diff options
Diffstat (limited to 'drivers/ieee1394/eth1394.c')
| -rw-r--r-- | drivers/ieee1394/eth1394.c | 1799 |
1 files changed, 0 insertions, 1799 deletions
diff --git a/drivers/ieee1394/eth1394.c b/drivers/ieee1394/eth1394.c deleted file mode 100644 index c9e92d85c89..00000000000 --- a/drivers/ieee1394/eth1394.c +++ /dev/null @@ -1,1799 +0,0 @@ -/* - * eth1394.c -- Ethernet 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. This driver - * will ultimately support that method, but currently falls short in - * several areas. - * - * 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/sched.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/netdevice.h> -#include <linux/inetdevice.h> -#include <linux/etherdevice.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/semaphore.h> -#include <net/arp.h> - -#include "csr1212.h" -#include "ieee1394_types.h" -#include "ieee1394_core.h" -#include "ieee1394_transactions.h" -#include "ieee1394.h" -#include "highlevel.h" -#include "iso.h" -#include "nodemgr.h" -#include "eth1394.h" -#include "config_roms.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) - -#define DEBUG(fmt, args...) \ - printk(KERN_ERR "%s:%s[%d]: " fmt "\n", driver_name, __FUNCTION__, __LINE__, ## args) -#define TRACE() printk(KERN_ERR "%s:%s[%d] ---- TRACE\n", driver_name, __FUNCTION__, __LINE__) - -static char version[] __devinitdata = - "$Rev: 1312 $ Ben Collins <bcollins@debian.org>"; - -struct fragment_info { - struct list_head list; - int offset; - int len; -}; - -struct partial_datagram { - struct list_head list; - u16 dgl; - u16 dg_size; - u16 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 */ -}; - -/* Our ieee1394 highlevel driver */ -#define ETH1394_DRIVER_NAME "eth1394" -static const char driver_name[] = ETH1394_DRIVER_NAME; - -static kmem_cache_t *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) -}; - -/* Change this to IEEE1394_SPEED_S100 to make testing easier */ -#define ETH1394_SPEED_DEF IEEE1394_SPEED_MAX - -/* For now, this needs to be 1500, so that XP works with us */ -#define ETH1394_DATA_LEN ETH_DATA_LEN - -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, void *daddr, void *saddr, - unsigned len); -static int ether1394_rebuild_header(struct sk_buff *skb); -static int ether1394_header_parse(struct sk_buff *skb, unsigned char *haddr); -static int ether1394_header_cache(struct neighbour *neigh, struct hh_cache *hh); -static void ether1394_header_cache_update(struct hh_cache *hh, - struct net_device *dev, - unsigned char * haddr); -static int ether1394_mac_addr(struct net_device *dev, void *p); - -static void purge_partial_datagram(struct list_head *old); -static int ether1394_tx(struct sk_buff *skb, struct net_device *dev); -static void ether1394_iso(struct hpsb_iso *iso); - -static 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 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, -}; - - -/* This is called after an "ifup" */ -static int ether1394_open (struct net_device *dev) -{ - struct eth1394_priv *priv = netdev_priv(dev); - int ret = 0; - - /* Something bad happened, don't even try */ - if (priv->bc_state == ETHER1394_BC_ERROR) { - /* we'll try again */ - priv->iso = hpsb_iso_recv_init(priv->host, - ETHER1394_ISO_BUF_SIZE, - ETHER1394_GASP_BUFFERS, - priv->broadcast_channel, - HPSB_ISO_DMA_PACKET_PER_BUFFER, - 1, ether1394_iso); - if (priv->iso == NULL) { - ETH1394_PRINT(KERN_ERR, dev->name, - "Could not allocate isochronous receive " - "context for the broadcast channel\n"); - priv->bc_state = ETHER1394_BC_ERROR; - ret = -EAGAIN; - } else { - 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; - } - } - - if (ret) - return ret; - - netif_start_queue (dev); - return 0; -} - -/* This is called after an "ifdown" */ -static int ether1394_stop (struct net_device *dev) -{ - netif_stop_queue (dev); - return 0; -} - -/* Return statistics to the caller */ -static struct net_device_stats *ether1394_stats (struct net_device *dev) -{ - return &(((struct eth1394_priv *)netdev_priv(dev))->stats); -} - -/* 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) -{ - ETH1394_PRINT (KERN_ERR, dev->name, "Timeout, resetting host %s\n", - ((struct eth1394_priv *)netdev_priv(dev))->host->driver->name); - - highlevel_host_reset (((struct eth1394_priv *)netdev_priv(dev))->host); - - netif_wake_queue (dev); -} - -static int ether1394_change_mtu(struct net_device *dev, int new_mtu) -{ - struct eth1394_priv *priv = netdev_priv(dev); - - if ((new_mtu < 68) || - (new_mtu > min(ETH1394_DATA_LEN, - (int)((1 << (priv->host->csr.max_rec + 1)) - - (sizeof(union eth1394_hdr) + - ETHER1394_GASP_OVERHEAD))))) - return -EINVAL; - dev->mtu = new_mtu; - return 0; -} - -static void purge_partial_datagram(struct list_head *old) -{ - struct partial_datagram *pd = list_entry(old, struct partial_datagram, list); - struct list_head *lh, *n; - - list_for_each_safe(lh, n, &pd->frag_info) { - struct fragment_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_probe(struct device *dev) -{ - struct unit_directory *ud; - struct eth1394_host_info *hi; - struct eth1394_priv *priv; - struct eth1394_node_ref *new_node; - struct eth1394_node_info *node_info; - - ud = container_of(dev, struct unit_directory, device); - - hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host); - if (!hi) - return -ENOENT; - - new_node = kmalloc(sizeof(struct eth1394_node_ref), - in_interrupt() ? GFP_ATOMIC : GFP_KERNEL); - if (!new_node) - return -ENOMEM; - - node_info = kmalloc(sizeof(struct eth1394_node_info), - in_interrupt() ? GFP_ATOMIC : 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 = ETHER1394_INVALID_ADDR; - - ud->device.driver_data = 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_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) { - list_del(&old_node->list); - kfree(old_node); - - node_info = (struct eth1394_node_info*)ud->device.driver_data; - - 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); - ud->device.driver_data = 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; - struct eth1394_node_info *node_info; - - 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) { - node = kmalloc(sizeof(struct eth1394_node_ref), - in_interrupt() ? GFP_ATOMIC : GFP_KERNEL); - if (!node) - return -ENOMEM; - - node_info = kmalloc(sizeof(struct eth1394_node_info), - in_interrupt() ? GFP_ATOMIC : GFP_KERNEL); - if (!node_info) { - kfree(node); - return -ENOMEM; - } - - spin_lock_init(&node_info->pdg.lock); - INIT_LIST_HEAD(&node_info->pdg.list); - node_info->pdg.sz = 0; - - ud->device.driver_data = node_info; - node->ud = ud; - - priv = netdev_priv(hi->dev); - list_add_tail(&node->list, &priv->ip_node_list); - } - - return 0; -} - - -static 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 = "IPv4 over 1394 Driver", - .id_table = eth1394_id_table, - .update = eth1394_update, - .driver = { - .name = ETH1394_DRIVER_NAME, - .bus = &ieee1394_bus_type, - .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 = *((u64*)&(host->csr.rom->bus_info_data[3])); - u16 maxpayload = 1 << (host->csr.max_rec + 1); - int max_speed = IEEE1394_SPEED_MAX; - - spin_lock_irqsave (&priv->lock, flags); - - memset(priv->ud_list, 0, sizeof(struct node_entry*) * ALL_NODES); - priv->bc_maxpayload = 512; - - /* Determine speed limit */ - for (i = 0; i < host->node_count; i++) - if (max_speed > host->speed_map[NODEID_TO_NODE(host->node_id) * - 64 + i]) - max_speed = host->speed_map[NODEID_TO_NODE(host->node_id) * - 64 + i]; - priv->bc_sspd = max_speed; - - /* We'll use our maxpayload as the default mtu */ - if (set_mtu) { - dev->mtu = min(ETH1394_DATA_LEN, - (int)(maxpayload - - (sizeof(union eth1394_hdr) + - ETHER1394_GASP_OVERHEAD))); - - /* Set our hardware address while we're at it */ - *(u64*)dev->dev_addr = guid; - *(u64*)dev->broadcast = ~0x0ULL; - } - - spin_unlock_irqrestore (&priv->lock, flags); -} - -/* This function is called right before register_netdev */ -static void ether1394_init_dev (struct net_device *dev) -{ - /* Our functions */ - dev->open = ether1394_open; - dev->stop = ether1394_stop; - dev->hard_start_xmit = ether1394_tx; - dev->get_stats = ether1394_stats; - dev->tx_timeout = ether1394_tx_timeout; - dev->change_mtu = ether1394_change_mtu; - - dev->hard_header = ether1394_header; - dev->rebuild_header = ether1394_rebuild_header; - dev->hard_header_cache = ether1394_header_cache; - dev->header_cache_update= ether1394_header_cache_update; - dev->hard_header_parse = ether1394_header_parse; - dev->set_mac_address = ether1394_mac_addr; - SET_ETHTOOL_OPS(dev, ðtool_ops); - - /* Some constants */ - 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; - - ether1394_reset_priv (dev, 1); -} - -/* - * 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; - static int version_printed = 0; - u64 fifo_addr; - - if (!(host->config_roms & HPSB_CONFIG_ROM_ENTRY_IP1394)) - return; - - fifo_addr = hpsb_allocate_and_register_addrspace(ð1394_highlevel, - host, - &addr_ops, - ETHER1394_REGION_ADDR_LEN, - ETHER1394_REGION_ADDR_LEN, - -1, -1); - if (fifo_addr == ~0ULL) - goto out; - - if (version_printed++ == 0) - ETH1394_PRINT_G (KERN_INFO, "%s\n", version); - - /* We should really have our own alloc_hpsbdev() function in - * net_init.c instead of calling the one for ethernet then hijacking - * it for ourselves. That way we'd be a real networking device. */ - dev = alloc_etherdev(sizeof (struct eth1394_priv)); - - if (dev == NULL) { - ETH1394_PRINT_G (KERN_ERR, "Out of memory trying to allocate " - "etherdevice for IEEE 1394 device %s-%d\n", - host->driver->name, host->id); - goto out; - } - - SET_MODULE_OWNER(dev); - 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; - - hi = hpsb_create_hostinfo(ð1394_highlevel, host, sizeof(*hi)); - - if (hi == NULL) { - ETH1394_PRINT_G (KERN_ERR, "Out of memory trying to create " - "hostinfo for IEEE 1394 device %s-%d\n", - host->driver->name, host->id); - goto out; - } - - ether1394_init_dev(dev); - - if (register_netdev (dev)) { - ETH1394_PRINT (KERN_ERR, dev->name, "Error registering network driver\n"); - goto out; - } - - ETH1394_PRINT (KERN_INFO, dev->name, "IEEE-1394 IPv4 over 1394 Ethernet (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; - - priv->iso = hpsb_iso_recv_init(host, - ETHER1394_ISO_BUF_SIZE, - ETHER1394_GASP_BUFFERS, - priv->broadcast_channel, - HPSB_ISO_DMA_PACKET_PER_BUFFER, - 1, ether1394_iso); - if (priv->iso == NULL) { - ETH1394_PRINT(KERN_ERR, dev->name, - "Could not allocate isochronous receive context " - "for the broadcast channel\n"); - priv->bc_state = ETHER1394_BC_ERROR; - } else { - 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; - -out: - if (dev != NULL) - free_netdev(dev); - if (hi) - hpsb_destroy_hostinfo(ð1394_highlevel, host); - - return; -} - -/* Remove a card from our list */ -static void ether1394_remove_host (struct hpsb_host *host) -{ - struct eth1394_host_info *hi; - - hi = hpsb_get_hostinfo(ð1394_highlevel, host); - if (hi != NULL) { - struct eth1394_priv *priv = netdev_priv(hi->dev); - - hpsb_unregister_addrspace(ð1394_highlevel, host, - priv->local_fifo); - - if (priv->iso != NULL) - hpsb_iso_shutdown(priv->iso); - - if (hi->dev) { - unregister_netdev (hi->dev); - free_netdev(hi->dev); - } - } - - return; -} - -/* A reset has just arisen */ -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 == NULL) - return; - - dev = hi->dev; - priv = (struct eth1394_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 = (struct eth1394_node_info*)node->ud->device.driver_data; - - 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, void *daddr, 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; - struct net_device *dev = skb->dev; - - switch (eth->h_proto) { - -#ifdef CONFIG_INET - case __constant_htons(ETH_P_IP): - return arp_find((unsigned char*)ð->h_dest, skb); -#endif - default: - ETH1394_PRINT(KERN_DEBUG, dev->name, - "unable to resolve type %04x addresses.\n", - eth->h_proto); - break; - } - - return 0; -} - -static int ether1394_header_parse(struct sk_buff *skb, unsigned char *haddr) -{ - struct net_device *dev = skb->dev; - memcpy(haddr, dev->dev_addr, ETH1394_ALEN); - return ETH1394_ALEN; -} - - -static int ether1394_header_cache(struct neighbour *neigh, struct hh_cache *hh) -{ - unsigned short type = hh->hh_type; - struct eth1394hdr *eth = (struct eth1394hdr*)(((u8*)hh->hh_data) + - (16 - ETH1394_HLEN)); - struct net_device *dev = neigh->dev; - - if (type == __constant_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, - struct net_device *dev, - unsigned char * haddr) -{ - memcpy(((u8*)hh->hh_data) + (16 - ETH1394_HLEN), haddr, dev->addr_len); -} - -static int ether1394_mac_addr(struct net_device *dev, void *p) -{ - if (netif_running(dev)) - return -EBUSY; - - /* Not going to allow setting the MAC address, we really need to use - * the real one supplied by the hardware */ - return -EINVAL; - } - - - -/****************************************** - * Datagram reception code - ******************************************/ - -/* Copied from net/ethernet/eth.c */ -static inline u16 ether1394_type_trans(struct sk_buff *skb, - struct net_device *dev) -{ - struct eth1394hdr *eth; - unsigned char *rawp; - - skb->mac.raw = skb->data; - 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 inline u16 ether1394_parse_encap(struct sk_buff *skb, - struct net_device *dev, - nodeid_t srcid, nodeid_t destid, - u16 ether_type) -{ - struct eth1394_priv *priv = netdev_priv(dev); - u64 dest_hw; - unsigned short ret = 0; - - /* Setup our hw addresses. We use these to build the - * ethernet header. */ - if (destid == (LOCAL_BUS | ALL_NODES)) - dest_hw = ~0ULL; /* 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 == __constant_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; - - /* 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))); - - node = eth1394_find_node_guid(&priv->ip_node_list, - be64_to_cpu(arp1394->s_uniq_id)); - if (!node) { - return 0; - } - - node_info = (struct eth1394_node_info*)node->ud->device.driver_data; - - /* 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 == 1) - /* just set ARP req target unique ID to 0 */ - *((u64*)arp_ptr) = 0; - else - *((u64*)arp_ptr) = *((u64*)dev->dev_addr); - } - - /* Now add the ethernet header. */ - if (dev->hard_header (skb, dev, __constant_ntohs (ether_type), - &dest_hw, NULL, skb->len) >= 0) - ret = ether1394_type_trans(skb, dev); - - return ret; -} - -static inline int fragment_overlap(struct list_head *frag_list, int offset, int len) -{ - struct fragment_info *fi; - - list_for_each_entry(fi, frag_list, list) { - if ( ! ((offset > (fi->offset + fi->len - 1)) || - ((offset + len - 1) < fi->offset))) - return 1; - } - return 0; -} - -static inline 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 inline 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(struct fragment_info), GFP_ATOMIC); - if (!new) - return -ENOMEM; - - new->offset = offset; - new->len = len; - - list_add(&new->list, lh); - - return 0; -} - -static inline 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(struct partial_datagram), 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 inline 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_del(lh); - list_add(lh, pdgl); - - return 0; -} - -static inline int is_datagram_complete(struct list_head *lh, int dg_size) -{ - struct partial_datagram *pd = list_entry(lh, struct partial_datagram, list); - struct fragment_info *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; - u16 ether_type = 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 (!node) { - HPSB_PRINT(KERN_ERR, "ether1394 rx: sender nodeid " - "lookup failure: " NODE_BUS_FMT, - NODE_BUS_ARGS(priv->host, srcid)); - priv->stats.rx_dropped++; - return -1; - } - ud = node->ud; - - priv->ud_list[NODEID_TO_NODE(srcid)] = ud; - } - - node_info = (struct eth1394_node_info*)ud->device.driver_data; - - /* 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 (!skb) { - HPSB_PRINT (KERN_ERR, "ether1394 rx: low on mem\n"); - priv->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 { - struct partial_datagram *pd; - - 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--; - spin_unlock_irqrestore(&pdg->lock, flags); - goto bad_proto; - } - } else { - retval = update_partial_datagram(pdgl, lh, - buf + hdr_len, - fg_off, fg_len); - if (retval < 0) { - /* Couldn't save off fragment anyway - * so might as well obliterate the - * datagram now. */ - purge_partial_datagram(lh); - pdg->sz--; - spin_unlock_irqrestore(&pdg->lock, flags); - goto bad_proto; - } - } /* fragment overlap */ - } /* new datagram or add to existing one */ - - pd = list_entry(lh, struct partial_datagram, list); - - if (hdr->common.lf == ETH1394_HDR_LF_FF) { - pd->ether_type = ether_type; - } - - if (is_datagram_complete(lh, dg_size)) { - ether_type = pd->ether_type; - pdg->sz--; - skb = skb_get(pd->skb); - purge_partial_datagram(lh); - spin_unlock_irqrestore(&pdg->lock, flags); - } else { - /* Datagram is not complete, we're done for the - * moment. */ - spin_unlock_irqrestore(&pdg->lock, flags); - return 0; - } - } /* unframgented datagram or fragmented one */ - - /* Write metadata, and then pass to the receive level */ - skb->dev = dev; - skb->ip_summed = CHECKSUM_UNNECESSARY; /* don't check it */ - - /* Parse the encapsulation header. This actually does the job of - * converting to an ethernet frame header, aswell as arp - * conversion if needed. ARP conversion is easier in this - * direction, since we are using ethernet as our backend. */ - skb->protocol = ether1394_parse_encap(skb, dev, srcid, destid, - ether_type); - - - spin_lock_irqsave(&priv->lock, flags); - if (!skb->protocol) { - priv->stats.rx_errors++; - priv->stats.rx_dropped++; - dev_kfree_skb_any(skb); - goto bad_proto; - } - - if (netif_rx(skb) == NET_RX_DROP) { - priv->stats.rx_errors++; - priv->stats.rx_dropped++; - goto bad_proto; - } - - /* Statistics */ - priv->stats.rx_packets++; - priv->stats.rx_bytes += skb->len; - -bad_proto: - if (netif_queue_stopped(dev)) - netif_wake_queue(dev); - spin_unlock_irqrestore(&priv->lock, flags); - - dev->last_rx = jiffies; - - return 0; -} - -static int ether1394_write(struct hpsb_host *host, int srcid, int destid, - quadlet_t *data, u64 addr, size_t len, u16 flags) -{ - struct eth1394_host_info *hi; - - hi = hpsb_get_hostinfo(ð1394_highlevel, host); - if (hi == NULL) { - ETH1394_PRINT_G(KERN_ERR, "Could not find net device for host %s\n", - host->driver->name); - return RCODE_ADDRESS_ERROR; - } - - if (ether1394_data_handler(hi->dev, srcid, destid, (char*)data, len)) - return RCODE_ADDRESS_ERROR; - else - return RCODE_COMPLETE; -} - -static void ether1394_iso(struct hpsb_iso *iso) -{ - quadlet_t *data; - char *buf; - struct eth1394_host_info *hi; - struct net_device *dev; - struct eth1394_priv *priv; - unsigned int len; - u32 specifier_id; - u16 source_id; - int i; - int nready; - - hi = hpsb_get_hostinfo(ð1394_highlevel, iso->host); - if (hi == NULL) { - ETH1394_PRINT_G(KERN_ERR, "Could not find net device for host %s\n", - iso->host->driver->name); - return; - } - - dev = hi->dev; - - nready = hpsb_iso_n_ready(iso); - for (i = 0; i < nready; i++) { - struct hpsb_iso_packet_info *info = - &iso->infos[(iso->first_packet + i) % iso->buf_packets]; - data = (quadlet_t*) (iso->data_buf.kvirt + info->offset); - - /* skip over GASP header */ - buf = (char *)data + 8; - len = info->len - 8; - - specifier_id = (((be32_to_cpu(data[0]) & 0xffff) << 8) | - ((be32_to_cpu(data[1]) & 0xff000000) >> 24)); - source_id = be32_to_cpu(data[0]) >> 16; - - priv = netdev_priv(dev); - - if (info->channel != (iso->host->csr.broadcast_channel & 0x3f) || - specifier_id != ETHER1394_GASP_SPECIFIER_ID) { - /* This packet is not for us */ - continue; - } - ether1394_data_handler(dev, source_id, LOCAL_BUS | ALL_NODES, - buf, len); - } - - hpsb_iso_recv_release_packets(iso, i); - - dev->last_rx = jiffies; -} - -/****************************************** - * Datagram transmission code - ******************************************/ - -/* Convert a standard ARP packet to 1394 ARP. The first 8 bytes (the entire - * arphdr) is the same format as the ip1394 header, so they overlap. The rest - * needs to be munged a bit. The remainder of the arphdr is formatted based - * on hwaddr len and ipaddr len. We know what they'll be, so it's easy to - * judge. - * - * Now that the EUI is used for the hardware address all we need to do to make - * this work for 1394 is to insert 2 quadlets that contain max_rec size, - * speed, and unicast FIFO address information between the sender_unique_id - * and the IP addresses. - */ -static inline void ether1394_arp_to_1394arp(struct sk_buff *skb, - struct net_device *dev) -{ - struct eth1394_priv *priv = netdev_priv(dev); - - struct arphdr *arp = (struct arphdr *)skb->data; - unsigned char *arp_ptr = (unsigned char *)(arp + 1); - struct eth1394_arp *arp1394 = (struct eth1394_arp *)skb->data; - - /* Believe it or not, all that need to happen is sender IP get moved - * and set hw_addr_len, max_rec, sspd, fifo_hi and fifo_lo. */ - arp1394->hw_addr_len = 16; - arp1394->sip = *(u32*)(arp_ptr + ETH1394_ALEN); - arp1394->max_rec = priv->host->csr.max_rec; - arp1394->sspd = priv->host->csr.lnk_spd; - arp1394->fifo_hi = htons (priv->local_fifo >> 32); - arp1394->fifo_lo = htonl (priv->local_fifo & ~0x0); - - return; -} - -/* We need to encapsulate the standard header with our own. We use the - * ethernet header's proto for our own. */ -static inline unsigned int ether1394_encapsulate_prep(unsigned int max_payload, - int proto, - union eth1394_hdr *hdr, - u16 dg_size, u16 dgl) -{ - unsigned int adj_max_payload = max_payload - hdr_type_len[ETH1394_HDR_LF_UF]; - - /* Does it all fit in one packet? */ - if (dg_size <= adj_max_payload) { - hdr->uf.lf = ETH1394_HDR_LF_UF; - hdr->uf.ether_type = proto; - } else { - hdr->ff.lf = ETH1394_HDR_LF_FF; - hdr->ff.ether_type = proto; - hdr->ff.dg_size = dg_size - 1; - hdr->ff.dgl = dgl; - adj_max_payload = max_payload - hdr_type_len[ETH1394_HDR_LF_FF]; - } - return((dg_size + (adj_max_payload - 1)) / adj_max_payload); -} - -static inline unsigned int ether1394_encapsulate(struct sk_buff *skb, - unsigned int max_payload, - union eth1394_hdr *hdr) -{ - union eth1394_hdr *bufhdr; - int ftype = hdr->common.lf; - int hdrsz = hdr_type_len[ftype]; - unsigned int adj_max_payload = max_payload - hdrsz; - - switch(ftype) { - case ETH1394_HDR_LF_UF: - bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz); - bufhdr->words.word1 = htons(hdr->words.word1); - bufhdr->words.word2 = hdr->words.word2; - break; - - case ETH1394_HDR_LF_FF: - bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz); - bufhdr->words.word1 = htons(hdr->words.word1); - bufhdr->words.word2 = hdr->words.word2; - bufhdr->words.word3 = htons(hdr->words.word3); - bufhdr->words.word4 = 0; - - /* Set frag type here for future interior fragments */ - hdr->common.lf = ETH1394_HDR_LF_IF; - hdr->sf.fg_off = 0; - break; - - default: - hdr->sf.fg_off += adj_max_payload; - bufhdr = (union eth1394_hdr *)skb_pull(skb, adj_max_payload); - if (max_payload >= skb->len) - hdr->common.lf = ETH1394_HDR_LF_LF; - bufhdr->words.word1 = htons(hdr->words.word1); - bufhdr->words.word2 = htons(hdr->words.word2); - bufhdr->words.word3 = htons(hdr->words.word3); - bufhdr->words.word4 = 0; - } - - return min(max_payload, skb->len); -} - -static inline struct hpsb_packet *ether1394_alloc_common_packet(struct hpsb_host *host) -{ - struct hpsb_packet *p; - - p = hpsb_alloc_packet(0); - if (p) { - p->host = host; - p->generation = get_hpsb_generation(host); - p->type = hpsb_async; - } - return p; -} - -static inline int ether1394_prep_write_packet(struct hpsb_packet *p, - struct hpsb_host *host, - nodeid_t node, u64 addr, - void * data, int tx_len) -{ - p->node_id = node; - p->data = NULL; - - p->tcode = TCODE_WRITEB; - p->header[1] = (host->node_id << 16) | (addr >> 32); - p->header[2] = addr & 0xffffffff; - - p->header_size = 16; - p->expect_response = 1; - - if (hpsb_get_tlabel(p)) { - ETH1394_PRINT_G(KERN_ERR, "No more tlabels left while sending " - "to node " NODE_BUS_FMT "\n", NODE_BUS_ARGS(host, node)); - return -1; - } - p->header[0] = (p->node_id << 16) | (p->tlabel << 10) - | (1 << 8) | (TCODE_WRITEB << 4); - - p->header[3] = tx_len << 16; - p->data_size = (tx_len + 3) & ~3; - p->data = (quadlet_t*)data; - - return 0; -} - -static inline void ether1394_prep_gasp_packet(struct hpsb_packet *p, - struct eth1394_priv *priv, - struct sk_buff *skb, int length) -{ - p->header_size = 4; - p->tcode = TCODE_STREAM_DATA; - - p->header[0] = (length << 16) | (3 << 14) - | ((priv->broadcast_channel) << 8) - | (TCODE_STREAM_DATA << 4); - p->data_size = length; - p->data = ((quadlet_t*)skb->data) - 2; - p->data[0] = cpu_to_be32((priv->host->node_id << 16) | - ETHER1394_GASP_SPECIFIER_ID_HI); - p->data[1] = __constant_cpu_to_be32((ETHER1394_GASP_SPECIFIER_ID_LO << 24) | - ETHER1394_GASP_VERSION); - - /* Setting the node id to ALL_NODES (not LOCAL_BUS | ALL_NODES) - * prevents hpsb_send_packet() from setting the speed to an arbitrary - * value based on packet->node_id if packet->node_id is not set. */ - p->node_id = ALL_NODES; - p->speed_code = priv->bc_sspd; -} - -static inline void ether1394_free_packet(struct hpsb_packet *packet) -{ - if (packet->tcode != TCODE_STREAM_DATA) - hpsb_free_tlabel(packet); - hpsb_free_packet(packet); -} - -static void ether1394_complete_cb(void *__ptask); - -static int ether1394_send_packet(struct packet_task *ptask, unsigned int tx_len) -{ - struct eth1394_priv *priv = ptask->priv; - struct hpsb_packet *packet = NULL; - - packet = ether1394_alloc_common_packet(priv->host); - if (!packet) - return -1; - - if (ptask->tx_type == ETH1394_GASP) { - int length = tx_len + (2 * sizeof(quadlet_t)); - - ether1394_prep_gasp_packet(packet, priv, ptask->skb, length); - } else if (ether1394_prep_write_packet(packet, priv->host, - ptask->dest_node, - ptask->addr, ptask->skb->data, - tx_len)) { - hpsb_free_packet(packet); - return -1; - } - - ptask->packet = packet; - hpsb_set_packet_complete_task(ptask->packet, ether1394_complete_cb, - ptask); - - if (hpsb_send_packet(packet) < 0) { - ether1394_free_packet(packet); - return -1; - } - - return 0; -} - - -/* Task function to be run when a datagram transmission is completed */ -static inline void ether1394_dg_complete(struct packet_task *ptask, int fail) -{ - struct sk_buff *skb = ptask->skb; - struct net_device *dev = skb->dev; - struct eth1394_priv *priv = netdev_priv(dev); - unsigned long flags; - - /* Statistics */ - spin_lock_irqsave(&priv->lock, flags); - if (fail) { - priv->stats.tx_dropped++; - priv->stats.tx_errors++; - } else { - priv->stats.tx_bytes += skb->len; - priv->stats.tx_packets++; - } - spin_unlock_irqrestore(&priv->lock, flags); - - dev_kfree_skb_any(skb); - kmem_cache_free(packet_task_cache, ptask); -} - - -/* Callback for when a packet has been sent and the status of that packet is - * known */ -static void ether1394_complete_cb(void *__ptask) -{ - struct packet_task *ptask = (struct packet_task *)__ptask; - struct hpsb_packet *packet = ptask->packet; - int fail = 0; - - if (packet->tcode != TCODE_STREAM_DATA) - fail = hpsb_packet_success(packet); - - ether1394_free_packet(packet); - - ptask->outstanding_pkts--; - if (ptask->outstanding_pkts > 0 && !fail) { - int tx_len; - - /* Add the encapsulation header to the fragment */ - tx_len = ether1394_encapsulate(ptask->skb, ptask->max_payload, - &ptask->hdr); - if (ether1394_send_packet(ptask, tx_len)) - ether1394_dg_complete(ptask, 1); - } else { - ether1394_dg_complete(ptask, fail); - } -} - - - -/* Transmit a packet (called by kernel) */ -static int ether1394_tx (struct sk_buff *skb, struct net_device *dev) -{ - gfp_t kmflags = in_interrupt() ? GFP_ATOMIC : GFP_KERNEL; - struct eth1394hdr *eth; - struct eth1394_priv *priv = netdev_priv(dev); - int proto; - unsigned long flags; - nodeid_t dest_node; - eth1394_tx_type tx_type; - int ret = 0; - unsigned int tx_len; - unsigned int max_payload; - u16 dg_size; - u16 dgl; - struct packet_task *ptask; - struct eth1394_node_ref *node; - struct eth1394_node_info *node_info = NULL; - - ptask = kmem_cache_alloc(packet_task_cache, kmflags); - if (ptask == NULL) { - ret = -ENOMEM; - goto fail; - } - - /* XXX Ignore this for now. Noticed that when MacOSX is the IRM, - * it does not set our validity bit. We need to compensate for - * that somewhere else, but not in eth1394. */ -#if 0 - if ((priv->host->csr.broadcast_channel & 0xc0000000) != 0xc0000000) { - ret = -EAGAIN; - goto fail; - } -#endif - - if ((skb = skb_share_check (skb, kmflags)) == NULL) { - ret = -ENOMEM; - goto fail; - } - - /* Get rid of the fake eth1394 header, but save a pointer */ - eth = (struct eth1394hdr*)skb->data; - skb_pull(skb, ETH1394_HLEN); - - proto = eth->h_proto; - dg_size = skb->len; - - /* Set the transmission type for the packet. ARP packets and IP - * broadcast packets are sent via GASP. */ - if (memcmp(eth->h_dest, dev->broadcast, ETH1394_ALEN) == 0 || - proto == __constant_htons(ETH_P_ARP) || - (proto == __constant_htons(ETH_P_IP) && - IN_MULTICAST(__constant_ntohl(skb->nh.iph->daddr)))) { - tx_type = ETH1394_GASP; - dest_node = LOCAL_BUS | ALL_NODES; - max_payload = priv->bc_maxpayload - ETHER1394_GASP_OVERHEAD; - BUG_ON(max_payload < (512 - ETHER1394_GASP_OVERHEAD)); - dgl = priv->bc_dgl; - if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF]) - priv->bc_dgl++; - } else { - node = eth1394_find_node_guid(&priv->ip_node_list, - be64_to_cpu(*(u64*)eth->h_dest)); - if (!node) { - ret = -EAGAIN; - goto fail; - } - node_info = (struct eth1394_node_info*)node->ud->device.driver_data; - if (node_info->fifo == ETHER1394_INVALID_ADDR) { - ret = -EAGAIN; - goto fail; - } - - dest_node = node->ud->ne->nodeid; - max_payload = node_info->maxpayload; - BUG_ON(max_payload < (512 - ETHER1394_GASP_OVERHEAD)); - - dgl = node_info->dgl; - if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF]) - node_info->dgl++; - tx_type = ETH1394_WRREQ; - } - - /* If this is an ARP packet, convert it */ - if (proto == __constant_htons (ETH_P_ARP)) - ether1394_arp_to_1394arp (skb, dev); - - ptask->hdr.words.word1 = 0; - ptask->hdr.words.word2 = 0; - ptask->hdr.words.word3 = 0; - ptask->hdr.words.word4 = 0; - ptask->skb = skb; - ptask->priv = priv; - ptask->tx_type = tx_type; - - if (tx_type != ETH1394_GASP) { - u64 addr; - - spin_lock_irqsave(&priv->lock, flags); - addr = node_info->fifo; - spin_unlock_irqrestore(&priv->lock, flags); - - ptask->addr = addr; - ptask->dest_node = dest_node; - } - - ptask->tx_type = tx_type; - ptask->max_payload = max_payload; - ptask->outstanding_pkts = ether1394_encapsulate_prep(max_payload, proto, - &ptask->hdr, dg_size, - dgl); - - /* Add the encapsulation header to the fragment */ - tx_len = ether1394_encapsulate(skb, max_payload, &ptask->hdr); - dev->trans_start = jiffies; - if (ether1394_send_packet(ptask, tx_len)) - goto fail; - - netif_wake_queue(dev); - return 0; -fail: - if (ptask) - kmem_cache_free(packet_task_cache, ptask); - - if (skb != NULL) - dev_kfree_skb(skb); - - spin_lock_irqsave (&priv->lock, flags); - priv->stats.tx_dropped++; - priv->stats.tx_errors++; - spin_unlock_irqrestore (&priv->lock, flags); - - if (netif_queue_stopped(dev)) - netif_wake_queue(dev); - - return 0; /* returning non-zero causes serious problems */ -} - -static void ether1394_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) -{ - strcpy (info->driver, driver_name); - strcpy (info->version, "$Rev: 1312 $"); - /* FIXME XXX provide sane businfo */ - strcpy (info->bus_info, "ieee1394"); -} - -static struct ethtool_ops ethtool_ops = { - .get_drvinfo = ether1394_get_drvinfo -}; - -static int __init ether1394_init_module (void) -{ - packet_task_cache = kmem_cache_create("packet_task", sizeof(struct packet_task), - 0, 0, NULL, NULL); - - /* Register ourselves as a highlevel driver */ - hpsb_register_highlevel(ð1394_highlevel); - - return hpsb_register_protocol(ð1394_proto_driver); -} - -static void __exit ether1394_exit_module (void) -{ - hpsb_unregister_protocol(ð1394_proto_driver); - hpsb_unregister_highlevel(ð1394_highlevel); - kmem_cache_destroy(packet_task_cache); -} - -module_init(ether1394_init_module); -module_exit(ether1394_exit_module); |