Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/ieee1394/eth1394.c b/drivers/ieee1394/eth1394.c
new file mode 100644
index 0000000..654da76
--- /dev/null
+++ b/drivers/ieee1394/eth1394.c
@@ -0,0 +1,1801 @@
+/*
+ * 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: 1247 $ 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_GASP_BUFFERS * 2 *
+ (1 << (priv->host->csr.max_rec +
+ 1)),
+ 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_GASP_BUFFERS * 2 *
+ (1 << (host->csr.max_rec + 1))),
+ 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 = 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)
+{
+ int 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: 1247 $");
+ /* 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);