#include <linux/types.h>
#include <linux/delay.h>
#include <linux/init.h>
+#include <linux/workqueue.h>
#include <linux/netdevice.h>
#include <linux/inetdevice.h>
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;
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);
+ 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 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,
};
/* 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)
spin_unlock_irqrestore(&priv->lock, flags);
}
+static const struct header_ops ether1394_header_ops = {
+ .create = ether1394_header,
+ .rebuild = ether1394_rebuild_header,
+ .cache = ether1394_header_cache,
+ .cache_update = ether1394_header_cache_update,
+ .parse = ether1394_header_parse,
+};
+
+static const struct net_device_ops ether1394_netdev_ops = {
+ .ndo_open = ether1394_open,
+ .ndo_stop = ether1394_stop,
+ .ndo_start_xmit = ether1394_tx,
+ .ndo_tx_timeout = ether1394_tx_timeout,
+ .ndo_change_mtu = ether1394_change_mtu,
+};
+
static void ether1394_init_dev(struct net_device *dev)
{
- dev->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->header_ops = ðer1394_header_ops;
+ dev->netdev_ops = ðer1394_netdev_ops;
SET_ETHTOOL_OPS(dev, ðtool_ops);
}
/*
+ * 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.
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) {
* 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);
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;
+ __be16 type = hh->hh_type;
struct net_device *dev = neigh->dev;
struct eth1394hdr *eth =
(struct eth1394hdr *)((u8 *)hh->hh_data + 16 - ETH1394_HLEN);
/* 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);
}
******************************************/
/* Copied from net/ethernet/eth.c */
-static 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;
/* 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,
+static __be16 ether1394_parse_encap(struct sk_buff *skb, struct net_device *dev,
nodeid_t srcid, nodeid_t destid,
- u16 ether_type)
+ __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. */
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 |
priv->host->csr.guid_lo);
node = eth1394_find_node_guid(&priv->ip_node_list,
be64_to_cpu(guid));
if (!node)
- return 0;
+ return cpu_to_be16(0);
node_info =
(struct eth1394_node_info *)node->ud->device.driver_data;
}
/* 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;
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;
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;
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++;
+ dev->stats.rx_dropped++;
return -1;
}
skb_reserve(skb, (dev->hard_header_len + 15) & ~15);
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)) {
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;
}
static void ether1394_iso(struct hpsb_iso *iso)
{
- quadlet_t *data;
+ __be32 *data;
char *buf;
struct eth1394_host_info *hi;
struct net_device *dev;
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;
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 unsigned int ether1394_encapsulate(struct sk_buff *skb,
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, "Out of tlabels\n");
- return -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;
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);
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;
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);
+ struct net_device *dev = skb->dev;
+ struct eth1394_priv *priv = netdev_priv(dev);
unsigned long flags;
/* Statistics */
spin_lock_irqsave(&priv->lock, flags);
if (fail) {
- priv->stats.tx_dropped++;
- priv->stats.tx_errors++;
+ 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);
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)
{
- struct eth1394hdr *eth;
+ struct eth1394hdr hdr_buf;
struct eth1394_priv *priv = netdev_priv(dev);
__be16 proto;
unsigned long flags;
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)))) {
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));
/* 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;
+
+ /* 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:
dev_kfree_skb(skb);
spin_lock_irqsave(&priv->lock, flags);
- priv->stats.tx_dropped++;
- priv->stats.tx_errors++;
+ dev->stats.tx_dropped++;
+ dev->stats.tx_errors++;
spin_unlock_irqrestore(&priv->lock, flags);
/*
packet_task_cache = kmem_cache_create("packet_task",
sizeof(struct packet_task),
- 0, 0, NULL, NULL);
+ 0, 0, NULL);
if (!packet_task_cache)
return -ENOMEM;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff