/*-
* Copyright (c) 2000-2001 Benno Rice
* Copyright (c) 2007 Semihalf, Rafal Jaworowski <raj@semihalf.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/param.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/if_ether.h>
#include <netinet/ip.h>
#include <stand.h>
#include <net.h>
#include <netif.h>
#include "api_public.h"
#include "glue.h"
#include "libuboot.h"
#include "dev_net.h"
static int net_probe(struct netif *, void *);
static int net_match(struct netif *, void *);
static void net_init(struct iodesc *, void *);
static ssize_t net_get(struct iodesc *, void **, time_t);
static ssize_t net_put(struct iodesc *, void *, size_t);
static void net_end(struct netif *);
extern struct netif_stats net_stats[];
struct netif_dif net_ifs[] = {
/* dif_unit dif_nsel dif_stats dif_private */
{ 0, 1, &net_stats[0], 0, },
};
struct netif_stats net_stats[nitems(net_ifs)];
struct netif_driver uboot_net = {
"uboot_eth", /* netif_bname */
net_match, /* netif_match */
net_probe, /* netif_probe */
net_init, /* netif_init */
net_get, /* netif_get */
net_put, /* netif_put */
net_end, /* netif_end */
net_ifs, /* netif_ifs */
nitems(net_ifs) /* netif_nifs */
};
struct uboot_softc {
uint32_t sc_pad;
uint8_t sc_rxbuf[ETHER_MAX_LEN];
uint8_t sc_txbuf[ETHER_MAX_LEN + PKTALIGN];
uint8_t *sc_txbufp;
int sc_handle; /* device handle for ub_dev_xxx */
};
static struct uboot_softc uboot_softc;
/*
* get_env_net_params()
*
* Attempt to obtain all the parms we need for netbooting from the U-Boot
* environment. If we fail to obtain the values it may still be possible to
* netboot; the net_dev code will attempt to get the values from bootp, rarp,
* and other such sources.
*
* If rootip.s_addr is non-zero net_dev assumes the required global variables
* are set and skips the bootp inquiry. For that reason, we don't set rootip
* until we've verified that we have at least the minimum required info.
*
* This is called from netif_init() which can result in it getting called
* multiple times, by design. The network code at higher layers zeroes out
* rootip when it closes a network interface, so if it gets opened again we have
* to obtain all this info again.
*/
static void
get_env_net_params(void)
{
char *envstr;
in_addr_t rootaddr, serveraddr;
/*
* Silently get out right away if we don't have rootpath, because none
* of the other info we obtain below is sufficient to boot without it.
*
* If we do have rootpath, copy it into the global var and also set
* dhcp.root-path in the env. If we don't get all the other info from
* the u-boot env below, we will still try dhcp/bootp, but the server-
* provided path will not replace the user-provided value we set here.
*/
if ((envstr = ub_env_get("rootpath")) == NULL)
return;
strlcpy(rootpath, envstr, sizeof(rootpath));
setenv("dhcp.root-path", rootpath, 0);
/*
* Our own IP address must be valid. Silently get out if it's not set,
* but whine if it's there and we can't parse it.
*/
if ((envstr = ub_env_get("ipaddr")) == NULL)
return;
if ((myip.s_addr = inet_addr(envstr)) == INADDR_NONE) {
printf("Could not parse ipaddr '%s'\n", envstr);
return;
}
/*
* Netmask is optional, default to the "natural" netmask for our IP, but
* whine if it was provided and we couldn't parse it.
*/
if ((envstr = ub_env_get("netmask")) != NULL &&
(netmask = inet_addr(envstr)) == INADDR_NONE) {
printf("Could not parse netmask '%s'\n", envstr);
}
if (netmask == INADDR_NONE) {
if (IN_CLASSA(myip.s_addr))
netmask = IN_CLASSA_NET;
else if (IN_CLASSB(myip.s_addr))
netmask = IN_CLASSB_NET;
else
netmask = IN_CLASSC_NET;
}
/*
* Get optional serverip before rootpath; the latter can override it.
* Whine only if it's present but can't be parsed.
*/
serveraddr = INADDR_NONE;
if ((envstr = ub_env_get("serverip")) != NULL) {
if ((serveraddr = inet_addr(envstr)) == INADDR_NONE)
printf("Could not parse serverip '%s'\n", envstr);
}
/*
* There must be a rootpath. It may be ip:/path or it may be just the
* path in which case the ip needs to be in serverip.
*/
rootaddr = net_parse_rootpath();
if (rootaddr == INADDR_NONE)
rootaddr = serveraddr;
if (rootaddr == INADDR_NONE) {
printf("No server address for rootpath '%s'\n", envstr);
return;
}
rootip.s_addr = rootaddr;
/*
* Gateway IP is optional unless rootip is on a different net in which
* case whine if it's missing or we can't parse it, and set rootip addr
* to zero, which signals to other network code that network params
* aren't set (so it will try dhcp, bootp, etc).
*/
envstr = ub_env_get("gatewayip");
if (!SAMENET(myip, rootip, netmask)) {
if (envstr == NULL) {
printf("Need gatewayip for a root server on a "
"different network.\n");
rootip.s_addr = 0;
return;
}
if ((gateip.s_addr = inet_addr(envstr)) == INADDR_NONE) {
printf("Could not parse gatewayip '%s'\n", envstr);
rootip.s_addr = 0;
return;
}
}
}
static int
net_match(struct netif *nif, void *machdep_hint)
{
char **a = (char **)machdep_hint;
if (memcmp("net", *a, 3) == 0)
return (1);
printf("net_match: could not match network device\n");
return (0);
}
static int
net_probe(struct netif *nif, void *machdep_hint)
{
struct device_info *di;
int i;
for (i = 0; i < devs_no; i++)
if ((di = ub_dev_get(i)) != NULL)
if (di->type == DEV_TYP_NET)
break;
if (i == devs_no) {
printf("net_probe: no network devices found, maybe not"
" enumerated yet..?\n");
return (-1);
}
#if defined(NETIF_DEBUG)
printf("net_probe: network device found: %d\n", i);
#endif
uboot_softc.sc_handle = i;
return (0);
}
static ssize_t
net_put(struct iodesc *desc, void *pkt, size_t len)
{
struct netif *nif = desc->io_netif;
struct uboot_softc *sc = nif->nif_devdata;
size_t sendlen;
ssize_t rv;
#if defined(NETIF_DEBUG)
struct ether_header *eh;
printf("net_put: desc %p, pkt %p, len %d\n", desc, pkt, len);
eh = pkt;
printf("dst: %s ", ether_sprintf(eh->ether_dhost));
printf("src: %s ", ether_sprintf(eh->ether_shost));
printf("type: 0x%x\n", eh->ether_type & 0xffff);
#endif
if (len < ETHER_MIN_LEN - ETHER_CRC_LEN) {
sendlen = ETHER_MIN_LEN - ETHER_CRC_LEN;
bzero(sc->sc_txbufp, sendlen);
} else
sendlen = len;
memcpy(sc->sc_txbufp, pkt, len);
rv = ub_dev_send(sc->sc_handle, sc->sc_txbufp, sendlen);
#if defined(NETIF_DEBUG)
printf("net_put: ub_send returned %d\n", rv);
#endif
if (rv == 0)
rv = len;
else
rv = -1;
return (rv);
}
static ssize_t
net_get(struct iodesc *desc, void **pkt, time_t timeout)
{
struct netif *nif = desc->io_netif;
struct uboot_softc *sc = nif->nif_devdata;
time_t t;
int err, rlen;
size_t len;
char *buf;
#if defined(NETIF_DEBUG)
printf("net_get: pkt %p, timeout %d\n", pkt, timeout);
#endif
t = getsecs();
len = sizeof(sc->sc_rxbuf);
do {
err = ub_dev_recv(sc->sc_handle, sc->sc_rxbuf, len, &rlen);
if (err != 0) {
printf("net_get: ub_dev_recv() failed, error=%d\n",
err);
rlen = 0;
break;
}
} while ((rlen == -1 || rlen == 0) && (getsecs() - t < timeout));
#if defined(NETIF_DEBUG)
printf("net_get: received len %d (%x)\n", rlen, rlen);
#endif
if (rlen > 0) {
buf = malloc(rlen + ETHER_ALIGN);
if (buf == NULL)
return (-1);
memcpy(buf + ETHER_ALIGN, sc->sc_rxbuf, rlen);
*pkt = buf;
return ((ssize_t)rlen);
}
return (-1);
}
static void
net_init(struct iodesc *desc, void *machdep_hint)
{
struct netif *nif = desc->io_netif;
struct uboot_softc *sc;
struct device_info *di;
int err;
sc = nif->nif_devdata = &uboot_softc;
if ((err = ub_dev_open(sc->sc_handle)) != 0)
panic("%s%d: initialisation failed with error %d",
nif->nif_driver->netif_bname, nif->nif_unit, err);
/* Get MAC address */
di = ub_dev_get(sc->sc_handle);
memcpy(desc->myea, di->di_net.hwaddr, 6);
if (memcmp (desc->myea, "\0\0\0\0\0\0", 6) == 0) {
panic("%s%d: empty ethernet address!",
nif->nif_driver->netif_bname, nif->nif_unit);
}
/* Attempt to get netboot params from the u-boot env. */
get_env_net_params();
if (myip.s_addr != 0)
desc->myip = myip;
#if defined(NETIF_DEBUG)
printf("network: %s%d attached to %s\n", nif->nif_driver->netif_bname,
nif->nif_unit, ether_sprintf(desc->myea));
#endif
/* Set correct alignment for TX packets */
sc->sc_txbufp = sc->sc_txbuf;
if ((unsigned long)sc->sc_txbufp % PKTALIGN)
sc->sc_txbufp += PKTALIGN -
(unsigned long)sc->sc_txbufp % PKTALIGN;
}
static void
net_end(struct netif *nif)
{
struct uboot_softc *sc = nif->nif_devdata;
int err;
if ((err = ub_dev_close(sc->sc_handle)) != 0)
panic("%s%d: net_end failed with error %d",
nif->nif_driver->netif_bname, nif->nif_unit, err);
}
