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path: root/drivers/ieee1394/eth1394.c
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Diffstat (limited to 'drivers/ieee1394/eth1394.c')
-rw-r--r--drivers/ieee1394/eth1394.c1720
1 files changed, 0 insertions, 1720 deletions
diff --git a/drivers/ieee1394/eth1394.c b/drivers/ieee1394/eth1394.c
deleted file mode 100644
index 63403822330..00000000000
--- a/drivers/ieee1394/eth1394.c
+++ /dev/null
@@ -1,1720 +0,0 @@
-/*
- * eth1394.c -- IPv4 driver for Linux IEEE-1394 Subsystem
- *
- * Copyright (C) 2001-2003 Ben Collins <bcollins@debian.org>
- * 2000 Bonin Franck <boninf@free.fr>
- * 2003 Steve Kinneberg <kinnebergsteve@acmsystems.com>
- *
- * Mainly based on work by Emanuel Pirker and Andreas E. Bombe
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-
-/*
- * This driver intends to support RFC 2734, which describes a method for
- * transporting IPv4 datagrams over IEEE-1394 serial busses.
- *
- * TODO:
- * RFC 2734 related:
- * - Add MCAP. Limited Multicast exists only to 224.0.0.1 and 224.0.0.2.
- *
- * Non-RFC 2734 related:
- * - Handle fragmented skb's coming from the networking layer.
- * - Move generic GASP reception to core 1394 code
- * - Convert kmalloc/kfree for link fragments to use kmem_cache_* instead
- * - Stability improvements
- * - Performance enhancements
- * - Consider garbage collecting old partial datagrams after X amount of time
- */
-
-#include <linux/module.h>
-
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/delay.h>
-#include <linux/init.h>
-#include <linux/workqueue.h>
-
-#include <linux/netdevice.h>
-#include <linux/inetdevice.h>
-#include <linux/if_arp.h>
-#include <linux/if_ether.h>
-#include <linux/ip.h>
-#include <linux/in.h>
-#include <linux/tcp.h>
-#include <linux/skbuff.h>
-#include <linux/bitops.h>
-#include <asm/uaccess.h>
-#include <asm/delay.h>
-#include <asm/unaligned.h>
-#include <net/arp.h>
-
-#include "config_roms.h"
-#include "csr1212.h"
-#include "eth1394.h"
-#include "highlevel.h"
-#include "ieee1394.h"
-#include "ieee1394_core.h"
-#include "ieee1394_hotplug.h"
-#include "ieee1394_transactions.h"
-#include "ieee1394_types.h"
-#include "iso.h"
-#include "nodemgr.h"
-
-#define ETH1394_PRINT_G(level, fmt, args...) \
- printk(level "%s: " fmt, driver_name, ## args)
-
-#define ETH1394_PRINT(level, dev_name, fmt, args...) \
- printk(level "%s: %s: " fmt, driver_name, dev_name, ## args)
-
-struct fragment_info {
- struct list_head list;
- int offset;
- int len;
-};
-
-struct partial_datagram {
- struct list_head list;
- u16 dgl;
- u16 dg_size;
- __be16 ether_type;
- struct sk_buff *skb;
- char *pbuf;
- struct list_head frag_info;
-};
-
-struct pdg_list {
- struct list_head list; /* partial datagram list per node */
- unsigned int sz; /* partial datagram list size per node */
- spinlock_t lock; /* partial datagram lock */
-};
-
-struct eth1394_host_info {
- struct hpsb_host *host;
- struct net_device *dev;
-};
-
-struct eth1394_node_ref {
- struct unit_directory *ud;
- struct list_head list;
-};
-
-struct eth1394_node_info {
- u16 maxpayload; /* max payload */
- u8 sspd; /* max speed */
- u64 fifo; /* FIFO address */
- struct pdg_list pdg; /* partial RX datagram lists */
- int dgl; /* outgoing datagram label */
-};
-
-static const char driver_name[] = "eth1394";
-
-static struct kmem_cache *packet_task_cache;
-
-static struct hpsb_highlevel eth1394_highlevel;
-
-/* Use common.lf to determine header len */
-static const int hdr_type_len[] = {
- sizeof(struct eth1394_uf_hdr),
- sizeof(struct eth1394_ff_hdr),
- sizeof(struct eth1394_sf_hdr),
- sizeof(struct eth1394_sf_hdr)
-};
-
-static const u16 eth1394_speedto_maxpayload[] = {
-/* S100, S200, S400, S800, S1600, S3200 */
- 512, 1024, 2048, 4096, 4096, 4096
-};
-
-MODULE_AUTHOR("Ben Collins (bcollins@debian.org)");
-MODULE_DESCRIPTION("IEEE 1394 IPv4 Driver (IPv4-over-1394 as per RFC 2734)");
-MODULE_LICENSE("GPL");
-
-/*
- * The max_partial_datagrams parameter is the maximum number of fragmented
- * datagrams per node that eth1394 will keep in memory. Providing an upper
- * bound allows us to limit the amount of memory that partial datagrams
- * consume in the event that some partial datagrams are never completed.
- */
-static int max_partial_datagrams = 25;
-module_param(max_partial_datagrams, int, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(max_partial_datagrams,
- "Maximum number of partially received fragmented datagrams "
- "(default = 25).");
-
-
-static int ether1394_header(struct sk_buff *skb, struct net_device *dev,
- unsigned short type, const void *daddr,
- const void *saddr, unsigned len);
-static int ether1394_rebuild_header(struct sk_buff *skb);
-static int ether1394_header_parse(const struct sk_buff *skb,
- unsigned char *haddr);
-static int ether1394_header_cache(const struct neighbour *neigh,
- struct hh_cache *hh);
-static void ether1394_header_cache_update(struct hh_cache *hh,
- const struct net_device *dev,
- const unsigned char *haddr);
-static netdev_tx_t ether1394_tx(struct sk_buff *skb,
- struct net_device *dev);
-static void ether1394_iso(struct hpsb_iso *iso);
-
-static int ether1394_write(struct hpsb_host *host, int srcid, int destid,
- quadlet_t *data, u64 addr, size_t len, u16 flags);
-static void ether1394_add_host(struct hpsb_host *host);
-static void ether1394_remove_host(struct hpsb_host *host);
-static void ether1394_host_reset(struct hpsb_host *host);
-
-/* Function for incoming 1394 packets */
-static const struct hpsb_address_ops addr_ops = {
- .write = ether1394_write,
-};
-
-/* Ieee1394 highlevel driver functions */
-static struct hpsb_highlevel eth1394_highlevel = {
- .name = driver_name,
- .add_host = ether1394_add_host,
- .remove_host = ether1394_remove_host,
- .host_reset = ether1394_host_reset,
-};
-
-static int ether1394_recv_init(struct eth1394_priv *priv)
-{
- unsigned int iso_buf_size;
-
- /* FIXME: rawiso limits us to PAGE_SIZE */
- iso_buf_size = min((unsigned int)PAGE_SIZE,
- 2 * (1U << (priv->host->csr.max_rec + 1)));
-
- priv->iso = hpsb_iso_recv_init(priv->host,
- ETHER1394_GASP_BUFFERS * iso_buf_size,
- ETHER1394_GASP_BUFFERS,
- priv->broadcast_channel,
- HPSB_ISO_DMA_PACKET_PER_BUFFER,
- 1, ether1394_iso);
- if (priv->iso == NULL) {
- ETH1394_PRINT_G(KERN_ERR, "Failed to allocate IR context\n");
- priv->bc_state = ETHER1394_BC_ERROR;
- return -EAGAIN;
- }
-
- if (hpsb_iso_recv_start(priv->iso, -1, (1 << 3), -1) < 0)
- priv->bc_state = ETHER1394_BC_STOPPED;
- else
- priv->bc_state = ETHER1394_BC_RUNNING;
- return 0;
-}
-
-/* This is called after an "ifup" */
-static int ether1394_open(struct net_device *dev)
-{
- struct eth1394_priv *priv = netdev_priv(dev);
- int ret;
-
- if (priv->bc_state == ETHER1394_BC_ERROR) {
- ret = ether1394_recv_init(priv);
- if (ret)
- return ret;
- }
- netif_start_queue(dev);
- return 0;
-}
-
-/* This is called after an "ifdown" */
-static int ether1394_stop(struct net_device *dev)
-{
- /* flush priv->wake */
- flush_scheduled_work();
-
- netif_stop_queue(dev);
- return 0;
-}
-
-/* FIXME: What to do if we timeout? I think a host reset is probably in order,
- * so that's what we do. Should we increment the stat counters too? */
-static void ether1394_tx_timeout(struct net_device *dev)
-{
- struct hpsb_host *host =
- ((struct eth1394_priv *)netdev_priv(dev))->host;
-
- ETH1394_PRINT(KERN_ERR, dev->name, "Timeout, resetting host\n");
- ether1394_host_reset(host);
-}
-
-static inline int ether1394_max_mtu(struct hpsb_host* host)
-{
- return (1 << (host->csr.max_rec + 1))
- - sizeof(union eth1394_hdr) - ETHER1394_GASP_OVERHEAD;
-}
-
-static int ether1394_change_mtu(struct net_device *dev, int new_mtu)
-{
- int max_mtu;
-
- if (new_mtu < 68)
- return -EINVAL;
-
- max_mtu = ether1394_max_mtu(
- ((struct eth1394_priv *)netdev_priv(dev))->host);
- if (new_mtu > max_mtu) {
- ETH1394_PRINT(KERN_INFO, dev->name,
- "Local node constrains MTU to %d\n", max_mtu);
- return -ERANGE;
- }
-
- dev->mtu = new_mtu;
- return 0;
-}
-
-static void purge_partial_datagram(struct list_head *old)
-{
- struct partial_datagram *pd;
- struct list_head *lh, *n;
- struct fragment_info *fi;
-
- pd = list_entry(old, struct partial_datagram, list);
-
- list_for_each_safe(lh, n, &pd->frag_info) {
- fi = list_entry(lh, struct fragment_info, list);
- list_del(lh);
- kfree(fi);
- }
- list_del(old);
- kfree_skb(pd->skb);
- kfree(pd);
-}
-
-/******************************************
- * 1394 bus activity functions
- ******************************************/
-
-static struct eth1394_node_ref *eth1394_find_node(struct list_head *inl,
- struct unit_directory *ud)
-{
- struct eth1394_node_ref *node;
-
- list_for_each_entry(node, inl, list)
- if (node->ud == ud)
- return node;
-
- return NULL;
-}
-
-static struct eth1394_node_ref *eth1394_find_node_guid(struct list_head *inl,
- u64 guid)
-{
- struct eth1394_node_ref *node;
-
- list_for_each_entry(node, inl, list)
- if (node->ud->ne->guid == guid)
- return node;
-
- return NULL;
-}
-
-static struct eth1394_node_ref *eth1394_find_node_nodeid(struct list_head *inl,
- nodeid_t nodeid)
-{
- struct eth1394_node_ref *node;
-
- list_for_each_entry(node, inl, list)
- if (node->ud->ne->nodeid == nodeid)
- return node;
-
- return NULL;
-}
-
-static int eth1394_new_node(struct eth1394_host_info *hi,
- struct unit_directory *ud)
-{
- struct eth1394_priv *priv;
- struct eth1394_node_ref *new_node;
- struct eth1394_node_info *node_info;
-
- new_node = kmalloc(sizeof(*new_node), GFP_KERNEL);
- if (!new_node)
- return -ENOMEM;
-
- node_info = kmalloc(sizeof(*node_info), GFP_KERNEL);
- if (!node_info) {
- kfree(new_node);
- return -ENOMEM;
- }
-
- spin_lock_init(&node_info->pdg.lock);
- INIT_LIST_HEAD(&node_info->pdg.list);
- node_info->pdg.sz = 0;
- node_info->fifo = CSR1212_INVALID_ADDR_SPACE;
-
- dev_set_drvdata(&ud->device, node_info);
- new_node->ud = ud;
-
- priv = netdev_priv(hi->dev);
- list_add_tail(&new_node->list, &priv->ip_node_list);
- return 0;
-}
-
-static int eth1394_probe(struct device *dev)
-{
- struct unit_directory *ud;
- struct eth1394_host_info *hi;
-
- ud = container_of(dev, struct unit_directory, device);
- hi = hpsb_get_hostinfo(&eth1394_highlevel, ud->ne->host);
- if (!hi)
- return -ENOENT;
-
- return eth1394_new_node(hi, ud);
-}
-
-static int eth1394_remove(struct device *dev)
-{
- struct unit_directory *ud;
- struct eth1394_host_info *hi;
- struct eth1394_priv *priv;
- struct eth1394_node_ref *old_node;
- struct eth1394_node_info *node_info;
- struct list_head *lh, *n;
- unsigned long flags;
-
- ud = container_of(dev, struct unit_directory, device);
- hi = hpsb_get_hostinfo(&eth1394_highlevel, ud->ne->host);
- if (!hi)
- return -ENOENT;
-
- priv = netdev_priv(hi->dev);
-
- old_node = eth1394_find_node(&priv->ip_node_list, ud);
- if (!old_node)
- return 0;
-
- list_del(&old_node->list);
- kfree(old_node);
-
- node_info = dev_get_drvdata(&ud->device);
-
- spin_lock_irqsave(&node_info->pdg.lock, flags);
- /* The partial datagram list should be empty, but we'll just
- * make sure anyway... */
- list_for_each_safe(lh, n, &node_info->pdg.list)
- purge_partial_datagram(lh);
- spin_unlock_irqrestore(&node_info->pdg.lock, flags);
-
- kfree(node_info);
- dev_set_drvdata(&ud->device, NULL);
- return 0;
-}
-
-static int eth1394_update(struct unit_directory *ud)
-{
- struct eth1394_host_info *hi;
- struct eth1394_priv *priv;
- struct eth1394_node_ref *node;
-
- hi = hpsb_get_hostinfo(&eth1394_highlevel, ud->ne->host);
- if (!hi)
- return -ENOENT;
-
- priv = netdev_priv(hi->dev);
- node = eth1394_find_node(&priv->ip_node_list, ud);
- if (node)
- return 0;
-
- return eth1394_new_node(hi, ud);
-}
-
-static const struct ieee1394_device_id eth1394_id_table[] = {
- {
- .match_flags = (IEEE1394_MATCH_SPECIFIER_ID |
- IEEE1394_MATCH_VERSION),
- .specifier_id = ETHER1394_GASP_SPECIFIER_ID,
- .version = ETHER1394_GASP_VERSION,
- },
- {}
-};
-
-MODULE_DEVICE_TABLE(ieee1394, eth1394_id_table);
-
-static struct hpsb_protocol_driver eth1394_proto_driver = {
- .name = driver_name,
- .id_table = eth1394_id_table,
- .update = eth1394_update,
- .driver = {
- .probe = eth1394_probe,
- .remove = eth1394_remove,
- },
-};
-
-static void ether1394_reset_priv(struct net_device *dev, int set_mtu)
-{
- unsigned long flags;
- int i;
- struct eth1394_priv *priv = netdev_priv(dev);
- struct hpsb_host *host = priv->host;
- u64 guid = get_unaligned((u64 *)&(host->csr.rom->bus_info_data[3]));
- int max_speed = IEEE1394_SPEED_MAX;
-
- spin_lock_irqsave(&priv->lock, flags);
-
- memset(priv->ud_list, 0, sizeof(priv->ud_list));
- priv->bc_maxpayload = 512;
-
- /* Determine speed limit */
- /* FIXME: This is broken for nodes with link speed < PHY speed,
- * and it is suboptimal for S200B...S800B hardware.
- * The result of nodemgr's speed probe should be used somehow. */
- for (i = 0; i < host->node_count; i++) {
- /* take care of S100B...S400B PHY ports */
- if (host->speed[i] == SELFID_SPEED_UNKNOWN) {
- max_speed = IEEE1394_SPEED_100;
- break;
- }
- if (max_speed > host->speed[i])
- max_speed = host->speed[i];
- }
- priv->bc_sspd = max_speed;
-
- if (set_mtu) {
- /* Use the RFC 2734 default 1500 octets or the maximum payload
- * as initial MTU */
- dev->mtu = min(1500, ether1394_max_mtu(host));
-
- /* Set our hardware address while we're at it */
- memcpy(dev->dev_addr, &guid, sizeof(u64));
- memset(dev->broadcast, 0xff, sizeof(u64));
- }
-
- spin_unlock_irqrestore(&priv->lock, flags);
-}
-
-static const struct header_ops ether1394_header_ops = {
- .create = ether1394_header,
- .rebuild = ether1394_rebuild_header,
- .cache = ether1394_header_cache,
- .cache_update = ether1394_header_cache_update,
- .parse = ether1394_header_parse,
-};
-
-static const struct net_device_ops ether1394_netdev_ops = {
- .ndo_open = ether1394_open,
- .ndo_stop = ether1394_stop,
- .ndo_start_xmit = ether1394_tx,
- .ndo_tx_timeout = ether1394_tx_timeout,
- .ndo_change_mtu = ether1394_change_mtu,
-};
-
-static void ether1394_init_dev(struct net_device *dev)
-{
-
- dev->header_ops = &ether1394_header_ops;
- dev->netdev_ops = &ether1394_netdev_ops;
-
- dev->watchdog_timeo = ETHER1394_TIMEOUT;
- dev->flags = IFF_BROADCAST | IFF_MULTICAST;
- dev->features = NETIF_F_HIGHDMA;
- dev->addr_len = ETH1394_ALEN;
- dev->hard_header_len = ETH1394_HLEN;
- dev->type = ARPHRD_IEEE1394;
-
- /* FIXME: This value was copied from ether_setup(). Is it too much? */
- dev->tx_queue_len = 1000;
-}
-
-/*
- * Wake the queue up after commonly encountered transmit failure conditions are
- * hopefully over. Currently only tlabel exhaustion is accounted for.
- */
-static void ether1394_wake_queue(struct work_struct *work)
-{
- struct eth1394_priv *priv;
- struct hpsb_packet *packet;
-
- priv = container_of(work, struct eth1394_priv, wake);
- packet = hpsb_alloc_packet(0);
-
- /* This is really bad, but unjam the queue anyway. */
- if (!packet)
- goto out;
-
- packet->host = priv->host;
- packet->node_id = priv->wake_node;
- /*
- * A transaction label is all we really want. If we get one, it almost
- * always means we can get a lot more because the ieee1394 core recycled
- * a whole batch of tlabels, at last.
- */
- if (hpsb_get_tlabel(packet) == 0)
- hpsb_free_tlabel(packet);
-
- hpsb_free_packet(packet);
-out:
- netif_wake_queue(priv->wake_dev);
-}
-
-/*
- * This function is called every time a card is found. It is generally called
- * when the module is installed. This is where we add all of our ethernet
- * devices. One for each host.
- */
-static void ether1394_add_host(struct hpsb_host *host)
-{
- struct eth1394_host_info *hi = NULL;
- struct net_device *dev = NULL;
- struct eth1394_priv *priv;
- u64 fifo_addr;
-
- if (hpsb_config_rom_ip1394_add(host) != 0) {
- ETH1394_PRINT_G(KERN_ERR, "Can't add IP-over-1394 ROM entry\n");
- return;
- }
-
- fifo_addr = hpsb_allocate_and_register_addrspace(
- &eth1394_highlevel, host, &addr_ops,
- ETHER1394_REGION_ADDR_LEN, ETHER1394_REGION_ADDR_LEN,
- CSR1212_INVALID_ADDR_SPACE, CSR1212_INVALID_ADDR_SPACE);
- if (fifo_addr == CSR1212_INVALID_ADDR_SPACE) {
- ETH1394_PRINT_G(KERN_ERR, "Cannot register CSR space\n");
- hpsb_config_rom_ip1394_remove(host);
- return;
- }
-
- dev = alloc_netdev(sizeof(*priv), "eth%d", ether1394_init_dev);
- if (dev == NULL) {
- ETH1394_PRINT_G(KERN_ERR, "Out of memory\n");
- goto out;
- }
-
- SET_NETDEV_DEV(dev, &host->device);
-
- priv = netdev_priv(dev);
- INIT_LIST_HEAD(&priv->ip_node_list);
- spin_lock_init(&priv->lock);
- priv->host = host;
- priv->local_fifo = fifo_addr;
- INIT_WORK(&priv->wake, ether1394_wake_queue);
- priv->wake_dev = dev;
-
- hi = hpsb_create_hostinfo(&eth1394_highlevel, host, sizeof(*hi));
- if (hi == NULL) {
- ETH1394_PRINT_G(KERN_ERR, "Out of memory\n");
- goto out;
- }
-
- ether1394_reset_priv(dev, 1);
-
- if (register_netdev(dev)) {
- ETH1394_PRINT_G(KERN_ERR, "Cannot register the driver\n");
- goto out;
- }
-
- ETH1394_PRINT(KERN_INFO, dev->name, "IPv4 over IEEE 1394 (fw-host%d)\n",
- host->id);
-
- hi->host = host;
- hi->dev = dev;
-
- /* Ignore validity in hopes that it will be set in the future. It'll
- * be checked when the eth device is opened. */
- priv->broadcast_channel = host->csr.broadcast_channel & 0x3f;
-
- ether1394_recv_init(priv);
- return;
-out:
- if (dev)
- free_netdev(dev);
- if (hi)
- hpsb_destroy_hostinfo(&eth1394_highlevel, host);
- hpsb_unregister_addrspace(&eth1394_highlevel, host, fifo_addr);
- hpsb_config_rom_ip1394_remove(host);
-}
-
-/* Remove a card from our list */
-static void ether1394_remove_host(struct hpsb_host *host)
-{
- struct eth1394_host_info *hi;
- struct eth1394_priv *priv;
-
- hi = hpsb_get_hostinfo(&eth1394_highlevel, host);
- if (!hi)
- return;
- priv = netdev_priv(hi->dev);
- hpsb_unregister_addrspace(&eth1394_highlevel, host, priv->local_fifo);
- hpsb_config_rom_ip1394_remove(host);
- if (priv->iso)
- hpsb_iso_shutdown(priv->iso);
- unregister_netdev(hi->dev);
- free_netdev(hi->dev);
-}
-
-/* A bus reset happened */
-static void ether1394_host_reset(struct hpsb_host *host)
-{
- struct eth1394_host_info *hi;
- struct eth1394_priv *priv;
- struct net_device *dev;
- struct list_head *lh, *n;
- struct eth1394_node_ref *node;
- struct eth1394_node_info *node_info;
- unsigned long flags;
-
- hi = hpsb_get_hostinfo(&eth1394_highlevel, host);
-
- /* This can happen for hosts that we don't use */
- if (!hi)
- return;
-
- dev = hi->dev;
- priv = netdev_priv(dev);
-
- /* Reset our private host data, but not our MTU */
- netif_stop_queue(dev);
- ether1394_reset_priv(dev, 0);
-
- list_for_each_entry(node, &priv->ip_node_list, list) {
- node_info = dev_get_drvdata(&node->ud->device);
-
- spin_lock_irqsave(&node_info->pdg.lock, flags);
-
- list_for_each_safe(lh, n, &node_info->pdg.list)
- purge_partial_datagram(lh);
-
- INIT_LIST_HEAD(&(node_info->pdg.list));
- node_info->pdg.sz = 0;
-
- spin_unlock_irqrestore(&node_info->pdg.lock, flags);
- }
-
- netif_wake_queue(dev);
-}
-
-/******************************************
- * HW Header net device functions
- ******************************************/
-/* These functions have been adapted from net/ethernet/eth.c */
-
-/* Create a fake MAC header for an arbitrary protocol layer.
- * saddr=NULL means use device source address
- * daddr=NULL means leave destination address (eg unresolved arp). */
-static int ether1394_header(struct sk_buff *skb, struct net_device *dev,
- unsigned short type, const void *daddr,
- const void *saddr, unsigned len)
-{
- struct eth1394hdr *eth =
- (struct eth1394hdr *)skb_push(skb, ETH1394_HLEN);
-
- eth->h_proto = htons(type);
-
- if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) {
- memset(eth->h_dest, 0, dev->addr_len);
- return dev->hard_header_len;
- }
-
- if (daddr) {
- memcpy(eth->h_dest, daddr, dev->addr_len);
- return dev->hard_header_len;
- }
-
- return -dev->hard_header_len;
-}
-
-/* Rebuild the faked MAC header. This is called after an ARP
- * (or in future other address resolution) has completed on this
- * sk_buff. We now let ARP fill in the other fields.
- *
- * This routine CANNOT use cached dst->neigh!
- * Really, it is used only when dst->neigh is wrong.
- */
-static int ether1394_rebuild_header(struct sk_buff *skb)
-{
- struct eth1394hdr *eth = (struct eth1394hdr *)skb->data;
-
- if (eth->h_proto == htons(ETH_P_IP))
- return arp_find((unsigned char *)&eth->h_dest, skb);
-
- ETH1394_PRINT(KERN_DEBUG, skb->dev->name,
- "unable to resolve type %04x addresses\n",
- ntohs(eth->h_proto));
- return 0;
-}
-
-static int ether1394_header_parse(const struct sk_buff *skb,
- unsigned char *haddr)
-{
- memcpy(haddr, skb->dev->dev_addr, ETH1394_ALEN);
- return ETH1394_ALEN;
-}
-
-static int ether1394_header_cache(const struct neighbour *neigh,
- struct hh_cache *hh)
-{
- __be16 type = hh->hh_type;
- struct net_device *dev = neigh->dev;
- struct eth1394hdr *eth =
- (struct eth1394hdr *)((u8 *)hh->hh_data + 16 - ETH1394_HLEN);
-
- if (type == htons(ETH_P_802_3))
- return -1;
-
- eth->h_proto = type;
- memcpy(eth->h_dest, neigh->ha, dev->addr_len);
-
- hh->hh_len = ETH1394_HLEN;
- return 0;
-}
-
-/* Called by Address Resolution module to notify changes in address. */
-static void ether1394_header_cache_update(struct hh_cache *hh,
- const struct net_device *dev,
- const unsigned char * haddr)
-{
- memcpy((u8 *)hh->hh_data + 16 - ETH1394_HLEN, haddr, dev->addr_len);
-}
-
-/******************************************
- * Datagram reception code
- ******************************************/
-
-/* Copied from net/ethernet/eth.c */
-static __be16 ether1394_type_trans(struct sk_buff *skb, struct net_device *dev)
-{
- struct eth1394hdr *eth;
- unsigned char *rawp;
-
- skb_reset_mac_header(skb);
- skb_pull(skb, ETH1394_HLEN);
- eth = eth1394_hdr(skb);
-
- if (*eth->h_dest & 1) {
- if (memcmp(eth->h_dest, dev->broadcast, dev->addr_len) == 0)
- skb->pkt_type = PACKET_BROADCAST;
-#if 0
- else
- skb->pkt_type = PACKET_MULTICAST;
-#endif
- } else {
- if (memcmp(eth->h_dest, dev->dev_addr, dev->addr_len))
- skb->pkt_type = PACKET_OTHERHOST;
- }
-
- if (ntohs(eth->h_proto) >= 1536)
- return eth->h_proto;
-
- rawp = skb->data;
-
- if (*(unsigned short *)rawp == 0xFFFF)
- return htons(ETH_P_802_3);
-
- return htons(ETH_P_802_2);
-}
-
-/* Parse an encapsulated IP1394 header into an ethernet frame packet.
- * We also perform ARP translation here, if need be. */
-static __be16 ether1394_parse_encap(struct sk_buff *skb, struct net_device *dev,
- nodeid_t srcid, nodeid_t destid,
- __be16 ether_type)
-{
- struct eth1394_priv *priv = netdev_priv(dev);
- __be64 dest_hw;
- __be16 ret = 0;
-
- /* Setup our hw addresses. We use these to build the ethernet header. */
- if (destid == (LOCAL_BUS | ALL_NODES))
- dest_hw = ~cpu_to_be64(0); /* broadcast */
- else
- dest_hw = cpu_to_be64((u64)priv->host->csr.guid_hi << 32 |
- priv->host->csr.guid_lo);
-
- /* If this is an ARP packet, convert it. First, we want to make
- * use of some of the fields, since they tell us a little bit
- * about the sending machine. */
- if (ether_type == htons(ETH_P_ARP)) {
- struct eth1394_arp *arp1394 = (struct eth1394_arp *)skb->data;
- struct arphdr *arp = (struct arphdr *)skb->data;
- unsigned char *arp_ptr = (unsigned char *)(arp + 1);
- u64 fifo_addr = (u64)ntohs(arp1394->fifo_hi) << 32 |
- ntohl(arp1394->fifo_lo);
- u8 max_rec = min(priv->host->csr.max_rec,
- (u8)(arp1394->max_rec));
- int sspd = arp1394->sspd;
- u16 maxpayload;
- struct eth1394_node_ref *node;
- struct eth1394_node_info *node_info;
- __be64 guid;
-
- /* Sanity check. MacOSX seems to be sending us 131 in this
- * field (atleast on my Panther G5). Not sure why. */
- if (sspd > 5 || sspd < 0)
- sspd = 0;
-
- maxpayload = min(eth1394_speedto_maxpayload[sspd],
- (u16)(1 << (max_rec + 1)));
-
- guid = get_unaligned(&arp1394->s_uniq_id);
- node = eth1394_find_node_guid(&priv->ip_node_list,
- be64_to_cpu(guid));
- if (!node)
- return cpu_to_be16(0);
-
- node_info = dev_get_drvdata(&node->ud->device);
-
- /* Update our speed/payload/fifo_offset table */
- node_info->maxpayload = maxpayload;
- node_info->sspd = sspd;
- node_info->fifo = fifo_addr;
-
- /* Now that we're done with the 1394 specific stuff, we'll
- * need to alter some of the data. Believe it or not, all
- * that needs to be done is sender_IP_address needs to be
- * moved, the destination hardware address get stuffed
- * in and the hardware address length set to 8.
- *
- * IMPORTANT: The code below overwrites 1394 specific data
- * needed above so keep the munging of the data for the
- * higher level IP stack last. */
-
- arp->ar_hln = 8;
- arp_ptr += arp->ar_hln; /* skip over sender unique id */
- *(u32 *)arp_ptr = arp1394->sip; /* move sender IP addr */
- arp_ptr += arp->ar_pln; /* skip over sender IP addr */
-
- if (arp->ar_op == htons(ARPOP_REQUEST))
- memset(arp_ptr, 0, sizeof(u64));
- else
- memcpy(arp_ptr, dev->dev_addr, sizeof(u64));
- }
-
- /* Now add the ethernet header. */
- if (dev_hard_header(skb, dev, ntohs(ether_type), &dest_hw, NULL,
- skb->len) >= 0)
- ret = ether1394_type_trans(skb, dev);
-
- return ret;
-}
-
-static int fragment_overlap(struct list_head *frag_list, int offset, int len)
-{
- struct fragment_info *fi;
- int end = offset + len;
-
- list_for_each_entry(fi, frag_list, list)
- if (offset < fi->offset + fi->len && end > fi->offset)
- return 1;
-
- return 0;
-}
-
-static struct list_head *find_partial_datagram(struct list_head *pdgl, int dgl)
-{
- struct partial_datagram *pd;
-
- list_for_each_entry(pd, pdgl, list)
- if (pd->dgl == dgl)
- return &pd->list;
-
- return NULL;
-}
-
-/* Assumes that new fragment does not overlap any existing fragments */
-static int new_fragment(struct list_head *frag_info, int offset, int len)
-{
- struct list_head *lh;
- struct fragment_info *fi, *fi2, *new;
-
- list_for_each(lh, frag_info) {
- fi = list_entry(lh, struct fragment_info, list);
- if (fi->offset + fi->len == offset) {
- /* The new fragment can be tacked on to the end */
- fi->len += len;
- /* Did the new fragment plug a hole? */
- fi2 = list_entry(lh->next, struct fragment_info, list);
- if (fi->offset + fi->len == fi2->offset) {
- /* glue fragments together */
- fi->len += fi2->len;
- list_del(lh->next);
- kfree(fi2);
- }
- return 0;
- } else if (offset + len == fi->offset) {
- /* The new fragment can be tacked on to the beginning */
- fi->offset = offset;
- fi->len += len;
- /* Did the new fragment plug a hole? */
- fi2 = list_entry(lh->prev, struct fragment_info, list);
- if (fi2->offset + fi2->len == fi->offset) {
- /* glue fragments together */
- fi2->len += fi->len;
- list_del(lh);
- kfree(fi);
- }
- return 0;
- } else if (offset > fi->offset + fi->len) {
- break;
- } else if (offset + len < fi->offset) {
- lh = lh->prev;
- break;
- }
- }
-
- new = kmalloc(sizeof(*new), GFP_ATOMIC);
- if (!new)
- return -ENOMEM;
-
- new->offset = offset;
- new->len = len;
-
- list_add(&new->list, lh);
- return 0;
-}
-
-static int new_partial_datagram(struct net_device *dev, struct list_head *pdgl,
- int dgl, int dg_size, char *frag_buf,
- int frag_off, int frag_len)
-{
- struct partial_datagram *new;
-
- new = kmalloc(sizeof(*new), GFP_ATOMIC);
- if (!new)
- return -ENOMEM;
-
- INIT_LIST_HEAD(&new->frag_info);
-
- if (new_fragment(&new->frag_info, frag_off, frag_len) < 0) {
- kfree(new);
- return -ENOMEM;
- }
-
- new->dgl = dgl;
- new->dg_size = dg_size;
-
- new->skb = dev_alloc_skb(dg_size + dev->hard_header_len + 15);
- if (!new->skb) {
- struct fragment_info *fi = list_entry(new->frag_info.next,
- struct fragment_info,
- list);
- kfree(fi);
- kfree(new);
- return -ENOMEM;
- }
-
- skb_reserve(new->skb, (dev->hard_header_len + 15) & ~15);
- new->pbuf = skb_put(new->skb, dg_size);
- memcpy(new->pbuf + frag_off, frag_buf, frag_len);
-
- list_add(&new->list, pdgl);
- return 0;
-}
-
-static int update_partial_datagram(struct list_head *pdgl, struct list_head *lh,
- char *frag_buf, int frag_off, int frag_len)
-{
- struct partial_datagram *pd =
- list_entry(lh, struct partial_datagram, list);
-
- if (new_fragment(&pd->frag_info, frag_off, frag_len) < 0)
- return -ENOMEM;
-
- memcpy(pd->pbuf + frag_off, frag_buf, frag_len);
-
- /* Move list entry to beginnig of list so that oldest partial
- * datagrams percolate to the end of the list */
- list_move(lh, pdgl);
- return 0;
-}
-
-static int is_datagram_complete(struct list_head *lh, int dg_size)
-{
- struct partial_datagram *pd;
- struct fragment_info *fi;
-
- pd = list_entry(lh, struct partial_datagram, list);
- fi = list_entry(pd->frag_info.next, struct fragment_info, list);
-
- return (fi->len == dg_size);
-}
-
-/* Packet reception. We convert the IP1394 encapsulation header to an
- * ethernet header, and fill it with some of our other fields. This is
- * an incoming packet from the 1394 bus. */
-static int ether1394_data_handler(struct net_device *dev, int srcid, int destid,
- char *buf, int len)
-{
- struct sk_buff *skb;
- unsigned long flags;
- struct eth1394_priv *priv = netdev_priv(dev);
- union eth1394_hdr *hdr = (union eth1394_hdr *)buf;
- __be16 ether_type = cpu_to_be16(0); /* initialized to clear warning */
- int hdr_len;
- struct unit_directory *ud = priv->ud_list[NODEID_TO_NODE(srcid)];
- struct eth1394_node_info *node_info;
-
- if (!ud) {
- struct eth1394_node_ref *node;
- node = eth1394_find_node_nodeid(&priv->ip_node_list, srcid);
- if (unlikely(!node)) {
- HPSB_PRINT(KERN_ERR, "ether1394 rx: sender nodeid "
- "lookup failure: " NODE_BUS_FMT,
- NODE_BUS_ARGS(priv->host, srcid));
- dev->stats.rx_dropped++;
- return -1;
- }
- ud = node->ud;
-
- priv->ud_list[NODEID_TO_NODE(srcid)] = ud;
- }
-
- node_info = dev_get_drvdata(&ud->device);
-
- /* First, did we receive a fragmented or unfragmented datagram? */
- hdr->words.word1 = ntohs(hdr->words.word1);
-
- hdr_len = hdr_type_len[hdr->common.lf];
-
- if (hdr->common.lf == ETH1394_HDR_LF_UF) {
- /* An unfragmented datagram has been received by the ieee1394
- * bus. Build an skbuff around it so we can pass it to the
- * high level network layer. */
-
- skb = dev_alloc_skb(len + dev->hard_header_len + 15);
- if (unlikely(!skb)) {
- ETH1394_PRINT_G(KERN_ERR, "Out of memory\n");
- dev->stats.rx_dropped++;
- return -1;
- }
- skb_reserve(skb, (dev->hard_header_len + 15) & ~15);
- memcpy(skb_put(skb, len - hdr_len), buf + hdr_len,
- len - hdr_len);
- ether_type = hdr->uf.ether_type;
- } else {
- /* A datagram fragment has been received, now the fun begins. */
-
- struct list_head *pdgl, *lh;
- struct partial_datagram *pd;
- int fg_off;
- int fg_len = len - hdr_len;
- int dg_size;
- int dgl;
- int retval;
- struct pdg_list *pdg = &(node_info->pdg);
-
- hdr->words.word3 = ntohs(hdr->words.word3);
- /* The 4th header word is reserved so no need to do ntohs() */
-
- if (hdr->common.lf == ETH1394_HDR_LF_FF) {
- ether_type = hdr->ff.ether_type;
- dgl = hdr->ff.dgl;
- dg_size = hdr->ff.dg_size + 1;
- fg_off = 0;
- } else {
- hdr->words.word2 = ntohs(hdr->words.word2);
- dgl = hdr->sf.dgl;
- dg_size = hdr->sf.dg_size + 1;
- fg_off = hdr->sf.fg_off;
- }
- spin_lock_irqsave(&pdg->lock, flags);
-
- pdgl = &(pdg->list);
- lh = find_partial_datagram(pdgl, dgl);
-
- if (lh == NULL) {
- while (pdg->sz >= max_partial_datagrams) {
- /* remove the oldest */
- purge_partial_datagram(pdgl->prev);
- pdg->sz--;
- }
-
- retval = new_partial_datagram(dev, pdgl, dgl, dg_size,
- buf + hdr_len, fg_off,
- fg_len);
- if (retval < 0) {
- spin_unlock_irqrestore(&pdg->lock, flags);
- goto bad_proto;
- }
- pdg->sz++;
- lh = find_partial_datagram(pdgl, dgl);
- } else {
- pd = list_entry(lh, struct partial_datagram, list);
-
- if (fragment_overlap(&pd->frag_info, fg_off, fg_len)) {
- /* Overlapping fragments, obliterate old
- * datagram and start new one. */
- purge_partial_datagram(lh);
- retval = new_partial_datagram(dev, pdgl, dgl,
- dg_size,
- buf + hdr_len,
- fg_off, fg_len);
- if (retval < 0) {
- pdg->sz--;
- 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) {
- dev->stats.rx_errors++;
- dev->stats.rx_dropped++;
- dev_kfree_skb_any(skb);
- } else if (netif_rx(skb) == NET_RX_DROP) {
- dev->stats.rx_errors++;
- dev->stats.rx_dropped++;
- } else {
- dev->stats.rx_packets++;
- dev->stats.rx_bytes += skb->len;
- }
-
- spin_unlock_irqrestore(&priv->lock, flags);
-
-bad_proto:
- if (netif_queue_stopped(dev))
- netif_wake_queue(dev);
-
- 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(&eth1394_highlevel, host);
- if (unlikely(!hi)) {
- ETH1394_PRINT_G(KERN_ERR, "No net device at fw-host%d\n",
- host->id);
- 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)
-{
- __be32 *data;
- char *buf;
- struct eth1394_host_info *hi;
- struct net_device *dev;
- unsigned int len;
- u32 specifier_id;
- u16 source_id;
- int i;
- int nready;
-
- hi = hpsb_get_hostinfo(&eth1394_highlevel, iso->host);
- if (unlikely(!hi)) {
- ETH1394_PRINT_G(KERN_ERR, "No net device at fw-host%d\n",
- iso->host->id);
- 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 = (__be32 *)(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;
-
- 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);
-
-}
-
-/******************************************
- * 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 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;
-
- 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);
-}
-
-/* We need to encapsulate the standard header with our own. We use the
- * ethernet header's proto for our own. */
-static unsigned int ether1394_encapsulate_prep(unsigned int max_payload,
- __be16 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 DIV_ROUND_UP(dg_size, adj_max_payload);
-}
-
-static 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 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 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;
-
- if (hpsb_get_tlabel(p))
- return -EAGAIN;
-
- p->tcode = TCODE_WRITEB;
- p->header_size = 16;
- p->expect_response = 1;
- p->header[0] =
- p->node_id << 16 | p->tlabel << 10 | 1 << 8 | TCODE_WRITEB << 4;
- p->header[1] = host->node_id << 16 | addr >> 32;
- p->header[2] = addr & 0xffffffff;
- p->header[3] = tx_len << 16;
- p->data_size = (tx_len + 3) & ~3;
- p->data = data;
-
- return 0;
-}
-
-static 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] = cpu_to_be32(ETHER1394_GASP_SPECIFIER_ID_LO << 24 |
- ETHER1394_GASP_VERSION);
-
- p->speed_code = priv->bc_sspd;
-
- /* prevent hpsb_send_packet() from overriding our speed code */
- p->node_id = LOCAL_BUS | ALL_NODES;
-}
-
-static 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 -ENOMEM;
-
- 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 -EAGAIN;
- }
-
- 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 -EIO;
- }
-
- return 0;
-}
-
-/* Task function to be run when a datagram transmission is completed */
-static 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) {
- dev->stats.tx_dropped++;
- dev->stats.tx_errors++;
- } else {
- dev->stats.tx_bytes += skb->len;
- dev->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, err;
-
- /* Add the encapsulation header to the fragment */
- tx_len = ether1394_encapsulate(ptask->skb, ptask->max_payload,
- &ptask->hdr);
- err = ether1394_send_packet(ptask, tx_len);
- if (err) {
- if (err == -EAGAIN)
- ETH1394_PRINT_G(KERN_ERR, "Out of tlabels\n");
-
- ether1394_dg_complete(ptask, 1);
- }
- } else {
- ether1394_dg_complete(ptask, fail);
- }
-}
-
-/* Transmit a packet (called by kernel) */
-static netdev_tx_t ether1394_tx(struct sk_buff *skb,
- struct net_device *dev)
-{
- struct eth1394hdr hdr_buf;
- struct eth1394_priv *priv = netdev_priv(dev);
- __be16 proto;
- unsigned long flags;
- nodeid_t dest_node;
- eth1394_tx_type tx_type;
- 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, GFP_ATOMIC);
- if (ptask == NULL)
- 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)
- goto fail;
-#endif
-
- skb = skb_share_check(skb, GFP_ATOMIC);
- if (!skb)
- goto fail;
-
- /* Get rid of the fake eth1394 header, but first make a copy.
- * We might need to rebuild the header on tx failure. */
- memcpy(&hdr_buf, skb->data, sizeof(hdr_buf));
- skb_pull(skb, ETH1394_HLEN);
-
- proto = hdr_buf.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(hdr_buf.h_dest, dev->broadcast, ETH1394_ALEN) == 0 ||
- proto == htons(ETH_P_ARP) ||
- (proto == htons(ETH_P_IP) &&
- IN_MULTICAST(ntohl(ip_hdr(skb)->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 {
- __be64 guid = get_unaligned((__be64 *)hdr_buf.h_dest);
-
- node = eth1394_find_node_guid(&priv->ip_node_list,
- be64_to_cpu(guid));
- if (!node)
- goto fail;
-
- node_info = dev_get_drvdata(&node->ud->device);
- if (node_info->fifo == CSR1212_INVALID_ADDR_SPACE)
- 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 == 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)) {
- if (dest_node == (LOCAL_BUS | ALL_NODES))
- goto fail;
-
- /* At this point we want to restore the packet. When we return
- * here with NETDEV_TX_BUSY we will get another entrance in this
- * routine with the same skb and we need it to look the same.
- * So we pull 4 more bytes, then build the header again. */
- skb_pull(skb, 4);
- ether1394_header(skb, dev, ntohs(hdr_buf.h_proto),
- hdr_buf.h_dest, NULL, 0);
-
- /* Most failures of ether1394_send_packet are recoverable. */
- netif_stop_queue(dev);
- priv->wake_node = dest_node;
- schedule_work(&priv->wake);
- kmem_cache_free(packet_task_cache, ptask);
- return NETDEV_TX_BUSY;
- }
-
- return NETDEV_TX_OK;
-fail:
- if (ptask)
- kmem_cache_free(packet_task_cache, ptask);
-
- if (skb != NULL)
- dev_kfree_skb(skb);
-
- spin_lock_irqsave(&priv->lock, flags);
- dev->stats.tx_dropped++;
- dev->stats.tx_errors++;
- spin_unlock_irqrestore(&priv->lock, flags);
-
- return NETDEV_TX_OK;
-}
-
-static int __init ether1394_init_module(void)
-{
- int err;
-
- packet_task_cache = kmem_cache_create("packet_task",
- sizeof(struct packet_task),
- 0, 0, NULL);
- if (!packet_task_cache)
- return -ENOMEM;
-
- hpsb_register_highlevel(&eth1394_highlevel);
- err = hpsb_register_protocol(&eth1394_proto_driver);
- if (err) {
- hpsb_unregister_highlevel(&eth1394_highlevel);
- kmem_cache_destroy(packet_task_cache);
- }
- return err;
-}
-
-static void __exit ether1394_exit_module(void)
-{
- hpsb_unregister_protocol(&eth1394_proto_driver);
- hpsb_unregister_highlevel(&eth1394_highlevel);
- kmem_cache_destroy(packet_task_cache);
-}
-
-module_init(ether1394_init_module);
-module_exit(ether1394_exit_module);