eth1394.c
上传用户:jlfgdled
上传日期:2013-04-10
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文件大小:21k
- /*
- * eth1394.c -- Ethernet driver for Linux IEEE-1394 Subsystem
- *
- * Copyright (C) 2001 Ben Collins <bcollins@debian.org>
- * 2000 Bonin Franck <boninf@free.fr>
- *
- * 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.
- */
- /* State of this driver:
- *
- * 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. A few issues are:
- *
- * - Does not support send/recv over Async streams using GASP
- * packet formats, as per the RFC for ARP requests.
- * - Does not yet support fragmented packets.
- * - Relies on hardware address being equal to the nodeid for some things.
- * - Does not support multicast
- * - Hardcoded address for sending packets, instead of using discovery
- * (ARP, see first item)
- */
- #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/tcp.h>
- #include <linux/skbuff.h>
- #include <asm/delay.h>
- #include <asm/semaphore.h>
- #include <asm/bitops.h>
- #include <net/arp.h>
- #include "ieee1394_types.h"
- #include "ieee1394_core.h"
- #include "ieee1394_transactions.h"
- #include "ieee1394.h"
- #include "highlevel.h"
- #include "eth1394.h"
- #define ETH1394_PRINT_G(level, fmt, args...)
- printk(level ETHER1394_DRIVER_NAME": "fmt, ## args)
- #define ETH1394_PRINT(level, dev_name, fmt, args...)
- printk(level ETHER1394_DRIVER_NAME": %s: " fmt, dev_name, ## args)
- #define DEBUG(fmt, args...)
- printk(KERN_ERR fmt, ## args)
- static char version[] __devinitdata =
- "$Rev: 546 $ Ben Collins <bcollins@debian.org>";
- /* Our ieee1394 highlevel driver */
- #define ETHER1394_DRIVER_NAME "ether1394"
- static kmem_cache_t *packet_task_cache;
- static struct hpsb_highlevel *hl_handle = NULL;
- /* Card handling */
- static LIST_HEAD (host_info_list);
- static spinlock_t host_info_lock = SPIN_LOCK_UNLOCKED;
- /* Use common.lf to determine header len */
- static int hdr_type_len[] = {
- sizeof (struct eth1394_uf_hdr),
- sizeof (struct eth1394_ff_hdr),
- sizeof (struct eth1394_sf_hdr),
- sizeof (struct eth1394_sf_hdr)
- };
- MODULE_AUTHOR("Ben Collins (bcollins@debian.org)");
- MODULE_DESCRIPTION("IEEE 1394 IPv4 Driver (IPv4-over-1394 as per RFC 2734)");
- MODULE_LICENSE("GPL");
- /* Find our host_info struct for a given host pointer. Must be called
- * under spinlock. */
- static inline struct host_info *find_host_info (struct hpsb_host *host)
- {
- struct list_head *lh;
- struct host_info *hi;
- lh = host_info_list.next;
- while (lh != &host_info_list) {
- hi = list_entry (lh, struct host_info, list);
- if (hi->host == host)
- return hi;
- lh = lh->next;
- }
- return NULL;
- }
- /* Find the network device for our host */
- static inline struct net_device *ether1394_find_dev (struct hpsb_host *host)
- {
- struct host_info *hi;
- spin_lock_irq (&host_info_lock);
- hi = find_host_info (host);
- spin_unlock_irq (&host_info_lock);
- if (hi == NULL)
- return NULL;
- return hi->dev;
- }
- /* This is called after an "ifup" */
- static int ether1394_open (struct net_device *dev)
- {
- struct eth1394_priv *priv = (struct eth1394_priv *)dev->priv;
- /* Set the spinlock before grabbing IRQ! */
- priv->lock = SPIN_LOCK_UNLOCKED;
- 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 *)dev->priv)->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 %sn",
- ((struct eth1394_priv *)(dev->priv))->host->driver->name);
- highlevel_host_reset (((struct eth1394_priv *)(dev->priv))->host);
- netif_wake_queue (dev);
- }
- /* We need to encapsulate the standard header with our own. We use the
- * ethernet header's proto for our own.
- *
- * XXX: This is where we need to create a list of skb's for fragmented
- * packets. */
- static inline void ether1394_encapsulate (struct sk_buff *skb, struct net_device *dev,
- int proto)
- {
- union eth1394_hdr *hdr =
- (union eth1394_hdr *)skb_push (skb, hdr_type_len[ETH1394_HDR_LF_UF]);
- hdr->common.lf = ETH1394_HDR_LF_UF;
- hdr->words.word1 = htons(hdr->words.word1);
- hdr->uf.ether_type = proto;
- return;
- }
- /* 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. */
- static inline void ether1394_arp_to_1394arp (struct sk_buff *skb, struct net_device *dev)
- {
- struct eth1394_priv *priv =
- (struct eth1394_priv *)(dev->priv);
- u16 phy_id = priv->host->node_id & NODE_MASK;
- unsigned char *arp_ptr = (unsigned char *)skb->data;
- struct eth1394_arp *arp1394 = (struct eth1394_arp *)skb->data;
- unsigned char arp_data[2*(dev->addr_len+4)];
- /* Copy the main data that we need */
- arp_ptr = memcpy (arp_data, arp_ptr + sizeof(struct arphdr), sizeof (arp_data));
- /* Extend the buffer enough for our new header */
- skb_put (skb, sizeof (struct eth1394_arp) -
- (sizeof (arp_data) + sizeof (struct arphdr)));
- #define PROCESS_MEMBER(ptr,val,len)
- memcpy (val, ptr, len); ptr += len
- arp_ptr += arp1394->hw_addr_len;
- PROCESS_MEMBER (arp_ptr, &arp1394->sip, arp1394->ip_addr_len);
- arp_ptr += arp1394->hw_addr_len;
- PROCESS_MEMBER (arp_ptr, &arp1394->tip, arp1394->ip_addr_len);
- #undef PROCESS_MEMBER
- /* Now add our own flavor of arp header fields to the orig one */
- arp1394->hw_addr_len = IP1394_HW_ADDR_LEN;
- arp1394->hw_type = __constant_htons (ARPHRD_IEEE1394);
- arp1394->s_uniq_id = cpu_to_le64 (priv->eui[phy_id]);
- arp1394->max_rec = priv->max_rec[phy_id];
- arp1394->sspd = priv->sspd[phy_id];
- arp1394->fifo_hi = htons (priv->fifo_hi[phy_id]);
- arp1394->fifo_lo = htonl (priv->fifo_lo[phy_id]);
- return;
- }
- static int ether1394_change_mtu(struct net_device *dev, int new_mtu)
- {
- if ((new_mtu < 68) || (new_mtu > ETHER1394_REGION_ADDR_LEN))
- return -EINVAL;
- dev->mtu = new_mtu;
- return 0;
- }
- static inline void ether1394_register_limits (int nodeid, unsigned char max_rec,
- unsigned char sspd, u64 eui, u16 fifo_hi,
- u32 fifo_lo, struct eth1394_priv *priv)
- {
- int i;
- if (nodeid < 0 || nodeid >= ALL_NODES) {
- ETH1394_PRINT_G (KERN_ERR, "Cannot register invalid nodeid %dn", nodeid);
- return;
- }
- priv->max_rec[nodeid] = max_rec;
- priv->sspd[nodeid] = sspd;
- priv->fifo_hi[nodeid] = fifo_hi;
- priv->fifo_lo[nodeid] = fifo_lo;
- priv->eui[nodeid] = eui;
- /* 63 is used for broadcasts to all hosts. It is equal to the
- * minimum of all registered nodes. A registered node is one with
- * a nonzero offset. Set the values rediculously high to start. We
- * know we have atleast one to change the default to. */
- sspd = 0xff;
- max_rec = 0xff;
- for (i = 0; i < ALL_NODES; i++) {
- if (!priv->fifo_hi && !priv->fifo_lo) continue; /* Unregistered */
- if (priv->max_rec[i] < max_rec) max_rec = priv->max_rec[i];
- if (priv->sspd[i] < sspd) sspd = priv->sspd[i];
- }
- priv->max_rec[ALL_NODES] = max_rec;
- priv->sspd[ALL_NODES] = sspd;
- return;
- }
- static void ether1394_reset_priv (struct net_device *dev, int set_mtu)
- {
- unsigned long flags;
- struct eth1394_priv *priv = (struct eth1394_priv *)dev->priv;
- int phy_id = priv->host->node_id & NODE_MASK;
- spin_lock_irqsave (&priv->lock, flags);
- /* Clear the speed/payload/offset tables */
- memset (priv->max_rec, 0, sizeof (priv->max_rec));
- memset (priv->sspd, 0, sizeof (priv->sspd));
- memset (priv->fifo_hi, 0, sizeof (priv->fifo_hi));
- memset (priv->fifo_lo, 0, sizeof (priv->fifo_lo));
- /* Register our limits now */
- ether1394_register_limits (phy_id, (be32_to_cpu(priv->host->csr.rom[2]) >> 12) & 0xf,
- priv->host->speed_map[(phy_id << 6) + phy_id],
- (u64)(((u64)be32_to_cpu(priv->host->csr.rom[3]) << 32) |
- be32_to_cpu(priv->host->csr.rom[4])),
- ETHER1394_REGION_ADDR >> 32,
- ETHER1394_REGION_ADDR & 0xffffffff, priv);
- /* We'll use our max_rec as the default mtu */
- if (set_mtu)
- dev->mtu = (1 << (priv->max_rec[phy_id] + 1)) - sizeof (union eth1394_hdr);
- /* Set our hardware address while we're at it */
- *(nodeid_t *)dev->dev_addr = htons (priv->host->node_id);
- spin_unlock_irqrestore (&priv->lock, flags);
- }
- static int ether1394_tx (struct sk_buff *skb, struct net_device *dev);
- /* This function is called by register_netdev */
- static int 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;
- /* Some constants */
- dev->watchdog_timeo = ETHER1394_TIMEOUT;
- dev->flags = IFF_BROADCAST; /* TODO: Support MCAP */
- dev->features = NETIF_F_NO_CSUM|NETIF_F_SG|NETIF_F_HIGHDMA|NETIF_F_FRAGLIST;
- dev->addr_len = 2;
- ether1394_reset_priv (dev, 1);
- return 0;
- }
- /*
- * 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 host_info *hi = NULL;
- struct net_device *dev = NULL;
- struct eth1394_priv *priv;
- static int version_printed = 0;
- if (version_printed++ == 0)
- ETH1394_PRINT_G (KERN_INFO, "%sn", version);
- dev = alloc_etherdev(sizeof (struct eth1394_priv));
- if (dev == NULL)
- goto out;
- SET_MODULE_OWNER(dev);
- dev->init = ether1394_init_dev;
- priv = (struct eth1394_priv *)dev->priv;
- priv->host = host;
- hi = (struct host_info *)kmalloc (sizeof (struct host_info),
- GFP_KERNEL);
- if (hi == NULL)
- goto out;
- if (register_netdev (dev)) {
- ETH1394_PRINT (KERN_ERR, dev->name, "Error registering network drivern");
- kfree (dev);
- return;
- }
- ETH1394_PRINT (KERN_ERR, dev->name, "IEEE-1394 IPv4 over 1394 Ethernet (%s)n",
- host->driver->name);
- INIT_LIST_HEAD (&hi->list);
- hi->host = host;
- hi->dev = dev;
- spin_lock_irq (&host_info_lock);
- list_add_tail (&hi->list, &host_info_list);
- spin_unlock_irq (&host_info_lock);
- return;
- out:
- if (dev != NULL)
- kfree (dev);
- ETH1394_PRINT_G (KERN_ERR, "Out of memoryn");
- return;
- }
- /* Remove a card from our list */
- static void ether1394_remove_host (struct hpsb_host *host)
- {
- struct host_info *hi;
- spin_lock_irq (&host_info_lock);
- hi = find_host_info (host);
- if (hi != NULL) {
- unregister_netdev (hi->dev);
- kfree (hi->dev);
- list_del (&hi->list);
- kfree (hi);
- }
- spin_unlock_irq (&host_info_lock);
- return;
- }
- /* A reset has just arisen */
- static void ether1394_host_reset (struct hpsb_host *host)
- {
- struct net_device *dev = ether1394_find_dev(host);
- /* This can happen for hosts that we don't use */
- if (dev == NULL)
- return;
- /* Reset our private host data, but not our mtu */
- netif_stop_queue (dev);
- ether1394_reset_priv (dev, 0);
- netif_wake_queue (dev);
- }
- /* Copied from net/ethernet/eth.c */
- static inline unsigned short ether1394_type_trans(struct sk_buff *skb, struct net_device *dev)
- {
- struct ethhdr *eth;
- unsigned char *rawp;
- skb->mac.raw = skb->data;
- skb_pull (skb, ETH_HLEN);
- eth = skb->mac.ethernet;
- #if 0
- if(*eth->h_dest & 1) {
- if(memcmp(eth->h_dest, dev->broadcast, dev->addr_len)==0)
- skb->pkt_type = PACKET_BROADCAST;
- else
- skb->pkt_type = PACKET_MULTICAST;
- } else {
- if(memcmp(eth->h_dest, dev->dev_addr, dev->addr_len))
- skb->pkt_type = PACKET_OTHERHOST;
- }
- #endif
- 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 unsigned short ether1394_parse_encap (struct sk_buff *skb, struct net_device *dev,
- nodeid_t srcid, nodeid_t destid)
- {
- union eth1394_hdr *hdr = (union eth1394_hdr *)skb->data;
- unsigned char src_hw[ETH_ALEN], dest_hw[ETH_ALEN];
- unsigned short ret = 0;
- /* Setup our hw addresses. We use these to build the
- * ethernet header. */
- *(u16 *)dest_hw = htons(destid);
- *(u16 *)src_hw = htons(srcid);
- /* Remove the encapsulation header */
- hdr->words.word1 = ntohs(hdr->words.word1);
- skb_pull (skb, hdr_type_len[hdr->common.lf]);
- /* 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 (hdr->uf.ether_type == __constant_htons (ETH_P_ARP)) {
- unsigned long flags;
- u16 phy_id = srcid & NODE_MASK;
- struct eth1394_priv *priv =
- (struct eth1394_priv *)dev->priv;
- struct eth1394_arp arp1394;
- struct arphdr *arp = (struct arphdr *)skb->data;
- unsigned char *arp_ptr = (unsigned char *)(arp + 1);
- memcpy (&arp1394, arp, sizeof (struct eth1394_arp));
- /* Update our speed/payload/fifo_offset table */
- spin_lock_irqsave (&priv->lock, flags);
- ether1394_register_limits (phy_id, arp1394.max_rec, arp1394.sspd,
- le64_to_cpu (arp1394.s_uniq_id),
- ntohs (arp1394.fifo_hi),
- ntohl (arp1394.fifo_lo), priv);
- spin_unlock_irqrestore (&priv->lock, flags);
- #define PROCESS_MEMBER(ptr,val,len)
- ptr = memcpy (ptr, val, len) + len
- PROCESS_MEMBER (arp_ptr, src_hw, dev->addr_len);
- PROCESS_MEMBER (arp_ptr, &arp1394.sip, 4);
- PROCESS_MEMBER (arp_ptr, dest_hw, dev->addr_len);
- PROCESS_MEMBER (arp_ptr, &arp1394.tip, 4);
- #undef PROCESS_MEMBER
- arp->ar_hln = dev->addr_len;
- arp->ar_hrd = __constant_htons (ARPHRD_ETHER);
- skb_trim (skb, sizeof (struct arphdr) + 2*(dev->addr_len+4));
- }
- /* Now add the ethernet header. */
- if (dev->hard_header (skb, dev, __constant_ntohs (hdr->uf.ether_type),
- dest_hw, src_hw, skb->len) >= 0)
- ret = ether1394_type_trans(skb, dev);
- return ret;
- }
- /* 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_write (struct hpsb_host *host, int srcid, int destid,
- quadlet_t *data, u64 addr, unsigned int len)
- {
- struct sk_buff *skb;
- char *buf = (char *)data;
- unsigned long flags;
- struct net_device *dev = ether1394_find_dev (host);
- struct eth1394_priv *priv;
- if (dev == NULL) {
- ETH1394_PRINT_G (KERN_ERR, "Could not find net device for host %pn",
- host);
- return RCODE_ADDRESS_ERROR;
- }
- priv = (struct eth1394_priv *)dev->priv;
- /* A packet 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 memn");
- priv->stats.rx_dropped++;
- return RCODE_ADDRESS_ERROR;
- }
- skb_reserve(skb, (dev->hard_header_len + 15) & ~15);
- memcpy (skb_put (skb, len), buf, len);
- /* 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);
- 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;
- }
- netif_stop_queue(dev);
- 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:
- netif_start_queue(dev);
- spin_unlock_irqrestore (&priv->lock, flags);
- dev->last_rx = jiffies;
- return RCODE_COMPLETE;
- }
- /* This function is our scheduled write */
- static void hpsb_write_sched (void *__ptask)
- {
- struct packet_task *ptask = (struct packet_task *)__ptask;
- struct sk_buff *skb = ptask->skb;
- struct net_device *dev = ptask->skb->dev;
- struct eth1394_priv *priv = (struct eth1394_priv *)dev->priv;
- unsigned long flags;
- /* Statistics */
- spin_lock_irqsave (&priv->lock, flags);
- if (!hpsb_write(priv->host, ptask->dest_node,
- get_hpsb_generation(priv->host),
- ptask->addr, (quadlet_t *)skb->data, skb->len)) {
- priv->stats.tx_bytes += skb->len;
- priv->stats.tx_packets++;
- } else {
- //printk("Failed in hpsb_write_schedn");
- priv->stats.tx_dropped++;
- priv->stats.tx_errors++;
- if (netif_queue_stopped (dev))
- netif_wake_queue (dev);
- }
- spin_unlock_irqrestore (&priv->lock, flags);
- dev->trans_start = jiffies;
- dev_kfree_skb(skb);
- kmem_cache_free(packet_task_cache, ptask);
- return;
- }
- /* 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 ethhdr *eth;
- struct eth1394_priv *priv = (struct eth1394_priv *)dev->priv;
- int proto;
- unsigned long flags;
- nodeid_t dest_node;
- u64 addr;
- struct packet_task *ptask = NULL;
- int ret = 0;
- if ((skb = skb_share_check (skb, kmflags)) == NULL) {
- ret = -ENOMEM;
- goto fail;
- }
- /* Get rid of the ethernet header, but save a pointer */
- eth = (struct ethhdr *)skb->data;
- skb_pull (skb, ETH_HLEN);
- /* Save the destination id, and proto for our encapsulation, then
- * toss the ethernet header aside like the cheap whore it is. */
- dest_node = ntohs (*(nodeid_t *)(eth->h_dest));
- proto = eth->h_proto;
- /* If this is an ARP packet, convert it */
- if (proto == __constant_htons (ETH_P_ARP))
- ether1394_arp_to_1394arp (skb, dev);
- /* Now add our encapsulation header */
- ether1394_encapsulate (skb, dev, proto);
- /* TODO: The above encapsulate function needs to recognize when a
- * packet needs to be split for a specified node. It should create
- * a list of skb's that we could then iterate over for the below
- * call to schedule our writes. */
- /* XXX: Right now we accept that we don't exactly follow RFC. When
- * we do, we will send ARP requests via GASP format, and so we wont
- * need this hack. */
- spin_lock_irqsave (&priv->lock, flags);
- addr = (u64)priv->fifo_hi[dest_node & NODE_MASK] << 32 |
- priv->fifo_lo[dest_node & NODE_MASK];
- spin_unlock_irqrestore (&priv->lock, flags);
- if (!addr)
- addr = ETHER1394_REGION_ADDR;
- ptask = kmem_cache_alloc(packet_task_cache, kmflags);
- if (ptask == NULL) {
- ret = -ENOMEM;
- goto fail;
- }
- ptask->skb = skb;
- ptask->addr = addr;
- ptask->dest_node = dest_node;
- INIT_TQUEUE(&ptask->tq, hpsb_write_sched, ptask);
- schedule_task(&ptask->tq);
- return 0;
- fail:
- printk("Failed in ether1394_txn");
- if (skb != NULL)
- dev_kfree_skb (skb);
- spin_lock_irqsave (&priv->lock, flags);
- priv->stats.tx_dropped++;
- priv->stats.tx_errors++;
- if (netif_queue_stopped (dev))
- netif_wake_queue (dev);
- spin_unlock_irqrestore (&priv->lock, flags);
- return ret;
- }
- /* Function for incoming 1394 packets */
- static struct hpsb_address_ops addr_ops = {
- .write = ether1394_write,
- };
- /* Ieee1394 highlevel driver functions */
- static struct hpsb_highlevel_ops hl_ops = {
- .add_host = ether1394_add_host,
- .remove_host = ether1394_remove_host,
- .host_reset = ether1394_host_reset,
- };
- 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 */
- hl_handle = hpsb_register_highlevel (ETHER1394_DRIVER_NAME, &hl_ops);
- if (hl_handle == NULL) {
- ETH1394_PRINT_G (KERN_ERR, "No more memory for drivern");
- return -ENOMEM;
- }
- hpsb_register_addrspace (hl_handle, &addr_ops, ETHER1394_REGION_ADDR,
- ETHER1394_REGION_ADDR_END);
- return 0;
- }
- static void __exit ether1394_exit_module (void)
- {
- hpsb_unregister_highlevel (hl_handle);
- kmem_cache_destroy(packet_task_cache);
- }
- module_init(ether1394_init_module);
- module_exit(ether1394_exit_module);