/*
- * eth1394.c -- Ethernet driver for Linux IEEE-1394 Subsystem
+ * eth1394.c -- IPv4 driver for Linux IEEE-1394 Subsystem
*
* Copyright (C) 2001-2003 Ben Collins <bcollins@debian.org>
* 2000 Bonin Franck <boninf@free.fr>
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
-/* This driver intends to support RFC 2734, which describes a method for
- * transporting IPv4 datagrams over IEEE-1394 serial busses. This driver
- * will ultimately support that method, but currently falls short in
- * several areas.
+/*
+ * This driver intends to support RFC 2734, which describes a method for
+ * transporting IPv4 datagrams over IEEE-1394 serial busses.
*
* TODO:
* RFC 2734 related:
* - Consider garbage collecting old partial datagrams after X amount of time
*/
-
#include <linux/module.h>
#include <linux/kernel.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/etherdevice.h>
#include <linux/if_arp.h>
#include <linux/if_ether.h>
#include <linux/ip.h>
#define ETH1394_PRINT(level, dev_name, fmt, args...) \
printk(level "%s: %s: " fmt, driver_name, dev_name, ## args)
-#define DEBUG(fmt, args...) \
- printk(KERN_ERR "%s:%s[%d]: " fmt "\n", driver_name, __FUNCTION__, __LINE__, ## args)
-#define TRACE() printk(KERN_ERR "%s:%s[%d] ---- TRACE\n", driver_name, __FUNCTION__, __LINE__)
-
struct fragment_info {
struct list_head list;
int offset;
struct list_head list;
u16 dgl;
u16 dg_size;
- u16 ether_type;
+ __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 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 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 */
+ u16 maxpayload; /* max payload */
+ u8 sspd; /* max speed */
+ u64 fifo; /* FIFO address */
+ struct pdg_list pdg; /* partial RX datagram lists */
+ int dgl; /* outgoing datagram label */
};
-/* Our ieee1394 highlevel driver */
-#define ETH1394_DRIVER_NAME "eth1394"
-static const char driver_name[] = ETH1394_DRIVER_NAME;
+static const char driver_name[] = "eth1394";
static struct kmem_cache *packet_task_cache;
/* 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)
+ sizeof(struct eth1394_uf_hdr),
+ sizeof(struct eth1394_ff_hdr),
+ sizeof(struct eth1394_sf_hdr),
+ sizeof(struct eth1394_sf_hdr)
};
-/* Change this to IEEE1394_SPEED_S100 to make testing easier */
-#define ETH1394_SPEED_DEF IEEE1394_SPEED_MAX
-
-/* For now, this needs to be 1500, so that XP works with us */
-#define ETH1394_DATA_LEN ETH_DATA_LEN
-
static const u16 eth1394_speedto_maxpayload[] = {
/* S100, S200, S400, S800, S1600, S3200 */
512, 1024, 2048, 4096, 4096, 4096
MODULE_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
+/*
+ * 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 ether1394_header(struct sk_buff *skb, struct net_device *dev,
- unsigned short type, void *daddr, void *saddr,
- unsigned len);
+ 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(struct sk_buff *skb, unsigned char *haddr);
-static int ether1394_header_cache(struct neighbour *neigh, struct hh_cache *hh);
+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,
- struct net_device *dev,
- unsigned char * haddr);
-static int ether1394_mac_addr(struct net_device *dev, void *p);
-
-static void purge_partial_datagram(struct list_head *old);
+ const struct net_device *dev,
+ const unsigned char *haddr);
static int 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);
+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 = {
+const static struct hpsb_address_ops addr_ops = {
.write = ether1394_write,
};
.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)
+static int ether1394_open(struct net_device *dev)
{
struct eth1394_priv *priv = netdev_priv(dev);
- int ret = 0;
+ int ret;
- /* Something bad happened, don't even try */
if (priv->bc_state == ETHER1394_BC_ERROR) {
- /* we'll try again */
- priv->iso = hpsb_iso_recv_init(priv->host,
- ETHER1394_ISO_BUF_SIZE,
- ETHER1394_GASP_BUFFERS,
- priv->broadcast_channel,
- HPSB_ISO_DMA_PACKET_PER_BUFFER,
- 1, ether1394_iso);
- if (priv->iso == NULL) {
- ETH1394_PRINT(KERN_ERR, dev->name,
- "Could not allocate isochronous receive "
- "context for the broadcast channel\n");
- priv->bc_state = ETHER1394_BC_ERROR;
- ret = -EAGAIN;
- } else {
- if (hpsb_iso_recv_start(priv->iso, -1, (1 << 3), -1) < 0)
- priv->bc_state = ETHER1394_BC_STOPPED;
- else
- priv->bc_state = ETHER1394_BC_RUNNING;
- }
+ ret = ether1394_recv_init(priv);
+ if (ret)
+ return ret;
}
-
- if (ret)
- return ret;
-
- netif_start_queue (dev);
+ netif_start_queue(dev);
return 0;
}
/* This is called after an "ifdown" */
-static int ether1394_stop (struct net_device *dev)
+static int ether1394_stop(struct net_device *dev)
{
- netif_stop_queue (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)
+/* 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)
{
- return &(((struct eth1394_priv *)netdev_priv(dev))->stats);
+ 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);
}
-/* 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)
+static inline int ether1394_max_mtu(struct hpsb_host* host)
{
- ETH1394_PRINT (KERN_ERR, dev->name, "Timeout, resetting host %s\n",
- ((struct eth1394_priv *)netdev_priv(dev))->host->driver->name);
-
- highlevel_host_reset (((struct eth1394_priv *)netdev_priv(dev))->host);
-
- netif_wake_queue (dev);
+ 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)
{
- struct eth1394_priv *priv = netdev_priv(dev);
+ int max_mtu;
- if ((new_mtu < 68) ||
- (new_mtu > min(ETH1394_DATA_LEN,
- (int)((1 << (priv->host->csr.max_rec + 1)) -
- (sizeof(union eth1394_hdr) +
- ETHER1394_GASP_OVERHEAD)))))
+ 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 = list_entry(old, struct partial_datagram, list);
+ 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) {
- struct fragment_info *fi = list_entry(lh, struct fragment_info, list);
+ fi = list_entry(lh, struct fragment_info, list);
list_del(lh);
kfree(fi);
}
nodeid_t nodeid)
{
struct eth1394_node_ref *node;
- list_for_each_entry(node, inl, list) {
+
+ list_for_each_entry(node, inl, list)
if (node->ud->ne->nodeid == nodeid)
return node;
- }
return NULL;
}
-static int eth1394_probe(struct device *dev)
+static int eth1394_new_node(struct eth1394_host_info *hi,
+ struct unit_directory *ud)
{
- struct unit_directory *ud;
- struct eth1394_host_info *hi;
struct eth1394_priv *priv;
struct eth1394_node_ref *new_node;
struct eth1394_node_info *node_info;
- ud = container_of(dev, struct unit_directory, device);
-
- hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host);
- if (!hi)
- return -ENOENT;
-
- new_node = kmalloc(sizeof(*new_node),
- in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
+ new_node = kmalloc(sizeof(*new_node), GFP_KERNEL);
if (!new_node)
return -ENOMEM;
- node_info = kmalloc(sizeof(*node_info),
- in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
+ node_info = kmalloc(sizeof(*node_info), GFP_KERNEL);
if (!node_info) {
kfree(new_node);
return -ENOMEM;
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;
priv = netdev_priv(hi->dev);
old_node = eth1394_find_node(&priv->ip_node_list, ud);
+ if (!old_node)
+ return 0;
- if (old_node) {
- list_del(&old_node->list);
- kfree(old_node);
+ list_del(&old_node->list);
+ kfree(old_node);
- node_info = (struct eth1394_node_info*)ud->device.driver_data;
+ 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);
+ 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;
- }
+ kfree(node_info);
+ ud->device.driver_data = NULL;
return 0;
}
struct eth1394_host_info *hi;
struct eth1394_priv *priv;
struct eth1394_node_ref *node;
- struct eth1394_node_info *node_info;
hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host);
if (!hi)
return -ENOENT;
priv = netdev_priv(hi->dev);
-
node = eth1394_find_node(&priv->ip_node_list, ud);
+ if (node)
+ return 0;
- if (!node) {
- node = kmalloc(sizeof(*node),
- in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
- if (!node)
- return -ENOMEM;
-
- node_info = kmalloc(sizeof(*node_info),
- in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
- if (!node_info) {
- kfree(node);
- return -ENOMEM;
- }
-
- spin_lock_init(&node_info->pdg.lock);
- INIT_LIST_HEAD(&node_info->pdg.list);
- node_info->pdg.sz = 0;
-
- ud->device.driver_data = node_info;
- node->ud = ud;
-
- priv = netdev_priv(hi->dev);
- list_add_tail(&node->list, &priv->ip_node_list);
- }
-
- return 0;
+ return eth1394_new_node(hi, ud);
}
-
static struct ieee1394_device_id eth1394_id_table[] = {
{
.match_flags = (IEEE1394_MATCH_SPECIFIER_ID |
MODULE_DEVICE_TABLE(ieee1394, eth1394_id_table);
static struct hpsb_protocol_driver eth1394_proto_driver = {
- .name = ETH1394_DRIVER_NAME,
+ .name = driver_name,
.id_table = eth1394_id_table,
.update = eth1394_update,
.driver = {
},
};
-
-static void ether1394_reset_priv (struct net_device *dev, int set_mtu)
+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]));
- u16 maxpayload = 1 << (host->csr.max_rec + 1);
+ u64 guid = get_unaligned((u64 *)&(host->csr.rom->bus_info_data[3]));
int max_speed = IEEE1394_SPEED_MAX;
- spin_lock_irqsave (&priv->lock, flags);
+ spin_lock_irqsave(&priv->lock, flags);
- memset(priv->ud_list, 0, sizeof(struct node_entry*) * ALL_NODES);
+ memset(priv->ud_list, 0, sizeof(priv->ud_list));
priv->bc_maxpayload = 512;
/* Determine speed limit */
- for (i = 0; i < host->node_count; i++)
+ /* 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;
- /* We'll use our maxpayload as the default mtu */
if (set_mtu) {
- dev->mtu = min(ETH1394_DATA_LEN,
- (int)(maxpayload -
- (sizeof(union eth1394_hdr) +
- ETHER1394_GASP_OVERHEAD)));
+ /* 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);
+ spin_unlock_irqrestore(&priv->lock, flags);
}
-/* This function is called right before register_netdev */
-static void ether1394_init_dev (struct net_device *dev)
+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)
{
- /* Our functions */
- dev->open = ether1394_open;
- dev->stop = ether1394_stop;
- dev->hard_start_xmit = ether1394_tx;
- dev->get_stats = ether1394_stats;
- dev->tx_timeout = ether1394_tx_timeout;
- dev->change_mtu = ether1394_change_mtu;
-
- dev->hard_header = ether1394_header;
- dev->rebuild_header = ether1394_rebuild_header;
- dev->hard_header_cache = ether1394_header_cache;
- dev->header_cache_update= ether1394_header_cache_update;
- dev->hard_header_parse = ether1394_header_parse;
- dev->set_mac_address = ether1394_mac_addr;
+
+ dev->header_ops = ðer1394_header_ops;
+ dev->netdev_ops = ðer1394_netdev_ops;
+
SET_ETHTOOL_OPS(dev, ðtool_ops);
- /* Some constants */
dev->watchdog_timeo = ETHER1394_TIMEOUT;
dev->flags = IFF_BROADCAST | IFF_MULTICAST;
dev->features = NETIF_F_HIGHDMA;
dev->hard_header_len = ETH1394_HLEN;
dev->type = ARPHRD_IEEE1394;
- ether1394_reset_priv (dev, 1);
+ /* 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);
}
/*
* 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)
+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 (!(host->config_roms & HPSB_CONFIG_ROM_ENTRY_IP1394))
+ 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,
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;
}
- /* We should really have our own alloc_hpsbdev() function in
- * net_init.c instead of calling the one for ethernet then hijacking
- * it for ourselves. That way we'd be a real networking device. */
- dev = alloc_etherdev(sizeof (struct eth1394_priv));
-
+ dev = alloc_netdev(sizeof(*priv), "eth%d", ether1394_init_dev);
if (dev == NULL) {
- ETH1394_PRINT_G (KERN_ERR, "Out of memory trying to allocate "
- "etherdevice for IEEE 1394 device %s-%d\n",
- host->driver->name, host->id);
+ 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 trying to create "
- "hostinfo for IEEE 1394 device %s-%d\n",
- host->driver->name, host->id);
+ ETH1394_PRINT_G(KERN_ERR, "Out of memory\n");
goto out;
- }
+ }
- ether1394_init_dev(dev);
+ ether1394_reset_priv(dev, 1);
- if (register_netdev (dev)) {
- ETH1394_PRINT (KERN_ERR, dev->name, "Error registering network driver\n");
+ if (register_netdev(dev)) {
+ ETH1394_PRINT_G(KERN_ERR, "Cannot register the driver\n");
goto out;
}
- ETH1394_PRINT (KERN_INFO, dev->name, "IEEE-1394 IPv4 over 1394 Ethernet (fw-host%d)\n",
- host->id);
+ ETH1394_PRINT(KERN_INFO, dev->name, "IPv4 over IEEE 1394 (fw-host%d)\n",
+ host->id);
hi->host = host;
hi->dev = dev;
* be checked when the eth device is opened. */
priv->broadcast_channel = host->csr.broadcast_channel & 0x3f;
- priv->iso = hpsb_iso_recv_init(host,
- ETHER1394_ISO_BUF_SIZE,
- ETHER1394_GASP_BUFFERS,
- priv->broadcast_channel,
- HPSB_ISO_DMA_PACKET_PER_BUFFER,
- 1, ether1394_iso);
- if (priv->iso == NULL) {
- ETH1394_PRINT(KERN_ERR, dev->name,
- "Could not allocate isochronous receive context "
- "for the broadcast channel\n");
- priv->bc_state = ETHER1394_BC_ERROR;
- } else {
- if (hpsb_iso_recv_start(priv->iso, -1, (1 << 3), -1) < 0)
- priv->bc_state = ETHER1394_BC_STOPPED;
- else
- priv->bc_state = ETHER1394_BC_RUNNING;
- }
+ ether1394_recv_init(priv);
return;
out:
if (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)
+static void ether1394_remove_host(struct hpsb_host *host)
{
struct eth1394_host_info *hi;
struct eth1394_priv *priv;
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 reset has just arisen */
-static void ether1394_host_reset (struct hpsb_host *host)
+/* A bus reset happened */
+static void ether1394_host_reset(struct hpsb_host *host)
{
struct eth1394_host_info *hi;
struct eth1394_priv *priv;
return;
dev = hi->dev;
- priv = (struct eth1394_priv *)netdev_priv(dev);
+ priv = netdev_priv(dev);
- /* Reset our private host data, but not our mtu */
- netif_stop_queue (dev);
- ether1394_reset_priv (dev, 0);
+ /* Reset our private host data, but not our MTU */
+ netif_stop_queue(dev);
+ ether1394_reset_priv(dev, 0);
list_for_each_entry(node, &priv->ip_node_list, list) {
- node_info = (struct eth1394_node_info*)node->ud->device.driver_data;
+ 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) {
+ 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);
+ netif_wake_queue(dev);
}
/******************************************
******************************************/
/* 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)
+ unsigned short type, const void *daddr,
+ const void *saddr, unsigned len)
{
- struct eth1394hdr *eth = (struct eth1394hdr *)skb_push(skb, ETH1394_HLEN);
+ struct eth1394hdr *eth =
+ (struct eth1394hdr *)skb_push(skb, ETH1394_HLEN);
eth->h_proto = htons(type);
- if (dev->flags & (IFF_LOOPBACK|IFF_NOARP)) {
+ if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) {
memset(eth->h_dest, 0, dev->addr_len);
- return(dev->hard_header_len);
+ return dev->hard_header_len;
}
if (daddr) {
- memcpy(eth->h_dest,daddr,dev->addr_len);
+ 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.
static int ether1394_rebuild_header(struct sk_buff *skb)
{
struct eth1394hdr *eth = (struct eth1394hdr *)skb->data;
- struct net_device *dev = skb->dev;
- switch (eth->h_proto) {
-
-#ifdef CONFIG_INET
- case __constant_htons(ETH_P_IP):
- return arp_find((unsigned char*)ð->h_dest, skb);
-#endif
- default:
- ETH1394_PRINT(KERN_DEBUG, dev->name,
- "unable to resolve type %04x addresses.\n",
- ntohs(eth->h_proto));
- break;
- }
+ 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)
+static int ether1394_header_parse(const struct sk_buff *skb,
+ unsigned char *haddr)
{
- struct net_device *dev = skb->dev;
- memcpy(haddr, dev->dev_addr, ETH1394_ALEN);
+ memcpy(haddr, skb->dev->dev_addr, ETH1394_ALEN);
return ETH1394_ALEN;
}
-
-static int ether1394_header_cache(struct neighbour *neigh, struct hh_cache *hh)
+static int ether1394_header_cache(const struct neighbour *neigh,
+ struct hh_cache *hh)
{
- unsigned short type = hh->hh_type;
- struct eth1394hdr *eth = (struct eth1394hdr*)(((u8*)hh->hh_data) +
- (16 - ETH1394_HLEN));
+ __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;
/* 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)
+ const struct net_device *dev,
+ const unsigned char * haddr)
{
- memcpy(((u8*)hh->hh_data) + (16 - ETH1394_HLEN), haddr, dev->addr_len);
+ memcpy((u8 *)hh->hh_data + 16 - ETH1394_HLEN, haddr, dev->addr_len);
}
-static int ether1394_mac_addr(struct net_device *dev, void *p)
-{
- if (netif_running(dev))
- return -EBUSY;
-
- /* Not going to allow setting the MAC address, we really need to use
- * the real one supplied by the hardware */
- return -EINVAL;
- }
-
-
-
/******************************************
* Datagram reception code
******************************************/
/* Copied from net/ethernet/eth.c */
-static inline u16 ether1394_type_trans(struct sk_buff *skb,
- struct net_device *dev)
+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);
+ 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)
+ if (memcmp(eth->h_dest, dev->broadcast, dev->addr_len) == 0)
skb->pkt_type = PACKET_BROADCAST;
#if 0
else
} else {
if (memcmp(eth->h_dest, dev->dev_addr, dev->addr_len))
skb->pkt_type = PACKET_OTHERHOST;
- }
+ }
- if (ntohs (eth->h_proto) >= 1536)
+ if (ntohs(eth->h_proto) >= 1536)
return eth->h_proto;
rawp = skb->data;
- if (*(unsigned short *)rawp == 0xFFFF)
- return htons (ETH_P_802_3);
+ if (*(unsigned short *)rawp == 0xFFFF)
+ return htons(ETH_P_802_3);
- return htons (ETH_P_802_2);
+ return htons(ETH_P_802_2);
}
/* Parse an encapsulated IP1394 header into an ethernet frame packet.
* We also perform ARP translation here, if need be. */
-static inline u16 ether1394_parse_encap(struct sk_buff *skb,
- struct net_device *dev,
- nodeid_t srcid, nodeid_t destid,
- u16 ether_type)
+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);
- u64 dest_hw;
- unsigned short ret = 0;
+ __be64 dest_hw;
+ __be16 ret = 0;
- /* Setup our hw addresses. We use these to build the
- * ethernet header. */
+ /* Setup our hw addresses. We use these to build the ethernet header. */
if (destid == (LOCAL_BUS | ALL_NODES))
- dest_hw = ~0ULL; /* broadcast */
+ dest_hw = ~cpu_to_be64(0); /* broadcast */
else
- dest_hw = cpu_to_be64((((u64)priv->host->csr.guid_hi) << 32) |
+ 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 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);
+ ntohl(arp1394->fifo_lo);
u8 max_rec = min(priv->host->csr.max_rec,
(u8)(arp1394->max_rec));
int sspd = arp1394->sspd;
if (sspd > 5 || sspd < 0)
sspd = 0;
- maxpayload = min(eth1394_speedto_maxpayload[sspd], (u16)(1 << (max_rec + 1)));
+ 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;
- }
+ if (!node)
+ return cpu_to_be16(0);
- node_info = (struct eth1394_node_info*)node->ud->device.driver_data;
+ node_info =
+ (struct eth1394_node_info *)node->ud->device.driver_data;
/* Update our speed/payload/fifo_offset table */
node_info->maxpayload = maxpayload;
arp->ar_hln = 8;
arp_ptr += arp->ar_hln; /* skip over sender unique id */
- *(u32*)arp_ptr = arp1394->sip; /* move sender IP addr */
+ *(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))
}
/* Now add the ethernet header. */
- if (dev->hard_header(skb, dev, ntohs(ether_type), &dest_hw, NULL,
- skb->len) >= 0)
+ if (dev_hard_header(skb, dev, ntohs(ether_type), &dest_hw, NULL,
+ skb->len) >= 0)
ret = ether1394_type_trans(skb, dev);
return ret;
}
-static inline int fragment_overlap(struct list_head *frag_list, int offset, int len)
+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 - 1)) ||
- ((offset + len - 1) < fi->offset)))
+ list_for_each_entry(fi, frag_list, list)
+ if (offset < fi->offset + fi->len && end > fi->offset)
return 1;
- }
+
return 0;
}
-static inline struct list_head *find_partial_datagram(struct list_head *pdgl, int dgl)
+static struct list_head *find_partial_datagram(struct list_head *pdgl, int dgl)
{
struct partial_datagram *pd;
- list_for_each_entry(pd, pdgl, list) {
+ list_for_each_entry(pd, pdgl, list)
if (pd->dgl == dgl)
return &pd->list;
- }
+
return NULL;
}
/* Assumes that new fragment does not overlap any existing fragments */
-static inline int new_fragment(struct list_head *frag_info, int offset, int len)
+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) {
+ 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) {
+ 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) {
+ } 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) {
+ 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)) {
+ } else if (offset > fi->offset + fi->len) {
break;
- } else if ((offset + len) < fi->offset) {
+ } else if (offset + len < fi->offset) {
lh = lh->prev;
break;
}
new->len = len;
list_add(&new->list, lh);
-
return 0;
}
-static inline int new_partial_datagram(struct net_device *dev,
- struct list_head *pdgl, int dgl,
- int dg_size, char *frag_buf,
- int frag_off, int frag_len)
+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;
memcpy(new->pbuf + frag_off, frag_buf, frag_len);
list_add(&new->list, pdgl);
-
return 0;
}
-static inline int update_partial_datagram(struct list_head *pdgl, struct list_head *lh,
- char *frag_buf, int frag_off, int frag_len)
+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);
+ struct partial_datagram *pd =
+ list_entry(lh, struct partial_datagram, list);
- if (new_fragment(&pd->frag_info, frag_off, frag_len) < 0) {
+ 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 inline int is_datagram_complete(struct list_head *lh, int dg_size)
+static int is_datagram_complete(struct list_head *lh, int dg_size)
{
- struct partial_datagram *pd = list_entry(lh, struct partial_datagram, list);
- struct fragment_info *fi = list_entry(pd->frag_info.next,
- struct fragment_info, list);
+ 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);
}
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 */
+ __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 (!node) {
+ 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++;
+ dev->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;
+ 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);
* high level network layer. */
skb = dev_alloc_skb(len + dev->hard_header_len + 15);
- if (!skb) {
- HPSB_PRINT (KERN_ERR, "ether1394 rx: low on mem\n");
- priv->stats.rx_dropped++;
+ 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);
+ 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. */
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)) {
pd = list_entry(lh, struct partial_datagram, list);
- if (hdr->common.lf == ETH1394_HDR_LF_FF) {
+ 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;
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->stats.rx_errors++;
+ dev->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;
+ } 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;
}
- /* Statistics */
- priv->stats.rx_packets++;
- priv->stats.rx_bytes += skb->len;
+ spin_unlock_irqrestore(&priv->lock, flags);
bad_proto:
if (netif_queue_stopped(dev))
netif_wake_queue(dev);
- spin_unlock_irqrestore(&priv->lock, flags);
-
- dev->last_rx = jiffies;
return 0;
}
struct eth1394_host_info *hi;
hi = hpsb_get_hostinfo(ð1394_highlevel, host);
- if (hi == NULL) {
- ETH1394_PRINT_G(KERN_ERR, "Could not find net device for host %s\n",
- host->driver->name);
+ if (unlikely(!hi)) {
+ ETH1394_PRINT_G(KERN_ERR, "No net device at fw-host%d\n",
+ host->id);
return RCODE_ADDRESS_ERROR;
}
static void ether1394_iso(struct hpsb_iso *iso)
{
- quadlet_t *data;
+ __be32 *data;
char *buf;
struct eth1394_host_info *hi;
struct net_device *dev;
int nready;
hi = hpsb_get_hostinfo(ð1394_highlevel, iso->host);
- if (hi == NULL) {
- ETH1394_PRINT_G(KERN_ERR, "Could not find net device for host %s\n",
- iso->host->driver->name);
+ if (unlikely(!hi)) {
+ ETH1394_PRINT_G(KERN_ERR, "No net device at fw-host%d\n",
+ iso->host->id);
return;
}
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);
+ 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));
+ 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) {
+ if (info->channel != (iso->host->csr.broadcast_channel & 0x3f)
+ || specifier_id != ETHER1394_GASP_SPECIFIER_ID) {
/* This packet is not for us */
continue;
}
* speed, and unicast FIFO address information between the sender_unique_id
* and the IP addresses.
*/
-static inline void ether1394_arp_to_1394arp(struct sk_buff *skb,
- struct net_device *dev)
+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;
- /* Believe it or not, all that need to happen is sender IP get moved
- * and set hw_addr_len, max_rec, sspd, fifo_hi and fifo_lo. */
arp1394->hw_addr_len = 16;
arp1394->sip = *(u32*)(arp_ptr + ETH1394_ALEN);
arp1394->max_rec = priv->host->csr.max_rec;
arp1394->sspd = priv->host->csr.lnk_spd;
- arp1394->fifo_hi = htons (priv->local_fifo >> 32);
- arp1394->fifo_lo = htonl (priv->local_fifo & ~0x0);
-
- return;
+ 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 inline unsigned int ether1394_encapsulate_prep(unsigned int max_payload,
- __be16 proto,
- union eth1394_hdr *hdr,
- u16 dg_size, u16 dgl)
+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];
+ 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->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);
+ return DIV_ROUND_UP(dg_size, adj_max_payload);
}
-static inline unsigned int ether1394_encapsulate(struct sk_buff *skb,
- unsigned int max_payload,
- union eth1394_hdr *hdr)
+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) {
+ switch (ftype) {
case ETH1394_HDR_LF_UF:
bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz);
bufhdr->words.word1 = htons(hdr->words.word1);
bufhdr->words.word3 = htons(hdr->words.word3);
bufhdr->words.word4 = 0;
}
-
return min(max_payload, skb->len);
}
-static inline struct hpsb_packet *ether1394_alloc_common_packet(struct hpsb_host *host)
+static struct hpsb_packet *ether1394_alloc_common_packet(struct hpsb_host *host)
{
struct hpsb_packet *p;
return p;
}
-static inline int ether1394_prep_write_packet(struct hpsb_packet *p,
- struct hpsb_host *host,
- nodeid_t node, u64 addr,
- void * data, int tx_len)
+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;
- p->data = NULL;
- p->tcode = TCODE_WRITEB;
- p->header[1] = (host->node_id << 16) | (addr >> 32);
- p->header[2] = addr & 0xffffffff;
+ if (hpsb_get_tlabel(p))
+ return -EAGAIN;
+ p->tcode = TCODE_WRITEB;
p->header_size = 16;
p->expect_response = 1;
-
- if (hpsb_get_tlabel(p)) {
- ETH1394_PRINT_G(KERN_ERR, "No more tlabels left while sending "
- "to node " NODE_BUS_FMT "\n", NODE_BUS_ARGS(host, node));
- return -1;
- }
- p->header[0] = (p->node_id << 16) | (p->tlabel << 10)
- | (1 << 8) | (TCODE_WRITEB << 4);
-
+ p->header[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 = (quadlet_t*)data;
+ p->data = data;
return 0;
}
-static inline void ether1394_prep_gasp_packet(struct hpsb_packet *p,
- struct eth1394_priv *priv,
- struct sk_buff *skb, int length)
+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->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) |
+ 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) |
+ p->data[1] = cpu_to_be32(ETHER1394_GASP_SPECIFIER_ID_LO << 24 |
ETHER1394_GASP_VERSION);
- /* Setting the node id to ALL_NODES (not LOCAL_BUS | ALL_NODES)
- * prevents hpsb_send_packet() from setting the speed to an arbitrary
- * value based on packet->node_id if packet->node_id is not set. */
- p->node_id = ALL_NODES;
p->speed_code = priv->bc_sspd;
+
+ /* prevent hpsb_send_packet() from overriding our speed code */
+ p->node_id = LOCAL_BUS | ALL_NODES;
}
-static inline void ether1394_free_packet(struct hpsb_packet *packet)
+static void ether1394_free_packet(struct hpsb_packet *packet)
{
if (packet->tcode != TCODE_STREAM_DATA)
hpsb_free_tlabel(packet);
packet = ether1394_alloc_common_packet(priv->host);
if (!packet)
- return -1;
+ return -ENOMEM;
if (ptask->tx_type == ETH1394_GASP) {
- int length = tx_len + (2 * sizeof(quadlet_t));
+ 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->addr, ptask->skb->data,
tx_len)) {
hpsb_free_packet(packet);
- return -1;
+ return -EAGAIN;
}
ptask->packet = packet;
if (hpsb_send_packet(packet) < 0) {
ether1394_free_packet(packet);
- return -1;
+ return -EIO;
}
return 0;
}
-
/* Task function to be run when a datagram transmission is completed */
-static inline void ether1394_dg_complete(struct packet_task *ptask, int fail)
+static void ether1394_dg_complete(struct packet_task *ptask, int fail)
{
struct sk_buff *skb = ptask->skb;
struct net_device *dev = skb->dev;
/* Statistics */
spin_lock_irqsave(&priv->lock, flags);
if (fail) {
- priv->stats.tx_dropped++;
- priv->stats.tx_errors++;
+ dev->stats.tx_dropped++;
+ dev->stats.tx_errors++;
} else {
- priv->stats.tx_bytes += skb->len;
- priv->stats.tx_packets++;
+ dev->stats.tx_bytes += skb->len;
+ dev->stats.tx_packets++;
}
spin_unlock_irqrestore(&priv->lock, flags);
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)
ptask->outstanding_pkts--;
if (ptask->outstanding_pkts > 0 && !fail) {
- int tx_len;
+ int tx_len, err;
/* Add the encapsulation header to the fragment */
tx_len = ether1394_encapsulate(ptask->skb, ptask->max_payload,
&ptask->hdr);
- if (ether1394_send_packet(ptask, tx_len))
+ 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)
+static int ether1394_tx(struct sk_buff *skb, struct net_device *dev)
{
- gfp_t kmflags = in_interrupt() ? GFP_ATOMIC : GFP_KERNEL;
- struct eth1394hdr *eth;
+ struct eth1394hdr hdr_buf;
struct eth1394_priv *priv = netdev_priv(dev);
__be16 proto;
unsigned long flags;
nodeid_t dest_node;
eth1394_tx_type tx_type;
- int ret = 0;
unsigned int tx_len;
unsigned int max_payload;
u16 dg_size;
struct eth1394_node_ref *node;
struct eth1394_node_info *node_info = NULL;
- ptask = kmem_cache_alloc(packet_task_cache, kmflags);
- if (ptask == NULL) {
- ret = -ENOMEM;
+ 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) {
- ret = -EAGAIN;
+ if ((priv->host->csr.broadcast_channel & 0xc0000000) != 0xc0000000)
goto fail;
- }
#endif
- if ((skb = skb_share_check (skb, kmflags)) == NULL) {
- ret = -ENOMEM;
+ 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;
+ /* 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 = eth->h_proto;
+ 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(eth->h_dest, dev->broadcast, ETH1394_ALEN) == 0 ||
+ 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));
+ 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);
+ __be64 guid = get_unaligned((__be64 *)hdr_buf.h_dest);
node = eth1394_find_node_guid(&priv->ip_node_list,
be64_to_cpu(guid));
- if (!node) {
- ret = -EAGAIN;
+ if (!node)
goto fail;
- }
- node_info = (struct eth1394_node_info*)node->ud->device.driver_data;
- if (node_info->fifo == CSR1212_INVALID_ADDR_SPACE) {
- ret = -EAGAIN;
+
+ 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));
+ BUG_ON(max_payload < 512 - ETHER1394_GASP_OVERHEAD);
dgl = node_info->dgl;
if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF])
/* If this is an ARP packet, convert it */
if (proto == htons(ETH_P_ARP))
- ether1394_arp_to_1394arp (skb, dev);
+ ether1394_arp_to_1394arp(skb, dev);
ptask->hdr.words.word1 = 0;
ptask->hdr.words.word2 = 0;
ptask->tx_type = tx_type;
ptask->max_payload = max_payload;
- ptask->outstanding_pkts = ether1394_encapsulate_prep(max_payload, proto,
- &ptask->hdr, dg_size,
- dgl);
+ ptask->outstanding_pkts = ether1394_encapsulate_prep(max_payload,
+ proto, &ptask->hdr, dg_size, dgl);
/* Add the encapsulation header to the fragment */
tx_len = ether1394_encapsulate(skb, max_payload, &ptask->hdr);
dev->trans_start = jiffies;
- if (ether1394_send_packet(ptask, tx_len))
- goto fail;
+ if (ether1394_send_packet(ptask, tx_len)) {
+ if (dest_node == (LOCAL_BUS | ALL_NODES))
+ goto fail;
- netif_wake_queue(dev);
- return 0;
+ /* 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);
- priv->stats.tx_dropped++;
- priv->stats.tx_errors++;
- spin_unlock_irqrestore (&priv->lock, flags);
-
- if (netif_queue_stopped(dev))
- netif_wake_queue(dev);
+ spin_lock_irqsave(&priv->lock, flags);
+ dev->stats.tx_dropped++;
+ dev->stats.tx_errors++;
+ spin_unlock_irqrestore(&priv->lock, flags);
- return 0; /* returning non-zero causes serious problems */
+ /*
+ * 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)
+static void ether1394_get_drvinfo(struct net_device *dev,
+ struct ethtool_drvinfo *info)
{
- strcpy (info->driver, driver_name);
- /* FIXME XXX provide sane businfo */
- strcpy (info->bus_info, "ieee1394");
+ 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)
+static int __init ether1394_init_module(void)
{
- packet_task_cache = kmem_cache_create("packet_task", sizeof(struct packet_task),
- 0, 0, NULL, NULL);
+ int err;
- /* Register ourselves as a highlevel driver */
- hpsb_register_highlevel(ð1394_highlevel);
+ packet_task_cache = kmem_cache_create("packet_task",
+ sizeof(struct packet_task),
+ 0, 0, NULL);
+ if (!packet_task_cache)
+ return -ENOMEM;
- return hpsb_register_protocol(ð1394_proto_driver);
+ 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)
+static void __exit ether1394_exit_module(void)
{
hpsb_unregister_protocol(ð1394_proto_driver);
hpsb_unregister_highlevel(ð1394_highlevel);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff