);
777 } else if (is_valid_ethaddr(dev
->enetaddr
)) {
778 eth_setenv_enetaddr_by_index(base_name
, eth_number
,
780 printf("\nWarning: %s using MAC address from net device\n",
782 } else if (is_zero_ethaddr(dev
->enetaddr
)) {
783 #ifdef CONFIG_NET_RANDOM_ETHADDR
784 net_random_ethaddr(dev
->enetaddr
);
785 printf("\nWarning: %s (eth%d) using random MAC address - %pM\n",
786 dev
->name
, eth_number
, dev
->enetaddr
);
788 printf("\nError: %s address not set.\n",
794 if (dev
->write_hwaddr
&& !eth_mac_skip(eth_number
)) {
795 if (!is_valid_ethaddr(dev
->enetaddr
)) {
796 printf("\nError: %s address %pM illegal value\n",
797 dev
->name
, dev
->enetaddr
);
801 ret
= dev
->write_hwaddr(dev
);
803 printf("\nWarning: %s failed to set MAC address\n",
810 int eth_register(struct eth_device
*dev
)
812 struct eth_device
*d
;
815 assert(strlen(dev
->name
) < sizeof(dev
->name
));
820 eth_current_changed();
822 for (d
= eth_devices
; d
->next
!= eth_devices
; d
= d
->next
)
827 dev
->state
= ETH_STATE_INIT
;
828 dev
->next
= eth_devices
;
829 dev
->index
= index
++;
834 int eth_unregister(struct eth_device
*dev
)
836 struct eth_device
*cur
;
842 for (cur
= eth_devices
; cur
->next
!= eth_devices
&& cur
->next
!= dev
;
846 /* Device not found */
847 if (cur
->next
!= dev
)
850 cur
->next
= dev
->next
;
852 if (eth_devices
== dev
)
853 eth_devices
= dev
->next
== eth_devices
? NULL
: dev
->next
;
855 if (eth_current
== dev
) {
856 eth_current
= eth_devices
;
857 eth_current_changed();
863 int eth_initialize(void)
872 puts("No ethernet found.\n");
873 bootstage_error(BOOTSTAGE_ID_NET_ETH_START
);
875 struct eth_device
*dev
= eth_devices
;
876 char *ethprime
= getenv("ethprime");
878 bootstage_mark(BOOTSTAGE_ID_NET_ETH_INIT
);
883 printf("%s", dev
->name
);
885 if (ethprime
&& strcmp(dev
->name
, ethprime
) == 0) {
890 if (strchr(dev
->name
, ' '))
891 puts("\nWarning: eth device name has a space!"
894 eth_write_hwaddr(dev
, "eth", dev
->index
);
898 } while (dev
!= eth_devices
);
900 eth_current_changed();
907 #ifdef CONFIG_MCAST_TFTP
909 * mcast_addr: multicast ipaddr from which multicast Mac is made
910 * join: 1=join, 0=leave.
912 int eth_mcast_join(struct in_addr mcast_ip
, int join
)
915 if (!eth_current
|| !eth_current
->mcast
)
917 mcast_mac
[5] = htonl(mcast_ip
.s_addr
) & 0xff;
918 mcast_mac
[4] = (htonl(mcast_ip
.s_addr
)>>8) & 0xff;
919 mcast_mac
[3] = (htonl(mcast_ip
.s_addr
)>>16) & 0x7f;
923 return eth_current
->mcast(eth_current
, mcast_mac
, join
);
926 /* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c
927 * and this is the ethernet-crc method needed for TSEC -- and perhaps
928 * some other adapter -- hash tables
930 #define CRCPOLY_LE 0xedb88320
931 u32
ether_crc(size_t len
, unsigned char const *p
)
938 for (i
= 0; i
< 8; i
++)
939 crc
= (crc
>> 1) ^ ((crc
& 1) ? CRCPOLY_LE
: 0);
941 /* an reverse the bits, cuz of way they arrive -- last-first */
942 crc
= (crc
>> 16) | (crc
<< 16);
943 crc
= (crc
>> 8 & 0x00ff00ff) | (crc
<< 8 & 0xff00ff00);
944 crc
= (crc
>> 4 & 0x0f0f0f0f) | (crc
<< 4 & 0xf0f0f0f0);
945 crc
= (crc
>> 2 & 0x33333333) | (crc
<< 2 & 0xcccccccc);
946 crc
= (crc
>> 1 & 0x55555555) | (crc
<< 1 & 0xaaaaaaaa);
955 struct eth_device
*old_current
;
958 puts("No ethernet found.\n");
962 old_current
= eth_current
;
964 debug("Trying %s\n", eth_current
->name
);
966 if (eth_current
->init(eth_current
, gd
->bd
) >= 0) {
967 eth_current
->state
= ETH_STATE_ACTIVE
;
974 } while (old_current
!= eth_current
);
984 eth_current
->halt(eth_current
);
986 eth_current
->state
= ETH_STATE_PASSIVE
;
989 int eth_is_active(struct eth_device
*dev
)
991 return dev
&& dev
->state
== ETH_STATE_ACTIVE
;
994 int eth_send(void *packet
, int length
)
999 return eth_current
->send(eth_current
, packet
, length
);
1007 return eth_current
->recv(eth_current
);
1009 #endif /* ifndef CONFIG_DM_ETH */
1012 static void eth_save_packet(void *packet
, int length
)
1017 if ((eth_rcv_last
+1) % PKTBUFSRX
== eth_rcv_current
)
1020 if (PKTSIZE
< length
)
1023 for (i
= 0; i
< length
; i
++)
1024 eth_rcv_bufs
[eth_rcv_last
].data
[i
] = p
[i
];
1026 eth_rcv_bufs
[eth_rcv_last
].length
= length
;
1027 eth_rcv_last
= (eth_rcv_last
+ 1) % PKTBUFSRX
;
1030 int eth_receive(void *packet
, int length
)
1033 void *pp
= push_packet
;
1036 if (eth_rcv_current
== eth_rcv_last
) {
1037 push_packet
= eth_save_packet
;
1041 if (eth_rcv_current
== eth_rcv_last
)
1045 length
= min(eth_rcv_bufs
[eth_rcv_current
].length
, length
);
1047 for (i
= 0; i
< length
; i
++)
1048 p
[i
] = eth_rcv_bufs
[eth_rcv_current
].data
[i
];
1050 eth_rcv_current
= (eth_rcv_current
+ 1) % PKTBUFSRX
;
1053 #endif /* CONFIG_API */
1055 static void eth_current_changed(void)
1057 char *act
= getenv("ethact");
1061 * The call to eth_get_dev() below has a side effect of rotating
1062 * ethernet device if uc_priv->current == NULL. This is not what
1063 * we want when 'ethrotate' variable is 'no'.
1065 ethrotate
= getenv("ethrotate");
1066 if ((ethrotate
!= NULL
) && (strcmp(ethrotate
, "no") == 0))
1069 /* update current ethernet name */
1070 if (eth_get_dev()) {
1071 if (act
== NULL
|| strcmp(act
, eth_get_name()) != 0)
1072 setenv("ethact", eth_get_name());
1075 * remove the variable completely if there is no active
1078 else if (act
!= NULL
)
1079 setenv("ethact", NULL
);
1082 void eth_try_another(int first_restart
)
1084 static void *first_failed
;
1088 * Do not rotate between network interfaces when
1089 * 'ethrotate' variable is set to 'no'.
1091 ethrotate
= getenv("ethrotate");
1092 if ((ethrotate
!= NULL
) && (strcmp(ethrotate
, "no") == 0))
1099 first_failed
= eth_get_dev();
1101 eth_set_current_to_next();
1103 eth_current_changed();
1105 if (first_failed
== eth_get_dev())
1106 net_restart_wrap
= 1;
1109 void eth_set_current(void)
1112 static int env_changed_id
;
1115 env_id
= get_env_id();
1116 if ((act
== NULL
) || (env_changed_id
!= env_id
)) {
1117 act
= getenv("ethact");
1118 env_changed_id
= env_id
;
1122 char *ethprime
= getenv("ethprime");
1126 dev
= eth_get_dev_by_name(ethprime
);
1132 eth_set_dev(eth_get_dev_by_name(act
));
1135 eth_current_changed();
1138 const char *eth_get_name(void)
1140 return eth_get_dev() ? eth_get_dev()->name
: "unknown";