[u-boot.git] / net / eth_legacy.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * (C) Copyright 2001-2015
 * Wolfgang Denk, DENX Software Engineering, [email protected].
 * Joe Hershberger, National Instruments
 */

#include <common.h>
#include <bootstage.h>
#include <command.h>
#include <env.h>
#include <log.h>
#include <net.h>
#include <phy.h>
#include <linux/bug.h>
#include <linux/errno.h>
#include <net/pcap.h>
#include "eth_internal.h"

DECLARE_GLOBAL_DATA_PTR;

/*
 * CPU and board-specific Ethernet initializations.  Aliased function
 * signals caller to move on
 */
static int __def_eth_init(bd_t *bis)
{
	return -1;
}
int cpu_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));
int board_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));

#ifdef CONFIG_API
static struct {
	uchar data[PKTSIZE];
	int length;
} eth_rcv_bufs[PKTBUFSRX];

static unsigned int eth_rcv_current, eth_rcv_last;
#endif

static struct eth_device *eth_devices;
struct eth_device *eth_current;

void eth_set_current_to_next(void)
{
	eth_current = eth_current->next;
}

void eth_set_dev(struct eth_device *dev)
{
	eth_current = dev;
}

struct eth_device *eth_get_dev_by_name(const char *devname)
{
	struct eth_device *dev, *target_dev;

	BUG_ON(devname == NULL);

	if (!eth_devices)
		return NULL;

	dev = eth_devices;
	target_dev = NULL;
	do {
		if (strcmp(devname, dev->name) == 0) {
			target_dev = dev;
			break;
		}
		dev = dev->next;
	} while (dev != eth_devices);

	return target_dev;
}

struct eth_device *eth_get_dev_by_index(int index)
{
	struct eth_device *dev, *target_dev;

	if (!eth_devices)
		return NULL;

	dev = eth_devices;
	target_dev = NULL;
	do {
		if (dev->index == index) {
			target_dev = dev;
			break;
		}
		dev = dev->next;
	} while (dev != eth_devices);

	return target_dev;
}

int eth_get_dev_index(void)
{
	if (!eth_current)
		return -1;

	return eth_current->index;
}

static int on_ethaddr(const char *name, const char *value, enum env_op op,
	int flags)
{
	int index;
	struct eth_device *dev;

	if (!eth_devices)
		return 0;

	/* look for an index after "eth" */
	index = simple_strtoul(name + 3, NULL, 10);

	dev = eth_devices;
	do {
		if (dev->index == index) {
			switch (op) {
			case env_op_create:
			case env_op_overwrite:
				string_to_enetaddr(value, dev->enetaddr);
				eth_write_hwaddr(dev, "eth", dev->index);
				break;
			case env_op_delete:
				memset(dev->enetaddr, 0, ARP_HLEN);
			}
		}
		dev = dev->next;
	} while (dev != eth_devices);

	return 0;
}
U_BOOT_ENV_CALLBACK(ethaddr, on_ethaddr);

int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
		   int eth_number)
{
	unsigned char env_enetaddr[ARP_HLEN];
	int ret = 0;

	eth_env_get_enetaddr_by_index(base_name, eth_number, env_enetaddr);

	if (!is_zero_ethaddr(env_enetaddr)) {
		if (!is_zero_ethaddr(dev->enetaddr) &&
		    memcmp(dev->enetaddr, env_enetaddr, ARP_HLEN)) {
			printf("\nWarning: %s MAC addresses don't match:\n",
			       dev->name);
			printf("Address in SROM is         %pM\n",
			       dev->enetaddr);
			printf("Address in environment is  %pM\n",
			       env_enetaddr);
		}

		memcpy(dev->enetaddr, env_enetaddr, ARP_HLEN);
	} else if (is_valid_ethaddr(dev->enetaddr)) {
		eth_env_set_enetaddr_by_index(base_name, eth_number,
					      dev->enetaddr);
	} else if (is_zero_ethaddr(dev->enetaddr)) {
#ifdef CONFIG_NET_RANDOM_ETHADDR
		net_random_ethaddr(dev->enetaddr);
		printf("\nWarning: %s (eth%d) using random MAC address - %pM\n",
		       dev->name, eth_number, dev->enetaddr);
#else
		printf("\nError: %s address not set.\n",
		       dev->name);
		return -EINVAL;
#endif
	}

	if (dev->write_hwaddr && !eth_mac_skip(eth_number)) {
		if (!is_valid_ethaddr(dev->enetaddr)) {
			printf("\nError: %s address %pM illegal value\n",
			       dev->name, dev->enetaddr);
			return -EINVAL;
		}

		ret = dev->write_hwaddr(dev);
		if (ret)
			printf("\nWarning: %s failed to set MAC address\n",
			       dev->name);
	}

	return ret;
}

int eth_register(struct eth_device *dev)
{
	struct eth_device *d;
	static int index;

	assert(strlen(dev->name) < sizeof(dev->name));

	if (!eth_devices) {
		eth_devices = dev;
		eth_current = dev;
		eth_current_changed();
	} else {
		for (d = eth_devices; d->next != eth_devices; d = d->next)
			;
		d->next = dev;
	}

	dev->state = ETH_STATE_INIT;
	dev->next  = eth_devices;
	dev->index = index++;

	return 0;
}

int eth_unregister(struct eth_device *dev)
{
	struct eth_device *cur;

	/* No device */
	if (!eth_devices)
		return -ENODEV;

	for (cur = eth_devices; cur->next != eth_devices && cur->next != dev;
	     cur = cur->next)
		;

	/* Device not found */
	if (cur->next != dev)
		return -ENODEV;

	cur->next = dev->next;

	if (eth_devices == dev)
		eth_devices = dev->next == eth_devices ? NULL : dev->next;

	if (eth_current == dev) {
		eth_current = eth_devices;
		eth_current_changed();
	}

	return 0;
}

int eth_initialize(void)
{
	int num_devices = 0;

	eth_devices = NULL;
	eth_current = NULL;
	eth_common_init();
	/*
	 * If board-specific initialization exists, call it.
	 * If not, call a CPU-specific one
	 */
	if (board_eth_init != __def_eth_init) {
		if (board_eth_init(gd->bd) < 0)
			printf("Board Net Initialization Failed\n");
	} else if (cpu_eth_init != __def_eth_init) {
		if (cpu_eth_init(gd->bd) < 0)
			printf("CPU Net Initialization Failed\n");
	} else {
		printf("Net Initialization Skipped\n");
	}

	if (!eth_devices) {
		puts("No ethernet found.\n");
		bootstage_error(BOOTSTAGE_ID_NET_ETH_START);
	} else {
		struct eth_device *dev = eth_devices;
		char *ethprime = env_get("ethprime");

		bootstage_mark(BOOTSTAGE_ID_NET_ETH_INIT);
		do {
			if (dev->index)
				puts(", ");

			printf("%s", dev->name);

			if (ethprime && strcmp(dev->name, ethprime) == 0) {
				eth_current = dev;
				puts(" [PRIME]");
			}

			if (strchr(dev->name, ' '))
				puts("\nWarning: eth device name has a space!"
					"\n");

			eth_write_hwaddr(dev, "eth", dev->index);

			dev = dev->next;
			num_devices++;
		} while (dev != eth_devices);

		eth_current_changed();
		putc('\n');
	}

	return num_devices;
}

/* Multicast.
 * mcast_addr: multicast ipaddr from which multicast Mac is made
 * join: 1=join, 0=leave.
 */
int eth_mcast_join(struct in_addr mcast_ip, int join)
{
	u8 mcast_mac[ARP_HLEN];
	if (!eth_current || !eth_current->mcast)
		return -1;
	mcast_mac[5] = htonl(mcast_ip.s_addr) & 0xff;
	mcast_mac[4] = (htonl(mcast_ip.s_addr)>>8) & 0xff;
	mcast_mac[3] = (htonl(mcast_ip.s_addr)>>16) & 0x7f;
	mcast_mac[2] = 0x5e;
	mcast_mac[1] = 0x0;
	mcast_mac[0] = 0x1;
	return eth_current->mcast(eth_current, mcast_mac, join);
}

int eth_init(void)
{
	struct eth_device *old_current;

	if (!eth_current) {
		puts("No ethernet found.\n");
		return -ENODEV;
	}

	old_current = eth_current;
	do {
		debug("Trying %s\n", eth_current->name);

		if (eth_current->init(eth_current, gd->bd) >= 0) {
			eth_current->state = ETH_STATE_ACTIVE;

			return 0;
		}
		debug("FAIL\n");

		eth_try_another(0);
	} while (old_current != eth_current);

	return -ETIMEDOUT;
}

void eth_halt(void)
{
	if (!eth_current)
		return;

	eth_current->halt(eth_current);

	eth_current->state = ETH_STATE_PASSIVE;
}

int eth_is_active(struct eth_device *dev)
{
	return dev && dev->state == ETH_STATE_ACTIVE;
}

int eth_send(void *packet, int length)
{
	int ret;

	if (!eth_current)
		return -ENODEV;

	ret = eth_current->send(eth_current, packet, length);
#if defined(CONFIG_CMD_PCAP)
	if (ret >= 0)
		pcap_post(packet, lengeth, true);
#endif
	return ret;
}

int eth_rx(void)
{
	if (!eth_current)
		return -ENODEV;

	return eth_current->recv(eth_current);
}

#ifdef CONFIG_API
static void eth_save_packet(void *packet, int length)
{
	char *p = packet;
	int i;

	if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current)
		return;

	if (PKTSIZE < length)
		return;

	for (i = 0; i < length; i++)
		eth_rcv_bufs[eth_rcv_last].data[i] = p[i];

	eth_rcv_bufs[eth_rcv_last].length = length;
	eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX;
}

int eth_receive(void *packet, int length)
{
	char *p = packet;
	void *pp = push_packet;
	int i;

	if (eth_rcv_current == eth_rcv_last) {
		push_packet = eth_save_packet;
		eth_rx();
		push_packet = pp;

		if (eth_rcv_current == eth_rcv_last)
			return -1;
	}

	length = min(eth_rcv_bufs[eth_rcv_current].length, length);

	for (i = 0; i < length; i++)
		p[i] = eth_rcv_bufs[eth_rcv_current].data[i];

	eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX;
	return length;
}
#endif /* CONFIG_API */
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
c609719b	2	/*
05c3e68f	3	* (C) Copyright 2001-2015
c609719b	4	* Wolfgang Denk, DENX Software Engineering, [email protected].
05c3e68f	5	* Joe Hershberger, National Instruments
c609719b WD	6	*/
	7
	8	#include <common.h>
52f24238	9	#include <bootstage.h>
c609719b	10	#include <command.h>
9fb625ce	11	#include <env.h>
f7ae49fc	12	#include <log.h>
c609719b	13	#include <net.h>
5f184715	14	#include <phy.h>
eb41d8a1	15	#include <linux/bug.h>
1221ce45	16	#include <linux/errno.h>
3eaac630	17	#include <net/pcap.h>
818f91eb	18	#include "eth_internal.h"
c609719b	19
d2eaec60 JH	20	DECLARE_GLOBAL_DATA_PTR;
d2eaec60 JH	21
3bc42700 SG	22	/*
	23	* CPU and board-specific Ethernet initializations. Aliased function
	24	* signals caller to move on
	25	*/
	26	static int __def_eth_init(bd_t *bis)
	27	{
	28	return -1;
	29	}
	30	int cpu_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));
	31	int board_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));
	32
f85b6071	33	#ifdef CONFIG_API
f85b6071 RJ	34	static struct {
	35	uchar data[PKTSIZE];
	36	int length;
	37	} eth_rcv_bufs[PKTBUFSRX];
	38
66c7385a	39	static unsigned int eth_rcv_current, eth_rcv_last;
f85b6071 RJ	40	#endif
f85b6071 RJ	41
f8be7d65 JH	42	static struct eth_device *eth_devices;
f8be7d65 JH	43	struct eth_device *eth_current;
c609719b	44
8607a6bf	45	void eth_set_current_to_next(void)
84eb1fba JH	46	{
	47	eth_current = eth_current->next;
	48	}
	49
8607a6bf	50	void eth_set_dev(struct eth_device *dev)
e58780dc JH	51	{
	52	eth_current = dev;
	53	}
	54
d7fb9bcf	55	struct eth_device eth_get_dev_by_name(const char devname)
63ff004c MB	56	{
	57	struct eth_device dev, target_dev;
	58
7e7f903f HR	59	BUG_ON(devname == NULL);
7e7f903f HR	60
63ff004c MB	61	if (!eth_devices)
	62	return NULL;
	63
	64	dev = eth_devices;
	65	target_dev = NULL;
	66	do {
	67	if (strcmp(devname, dev->name) == 0) {
	68	target_dev = dev;
	69	break;
	70	}
	71	dev = dev->next;
	72	} while (dev != eth_devices);
	73
	74	return target_dev;
	75	}
	76
9e56986a AF	77	struct eth_device *eth_get_dev_by_index(int index)
	78	{
	79	struct eth_device dev, target_dev;
9e56986a AF	80
	81	if (!eth_devices)
	82	return NULL;
	83
	84	dev = eth_devices;
	85	target_dev = NULL;
	86	do {
fea7dcae	87	if (dev->index == index) {
9e56986a AF	88	target_dev = dev;
	89	break;
	90	}
	91	dev = dev->next;
9e56986a AF	92	} while (dev != eth_devices);
	93
	94	return target_dev;
	95	}
	96
66c7385a	97	int eth_get_dev_index(void)
c609719b	98	{
66c7385a	99	if (!eth_current)
fea7dcae	100	return -1;
c609719b	101
fea7dcae	102	return eth_current->index;
c609719b WD	103	}
c609719b WD	104
6e0d26c0 JH	105	static int on_ethaddr(const char name, const char value, enum env_op op,
	106	int flags)
	107	{
	108	int index;
	109	struct eth_device *dev;
	110
	111	if (!eth_devices)
	112	return 0;
	113
	114	/* look for an index after "eth" */
	115	index = simple_strtoul(name + 3, NULL, 10);
	116
	117	dev = eth_devices;
	118	do {
	119	if (dev->index == index) {
	120	switch (op) {
	121	case env_op_create:
	122	case env_op_overwrite:
fb8977c5	123	string_to_enetaddr(value, dev->enetaddr);
73d570a7	124	eth_write_hwaddr(dev, "eth", dev->index);
6e0d26c0 JH	125	break;
6e0d26c0 JH	126	case env_op_delete:
a40db6d5	127	memset(dev->enetaddr, 0, ARP_HLEN);
6e0d26c0 JH	128	}
6e0d26c0 JH	129	}
7aba0f2c	130	dev = dev->next;
6e0d26c0 JH	131	} while (dev != eth_devices);
	132
	133	return 0;
	134	}
	135	U_BOOT_ENV_CALLBACK(ethaddr, on_ethaddr);
	136
7616e785 SG	137	int eth_write_hwaddr(struct eth_device dev, const char base_name,
	138	int eth_number)
	139	{
a40db6d5	140	unsigned char env_enetaddr[ARP_HLEN];
7616e785 SG	141	int ret = 0;
7616e785 SG	142
35affd7a	143	eth_env_get_enetaddr_by_index(base_name, eth_number, env_enetaddr);
7616e785	144
0adb5b76 JH	145	if (!is_zero_ethaddr(env_enetaddr)) {
0adb5b76 JH	146	if (!is_zero_ethaddr(dev->enetaddr) &&
a40db6d5	147	memcmp(dev->enetaddr, env_enetaddr, ARP_HLEN)) {
7616e785	148	printf("\nWarning: %s MAC addresses don't match:\n",
ff819a3a	149	dev->name);
7616e785	150	printf("Address in SROM is %pM\n",
ff819a3a	151	dev->enetaddr);
7616e785	152	printf("Address in environment is %pM\n",
ff819a3a	153	env_enetaddr);
7616e785 SG	154	}
7616e785 SG	155
a40db6d5	156	memcpy(dev->enetaddr, env_enetaddr, ARP_HLEN);
0adb5b76	157	} else if (is_valid_ethaddr(dev->enetaddr)) {
fd1e959e SG	158	eth_env_set_enetaddr_by_index(base_name, eth_number,
fd1e959e SG	159	dev->enetaddr);
0adb5b76	160	} else if (is_zero_ethaddr(dev->enetaddr)) {
bef1014b JH	161	#ifdef CONFIG_NET_RANDOM_ETHADDR
	162	net_random_ethaddr(dev->enetaddr);
	163	printf("\nWarning: %s (eth%d) using random MAC address - %pM\n",
	164	dev->name, eth_number, dev->enetaddr);
	165	#else
75d9a45c PM	166	printf("\nError: %s address not set.\n",
	167	dev->name);
	168	return -EINVAL;
bef1014b	169	#endif
7616e785 SG	170	}
7616e785 SG	171
75d9a45c	172	if (dev->write_hwaddr && !eth_mac_skip(eth_number)) {
0adb5b76	173	if (!is_valid_ethaddr(dev->enetaddr)) {
75d9a45c	174	printf("\nError: %s address %pM illegal value\n",
ff819a3a	175	dev->name, dev->enetaddr);
75d9a45c PM	176	return -EINVAL;
75d9a45c PM	177	}
460f949f	178
7616e785	179	ret = dev->write_hwaddr(dev);
75d9a45c	180	if (ret)
ff819a3a JH	181	printf("\nWarning: %s failed to set MAC address\n",
ff819a3a JH	182	dev->name);
460f949f	183	}
7616e785 SG	184
	185	return ret;
	186	}
	187
89d48367 SG	188	int eth_register(struct eth_device *dev)
	189	{
	190	struct eth_device *d;
66c7385a	191	static int index;
58c583b6	192
f6add132	193	assert(strlen(dev->name) < sizeof(dev->name));
58c583b6	194
89d48367	195	if (!eth_devices) {
ff819a3a JH	196	eth_devices = dev;
ff819a3a JH	197	eth_current = dev;
89d48367	198	eth_current_changed();
c609719b	199	} else {
66c7385a	200	for (d = eth_devices; d->next != eth_devices; d = d->next)
aba4b69d	201	;
c609719b WD	202	d->next = dev;
	203	}
	204
	205	dev->state = ETH_STATE_INIT;
	206	dev->next = eth_devices;
fea7dcae	207	dev->index = index++;
c609719b WD	208
	209	return 0;
	210	}
	211
e7e982d6 VP	212	int eth_unregister(struct eth_device *dev)
	213	{
	214	struct eth_device *cur;
	215
	216	/* No device */
	217	if (!eth_devices)
05324a48	218	return -ENODEV;
e7e982d6 VP	219
	220	for (cur = eth_devices; cur->next != eth_devices && cur->next != dev;
	221	cur = cur->next)
	222	;
	223
	224	/* Device not found */
	225	if (cur->next != dev)
05324a48	226	return -ENODEV;
e7e982d6 VP	227
	228	cur->next = dev->next;
	229
	230	if (eth_devices == dev)
	231	eth_devices = dev->next == eth_devices ? NULL : dev->next;
	232
	233	if (eth_current == dev) {
	234	eth_current = eth_devices;
	235	eth_current_changed();
	236	}
	237
	238	return 0;
	239	}
	240
d2eaec60	241	int eth_initialize(void)
c609719b	242	{
fea7dcae	243	int num_devices = 0;
3bc42700	244
c609719b WD	245	eth_devices = NULL;
c609719b WD	246	eth_current = NULL;
3bc42700	247	eth_common_init();
818f91eb SG	248	/*
	249	* If board-specific initialization exists, call it.
	250	* If not, call a CPU-specific one
	251	*/
	252	if (board_eth_init != __def_eth_init) {
	253	if (board_eth_init(gd->bd) < 0)
	254	printf("Board Net Initialization Failed\n");
	255	} else if (cpu_eth_init != __def_eth_init) {
	256	if (cpu_eth_init(gd->bd) < 0)
	257	printf("CPU Net Initialization Failed\n");
	258	} else {
	259	printf("Net Initialization Skipped\n");
	260	}
d9785c14	261
c609719b	262	if (!eth_devices) {
66c7385a	263	puts("No ethernet found.\n");
770605e4	264	bootstage_error(BOOTSTAGE_ID_NET_ETH_START);
c609719b WD	265	} else {
c609719b WD	266	struct eth_device *dev = eth_devices;
00caae6d	267	char *ethprime = env_get("ethprime");
c609719b	268
770605e4	269	bootstage_mark(BOOTSTAGE_ID_NET_ETH_INIT);
c609719b	270	do {
fea7dcae	271	if (dev->index)
66c7385a	272	puts(", ");
c609719b WD	273
	274	printf("%s", dev->name);
	275
66c7385a	276	if (ethprime && strcmp(dev->name, ethprime) == 0) {
c609719b	277	eth_current = dev;
66c7385a	278	puts(" [PRIME]");
c609719b WD	279	}
c609719b WD	280
1384f3bb	281	if (strchr(dev->name, ' '))
66c7385a JH	282	puts("\nWarning: eth device name has a space!"
66c7385a JH	283	"\n");
1384f3bb	284
75d9a45c	285	eth_write_hwaddr(dev, "eth", dev->index);
c609719b	286
c609719b	287	dev = dev->next;
fea7dcae	288	num_devices++;
66c7385a	289	} while (dev != eth_devices);
c609719b	290
89d48367	291	eth_current_changed();
66c7385a	292	putc('\n');
c609719b WD	293	}
c609719b WD	294
fea7dcae	295	return num_devices;
c609719b WD	296	}
c609719b WD	297
53a5c424 DU	298	/* Multicast.
53a5c424 DU	299	* mcast_addr: multicast ipaddr from which multicast Mac is made
85eb5caf	300	* join: 1=join, 0=leave.
53a5c424	301	*/
049a95a7	302	int eth_mcast_join(struct in_addr mcast_ip, int join)
53a5c424	303	{
a40db6d5	304	u8 mcast_mac[ARP_HLEN];
85eb5caf	305	if (!eth_current \|\| !eth_current->mcast)
53a5c424	306	return -1;
049a95a7 JH	307	mcast_mac[5] = htonl(mcast_ip.s_addr) & 0xff;
	308	mcast_mac[4] = (htonl(mcast_ip.s_addr)>>8) & 0xff;
	309	mcast_mac[3] = (htonl(mcast_ip.s_addr)>>16) & 0x7f;
53a5c424 DU	310	mcast_mac[2] = 0x5e;
	311	mcast_mac[1] = 0x0;
	312	mcast_mac[0] = 0x1;
	313	return eth_current->mcast(eth_current, mcast_mac, join);
	314	}
	315
d2eaec60	316	int eth_init(void)
c609719b	317	{
6e0d26c0	318	struct eth_device *old_current;
c609719b	319
6bc11388	320	if (!eth_current) {
66c7385a	321	puts("No ethernet found.\n");
05324a48	322	return -ENODEV;
6bc11388	323	}
c609719b WD	324
	325	old_current = eth_current;
	326	do {
0ebf04c6	327	debug("Trying %s\n", eth_current->name);
c609719b	328
d2eaec60	329	if (eth_current->init(eth_current, gd->bd) >= 0) {
c609719b WD	330	eth_current->state = ETH_STATE_ACTIVE;
c609719b WD	331
505be87a	332	return 0;
c609719b	333	}
0ebf04c6	334	debug("FAIL\n");
c609719b WD	335
	336	eth_try_another(0);
	337	} while (old_current != eth_current);
	338
05324a48	339	return -ETIMEDOUT;
c609719b WD	340	}
	341
	342	void eth_halt(void)
	343	{
	344	if (!eth_current)
	345	return;
	346
	347	eth_current->halt(eth_current);
	348
	349	eth_current->state = ETH_STATE_PASSIVE;
	350	}
	351
eaa8a195 BN	352	int eth_is_active(struct eth_device *dev)
	353	{
	354	return dev && dev->state == ETH_STATE_ACTIVE;
	355	}
	356
db288a96	357	int eth_send(void *packet, int length)
c609719b	358	{
3eaac630 RF	359	int ret;
3eaac630 RF	360
c609719b	361	if (!eth_current)
05324a48	362	return -ENODEV;
c609719b	363
3eaac630 RF	364	ret = eth_current->send(eth_current, packet, length);
	365	#if defined(CONFIG_CMD_PCAP)
	366	if (ret >= 0)
	367	pcap_post(packet, lengeth, true);
	368	#endif
	369	return ret;
c609719b WD	370	}
	371
	372	int eth_rx(void)
	373	{
	374	if (!eth_current)
05324a48	375	return -ENODEV;
c609719b WD	376
	377	return eth_current->recv(eth_current);
	378	}
	379
f85b6071	380	#ifdef CONFIG_API
db288a96	381	static void eth_save_packet(void *packet, int length)
f85b6071	382	{
db288a96	383	char *p = packet;
f85b6071 RJ	384	int i;
	385
	386	if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current)
	387	return;
	388
	389	if (PKTSIZE < length)
	390	return;
	391
	392	for (i = 0; i < length; i++)
	393	eth_rcv_bufs[eth_rcv_last].data[i] = p[i];
	394
	395	eth_rcv_bufs[eth_rcv_last].length = length;
	396	eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX;
	397	}
	398
db288a96	399	int eth_receive(void *packet, int length)
f85b6071	400	{
db288a96	401	char *p = packet;
f85b6071 RJ	402	void *pp = push_packet;
	403	int i;
	404
	405	if (eth_rcv_current == eth_rcv_last) {
	406	push_packet = eth_save_packet;
	407	eth_rx();
	408	push_packet = pp;
	409
	410	if (eth_rcv_current == eth_rcv_last)
	411	return -1;
	412	}
	413
46c07bcf	414	length = min(eth_rcv_bufs[eth_rcv_current].length, length);
f85b6071 RJ	415
	416	for (i = 0; i < length; i++)
	417	p[i] = eth_rcv_bufs[eth_rcv_current].data[i];
	418
	419	eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX;
	420	return length;
	421	}
	422	#endif /* CONFIG_API */