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authorChris Zankel <chris@zankel.net>2007-09-13 13:44:07 -0700
committerChris Zankel <chris@zankel.net>2008-02-13 16:45:06 -0800
commitb26d0ab0e6fa3a886d2799bf89eb05dd52f8b7c2 (patch)
treea602dca2464a59d1f230639b95885b3e04913091 /arch/xtensa/platform-iss/network.c
parent4f8d98ff4825336b23372bb552852625fc90d3b1 (diff)
[XTENSA] Concentrate platforms into one platforms directory.
Create arch/xtensa/platforms/ directory to concentrate all platforms under that subdirectory and moves the ISS platform to that directory. Signed-off-by: Chris Zankel <chris@zankel.net>
Diffstat (limited to 'arch/xtensa/platform-iss/network.c')
-rw-r--r--arch/xtensa/platform-iss/network.c822
1 files changed, 0 insertions, 822 deletions
diff --git a/arch/xtensa/platform-iss/network.c b/arch/xtensa/platform-iss/network.c
deleted file mode 100644
index d89fb18d797..00000000000
--- a/arch/xtensa/platform-iss/network.c
+++ /dev/null
@@ -1,822 +0,0 @@
-/*
- *
- * arch/xtensa/platform-iss/network.c
- *
- * Platform specific initialization.
- *
- * Authors: Chris Zankel <chris@zankel.net>
- * Based on work form the UML team.
- *
- * Copyright 2005 Tensilica Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- */
-
-#include <linux/list.h>
-#include <linux/irq.h>
-#include <linux/spinlock.h>
-#include <linux/slab.h>
-#include <linux/timer.h>
-#include <linux/if_ether.h>
-#include <linux/inetdevice.h>
-#include <linux/init.h>
-#include <linux/if_tun.h>
-#include <linux/etherdevice.h>
-#include <linux/interrupt.h>
-#include <linux/ioctl.h>
-#include <linux/bootmem.h>
-#include <linux/ethtool.h>
-#include <linux/rtnetlink.h>
-#include <linux/platform_device.h>
-
-#include <asm/platform/simcall.h>
-
-#define DRIVER_NAME "iss-netdev"
-#define ETH_MAX_PACKET 1500
-#define ETH_HEADER_OTHER 14
-#define ISS_NET_TIMER_VALUE (2 * HZ)
-
-
-static DEFINE_SPINLOCK(opened_lock);
-static LIST_HEAD(opened);
-
-static DEFINE_SPINLOCK(devices_lock);
-static LIST_HEAD(devices);
-
-/* ------------------------------------------------------------------------- */
-
-/* We currently only support the TUNTAP transport protocol. */
-
-#define TRANSPORT_TUNTAP_NAME "tuntap"
-#define TRANSPORT_TUNTAP_MTU ETH_MAX_PACKET
-
-struct tuntap_info {
- char dev_name[IFNAMSIZ];
- int fixed_config;
- unsigned char gw[ETH_ALEN];
- int fd;
-};
-
-/* ------------------------------------------------------------------------- */
-
-
-/* This structure contains out private information for the driver. */
-
-struct iss_net_private {
-
- struct list_head device_list;
- struct list_head opened_list;
-
- spinlock_t lock;
- struct net_device *dev;
- struct platform_device pdev;
- struct timer_list tl;
- struct net_device_stats stats;
-
- struct timer_list timer;
- unsigned int timer_val;
-
- int index;
- int mtu;
-
- unsigned char mac[ETH_ALEN];
- int have_mac;
-
- struct {
- union {
- struct tuntap_info tuntap;
- } info;
-
- int (*open)(struct iss_net_private *lp);
- void (*close)(struct iss_net_private *lp);
- int (*read)(struct iss_net_private *lp, struct sk_buff **skb);
- int (*write)(struct iss_net_private *lp, struct sk_buff **skb);
- unsigned short (*protocol)(struct sk_buff *skb);
- int (*poll)(struct iss_net_private *lp);
- } tp;
-
-};
-
-/* ======================= ISS SIMCALL INTERFACE =========================== */
-
-/* Note: __simc must _not_ be declared inline! */
-
-static int errno;
-
-static int __simc (int a, int b, int c, int d, int e, int f)
-{
- int ret;
- __asm__ __volatile__ ("simcall\n"
- "mov %0, a2\n"
- "mov %1, a3\n" : "=a" (ret), "=a" (errno)
- : : "a2", "a3");
- return ret;
-}
-
-static int inline simc_open(char *file, int flags, int mode)
-{
- return __simc(SYS_open, (int) file, flags, mode, 0, 0);
-}
-
-static int inline simc_close(int fd)
-{
- return __simc(SYS_close, fd, 0, 0, 0, 0);
-}
-
-static int inline simc_ioctl(int fd, int request, void *arg)
-{
- return __simc(SYS_ioctl, fd, request, (int) arg, 0, 0);
-}
-
-static int inline simc_read(int fd, void *buf, size_t count)
-{
- return __simc(SYS_read, fd, (int) buf, count, 0, 0);
-}
-
-static int inline simc_write(int fd, void *buf, size_t count)
-{
- return __simc(SYS_write, fd, (int) buf, count, 0, 0);
-}
-
-static int inline simc_poll(int fd)
-{
- struct timeval tv = { .tv_sec = 0, .tv_usec = 0 };
-
- return __simc(SYS_select_one, fd, XTISS_SELECT_ONE_READ, (int)&tv,0,0);
-}
-
-/* ================================ HELPERS ================================ */
-
-
-static char *split_if_spec(char *str, ...)
-{
- char **arg, *end;
- va_list ap;
-
- va_start(ap, str);
- while ((arg = va_arg(ap, char**)) != NULL) {
- if (*str == '\0')
- return NULL;
- end = strchr(str, ',');
- if (end != str)
- *arg = str;
- if (end == NULL)
- return NULL;
- *end ++ = '\0';
- str = end;
- }
- va_end(ap);
- return str;
-}
-
-
-#if 0
-/* Adjust SKB. */
-
-struct sk_buff *ether_adjust_skb(struct sk_buff *skb, int extra)
-{
- if ((skb != NULL) && (skb_tailroom(skb) < extra)) {
- struct sk_buff *skb2;
-
- skb2 = skb_copy_expand(skb, 0, extra, GFP_ATOMIC);
- dev_kfree_skb(skb);
- skb = skb2;
- }
- if (skb != NULL)
- skb_put(skb, extra);
-
- return skb;
-}
-#endif
-
-/* Return the IP address as a string for a given device. */
-
-static void dev_ip_addr(void *d, char *buf, char *bin_buf)
-{
- struct net_device *dev = d;
- struct in_device *ip = dev->ip_ptr;
- struct in_ifaddr *in;
- __be32 addr;
-
- if ((ip == NULL) || ((in = ip->ifa_list) == NULL)) {
- printk(KERN_WARNING "Device not assigned an IP address!\n");
- return;
- }
-
- addr = in->ifa_address;
- sprintf(buf, "%d.%d.%d.%d", addr & 0xff, (addr >> 8) & 0xff,
- (addr >> 16) & 0xff, addr >> 24);
-
- if (bin_buf) {
- bin_buf[0] = addr & 0xff;
- bin_buf[1] = (addr >> 8) & 0xff;
- bin_buf[2] = (addr >> 16) & 0xff;
- bin_buf[3] = addr >> 24;
- }
-}
-
-/* Set Ethernet address of the specified device. */
-
-static void inline set_ether_mac(void *d, unsigned char *addr)
-{
- struct net_device *dev = d;
- memcpy(dev->dev_addr, addr, ETH_ALEN);
-}
-
-
-/* ======================= TUNTAP TRANSPORT INTERFACE ====================== */
-
-static int tuntap_open(struct iss_net_private *lp)
-{
- struct ifreq ifr;
- char *dev_name = lp->tp.info.tuntap.dev_name;
- int err = -EINVAL;
- int fd;
-
- /* We currently only support a fixed configuration. */
-
- if (!lp->tp.info.tuntap.fixed_config)
- return -EINVAL;
-
- if ((fd = simc_open("/dev/net/tun", 02, 0)) < 0) { /* O_RDWR */
- printk("Failed to open /dev/net/tun, returned %d "
- "(errno = %d)\n", fd, errno);
- return fd;
- }
-
- memset(&ifr, 0, sizeof ifr);
- ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
- strlcpy(ifr.ifr_name, dev_name, sizeof ifr.ifr_name);
-
- if ((err = simc_ioctl(fd, TUNSETIFF, (void*) &ifr)) < 0) {
- printk("Failed to set interface, returned %d "
- "(errno = %d)\n", err, errno);
- simc_close(fd);
- return err;
- }
-
- lp->tp.info.tuntap.fd = fd;
- return err;
-}
-
-static void tuntap_close(struct iss_net_private *lp)
-{
-#if 0
- if (lp->tp.info.tuntap.fixed_config)
- iter_addresses(lp->tp.info.tuntap.dev, close_addr, lp->host.dev_name);
-#endif
- simc_close(lp->tp.info.tuntap.fd);
- lp->tp.info.tuntap.fd = -1;
-}
-
-static int tuntap_read (struct iss_net_private *lp, struct sk_buff **skb)
-{
-#if 0
- *skb = ether_adjust_skb(*skb, ETH_HEADER_OTHER);
- if (*skb == NULL)
- return -ENOMEM;
-#endif
-
- return simc_read(lp->tp.info.tuntap.fd,
- (*skb)->data, (*skb)->dev->mtu + ETH_HEADER_OTHER);
-}
-
-static int tuntap_write (struct iss_net_private *lp, struct sk_buff **skb)
-{
- return simc_write(lp->tp.info.tuntap.fd, (*skb)->data, (*skb)->len);
-}
-
-unsigned short tuntap_protocol(struct sk_buff *skb)
-{
- return eth_type_trans(skb, skb->dev);
-}
-
-static int tuntap_poll(struct iss_net_private *lp)
-{
- return simc_poll(lp->tp.info.tuntap.fd);
-}
-
-/*
- * Currently only a device name is supported.
- * ethX=tuntap[,[mac address][,[device name]]]
- */
-
-static int tuntap_probe(struct iss_net_private *lp, int index, char *init)
-{
- const int len = strlen(TRANSPORT_TUNTAP_NAME);
- char *dev_name = NULL, *mac_str = NULL, *rem = NULL;
-
- /* Transport should be 'tuntap': ethX=tuntap,mac,dev_name */
-
- if (strncmp(init, TRANSPORT_TUNTAP_NAME, len))
- return 0;
-
- if (*(init += strlen(TRANSPORT_TUNTAP_NAME)) == ',') {
- if ((rem=split_if_spec(init+1, &mac_str, &dev_name)) != NULL) {
- printk("Extra garbage on specification : '%s'\n", rem);
- return 0;
- }
- } else if (*init != '\0') {
- printk("Invalid argument: %s. Skipping device!\n", init);
- return 0;
- }
-
- if (dev_name) {
- strncpy(lp->tp.info.tuntap.dev_name, dev_name,
- sizeof lp->tp.info.tuntap.dev_name);
- lp->tp.info.tuntap.fixed_config = 1;
- } else
- strcpy(lp->tp.info.tuntap.dev_name, TRANSPORT_TUNTAP_NAME);
-
-
-#if 0
- if (setup_etheraddr(mac_str, lp->mac))
- lp->have_mac = 1;
-#endif
- lp->mtu = TRANSPORT_TUNTAP_MTU;
-
- //lp->info.tuntap.gate_addr = gate_addr;
-
- lp->tp.info.tuntap.fd = -1;
-
- lp->tp.open = tuntap_open;
- lp->tp.close = tuntap_close;
- lp->tp.read = tuntap_read;
- lp->tp.write = tuntap_write;
- lp->tp.protocol = tuntap_protocol;
- lp->tp.poll = tuntap_poll;
-
- printk("TUN/TAP backend - ");
-#if 0
- if (lp->host.gate_addr != NULL)
- printk("IP = %s", lp->host.gate_addr);
-#endif
- printk("\n");
-
- return 1;
-}
-
-/* ================================ ISS NET ================================ */
-
-static int iss_net_rx(struct net_device *dev)
-{
- struct iss_net_private *lp = dev->priv;
- int pkt_len;
- struct sk_buff *skb;
-
- /* Check if there is any new data. */
-
- if (lp->tp.poll(lp) == 0)
- return 0;
-
- /* Try to allocate memory, if it fails, try again next round. */
-
- if ((skb = dev_alloc_skb(dev->mtu + 2 + ETH_HEADER_OTHER)) == NULL) {
- lp->stats.rx_dropped++;
- return 0;
- }
-
- skb_reserve(skb, 2);
-
- /* Setup skb */
-
- skb->dev = dev;
- skb_reset_mac_header(skb);
- pkt_len = lp->tp.read(lp, &skb);
- skb_put(skb, pkt_len);
-
- if (pkt_len > 0) {
- skb_trim(skb, pkt_len);
- skb->protocol = lp->tp.protocol(skb);
-
- lp->stats.rx_bytes += skb->len;
- lp->stats.rx_packets++;
- // netif_rx(skb);
- netif_rx_ni(skb);
- return pkt_len;
- }
- kfree_skb(skb);
- return pkt_len;
-}
-
-static int iss_net_poll(void)
-{
- struct list_head *ele;
- int err, ret = 0;
-
- spin_lock(&opened_lock);
-
- list_for_each(ele, &opened) {
- struct iss_net_private *lp;
-
- lp = list_entry(ele, struct iss_net_private, opened_list);
-
- if (!netif_running(lp->dev))
- break;
-
- spin_lock(&lp->lock);
-
- while ((err = iss_net_rx(lp->dev)) > 0)
- ret++;
-
- spin_unlock(&lp->lock);
-
- if (err < 0) {
- printk(KERN_ERR "Device '%s' read returned %d, "
- "shutting it down\n", lp->dev->name, err);
- dev_close(lp->dev);
- } else {
- // FIXME reactivate_fd(lp->fd, ISS_ETH_IRQ);
- }
- }
-
- spin_unlock(&opened_lock);
- return ret;
-}
-
-
-static void iss_net_timer(unsigned long priv)
-{
- struct iss_net_private* lp = (struct iss_net_private*) priv;
-
- spin_lock(&lp->lock);
-
- iss_net_poll();
-
- mod_timer(&lp->timer, jiffies + lp->timer_val);
-
- spin_unlock(&lp->lock);
-}
-
-
-static int iss_net_open(struct net_device *dev)
-{
- struct iss_net_private *lp = dev->priv;
- char addr[sizeof "255.255.255.255\0"];
- int err;
-
- spin_lock(&lp->lock);
-
- if ((err = lp->tp.open(lp)) < 0)
- goto out;
-
- if (!lp->have_mac) {
- dev_ip_addr(dev, addr, &lp->mac[2]);
- set_ether_mac(dev, lp->mac);
- }
-
- netif_start_queue(dev);
-
- /* clear buffer - it can happen that the host side of the interface
- * is full when we get here. In this case, new data is never queued,
- * SIGIOs never arrive, and the net never works.
- */
- while ((err = iss_net_rx(dev)) > 0)
- ;
-
- spin_lock(&opened_lock);
- list_add(&lp->opened_list, &opened);
- spin_unlock(&opened_lock);
-
- init_timer(&lp->timer);
- lp->timer_val = ISS_NET_TIMER_VALUE;
- lp->timer.data = (unsigned long) lp;
- lp->timer.function = iss_net_timer;
- mod_timer(&lp->timer, jiffies + lp->timer_val);
-
-out:
- spin_unlock(&lp->lock);
- return err;
-}
-
-static int iss_net_close(struct net_device *dev)
-{
- struct iss_net_private *lp = dev->priv;
-printk("iss_net_close!\n");
- netif_stop_queue(dev);
- spin_lock(&lp->lock);
-
- spin_lock(&opened_lock);
- list_del(&opened);
- spin_unlock(&opened_lock);
-
- del_timer_sync(&lp->timer);
-
- lp->tp.close(lp);
-
- spin_unlock(&lp->lock);
- return 0;
-}
-
-static int iss_net_start_xmit(struct sk_buff *skb, struct net_device *dev)
-{
- struct iss_net_private *lp = dev->priv;
- unsigned long flags;
- int len;
-
- netif_stop_queue(dev);
- spin_lock_irqsave(&lp->lock, flags);
-
- len = lp->tp.write(lp, &skb);
-
- if (len == skb->len) {
- lp->stats.tx_packets++;
- lp->stats.tx_bytes += skb->len;
- dev->trans_start = jiffies;
- netif_start_queue(dev);
-
- /* this is normally done in the interrupt when tx finishes */
- netif_wake_queue(dev);
-
- } else if (len == 0) {
- netif_start_queue(dev);
- lp->stats.tx_dropped++;
-
- } else {
- netif_start_queue(dev);
- printk(KERN_ERR "iss_net_start_xmit: failed(%d)\n", len);
- }
-
- spin_unlock_irqrestore(&lp->lock, flags);
-
- dev_kfree_skb(skb);
- return 0;
-}
-
-
-static struct net_device_stats *iss_net_get_stats(struct net_device *dev)
-{
- struct iss_net_private *lp = dev->priv;
- return &lp->stats;
-}
-
-static void iss_net_set_multicast_list(struct net_device *dev)
-{
-#if 0
- if (dev->flags & IFF_PROMISC)
- return;
- else if (dev->mc_count)
- dev->flags |= IFF_ALLMULTI;
- else
- dev->flags &= ~IFF_ALLMULTI;
-#endif
-}
-
-static void iss_net_tx_timeout(struct net_device *dev)
-{
-#if 0
- dev->trans_start = jiffies;
- netif_wake_queue(dev);
-#endif
-}
-
-static int iss_net_set_mac(struct net_device *dev, void *addr)
-{
-#if 0
- struct iss_net_private *lp = dev->priv;
- struct sockaddr *hwaddr = addr;
-
- spin_lock(&lp->lock);
- memcpy(dev->dev_addr, hwaddr->sa_data, ETH_ALEN);
- spin_unlock(&lp->lock);
-#endif
-
- return 0;
-}
-
-static int iss_net_change_mtu(struct net_device *dev, int new_mtu)
-{
-#if 0
- struct iss_net_private *lp = dev->priv;
- int err = 0;
-
- spin_lock(&lp->lock);
-
- // FIXME not needed new_mtu = transport_set_mtu(new_mtu, &lp->user);
-
- if (new_mtu < 0)
- err = new_mtu;
- else
- dev->mtu = new_mtu;
-
- spin_unlock(&lp->lock);
- return err;
-#endif
- return -EINVAL;
-}
-
-void iss_net_user_timer_expire(unsigned long _conn)
-{
-}
-
-
-static struct platform_driver iss_net_driver = {
- .driver = {
- .name = DRIVER_NAME,
- },
-};
-
-static int driver_registered;
-
-static int iss_net_configure(int index, char *init)
-{
- struct net_device *dev;
- struct iss_net_private *lp;
- int err;
-
- if ((dev = alloc_etherdev(sizeof *lp)) == NULL) {
- printk(KERN_ERR "eth_configure: failed to allocate device\n");
- return 1;
- }
-
- /* Initialize private element. */
-
- lp = dev->priv;
- *lp = ((struct iss_net_private) {
- .device_list = LIST_HEAD_INIT(lp->device_list),
- .opened_list = LIST_HEAD_INIT(lp->opened_list),
- .lock = SPIN_LOCK_UNLOCKED,
- .dev = dev,
- .index = index,
- //.fd = -1,
- .mac = { 0xfe, 0xfd, 0x0, 0x0, 0x0, 0x0 },
- .have_mac = 0,
- });
-
- /*
- * Try all transport protocols.
- * Note: more protocols can be added by adding '&& !X_init(lp, eth)'.
- */
-
- if (!tuntap_probe(lp, index, init)) {
- printk("Invalid arguments. Skipping device!\n");
- goto errout;
- }
-
- printk(KERN_INFO "Netdevice %d ", index);
- if (lp->have_mac)
- printk("(%02x:%02x:%02x:%02x:%02x:%02x) ",
- lp->mac[0], lp->mac[1],
- lp->mac[2], lp->mac[3],
- lp->mac[4], lp->mac[5]);
- printk(": ");
-
- /* sysfs register */
-
- if (!driver_registered) {
- platform_driver_register(&iss_net_driver);
- driver_registered = 1;
- }
-
- spin_lock(&devices_lock);
- list_add(&lp->device_list, &devices);
- spin_unlock(&devices_lock);
-
- lp->pdev.id = index;
- lp->pdev.name = DRIVER_NAME;
- platform_device_register(&lp->pdev);
- SET_NETDEV_DEV(dev,&lp->pdev.dev);
-
- /*
- * If this name ends up conflicting with an existing registered
- * netdevice, that is OK, register_netdev{,ice}() will notice this
- * and fail.
- */
- snprintf(dev->name, sizeof dev->name, "eth%d", index);
-
- dev->mtu = lp->mtu;
- dev->open = iss_net_open;
- dev->hard_start_xmit = iss_net_start_xmit;
- dev->stop = iss_net_close;
- dev->get_stats = iss_net_get_stats;
- dev->set_multicast_list = iss_net_set_multicast_list;
- dev->tx_timeout = iss_net_tx_timeout;
- dev->set_mac_address = iss_net_set_mac;
- dev->change_mtu = iss_net_change_mtu;
- dev->watchdog_timeo = (HZ >> 1);
- dev->irq = -1;
-
- rtnl_lock();
- err = register_netdevice(dev);
- rtnl_unlock();
-
- if (err) {
- printk("Error registering net device!\n");
- /* XXX: should we call ->remove() here? */
- free_netdev(dev);
- return 1;
- }
-
- init_timer(&lp->tl);
- lp->tl.function = iss_net_user_timer_expire;
-
-#if 0
- if (lp->have_mac)
- set_ether_mac(dev, lp->mac);
-#endif
- return 0;
-
-errout:
- // FIXME: unregister; free, etc..
- return -EIO;
-
-}
-
-/* ------------------------------------------------------------------------- */
-
-/* Filled in during early boot */
-
-struct list_head eth_cmd_line = LIST_HEAD_INIT(eth_cmd_line);
-
-struct iss_net_init {
- struct list_head list;
- char *init; /* init string */
- int index;
-};
-
-/*
- * Parse the command line and look for 'ethX=...' fields, and register all
- * those fields. They will be later initialized in iss_net_init.
- */
-
-#define ERR KERN_ERR "iss_net_setup: "
-
-static int iss_net_setup(char *str)
-{
- struct iss_net_private *device = NULL;
- struct iss_net_init *new;
- struct list_head *ele;
- char *end;
- int n;
-
- n = simple_strtoul(str, &end, 0);
- if (end == str) {
- printk(ERR "Failed to parse '%s'\n", str);
- return 1;
- }
- if (n < 0) {
- printk(ERR "Device %d is negative\n", n);
- return 1;
- }
- if (*(str = end) != '=') {
- printk(ERR "Expected '=' after device number\n");
- return 1;
- }
-
- spin_lock(&devices_lock);
-
- list_for_each(ele, &devices) {
- device = list_entry(ele, struct iss_net_private, device_list);
- if (device->index == n)
- break;
- }
-
- spin_unlock(&devices_lock);
-
- if (device && device->index == n) {
- printk(ERR "Device %d already configured\n", n);
- return 1;
- }
-
- if ((new = alloc_bootmem(sizeof new)) == NULL) {
- printk("Alloc_bootmem failed\n");
- return 1;
- }
-
- INIT_LIST_HEAD(&new->list);
- new->index = n;
- new->init = str + 1;
-
- list_add_tail(&new->list, &eth_cmd_line);
- return 1;
-}
-
-#undef ERR
-
-__setup("eth=", iss_net_setup);
-
-/*
- * Initialize all ISS Ethernet devices previously registered in iss_net_setup.
- */
-
-static int iss_net_init(void)
-{
- struct list_head *ele, *next;
-
- /* Walk through all Ethernet devices specified in the command line. */
-
- list_for_each_safe(ele, next, &eth_cmd_line) {
- struct iss_net_init *eth;
- eth = list_entry(ele, struct iss_net_init, list);
- iss_net_configure(eth->index, eth->init);
- }
-
- return 1;
-}
-
-module_init(iss_net_init);
-