diff options
Diffstat (limited to 'drivers/ieee1394/eth1394.c')
| -rw-r--r-- | drivers/ieee1394/eth1394.c | 1736 |
1 files changed, 0 insertions, 1736 deletions
diff --git a/drivers/ieee1394/eth1394.c b/drivers/ieee1394/eth1394.c deleted file mode 100644 index bc289e367e3..00000000000 --- a/drivers/ieee1394/eth1394.c +++ /dev/null @@ -1,1736 +0,0 @@ -/* - * eth1394.c -- IPv4 driver for Linux IEEE-1394 Subsystem - * - * Copyright (C) 2001-2003 Ben Collins <bcollins@debian.org> - * 2000 Bonin Franck <boninf@free.fr> - * 2003 Steve Kinneberg <kinnebergsteve@acmsystems.com> - * - * Mainly based on work by Emanuel Pirker and Andreas E. Bombe - * - * 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. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software Foundation, - * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - */ - -/* - * This driver intends to support RFC 2734, which describes a method for - * transporting IPv4 datagrams over IEEE-1394 serial busses. - * - * TODO: - * RFC 2734 related: - * - Add MCAP. Limited Multicast exists only to 224.0.0.1 and 224.0.0.2. - * - * Non-RFC 2734 related: - * - Handle fragmented skb's coming from the networking layer. - * - Move generic GASP reception to core 1394 code - * - Convert kmalloc/kfree for link fragments to use kmem_cache_* instead - * - Stability improvements - * - Performance enhancements - * - Consider garbage collecting old partial datagrams after X amount of time - */ - -#include <linux/module.h> - -#include <linux/kernel.h> -#include <linux/slab.h> -#include <linux/errno.h> -#include <linux/types.h> -#include <linux/delay.h> -#include <linux/init.h> -#include <linux/workqueue.h> - -#include <linux/netdevice.h> -#include <linux/inetdevice.h> -#include <linux/if_arp.h> -#include <linux/if_ether.h> -#include <linux/ip.h> -#include <linux/in.h> -#include <linux/tcp.h> -#include <linux/skbuff.h> -#include <linux/bitops.h> -#include <linux/ethtool.h> -#include <asm/uaccess.h> -#include <asm/delay.h> -#include <asm/unaligned.h> -#include <net/arp.h> - -#include "config_roms.h" -#include "csr1212.h" -#include "eth1394.h" -#include "highlevel.h" -#include "ieee1394.h" -#include "ieee1394_core.h" -#include "ieee1394_hotplug.h" -#include "ieee1394_transactions.h" -#include "ieee1394_types.h" -#include "iso.h" -#include "nodemgr.h" - -#define ETH1394_PRINT_G(level, fmt, args...) \ - printk(level "%s: " fmt, driver_name, ## args) - -#define ETH1394_PRINT(level, dev_name, fmt, args...) \ - printk(level "%s: %s: " fmt, driver_name, dev_name, ## args) - -struct fragment_info { - struct list_head list; - int offset; - int len; -}; - -struct partial_datagram { - struct list_head list; - u16 dgl; - u16 dg_size; - __be16 ether_type; - struct sk_buff *skb; - char *pbuf; - struct list_head frag_info; -}; - -struct pdg_list { - struct list_head list; /* partial datagram list per node */ - unsigned int sz; /* partial datagram list size per node */ - spinlock_t lock; /* partial datagram lock */ -}; - -struct eth1394_host_info { - struct hpsb_host *host; - struct net_device *dev; -}; - -struct eth1394_node_ref { - struct unit_directory *ud; - struct list_head list; -}; - -struct eth1394_node_info { - u16 maxpayload; /* max payload */ - u8 sspd; /* max speed */ - u64 fifo; /* FIFO address */ - struct pdg_list pdg; /* partial RX datagram lists */ - int dgl; /* outgoing datagram label */ -}; - -static const char driver_name[] = "eth1394"; - -static struct kmem_cache *packet_task_cache; - -static struct hpsb_highlevel eth1394_highlevel; - -/* Use common.lf to determine header len */ -static const int hdr_type_len[] = { - sizeof(struct eth1394_uf_hdr), - sizeof(struct eth1394_ff_hdr), - sizeof(struct eth1394_sf_hdr), - sizeof(struct eth1394_sf_hdr) -}; - -static const u16 eth1394_speedto_maxpayload[] = { -/* S100, S200, S400, S800, S1600, S3200 */ - 512, 1024, 2048, 4096, 4096, 4096 -}; - -MODULE_AUTHOR("Ben Collins (bcollins@debian.org)"); -MODULE_DESCRIPTION("IEEE 1394 IPv4 Driver (IPv4-over-1394 as per RFC 2734)"); -MODULE_LICENSE("GPL"); - -/* - * The max_partial_datagrams parameter is the maximum number of fragmented - * datagrams per node that eth1394 will keep in memory. Providing an upper - * bound allows us to limit the amount of memory that partial datagrams - * consume in the event that some partial datagrams are never completed. - */ -static int max_partial_datagrams = 25; -module_param(max_partial_datagrams, int, S_IRUGO | S_IWUSR); -MODULE_PARM_DESC(max_partial_datagrams, - "Maximum number of partially received fragmented datagrams " - "(default = 25)."); - - -static int ether1394_header(struct sk_buff *skb, struct net_device *dev, - unsigned short type, const void *daddr, - const void *saddr, unsigned len); -static int ether1394_rebuild_header(struct sk_buff *skb); -static int ether1394_header_parse(const struct sk_buff *skb, - unsigned char *haddr); -static int ether1394_header_cache(const struct neighbour *neigh, - struct hh_cache *hh); -static void ether1394_header_cache_update(struct hh_cache *hh, - const struct net_device *dev, - const unsigned char *haddr); -static netdev_tx_t ether1394_tx(struct sk_buff *skb, - struct net_device *dev); -static void ether1394_iso(struct hpsb_iso *iso); - -static const struct ethtool_ops ethtool_ops; - -static int ether1394_write(struct hpsb_host *host, int srcid, int destid, - quadlet_t *data, u64 addr, size_t len, u16 flags); -static void ether1394_add_host(struct hpsb_host *host); -static void ether1394_remove_host(struct hpsb_host *host); -static void ether1394_host_reset(struct hpsb_host *host); - -/* Function for incoming 1394 packets */ -static const struct hpsb_address_ops addr_ops = { - .write = ether1394_write, -}; - -/* Ieee1394 highlevel driver functions */ -static struct hpsb_highlevel eth1394_highlevel = { - .name = driver_name, - .add_host = ether1394_add_host, - .remove_host = ether1394_remove_host, - .host_reset = ether1394_host_reset, -}; - -static int ether1394_recv_init(struct eth1394_priv *priv) -{ - unsigned int iso_buf_size; - - /* FIXME: rawiso limits us to PAGE_SIZE */ - iso_buf_size = min((unsigned int)PAGE_SIZE, - 2 * (1U << (priv->host->csr.max_rec + 1))); - - priv->iso = hpsb_iso_recv_init(priv->host, - ETHER1394_GASP_BUFFERS * iso_buf_size, - ETHER1394_GASP_BUFFERS, - priv->broadcast_channel, - HPSB_ISO_DMA_PACKET_PER_BUFFER, - 1, ether1394_iso); - if (priv->iso == NULL) { - ETH1394_PRINT_G(KERN_ERR, "Failed to allocate IR context\n"); - priv->bc_state = ETHER1394_BC_ERROR; - return -EAGAIN; - } - - if (hpsb_iso_recv_start(priv->iso, -1, (1 << 3), -1) < 0) - priv->bc_state = ETHER1394_BC_STOPPED; - else - priv->bc_state = ETHER1394_BC_RUNNING; - return 0; -} - -/* This is called after an "ifup" */ -static int ether1394_open(struct net_device *dev) -{ - struct eth1394_priv *priv = netdev_priv(dev); - int ret; - - if (priv->bc_state == ETHER1394_BC_ERROR) { - ret = ether1394_recv_init(priv); - if (ret) - return ret; - } - netif_start_queue(dev); - return 0; -} - -/* This is called after an "ifdown" */ -static int ether1394_stop(struct net_device *dev) -{ - /* flush priv->wake */ - flush_scheduled_work(); - - netif_stop_queue(dev); - return 0; -} - -/* FIXME: What to do if we timeout? I think a host reset is probably in order, - * so that's what we do. Should we increment the stat counters too? */ -static void ether1394_tx_timeout(struct net_device *dev) -{ - struct hpsb_host *host = - ((struct eth1394_priv *)netdev_priv(dev))->host; - - ETH1394_PRINT(KERN_ERR, dev->name, "Timeout, resetting host\n"); - ether1394_host_reset(host); -} - -static inline int ether1394_max_mtu(struct hpsb_host* host) -{ - return (1 << (host->csr.max_rec + 1)) - - sizeof(union eth1394_hdr) - ETHER1394_GASP_OVERHEAD; -} - -static int ether1394_change_mtu(struct net_device *dev, int new_mtu) -{ - int max_mtu; - - if (new_mtu < 68) - return -EINVAL; - - max_mtu = ether1394_max_mtu( - ((struct eth1394_priv *)netdev_priv(dev))->host); - if (new_mtu > max_mtu) { - ETH1394_PRINT(KERN_INFO, dev->name, - "Local node constrains MTU to %d\n", max_mtu); - return -ERANGE; - } - - dev->mtu = new_mtu; - return 0; -} - -static void purge_partial_datagram(struct list_head *old) -{ - struct partial_datagram *pd; - struct list_head *lh, *n; - struct fragment_info *fi; - - pd = list_entry(old, struct partial_datagram, list); - - list_for_each_safe(lh, n, &pd->frag_info) { - fi = list_entry(lh, struct fragment_info, list); - list_del(lh); - kfree(fi); - } - list_del(old); - kfree_skb(pd->skb); - kfree(pd); -} - -/****************************************** - * 1394 bus activity functions - ******************************************/ - -static struct eth1394_node_ref *eth1394_find_node(struct list_head *inl, - struct unit_directory *ud) -{ - struct eth1394_node_ref *node; - - list_for_each_entry(node, inl, list) - if (node->ud == ud) - return node; - - return NULL; -} - -static struct eth1394_node_ref *eth1394_find_node_guid(struct list_head *inl, - u64 guid) -{ - struct eth1394_node_ref *node; - - list_for_each_entry(node, inl, list) - if (node->ud->ne->guid == guid) - return node; - - return NULL; -} - -static struct eth1394_node_ref *eth1394_find_node_nodeid(struct list_head *inl, - nodeid_t nodeid) -{ - struct eth1394_node_ref *node; - - list_for_each_entry(node, inl, list) - if (node->ud->ne->nodeid == nodeid) - return node; - - return NULL; -} - -static int eth1394_new_node(struct eth1394_host_info *hi, - struct unit_directory *ud) -{ - struct eth1394_priv *priv; - struct eth1394_node_ref *new_node; - struct eth1394_node_info *node_info; - - new_node = kmalloc(sizeof(*new_node), GFP_KERNEL); - if (!new_node) - return -ENOMEM; - - node_info = kmalloc(sizeof(*node_info), GFP_KERNEL); - if (!node_info) { - kfree(new_node); - return -ENOMEM; - } - - spin_lock_init(&node_info->pdg.lock); - INIT_LIST_HEAD(&node_info->pdg.list); - node_info->pdg.sz = 0; - node_info->fifo = CSR1212_INVALID_ADDR_SPACE; - - dev_set_drvdata(&ud->device, node_info); - new_node->ud = ud; - - priv = netdev_priv(hi->dev); - list_add_tail(&new_node->list, &priv->ip_node_list); - return 0; -} - -static int eth1394_probe(struct device *dev) -{ - struct unit_directory *ud; - struct eth1394_host_info *hi; - - ud = container_of(dev, struct unit_directory, device); - hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host); - if (!hi) - return -ENOENT; - - return eth1394_new_node(hi, ud); -} - -static int eth1394_remove(struct device *dev) -{ - struct unit_directory *ud; - struct eth1394_host_info *hi; - struct eth1394_priv *priv; - struct eth1394_node_ref *old_node; - struct eth1394_node_info *node_info; - struct list_head *lh, *n; - unsigned long flags; - - ud = container_of(dev, struct unit_directory, device); - hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host); - if (!hi) - return -ENOENT; - - priv = netdev_priv(hi->dev); - - old_node = eth1394_find_node(&priv->ip_node_list, ud); - if (!old_node) - return 0; - - list_del(&old_node->list); - kfree(old_node); - - node_info = dev_get_drvdata(&ud->device); - - spin_lock_irqsave(&node_info->pdg.lock, flags); - /* The partial datagram list should be empty, but we'll just - * make sure anyway... */ - list_for_each_safe(lh, n, &node_info->pdg.list) - purge_partial_datagram(lh); - spin_unlock_irqrestore(&node_info->pdg.lock, flags); - - kfree(node_info); - dev_set_drvdata(&ud->device, NULL); - return 0; -} - -static int eth1394_update(struct unit_directory *ud) -{ - struct eth1394_host_info *hi; - struct eth1394_priv *priv; - struct eth1394_node_ref *node; - - hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host); - if (!hi) - return -ENOENT; - - priv = netdev_priv(hi->dev); - node = eth1394_find_node(&priv->ip_node_list, ud); - if (node) - return 0; - - return eth1394_new_node(hi, ud); -} - -static const struct ieee1394_device_id eth1394_id_table[] = { - { - .match_flags = (IEEE1394_MATCH_SPECIFIER_ID | - IEEE1394_MATCH_VERSION), - .specifier_id = ETHER1394_GASP_SPECIFIER_ID, - .version = ETHER1394_GASP_VERSION, - }, - {} -}; - -MODULE_DEVICE_TABLE(ieee1394, eth1394_id_table); - -static struct hpsb_protocol_driver eth1394_proto_driver = { - .name = driver_name, - .id_table = eth1394_id_table, - .update = eth1394_update, - .driver = { - .probe = eth1394_probe, - .remove = eth1394_remove, - }, -}; - -static void ether1394_reset_priv(struct net_device *dev, int set_mtu) -{ - unsigned long flags; - int i; - struct eth1394_priv *priv = netdev_priv(dev); - struct hpsb_host *host = priv->host; - u64 guid = get_unaligned((u64 *)&(host->csr.rom->bus_info_data[3])); - int max_speed = IEEE1394_SPEED_MAX; - - spin_lock_irqsave(&priv->lock, flags); - - memset(priv->ud_list, 0, sizeof(priv->ud_list)); - priv->bc_maxpayload = 512; - - /* Determine speed limit */ - /* FIXME: This is broken for nodes with link speed < PHY speed, - * and it is suboptimal for S200B...S800B hardware. - * The result of nodemgr's speed probe should be used somehow. */ - for (i = 0; i < host->node_count; i++) { - /* take care of S100B...S400B PHY ports */ - if (host->speed[i] == SELFID_SPEED_UNKNOWN) { - max_speed = IEEE1394_SPEED_100; - break; - } - if (max_speed > host->speed[i]) - max_speed = host->speed[i]; - } - priv->bc_sspd = max_speed; - - if (set_mtu) { - /* Use the RFC 2734 default 1500 octets or the maximum payload - * as initial MTU */ - dev->mtu = min(1500, ether1394_max_mtu(host)); - - /* Set our hardware address while we're at it */ - memcpy(dev->dev_addr, &guid, sizeof(u64)); - memset(dev->broadcast, 0xff, sizeof(u64)); - } - - spin_unlock_irqrestore(&priv->lock, flags); -} - -static const struct header_ops ether1394_header_ops = { - .create = ether1394_header, - .rebuild = ether1394_rebuild_header, - .cache = ether1394_header_cache, - .cache_update = ether1394_header_cache_update, - .parse = ether1394_header_parse, -}; - -static const struct net_device_ops ether1394_netdev_ops = { - .ndo_open = ether1394_open, - .ndo_stop = ether1394_stop, - .ndo_start_xmit = ether1394_tx, - .ndo_tx_timeout = ether1394_tx_timeout, - .ndo_change_mtu = ether1394_change_mtu, -}; - -static void ether1394_init_dev(struct net_device *dev) -{ - - dev->header_ops = ðer1394_header_ops; - dev->netdev_ops = ðer1394_netdev_ops; - - SET_ETHTOOL_OPS(dev, ðtool_ops); - - dev->watchdog_timeo = ETHER1394_TIMEOUT; - dev->flags = IFF_BROADCAST | IFF_MULTICAST; - dev->features = NETIF_F_HIGHDMA; - dev->addr_len = ETH1394_ALEN; - dev->hard_header_len = ETH1394_HLEN; - dev->type = ARPHRD_IEEE1394; - - /* FIXME: This value was copied from ether_setup(). Is it too much? */ - dev->tx_queue_len = 1000; -} - -/* - * Wake the queue up after commonly encountered transmit failure conditions are - * hopefully over. Currently only tlabel exhaustion is accounted for. - */ -static void ether1394_wake_queue(struct work_struct *work) -{ - struct eth1394_priv *priv; - struct hpsb_packet *packet; - - priv = container_of(work, struct eth1394_priv, wake); - packet = hpsb_alloc_packet(0); - - /* This is really bad, but unjam the queue anyway. */ - if (!packet) - goto out; - - packet->host = priv->host; - packet->node_id = priv->wake_node; - /* - * A transaction label is all we really want. If we get one, it almost - * always means we can get a lot more because the ieee1394 core recycled - * a whole batch of tlabels, at last. - */ - if (hpsb_get_tlabel(packet) == 0) - hpsb_free_tlabel(packet); - - hpsb_free_packet(packet); -out: - netif_wake_queue(priv->wake_dev); -} - -/* - * This function is called every time a card is found. It is generally called - * when the module is installed. This is where we add all of our ethernet - * devices. One for each host. - */ -static void ether1394_add_host(struct hpsb_host *host) -{ - struct eth1394_host_info *hi = NULL; - struct net_device *dev = NULL; - struct eth1394_priv *priv; - u64 fifo_addr; - - if (hpsb_config_rom_ip1394_add(host) != 0) { - ETH1394_PRINT_G(KERN_ERR, "Can't add IP-over-1394 ROM entry\n"); - return; - } - - fifo_addr = hpsb_allocate_and_register_addrspace( - ð1394_highlevel, host, &addr_ops, - ETHER1394_REGION_ADDR_LEN, ETHER1394_REGION_ADDR_LEN, - CSR1212_INVALID_ADDR_SPACE, CSR1212_INVALID_ADDR_SPACE); - if (fifo_addr == CSR1212_INVALID_ADDR_SPACE) { - ETH1394_PRINT_G(KERN_ERR, "Cannot register CSR space\n"); - hpsb_config_rom_ip1394_remove(host); - return; - } - - dev = alloc_netdev(sizeof(*priv), "eth%d", ether1394_init_dev); - if (dev == NULL) { - ETH1394_PRINT_G(KERN_ERR, "Out of memory\n"); - goto out; - } - - SET_NETDEV_DEV(dev, &host->device); - - priv = netdev_priv(dev); - INIT_LIST_HEAD(&priv->ip_node_list); - spin_lock_init(&priv->lock); - priv->host = host; - priv->local_fifo = fifo_addr; - INIT_WORK(&priv->wake, ether1394_wake_queue); - priv->wake_dev = dev; - - hi = hpsb_create_hostinfo(ð1394_highlevel, host, sizeof(*hi)); - if (hi == NULL) { - ETH1394_PRINT_G(KERN_ERR, "Out of memory\n"); - goto out; - } - - ether1394_reset_priv(dev, 1); - - if (register_netdev(dev)) { - ETH1394_PRINT_G(KERN_ERR, "Cannot register the driver\n"); - goto out; - } - - ETH1394_PRINT(KERN_INFO, dev->name, "IPv4 over IEEE 1394 (fw-host%d)\n", - host->id); - - hi->host = host; - hi->dev = dev; - - /* Ignore validity in hopes that it will be set in the future. It'll - * be checked when the eth device is opened. */ - priv->broadcast_channel = host->csr.broadcast_channel & 0x3f; - - ether1394_recv_init(priv); - return; -out: - if (dev) - free_netdev(dev); - if (hi) - hpsb_destroy_hostinfo(ð1394_highlevel, host); - hpsb_unregister_addrspace(ð1394_highlevel, host, fifo_addr); - hpsb_config_rom_ip1394_remove(host); -} - -/* Remove a card from our list */ -static void ether1394_remove_host(struct hpsb_host *host) -{ - struct eth1394_host_info *hi; - struct eth1394_priv *priv; - - hi = hpsb_get_hostinfo(ð1394_highlevel, host); - if (!hi) - return; - priv = netdev_priv(hi->dev); - hpsb_unregister_addrspace(ð1394_highlevel, host, priv->local_fifo); - hpsb_config_rom_ip1394_remove(host); - if (priv->iso) - hpsb_iso_shutdown(priv->iso); - unregister_netdev(hi->dev); - free_netdev(hi->dev); -} - -/* A bus reset happened */ -static void ether1394_host_reset(struct hpsb_host *host) -{ - struct eth1394_host_info *hi; - struct eth1394_priv *priv; - struct net_device *dev; - struct list_head *lh, *n; - struct eth1394_node_ref *node; - struct eth1394_node_info *node_info; - unsigned long flags; - - hi = hpsb_get_hostinfo(ð1394_highlevel, host); - - /* This can happen for hosts that we don't use */ - if (!hi) - return; - - dev = hi->dev; - priv = netdev_priv(dev); - - /* Reset our private host data, but not our MTU */ - netif_stop_queue(dev); - ether1394_reset_priv(dev, 0); - - list_for_each_entry(node, &priv->ip_node_list, list) { - node_info = dev_get_drvdata(&node->ud->device); - - spin_lock_irqsave(&node_info->pdg.lock, flags); - - list_for_each_safe(lh, n, &node_info->pdg.list) - purge_partial_datagram(lh); - - INIT_LIST_HEAD(&(node_info->pdg.list)); - node_info->pdg.sz = 0; - - spin_unlock_irqrestore(&node_info->pdg.lock, flags); - } - - netif_wake_queue(dev); -} - -/****************************************** - * HW Header net device functions - ******************************************/ -/* These functions have been adapted from net/ethernet/eth.c */ - -/* Create a fake MAC header for an arbitrary protocol layer. - * saddr=NULL means use device source address - * daddr=NULL means leave destination address (eg unresolved arp). */ -static int ether1394_header(struct sk_buff *skb, struct net_device *dev, - unsigned short type, const void *daddr, - const void *saddr, unsigned len) -{ - struct eth1394hdr *eth = - (struct eth1394hdr *)skb_push(skb, ETH1394_HLEN); - - eth->h_proto = htons(type); - - if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) { - memset(eth->h_dest, 0, dev->addr_len); - return dev->hard_header_len; - } - - if (daddr) { - memcpy(eth->h_dest, daddr, dev->addr_len); - return dev->hard_header_len; - } - - return -dev->hard_header_len; -} - -/* Rebuild the faked MAC header. This is called after an ARP - * (or in future other address resolution) has completed on this - * sk_buff. We now let ARP fill in the other fields. - * - * This routine CANNOT use cached dst->neigh! - * Really, it is used only when dst->neigh is wrong. - */ -static int ether1394_rebuild_header(struct sk_buff *skb) -{ - struct eth1394hdr *eth = (struct eth1394hdr *)skb->data; - - if (eth->h_proto == htons(ETH_P_IP)) - return arp_find((unsigned char *)ð->h_dest, skb); - - ETH1394_PRINT(KERN_DEBUG, skb->dev->name, - "unable to resolve type %04x addresses\n", - ntohs(eth->h_proto)); - return 0; -} - -static int ether1394_header_parse(const struct sk_buff *skb, - unsigned char *haddr) -{ - memcpy(haddr, skb->dev->dev_addr, ETH1394_ALEN); - return ETH1394_ALEN; -} - -static int ether1394_header_cache(const struct neighbour *neigh, - struct hh_cache *hh) -{ - __be16 type = hh->hh_type; - struct net_device *dev = neigh->dev; - struct eth1394hdr *eth = - (struct eth1394hdr *)((u8 *)hh->hh_data + 16 - ETH1394_HLEN); - - if (type == htons(ETH_P_802_3)) - return -1; - - eth->h_proto = type; - memcpy(eth->h_dest, neigh->ha, dev->addr_len); - - hh->hh_len = ETH1394_HLEN; - return 0; -} - -/* Called by Address Resolution module to notify changes in address. */ -static void ether1394_header_cache_update(struct hh_cache *hh, - const struct net_device *dev, - const unsigned char * haddr) -{ - memcpy((u8 *)hh->hh_data + 16 - ETH1394_HLEN, haddr, dev->addr_len); -} - -/****************************************** - * Datagram reception code - ******************************************/ - -/* Copied from net/ethernet/eth.c */ -static __be16 ether1394_type_trans(struct sk_buff *skb, struct net_device *dev) -{ - struct eth1394hdr *eth; - unsigned char *rawp; - - skb_reset_mac_header(skb); - skb_pull(skb, ETH1394_HLEN); - eth = eth1394_hdr(skb); - - if (*eth->h_dest & 1) { - if (memcmp(eth->h_dest, dev->broadcast, dev->addr_len) == 0) - skb->pkt_type = PACKET_BROADCAST; -#if 0 - else - skb->pkt_type = PACKET_MULTICAST; -#endif - } else { - if (memcmp(eth->h_dest, dev->dev_addr, dev->addr_len)) - skb->pkt_type = PACKET_OTHERHOST; - } - - if (ntohs(eth->h_proto) >= 1536) - return eth->h_proto; - - rawp = skb->data; - - if (*(unsigned short *)rawp == 0xFFFF) - return htons(ETH_P_802_3); - - return htons(ETH_P_802_2); -} - -/* Parse an encapsulated IP1394 header into an ethernet frame packet. - * We also perform ARP translation here, if need be. */ -static __be16 ether1394_parse_encap(struct sk_buff *skb, struct net_device *dev, - nodeid_t srcid, nodeid_t destid, - __be16 ether_type) -{ - struct eth1394_priv *priv = netdev_priv(dev); - __be64 dest_hw; - __be16 ret = 0; - - /* Setup our hw addresses. We use these to build the ethernet header. */ - if (destid == (LOCAL_BUS | ALL_NODES)) - dest_hw = ~cpu_to_be64(0); /* broadcast */ - else - dest_hw = cpu_to_be64((u64)priv->host->csr.guid_hi << 32 | - priv->host->csr.guid_lo); - - /* If this is an ARP packet, convert it. First, we want to make - * use of some of the fields, since they tell us a little bit - * about the sending machine. */ - if (ether_type == htons(ETH_P_ARP)) { - struct eth1394_arp *arp1394 = (struct eth1394_arp *)skb->data; - struct arphdr *arp = (struct arphdr *)skb->data; - unsigned char *arp_ptr = (unsigned char *)(arp + 1); - u64 fifo_addr = (u64)ntohs(arp1394->fifo_hi) << 32 | - ntohl(arp1394->fifo_lo); - u8 max_rec = min(priv->host->csr.max_rec, - (u8)(arp1394->max_rec)); - int sspd = arp1394->sspd; - u16 maxpayload; - struct eth1394_node_ref *node; - struct eth1394_node_info *node_info; - __be64 guid; - - /* Sanity check. MacOSX seems to be sending us 131 in this - * field (atleast on my Panther G5). Not sure why. */ - if (sspd > 5 || sspd < 0) - sspd = 0; - - maxpayload = min(eth1394_speedto_maxpayload[sspd], - (u16)(1 << (max_rec + 1))); - - guid = get_unaligned(&arp1394->s_uniq_id); - node = eth1394_find_node_guid(&priv->ip_node_list, - be64_to_cpu(guid)); - if (!node) - return cpu_to_be16(0); - - node_info = dev_get_drvdata(&node->ud->device); - - /* Update our speed/payload/fifo_offset table */ - node_info->maxpayload = maxpayload; - node_info->sspd = sspd; - node_info->fifo = fifo_addr; - - /* Now that we're done with the 1394 specific stuff, we'll - * need to alter some of the data. Believe it or not, all - * that needs to be done is sender_IP_address needs to be - * moved, the destination hardware address get stuffed - * in and the hardware address length set to 8. - * - * IMPORTANT: The code below overwrites 1394 specific data - * needed above so keep the munging of the data for the - * higher level IP stack last. */ - - arp->ar_hln = 8; - arp_ptr += arp->ar_hln; /* skip over sender unique id */ - *(u32 *)arp_ptr = arp1394->sip; /* move sender IP addr */ - arp_ptr += arp->ar_pln; /* skip over sender IP addr */ - - if (arp->ar_op == htons(ARPOP_REQUEST)) - memset(arp_ptr, 0, sizeof(u64)); - else - memcpy(arp_ptr, dev->dev_addr, sizeof(u64)); - } - - /* Now add the ethernet header. */ - if (dev_hard_header(skb, dev, ntohs(ether_type), &dest_hw, NULL, - skb->len) >= 0) - ret = ether1394_type_trans(skb, dev); - - return ret; -} - -static int fragment_overlap(struct list_head *frag_list, int offset, int len) -{ - struct fragment_info *fi; - int end = offset + len; - - list_for_each_entry(fi, frag_list, list) - if (offset < fi->offset + fi->len && end > fi->offset) - return 1; - - return 0; -} - -static struct list_head *find_partial_datagram(struct list_head *pdgl, int dgl) -{ - struct partial_datagram *pd; - - list_for_each_entry(pd, pdgl, list) - if (pd->dgl == dgl) - return &pd->list; - - return NULL; -} - -/* Assumes that new fragment does not overlap any existing fragments */ -static int new_fragment(struct list_head *frag_info, int offset, int len) -{ - struct list_head *lh; - struct fragment_info *fi, *fi2, *new; - - list_for_each(lh, frag_info) { - fi = list_entry(lh, struct fragment_info, list); - if (fi->offset + fi->len == offset) { - /* The new fragment can be tacked on to the end */ - fi->len += len; - /* Did the new fragment plug a hole? */ - fi2 = list_entry(lh->next, struct fragment_info, list); - if (fi->offset + fi->len == fi2->offset) { - /* glue fragments together */ - fi->len += fi2->len; - list_del(lh->next); - kfree(fi2); - } - return 0; - } else if (offset + len == fi->offset) { - /* The new fragment can be tacked on to the beginning */ - fi->offset = offset; - fi->len += len; - /* Did the new fragment plug a hole? */ - fi2 = list_entry(lh->prev, struct fragment_info, list); - if (fi2->offset + fi2->len == fi->offset) { - /* glue fragments together */ - fi2->len += fi->len; - list_del(lh); - kfree(fi); - } - return 0; - } else if (offset > fi->offset + fi->len) { - break; - } else if (offset + len < fi->offset) { - lh = lh->prev; - break; - } - } - - new = kmalloc(sizeof(*new), GFP_ATOMIC); - if (!new) - return -ENOMEM; - - new->offset = offset; - new->len = len; - - list_add(&new->list, lh); - return 0; -} - -static int new_partial_datagram(struct net_device *dev, struct list_head *pdgl, - int dgl, int dg_size, char *frag_buf, - int frag_off, int frag_len) -{ - struct partial_datagram *new; - - new = kmalloc(sizeof(*new), GFP_ATOMIC); - if (!new) - return -ENOMEM; - - INIT_LIST_HEAD(&new->frag_info); - - if (new_fragment(&new->frag_info, frag_off, frag_len) < 0) { - kfree(new); - return -ENOMEM; - } - - new->dgl = dgl; - new->dg_size = dg_size; - - new->skb = dev_alloc_skb(dg_size + dev->hard_header_len + 15); - if (!new->skb) { - struct fragment_info *fi = list_entry(new->frag_info.next, - struct fragment_info, - list); - kfree(fi); - kfree(new); - return -ENOMEM; - } - - skb_reserve(new->skb, (dev->hard_header_len + 15) & ~15); - new->pbuf = skb_put(new->skb, dg_size); - memcpy(new->pbuf + frag_off, frag_buf, frag_len); - - list_add(&new->list, pdgl); - return 0; -} - -static int update_partial_datagram(struct list_head *pdgl, struct list_head *lh, - char *frag_buf, int frag_off, int frag_len) -{ - struct partial_datagram *pd = - list_entry(lh, struct partial_datagram, list); - - if (new_fragment(&pd->frag_info, frag_off, frag_len) < 0) - return -ENOMEM; - - memcpy(pd->pbuf + frag_off, frag_buf, frag_len); - - /* Move list entry to beginnig of list so that oldest partial - * datagrams percolate to the end of the list */ - list_move(lh, pdgl); - return 0; -} - -static int is_datagram_complete(struct list_head *lh, int dg_size) -{ - struct partial_datagram *pd; - struct fragment_info *fi; - - pd = list_entry(lh, struct partial_datagram, list); - fi = list_entry(pd->frag_info.next, struct fragment_info, list); - - return (fi->len == dg_size); -} - -/* Packet reception. We convert the IP1394 encapsulation header to an - * ethernet header, and fill it with some of our other fields. This is - * an incoming packet from the 1394 bus. */ -static int ether1394_data_handler(struct net_device *dev, int srcid, int destid, - char *buf, int len) -{ - struct sk_buff *skb; - unsigned long flags; - struct eth1394_priv *priv = netdev_priv(dev); - union eth1394_hdr *hdr = (union eth1394_hdr *)buf; - __be16 ether_type = cpu_to_be16(0); /* initialized to clear warning */ - int hdr_len; - struct unit_directory *ud = priv->ud_list[NODEID_TO_NODE(srcid)]; - struct eth1394_node_info *node_info; - - if (!ud) { - struct eth1394_node_ref *node; - node = eth1394_find_node_nodeid(&priv->ip_node_list, srcid); - if (unlikely(!node)) { - HPSB_PRINT(KERN_ERR, "ether1394 rx: sender nodeid " - "lookup failure: " NODE_BUS_FMT, - NODE_BUS_ARGS(priv->host, srcid)); - dev->stats.rx_dropped++; - return -1; - } - ud = node->ud; - - priv->ud_list[NODEID_TO_NODE(srcid)] = ud; - } - - node_info = dev_get_drvdata(&ud->device); - - /* First, did we receive a fragmented or unfragmented datagram? */ - hdr->words.word1 = ntohs(hdr->words.word1); - - hdr_len = hdr_type_len[hdr->common.lf]; - - if (hdr->common.lf == ETH1394_HDR_LF_UF) { - /* An unfragmented datagram has been received by the ieee1394 - * bus. Build an skbuff around it so we can pass it to the - * high level network layer. */ - - skb = dev_alloc_skb(len + dev->hard_header_len + 15); - if (unlikely(!skb)) { - ETH1394_PRINT_G(KERN_ERR, "Out of memory\n"); - dev->stats.rx_dropped++; - return -1; - } - skb_reserve(skb, (dev->hard_header_len + 15) & ~15); - memcpy(skb_put(skb, len - hdr_len), buf + hdr_len, - len - hdr_len); - ether_type = hdr->uf.ether_type; - } else { - /* A datagram fragment has been received, now the fun begins. */ - - struct list_head *pdgl, *lh; - struct partial_datagram *pd; - int fg_off; - int fg_len = len - hdr_len; - int dg_size; - int dgl; - int retval; - struct pdg_list *pdg = &(node_info->pdg); - - hdr->words.word3 = ntohs(hdr->words.word3); - /* The 4th header word is reserved so no need to do ntohs() */ - - if (hdr->common.lf == ETH1394_HDR_LF_FF) { - ether_type = hdr->ff.ether_type; - dgl = hdr->ff.dgl; - dg_size = hdr->ff.dg_size + 1; - fg_off = 0; - } else { - hdr->words.word2 = ntohs(hdr->words.word2); - dgl = hdr->sf.dgl; - dg_size = hdr->sf.dg_size + 1; - fg_off = hdr->sf.fg_off; - } - spin_lock_irqsave(&pdg->lock, flags); - - pdgl = &(pdg->list); - lh = find_partial_datagram(pdgl, dgl); - - if (lh == NULL) { - while (pdg->sz >= max_partial_datagrams) { - /* remove the oldest */ - purge_partial_datagram(pdgl->prev); - pdg->sz--; - } - - retval = new_partial_datagram(dev, pdgl, dgl, dg_size, - buf + hdr_len, fg_off, - fg_len); - if (retval < 0) { - spin_unlock_irqrestore(&pdg->lock, flags); - goto bad_proto; - } - pdg->sz++; - lh = find_partial_datagram(pdgl, dgl); - } else { - pd = list_entry(lh, struct partial_datagram, list); - - if (fragment_overlap(&pd->frag_info, fg_off, fg_len)) { - /* Overlapping fragments, obliterate old - * datagram and start new one. */ - purge_partial_datagram(lh); - retval = new_partial_datagram(dev, pdgl, dgl, - dg_size, - buf + hdr_len, - fg_off, fg_len); - if (retval < 0) { - pdg->sz--; |