| /* |
| * eth1394.c -- IPv4 driver for Linux IEEE-1394 Subsystem |
| * |
| * Copyright (C) 2001-2003 Ben Collins <bcollins@debian.org> |
| * 2000 Bonin Franck <boninf@free.fr> |
| * 2003 Steve Kinneberg <kinnebergsteve@acmsystems.com> |
| * |
| * Mainly based on work by Emanuel Pirker and Andreas E. Bombe |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software Foundation, |
| * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| */ |
| |
| /* |
| * This driver intends to support RFC 2734, which describes a method for |
| * transporting IPv4 datagrams over IEEE-1394 serial busses. |
| * |
| * TODO: |
| * RFC 2734 related: |
| * - Add MCAP. Limited Multicast exists only to 224.0.0.1 and 224.0.0.2. |
| * |
| * Non-RFC 2734 related: |
| * - Handle fragmented skb's coming from the networking layer. |
| * - Move generic GASP reception to core 1394 code |
| * - Convert kmalloc/kfree for link fragments to use kmem_cache_* instead |
| * - Stability improvements |
| * - Performance enhancements |
| * - Consider garbage collecting old partial datagrams after X amount of time |
| */ |
| |
| #include <linux/module.h> |
| |
| #include <linux/kernel.h> |
| #include <linux/slab.h> |
| #include <linux/errno.h> |
| #include <linux/types.h> |
| #include <linux/delay.h> |
| #include <linux/init.h> |
| #include <linux/workqueue.h> |
| |
| #include <linux/netdevice.h> |
| #include <linux/inetdevice.h> |
| #include <linux/if_arp.h> |
| #include <linux/if_ether.h> |
| #include <linux/ip.h> |
| #include <linux/in.h> |
| #include <linux/tcp.h> |
| #include <linux/skbuff.h> |
| #include <linux/bitops.h> |
| #include <linux/ethtool.h> |
| #include <asm/uaccess.h> |
| #include <asm/delay.h> |
| #include <asm/unaligned.h> |
| #include <net/arp.h> |
| |
| #include "config_roms.h" |
| #include "csr1212.h" |
| #include "eth1394.h" |
| #include "highlevel.h" |
| #include "ieee1394.h" |
| #include "ieee1394_core.h" |
| #include "ieee1394_hotplug.h" |
| #include "ieee1394_transactions.h" |
| #include "ieee1394_types.h" |
| #include "iso.h" |
| #include "nodemgr.h" |
| |
| #define ETH1394_PRINT_G(level, fmt, args...) \ |
| printk(level "%s: " fmt, driver_name, ## args) |
| |
| #define ETH1394_PRINT(level, dev_name, fmt, args...) \ |
| printk(level "%s: %s: " fmt, driver_name, dev_name, ## args) |
| |
| struct fragment_info { |
| struct list_head list; |
| int offset; |
| int len; |
| }; |
| |
| struct partial_datagram { |
| struct list_head list; |
| u16 dgl; |
| u16 dg_size; |
| 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 */ |
| }; |
| |
| 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, 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_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, |
| }; |
| |
| 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; |
| } |
| |
| /* Return statistics to the caller */ |
| static struct net_device_stats *ether1394_stats(struct net_device *dev) |
| { |
| return &(((struct eth1394_priv *)netdev_priv(dev))->stats); |
| } |
| |
| /* 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; |
| |
| 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_probe(struct device *dev) |
| { |
| struct unit_directory *ud; |
| struct eth1394_host_info *hi; |
| |
| ud = container_of(dev, struct unit_directory, device); |
| hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host); |
| if (!hi) |
| return -ENOENT; |
| |
| return eth1394_new_node(hi, ud); |
| } |
| |
| static int eth1394_remove(struct device *dev) |
| { |
| struct unit_directory *ud; |
| struct eth1394_host_info *hi; |
| struct eth1394_priv *priv; |
| struct eth1394_node_ref *old_node; |
| struct eth1394_node_info *node_info; |
| struct list_head *lh, *n; |
| unsigned long flags; |
| |
| ud = container_of(dev, struct unit_directory, device); |
| hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host); |
| if (!hi) |
| return -ENOENT; |
| |
| priv = netdev_priv(hi->dev); |
| |
| old_node = eth1394_find_node(&priv->ip_node_list, ud); |
| if (!old_node) |
| return 0; |
| |
| list_del(&old_node->list); |
| kfree(old_node); |
| |
| node_info = (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; |
| |
| hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host); |
| if (!hi) |
| return -ENOENT; |
| |
| priv = netdev_priv(hi->dev); |
| node = eth1394_find_node(&priv->ip_node_list, ud); |
| if (node) |
| return 0; |
| |
| return eth1394_new_node(hi, ud); |
| } |
| |
| static 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 void ether1394_init_dev(struct net_device *dev) |
| { |
| 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; |
| |
| SET_ETHTOOL_OPS(dev, ðtool_ops); |
| |
| dev->watchdog_timeo = ETHER1394_TIMEOUT; |
| dev->flags = IFF_BROADCAST | IFF_MULTICAST; |
| dev->features = NETIF_F_HIGHDMA; |
| dev->addr_len = ETH1394_ALEN; |
| dev->hard_header_len = ETH1394_HLEN; |
| dev->type = ARPHRD_IEEE1394; |
| |
| /* FIXME: This value was copied from ether_setup(). Is it too much? */ |
| dev->tx_queue_len = 1000; |
| } |
| |
| /* |
| * Wake the queue up after commonly encountered transmit failure conditions are |
| * hopefully over. Currently only tlabel exhaustion is accounted for. |
| */ |
| static void ether1394_wake_queue(struct work_struct *work) |
| { |
| struct eth1394_priv *priv; |
| struct hpsb_packet *packet; |
| |
| priv = container_of(work, struct eth1394_priv, wake); |
| packet = hpsb_alloc_packet(0); |
| |
| /* This is really bad, but unjam the queue anyway. */ |
| if (!packet) |
| goto out; |
| |
| packet->host = priv->host; |
| packet->node_id = priv->wake_node; |
| /* |
| * A transaction label is all we really want. If we get one, it almost |
| * always means we can get a lot more because the ieee1394 core recycled |
| * a whole batch of tlabels, at last. |
| */ |
| if (hpsb_get_tlabel(packet) == 0) |
| hpsb_free_tlabel(packet); |
| |
| hpsb_free_packet(packet); |
| out: |
| netif_wake_queue(priv->wake_dev); |
| } |
| |
| /* |
| * This function is called every time a card is found. It is generally called |
| * when the module is installed. This is where we add all of our ethernet |
| * devices. One for each host. |
| */ |
| static void ether1394_add_host(struct hpsb_host *host) |
| { |
| struct eth1394_host_info *hi = NULL; |
| struct net_device *dev = NULL; |
| struct eth1394_priv *priv; |
| u64 fifo_addr; |
| |
| if (hpsb_config_rom_ip1394_add(host) != 0) { |
| ETH1394_PRINT_G(KERN_ERR, "Can't add IP-over-1394 ROM entry\n"); |
| return; |
| } |
| |
| fifo_addr = hpsb_allocate_and_register_addrspace( |
| ð1394_highlevel, host, &addr_ops, |
| ETHER1394_REGION_ADDR_LEN, ETHER1394_REGION_ADDR_LEN, |
| CSR1212_INVALID_ADDR_SPACE, CSR1212_INVALID_ADDR_SPACE); |
| if (fifo_addr == CSR1212_INVALID_ADDR_SPACE) { |
| ETH1394_PRINT_G(KERN_ERR, "Cannot register CSR space\n"); |
| hpsb_config_rom_ip1394_remove(host); |
| return; |
| } |
| |
| dev = alloc_netdev(sizeof(*priv), "eth%d", ether1394_init_dev); |
| if (dev == NULL) { |
| ETH1394_PRINT_G(KERN_ERR, "Out of memory\n"); |
| goto out; |
| } |
| |
| SET_MODULE_OWNER(dev); |
| #if 0 |
| /* FIXME - Is this the correct parent device anyway? */ |
| SET_NETDEV_DEV(dev, &host->device); |
| #endif |
| |
| priv = netdev_priv(dev); |
| INIT_LIST_HEAD(&priv->ip_node_list); |
| spin_lock_init(&priv->lock); |
| priv->host = host; |
| priv->local_fifo = fifo_addr; |
| INIT_WORK(&priv->wake, ether1394_wake_queue); |
| priv->wake_dev = dev; |
| |
| hi = hpsb_create_hostinfo(ð1394_highlevel, host, sizeof(*hi)); |
| if (hi == NULL) { |
| ETH1394_PRINT_G(KERN_ERR, "Out of memory\n"); |
| goto out; |
| } |
| |
| ether1394_reset_priv(dev, 1); |
| |
| if (register_netdev(dev)) { |
| ETH1394_PRINT_G(KERN_ERR, "Cannot register the driver\n"); |
| goto out; |
| } |
| |
| ETH1394_PRINT(KERN_INFO, dev->name, "IPv4 over IEEE 1394 (fw-host%d)\n", |
| host->id); |
| |
| hi->host = host; |
| hi->dev = dev; |
| |
| /* Ignore validity in hopes that it will be set in the future. It'll |
| * be checked when the eth device is opened. */ |
| priv->broadcast_channel = host->csr.broadcast_channel & 0x3f; |
| |
| ether1394_recv_init(priv); |
| return; |
| out: |
| if (dev) |
| free_netdev(dev); |
| if (hi) |
| hpsb_destroy_hostinfo(ð1394_highlevel, host); |
| hpsb_unregister_addrspace(ð1394_highlevel, host, fifo_addr); |
| hpsb_config_rom_ip1394_remove(host); |
| } |
| |
| /* Remove a card from our list */ |
| static void ether1394_remove_host(struct hpsb_host *host) |
| { |
| struct eth1394_host_info *hi; |
| struct eth1394_priv *priv; |
| |
| hi = hpsb_get_hostinfo(ð1394_highlevel, host); |
| if (!hi) |
| return; |
| priv = netdev_priv(hi->dev); |
| hpsb_unregister_addrspace(ð1394_highlevel, host, priv->local_fifo); |
| hpsb_config_rom_ip1394_remove(host); |
| if (priv->iso) |
| hpsb_iso_shutdown(priv->iso); |
| unregister_netdev(hi->dev); |
| free_netdev(hi->dev); |
| } |
| |
| /* A bus reset happened */ |
| static void ether1394_host_reset(struct hpsb_host *host) |
| { |
| struct eth1394_host_info *hi; |
| struct eth1394_priv *priv; |
| struct net_device *dev; |
| struct list_head *lh, *n; |
| struct eth1394_node_ref *node; |
| struct eth1394_node_info *node_info; |
| unsigned long flags; |
| |
| hi = hpsb_get_hostinfo(ð1394_highlevel, host); |
| |
| /* This can happen for hosts that we don't use */ |
| if (!hi) |
| return; |
| |
| dev = hi->dev; |
| priv = netdev_priv(dev); |
| |
| /* Reset our private host data, but not our MTU */ |
| netif_stop_queue(dev); |
| ether1394_reset_priv(dev, 0); |
| |
| list_for_each_entry(node, &priv->ip_node_list, list) { |
| node_info = 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; |
| |
| if (eth->h_proto == htons(ETH_P_IP)) |
| return arp_find((unsigned char *)ð->h_dest, skb); |
| |
| ETH1394_PRINT(KERN_DEBUG, skb->dev->name, |
| "unable to resolve type %04x addresses\n", |
| ntohs(eth->h_proto)); |
| return 0; |
| } |
| |
| static int ether1394_header_parse(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 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, |
| struct net_device *dev, |
| 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 u16 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 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 == 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 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 == 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; |
| 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 (unlikely(!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 (unlikely(!skb)) { |
| ETH1394_PRINT_G(KERN_ERR, "Out of memory\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 (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) |
| { |
| 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 (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 = (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 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 (dg_size + adj_max_payload - 1) / 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 eth1394_priv *priv = netdev_priv(skb->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, 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 int ether1394_tx(struct sk_buff *skb, struct net_device *dev) |
| { |
| struct eth1394hdr *eth; |
| 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 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 == 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((u64 *)eth->h_dest); |
| |
| node = eth1394_find_node_guid(&priv->ip_node_list, |
| be64_to_cpu(guid)); |
| if (!node) |
| goto fail; |
| |
| node_info = |
| (struct eth1394_node_info *)node->ud->device.driver_data; |
| 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; |
| |
| /* 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); |
| priv->stats.tx_dropped++; |
| priv->stats.tx_errors++; |
| spin_unlock_irqrestore(&priv->lock, flags); |
| |
| /* |
| * FIXME: According to a patch from 2003-02-26, "returning non-zero |
| * causes serious problems" here, allegedly. Before that patch, |
| * -ERRNO was returned which is not appropriate under Linux 2.6. |
| * Perhaps more needs to be done? Stop the queue in serious |
| * conditions and restart it elsewhere? |
| */ |
| /* return NETDEV_TX_BUSY; */ |
| return NETDEV_TX_OK; |
| } |
| |
| static void ether1394_get_drvinfo(struct net_device *dev, |
| struct ethtool_drvinfo *info) |
| { |
| strcpy(info->driver, driver_name); |
| strcpy(info->bus_info, "ieee1394"); /* FIXME provide more detail? */ |
| } |
| |
| static struct ethtool_ops ethtool_ops = { |
| .get_drvinfo = ether1394_get_drvinfo |
| }; |
| |
| static int __init ether1394_init_module(void) |
| { |
| int err; |
| |
| packet_task_cache = kmem_cache_create("packet_task", |
| sizeof(struct packet_task), |
| 0, 0, NULL, NULL); |
| if (!packet_task_cache) |
| return -ENOMEM; |
| |
| hpsb_register_highlevel(ð1394_highlevel); |
| err = hpsb_register_protocol(ð1394_proto_driver); |
| if (err) { |
| hpsb_unregister_highlevel(ð1394_highlevel); |
| kmem_cache_destroy(packet_task_cache); |
| } |
| return err; |
| } |
| |
| 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); |