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-rw-r--r--drivers/firewire/Makefile2
-rw-r--r--drivers/firewire/core-card.c4
-rw-r--r--drivers/firewire/core-iso.c7
-rw-r--r--drivers/firewire/core.h87
-rw-r--r--drivers/firewire/fw-ipv4.c1819
5 files changed, 1832 insertions, 87 deletions
diff --git a/drivers/firewire/Makefile b/drivers/firewire/Makefile
index bc3b9bf822bf..31edf30c558d 100644
--- a/drivers/firewire/Makefile
+++ b/drivers/firewire/Makefile
@@ -6,7 +6,9 @@ firewire-core-y += core-card.o core-cdev.o core-device.o \
core-iso.o core-topology.o core-transaction.o
firewire-ohci-y += ohci.o
firewire-sbp2-y += sbp2.o
+firewire-ipv4-y += fw-ipv4.o
obj-$(CONFIG_FIREWIRE) += firewire-core.o
obj-$(CONFIG_FIREWIRE_OHCI) += firewire-ohci.o
obj-$(CONFIG_FIREWIRE_SBP2) += firewire-sbp2.o
+obj-$(CONFIG_FIREWIRE_IPV4) += firewire-ipv4.o
diff --git a/drivers/firewire/core-card.c b/drivers/firewire/core-card.c
index 4c1be64fdddd..cdab32b20675 100644
--- a/drivers/firewire/core-card.c
+++ b/drivers/firewire/core-card.c
@@ -176,6 +176,7 @@ int fw_core_add_descriptor(struct fw_descriptor *desc)
return 0;
}
+EXPORT_SYMBOL(fw_core_add_descriptor);
void fw_core_remove_descriptor(struct fw_descriptor *desc)
{
@@ -189,6 +190,7 @@ void fw_core_remove_descriptor(struct fw_descriptor *desc)
mutex_unlock(&card_mutex);
}
+EXPORT_SYMBOL(fw_core_remove_descriptor);
static void allocate_broadcast_channel(struct fw_card *card, int generation)
{
@@ -427,6 +429,8 @@ void fw_card_initialize(struct fw_card *card,
card->local_node = NULL;
INIT_DELAYED_WORK(&card->work, fw_card_bm_work);
+ card->netdev = NULL;
+ INIT_LIST_HEAD(&card->ipv4_nodes);
}
EXPORT_SYMBOL(fw_card_initialize);
diff --git a/drivers/firewire/core-iso.c b/drivers/firewire/core-iso.c
index 28076c892d7e..448ddd7d887b 100644
--- a/drivers/firewire/core-iso.c
+++ b/drivers/firewire/core-iso.c
@@ -80,6 +80,7 @@ int fw_iso_buffer_init(struct fw_iso_buffer *buffer, struct fw_card *card,
return -ENOMEM;
}
+EXPORT_SYMBOL(fw_iso_buffer_init);
int fw_iso_buffer_map(struct fw_iso_buffer *buffer, struct vm_area_struct *vma)
{
@@ -114,6 +115,7 @@ void fw_iso_buffer_destroy(struct fw_iso_buffer *buffer,
kfree(buffer->pages);
buffer->pages = NULL;
}
+EXPORT_SYMBOL(fw_iso_buffer_destroy);
struct fw_iso_context *fw_iso_context_create(struct fw_card *card,
int type, int channel, int speed, size_t header_size,
@@ -136,6 +138,7 @@ struct fw_iso_context *fw_iso_context_create(struct fw_card *card,
return ctx;
}
+EXPORT_SYMBOL(fw_iso_context_create);
void fw_iso_context_destroy(struct fw_iso_context *ctx)
{
@@ -143,12 +146,14 @@ void fw_iso_context_destroy(struct fw_iso_context *ctx)
card->driver->free_iso_context(ctx);
}
+EXPORT_SYMBOL(fw_iso_context_destroy);
int fw_iso_context_start(struct fw_iso_context *ctx,
int cycle, int sync, int tags)
{
return ctx->card->driver->start_iso(ctx, cycle, sync, tags);
}
+EXPORT_SYMBOL(fw_iso_context_start);
int fw_iso_context_queue(struct fw_iso_context *ctx,
struct fw_iso_packet *packet,
@@ -159,11 +164,13 @@ int fw_iso_context_queue(struct fw_iso_context *ctx,
return card->driver->queue_iso(ctx, packet, buffer, payload);
}
+EXPORT_SYMBOL(fw_iso_context_queue);
int fw_iso_context_stop(struct fw_iso_context *ctx)
{
return ctx->card->driver->stop_iso(ctx);
}
+EXPORT_SYMBOL(fw_iso_context_stop);
/*
* Isochronous bus resource management (channels, bandwidth), client side
diff --git a/drivers/firewire/core.h b/drivers/firewire/core.h
index 0a25a7b38a80..c3cfc647e5e3 100644
--- a/drivers/firewire/core.h
+++ b/drivers/firewire/core.h
@@ -1,7 +1,6 @@
#ifndef _FIREWIRE_CORE_H
#define _FIREWIRE_CORE_H
-#include <linux/dma-mapping.h>
#include <linux/fs.h>
#include <linux/list.h>
#include <linux/idr.h>
@@ -97,17 +96,6 @@ int fw_core_initiate_bus_reset(struct fw_card *card, int short_reset);
int fw_compute_block_crc(u32 *block);
void fw_schedule_bm_work(struct fw_card *card, unsigned long delay);
-struct fw_descriptor {
- struct list_head link;
- size_t length;
- u32 immediate;
- u32 key;
- const u32 *data;
-};
-
-int fw_core_add_descriptor(struct fw_descriptor *desc);
-void fw_core_remove_descriptor(struct fw_descriptor *desc);
-
/* -cdev */
@@ -130,77 +118,7 @@ void fw_node_event(struct fw_card *card, struct fw_node *node, int event);
/* -iso */
-/*
- * The iso packet format allows for an immediate header/payload part
- * stored in 'header' immediately after the packet info plus an
- * indirect payload part that is pointer to by the 'payload' field.
- * Applications can use one or the other or both to implement simple
- * low-bandwidth streaming (e.g. audio) or more advanced
- * scatter-gather streaming (e.g. assembling video frame automatically).
- */
-struct fw_iso_packet {
- u16 payload_length; /* Length of indirect payload. */
- u32 interrupt:1; /* Generate interrupt on this packet */
- u32 skip:1; /* Set to not send packet at all. */
- u32 tag:2;
- u32 sy:4;
- u32 header_length:8; /* Length of immediate header. */
- u32 header[0];
-};
-
-#define FW_ISO_CONTEXT_TRANSMIT 0
-#define FW_ISO_CONTEXT_RECEIVE 1
-
-#define FW_ISO_CONTEXT_MATCH_TAG0 1
-#define FW_ISO_CONTEXT_MATCH_TAG1 2
-#define FW_ISO_CONTEXT_MATCH_TAG2 4
-#define FW_ISO_CONTEXT_MATCH_TAG3 8
-#define FW_ISO_CONTEXT_MATCH_ALL_TAGS 15
-
-/*
- * An iso buffer is just a set of pages mapped for DMA in the
- * specified direction. Since the pages are to be used for DMA, they
- * are not mapped into the kernel virtual address space. We store the
- * DMA address in the page private. The helper function
- * fw_iso_buffer_map() will map the pages into a given vma.
- */
-struct fw_iso_buffer {
- enum dma_data_direction direction;
- struct page **pages;
- int page_count;
-};
-
-typedef void (*fw_iso_callback_t)(struct fw_iso_context *context,
- u32 cycle, size_t header_length,
- void *header, void *data);
-
-struct fw_iso_context {
- struct fw_card *card;
- int type;
- int channel;
- int speed;
- size_t header_size;
- fw_iso_callback_t callback;
- void *callback_data;
-};
-
-int fw_iso_buffer_init(struct fw_iso_buffer *buffer, struct fw_card *card,
- int page_count, enum dma_data_direction direction);
int fw_iso_buffer_map(struct fw_iso_buffer *buffer, struct vm_area_struct *vma);
-void fw_iso_buffer_destroy(struct fw_iso_buffer *buffer, struct fw_card *card);
-
-struct fw_iso_context *fw_iso_context_create(struct fw_card *card,
- int type, int channel, int speed, size_t header_size,
- fw_iso_callback_t callback, void *callback_data);
-int fw_iso_context_queue(struct fw_iso_context *ctx,
- struct fw_iso_packet *packet,
- struct fw_iso_buffer *buffer,
- unsigned long payload);
-int fw_iso_context_start(struct fw_iso_context *ctx,
- int cycle, int sync, int tags);
-int fw_iso_context_stop(struct fw_iso_context *ctx);
-void fw_iso_context_destroy(struct fw_iso_context *ctx);
-
void fw_iso_resource_manage(struct fw_card *card, int generation,
u64 channels_mask, int *channel, int *bandwidth, bool allocate);
@@ -285,9 +203,4 @@ void fw_flush_transactions(struct fw_card *card);
void fw_send_phy_config(struct fw_card *card,
int node_id, int generation, int gap_count);
-static inline int fw_stream_packet_destination_id(int tag, int channel, int sy)
-{
- return tag << 14 | channel << 8 | sy;
-}
-
#endif /* _FIREWIRE_CORE_H */
diff --git a/drivers/firewire/fw-ipv4.c b/drivers/firewire/fw-ipv4.c
new file mode 100644
index 000000000000..4de6dbb95f0c
--- /dev/null
+++ b/drivers/firewire/fw-ipv4.c
@@ -0,0 +1,1819 @@
+/*
+ * IPv4 over IEEE 1394, per RFC 2734
+ *
+ * Copyright (C) 2009 Jay Fenlason <fenlason@redhat.com>
+ *
+ * based on eth1394 by Ben Collins et al
+ */
+
+#include <linux/device.h>
+#include <linux/ethtool.h>
+#include <linux/firewire.h>
+#include <linux/firewire-constants.h>
+#include <linux/highmem.h>
+#include <linux/in.h>
+#include <linux/ip.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+
+#include <asm/unaligned.h>
+#include <net/arp.h>
+
+/* Things to potentially make runtime cofigurable */
+/* must be at least as large as our maximum receive size */
+#define FIFO_SIZE 4096
+/* Network timeout in glibbles */
+#define IPV4_TIMEOUT 100000
+
+/* Runitme configurable paramaters */
+static int ipv4_mpd = 25;
+static int ipv4_max_xmt = 0;
+/* 16k for receiving arp and broadcast packets. Enough? */
+static int ipv4_iso_page_count = 4;
+
+MODULE_AUTHOR("Jay Fenlason (fenlason@redhat.com)");
+MODULE_DESCRIPTION("Firewire IPv4 Driver (IPv4-over-IEEE1394 as per RFC 2734)");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(ieee1394, ipv4_id_table);
+module_param_named(max_partial_datagrams, ipv4_mpd, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(max_partial_datagrams, "Maximum number of received"
+ " incomplete fragmented datagrams (default = 25).");
+
+/* Max xmt is useful for forcing fragmentation, which makes testing easier. */
+module_param_named(max_transmit, ipv4_max_xmt, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(max_transmit, "Maximum datagram size to transmit"
+ " (larger datagrams will be fragmented) (default = 0 (use hardware defaults).");
+
+/* iso page count controls how many pages will be used for receiving broadcast packets. */
+module_param_named(iso_pages, ipv4_iso_page_count, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(iso_pages, "Number of pages to use for receiving broadcast packets"
+ " (default = 4).");
+
+/* uncomment this line to do debugging */
+#define fw_debug(s, args...) printk(KERN_DEBUG KBUILD_MODNAME ": " s, ## args)
+
+/* comment out these lines to do debugging. */
+/* #undef fw_debug */
+/* #define fw_debug(s...) */
+/* #define print_hex_dump(l...) */
+
+/* Define a fake hardware header format for the networking core. Note that
+ * header size cannot exceed 16 bytes as that is the size of the header cache.
+ * Also, we do not need the source address in the header so we omit it and
+ * keep the header to under 16 bytes */
+#define IPV4_ALEN (8)
+/* This must equal sizeof(struct ipv4_ether_hdr) */
+#define IPV4_HLEN (10)
+
+/* FIXME: what's a good size for this? */
+#define INVALID_FIFO_ADDR (u64)~0ULL
+
+/* Things specified by standards */
+#define BROADCAST_CHANNEL 31
+
+#define S100_BUFFER_SIZE 512
+#define MAX_BUFFER_SIZE 4096
+
+#define IPV4_GASP_SPECIFIER_ID 0x00005EU
+#define IPV4_GASP_VERSION 0x00000001U
+
+#define IPV4_GASP_OVERHEAD (2 * sizeof(u32)) /* for GASP header */
+
+#define IPV4_UNFRAG_HDR_SIZE sizeof(u32)
+#define IPV4_FRAG_HDR_SIZE (2 * sizeof(u32))
+#define IPV4_FRAG_OVERHEAD sizeof(u32)
+
+#define ALL_NODES (0xffc0 | 0x003f)
+
+#define IPV4_HDR_UNFRAG 0 /* unfragmented */
+#define IPV4_HDR_FIRSTFRAG 1 /* first fragment */
+#define IPV4_HDR_LASTFRAG 2 /* last fragment */
+#define IPV4_HDR_INTFRAG 3 /* interior fragment */
+
+/* Our arp packet (ARPHRD_IEEE1394) */
+/* FIXME: note that this is probably bogus on weird-endian machines */
+struct ipv4_arp {
+ u16 hw_type; /* 0x0018 */
+ u16 proto_type; /* 0x0806 */
+ u8 hw_addr_len; /* 16 */
+ u8 ip_addr_len; /* 4 */
+ u16 opcode; /* ARP Opcode */
+ /* Above is exactly the same format as struct arphdr */
+
+ u64 s_uniq_id; /* Sender's 64bit EUI */
+ u8 max_rec; /* Sender's max packet size */
+ u8 sspd; /* Sender's max speed */
+ u16 fifo_hi; /* hi 16bits of sender's FIFO addr */
+ u32 fifo_lo; /* lo 32bits of sender's FIFO addr */
+ u32 sip; /* Sender's IP Address */
+ u32 tip; /* IP Address of requested hw addr */
+} __attribute__((packed));
+
+struct ipv4_ether_hdr {
+ unsigned char h_dest[IPV4_ALEN]; /* destination address */
+ unsigned short h_proto; /* packet type ID field */
+} __attribute__((packed));
+
+static inline struct ipv4_ether_hdr *ipv4_ether_hdr(const struct sk_buff *skb)
+{
+ return (struct ipv4_ether_hdr *)skb_mac_header(skb);
+}
+
+enum ipv4_tx_type {
+ IPV4_UNKNOWN = 0,
+ IPV4_GASP = 1,
+ IPV4_WRREQ = 2,
+};
+
+enum ipv4_broadcast_state {
+ IPV4_BROADCAST_ERROR,
+ IPV4_BROADCAST_RUNNING,
+ IPV4_BROADCAST_STOPPED,
+};
+
+#define ipv4_get_hdr_lf(h) (((h)->w0&0xC0000000)>>30)
+#define ipv4_get_hdr_ether_type(h) (((h)->w0&0x0000FFFF) )
+#define ipv4_get_hdr_dg_size(h) (((h)->w0&0x0FFF0000)>>16)
+#define ipv4_get_hdr_fg_off(h) (((h)->w0&0x00000FFF) )
+#define ipv4_get_hdr_dgl(h) (((h)->w1&0xFFFF0000)>>16)
+
+#define ipv4_set_hdr_lf(lf) (( lf)<<30)
+#define ipv4_set_hdr_ether_type(et) (( et) )
+#define ipv4_set_hdr_dg_size(dgs) ((dgs)<<16)
+#define ipv4_set_hdr_fg_off(fgo) ((fgo) )
+
+#define ipv4_set_hdr_dgl(dgl) ((dgl)<<16)
+
+struct ipv4_hdr {
+ u32 w0;
+ u32 w1;
+};
+
+static inline void ipv4_make_uf_hdr( struct ipv4_hdr *hdr, unsigned ether_type) {
+ hdr->w0 = ipv4_set_hdr_lf(IPV4_HDR_UNFRAG)
+ |ipv4_set_hdr_ether_type(ether_type);
+ fw_debug ( "Setting unfragmented header %p to %x\n", hdr, hdr->w0 );
+}
+
+static inline void ipv4_make_ff_hdr ( struct ipv4_hdr *hdr, unsigned ether_type, unsigned dg_size, unsigned dgl ) {
+ hdr->w0 = ipv4_set_hdr_lf(IPV4_HDR_FIRSTFRAG)
+ |ipv4_set_hdr_dg_size(dg_size)
+ |ipv4_set_hdr_ether_type(ether_type);
+ hdr->w1 = ipv4_set_hdr_dgl(dgl);
+ fw_debug ( "Setting fragmented header %p to first_frag %x,%x (et %x, dgs %x, dgl %x)\n", hdr, hdr->w0, hdr->w1,
+ ether_type, dg_size, dgl );
+}
+
+static inline void ipv4_make_sf_hdr ( struct ipv4_hdr *hdr, unsigned lf, unsigned dg_size, unsigned fg_off, unsigned dgl) {
+ hdr->w0 = ipv4_set_hdr_lf(lf)
+ |ipv4_set_hdr_dg_size(dg_size)
+ |ipv4_set_hdr_fg_off(fg_off);
+ hdr->w1 = ipv4_set_hdr_dgl(dgl);
+ fw_debug ( "Setting fragmented header %p to %x,%x (lf %x, dgs %x, fo %x dgl %x)\n",
+ hdr, hdr->w0, hdr->w1,
+ lf, dg_size, fg_off, dgl );
+}
+
+/* End of IP1394 headers */
+
+/* Fragment types */
+#define ETH1394_HDR_LF_UF 0 /* unfragmented */
+#define ETH1394_HDR_LF_FF 1 /* first fragment */
+#define ETH1394_HDR_LF_LF 2 /* last fragment */
+#define ETH1394_HDR_LF_IF 3 /* interior fragment */
+
+#define IP1394_HW_ADDR_LEN 16 /* As per RFC */
+
+/* This list keeps track of what parts of the datagram have been filled in */
+struct ipv4_fragment_info {
+ struct list_head fragment_info;
+ u16 offset;
+ u16 len;
+};
+
+struct ipv4_partial_datagram {
+ struct list_head pdg_list;
+ struct list_head fragment_info;
+ struct sk_buff *skb;
+ /* FIXME Why not use skb->data? */
+ char *pbuf;
+ u16 datagram_label;
+ u16 ether_type;
+ u16 datagram_size;
+};
+
+/*
+ * We keep one of these for each IPv4 capable device attached to a fw_card.
+ * The list of them is stored in the fw_card structure rather than in the
+ * ipv4_priv because the remote IPv4 nodes may be probed before the card is,
+ * so we need a place to store them before the ipv4_priv structure is
+ * allocated.
+ */
+struct ipv4_node {
+ struct list_head ipv4_nodes;
+ /* guid of the remote node */
+ u64 guid;
+ /* FIFO address to transmit datagrams to, or INVALID_FIFO_ADDR */
+ u64 fifo;
+
+ spinlock_t pdg_lock; /* partial datagram lock */
+ /* List of partial datagrams received from this node */
+ struct list_head pdg_list;
+ /* Number of entries in pdg_list at the moment */
+ unsigned pdg_size;
+
+ /* max payload to transmit to this remote node */
+ /* This already includes the IPV4_FRAG_HDR_SIZE overhead */
+ u16 max_payload;
+ /* outgoing datagram label */
+ u16 datagram_label;
+ /* Current node_id of the remote node */
+ u16 nodeid;
+ /* current generation of the remote node */
+ u8 generation;
+ /* max speed that this node can receive at */
+ u8 xmt_speed;
+};
+
+struct ipv4_priv {
+ spinlock_t lock;
+
+ enum ipv4_broadcast_state broadcast_state;
+ struct fw_iso_context *broadcast_rcv_context;
+ struct fw_iso_buffer broadcast_rcv_buffer;
+ void **broadcast_rcv_buffer_ptrs;
+ unsigned broadcast_rcv_next_ptr;
+ unsigned num_broadcast_rcv_ptrs;
+ unsigned rcv_buffer_size;
+ /*
+ * This value is the maximum unfragmented datagram size that can be
+ * sent by the hardware. It already has the GASP overhead and the
+ * unfragmented datagram header overhead calculated into it.
+ */
+ unsigned broadcast_xmt_max_payload;
+ u16 broadcast_xmt_datagramlabel;
+
+ /*
+ * The csr address that remote nodes must send datagrams to for us to
+ * receive them.
+ */
+ struct fw_address_handler handler;
+ u64 local_fifo;
+
+ /* Wake up to xmt */
+ /* struct work_struct wake;*/
+ /* List of packets to be sent */
+ struct list_head packet_list;
+ /*
+ * List of packets that were broadcasted. When we get an ISO interrupt
+ * one of them has been sent
+ */
+ struct list_head broadcasted_list;
+ /* List of packets that have been sent but not yet acked */
+ struct list_head sent_list;
+
+ struct fw_card *card;
+};
+
+/* This is our task struct. It's used for the packet complete callback. */
+struct ipv4_packet_task {
+ /*
+ * ptask can actually be on priv->packet_list, priv->broadcasted_list,
+ * or priv->sent_list depending on its current state.
+ */
+ struct list_head packet_list;
+ struct fw_transaction transaction;
+ struct ipv4_hdr hdr;
+ struct sk_buff *skb;
+ struct ipv4_priv *priv;
+ enum ipv4_tx_type tx_type;
+ int outstanding_pkts;
+ unsigned max_payload;
+ u64 fifo_addr;
+ u16 dest_node;
+ u8 generation;
+ u8 speed;
+};
+
+static struct kmem_cache *ipv4_packet_task_cache;
+
+static const char ipv4_driver_name[] = "firewire-ipv4";
+
+static const struct ieee1394_device_id ipv4_id_table[] = {
+ {
+ .match_flags = IEEE1394_MATCH_SPECIFIER_ID |
+ IEEE1394_MATCH_VERSION,
+ .specifier_id = IPV4_GASP_SPECIFIER_ID,
+ .version = IPV4_GASP_VERSION,
+ },
+ { }
+};
+
+static u32 ipv4_unit_directory_data[] = {
+ 0x00040000, /* unit directory */
+ 0x12000000 | IPV4_GASP_SPECIFIER_ID, /* specifier ID */
+ 0x81000003, /* text descriptor */
+ 0x13000000 | IPV4_GASP_VERSION, /* version */
+ 0x81000005, /* text descriptor */
+
+ 0x00030000, /* Three quadlets */
+ 0x00000000, /* Text */
+ 0x00000000, /* Language 0 */
+ 0x49414e41, /* I A N A */
+ 0x00030000, /* Three quadlets */
+ 0x00000000, /* Text */
+ 0x00000000, /* Language 0 */
+ 0x49507634, /* I P v 4 */
+};
+
+static struct fw_descriptor ipv4_unit_directory = {
+ .length = ARRAY_SIZE(ipv4_unit_directory_data),
+ .key = 0xd1000000,
+ .data = ipv4_unit_directory_data
+};
+
+static int ipv4_send_packet(struct ipv4_packet_task *ptask );
+
+/* ------------------------------------------------------------------ */
+/******************************************
+ * 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 ipv4_header ( struct sk_buff *skb, struct net_device *dev,
+ unsigned short type, const void *daddr,
+ const void *saddr, unsigned len) {
+ struct ipv4_ether_hdr *eth;
+
+ eth = (struct ipv4_ether_hdr *)skb_push(skb, sizeof(*eth));
+ 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 ipv4_rebuild_header(struct sk_buff *skb)
+{
+ struct ipv4_ether_hdr *eth;
+
+ eth = (struct ipv4_ether_hdr *)skb->data;
+ if (eth->h_proto == htons(ETH_P_IP))
+ return arp_find((unsigned char *)&eth->h_dest, skb);
+
+ fw_notify ( "%s: unable to resolve type %04x addresses\n",
+ skb->dev->name,ntohs(eth->h_proto) );
+ return 0;
+}
+
+static int ipv4_header_cache(const struct neighbour *neigh, struct hh_cache *hh) {
+ unsigned short type = hh->hh_type;
+ struct net_device *dev;
+ struct ipv4_ether_hdr *eth;
+
+ if (type == htons(ETH_P_802_3))
+ return -1;
+ dev = neigh->dev;
+ eth = (struct ipv4_ether_hdr *)((u8 *)hh->hh_data + 16 - sizeof(*eth));
+ eth->h_proto = type;
+ memcpy(eth->h_dest, neigh->ha, dev->addr_len);
+
+ hh->hh_len = IPV4_HLEN;
+ return 0;
+}
+
+/* Called by Address Resolution module to notify changes in address. */
+static void ipv4_header_cache_update(struct hh_cache *hh, const struct net_device *dev, const unsigned char * haddr ) {
+ memcpy((u8 *)hh->hh_data + 16 - IPV4_HLEN, haddr, dev->addr_len);
+}
+
+static int ipv4_header_parse(const struct sk_buff *skb, unsigned char *haddr) {
+ memcpy(haddr, skb->dev->dev_addr, IPV4_ALEN);
+ return IPV4_ALEN;
+}
+
+static const struct header_ops ipv4_header_ops = {
+ .create = ipv4_header,
+ .rebuild = ipv4_rebuild_header,
+ .cache = ipv4_header_cache,
+ .cache_update = ipv4_header_cache_update,
+ .parse = ipv4_header_parse,
+};
+
+/* ------------------------------------------------------------------ */
+
+/* FIXME: is this correct for all cases? */
+static bool ipv4_frag_overlap(struct ipv4_partial_datagram *pd, unsigned offset, unsigned len)
+{
+ struct ipv4_fragment_info *fi;
+ unsigned end = offset + len;
+
+ list_for_each_entry(fi, &pd->fragment_info, fragment_info) {
+ if (offset < fi->offset + fi->len && end > fi->offset) {
+ fw_debug ( "frag_overlap pd %p fi %p (%x@%x) with %x@%x\n", pd, fi, fi->len, fi->offset, len, offset );
+ return true;
+ }
+ }
+ fw_debug ( "frag_overlap %p does not overlap with %x@%x\n", pd, len, offset );
+ return false;
+}
+
+/* Assumes that new fragment does not overlap any existing fragments */
+static struct ipv4_fragment_info *ipv4_frag_new ( struct ipv4_partial_datagram *pd, unsigned offset, unsigned len ) {
+ struct ipv4_fragment_info *fi, *fi2, *new;
+ struct list_head *list;
+
+ fw_debug ( "frag_new pd %p %x@%x\n", pd, len, offset );
+ list = &pd->fragment_info;
+ list_for_each_entry(fi, &pd->fragment_info, fragment_info) {
+ if (fi->offset + fi->len == offset) {
+ /* The new fragment can be tacked on to the end */
+ /* Did the new fragment plug a hole? */
+ fi2 = list_entry(fi->fragment_info.next, struct ipv4_fragment_info, fragment_info);
+ if (fi->offset + fi->len == fi2->offset) {
+ fw_debug ( "pd %p: hole filling %p (%x@%x) and %p(%x@%x): now %x@%x\n", pd, fi, fi->len, fi->offset,
+ fi2, fi2->len, fi2->offset, fi->len + len + fi2->len, fi->offset );
+ /* glue fragments together */
+ fi->len += len + fi2->len;
+ list_del(&fi2->fragment_info);
+ kfree(fi2);
+ } else {
+ fw_debug ( "pd %p: extending %p from %x@%x to %x@%x\n", pd, fi, fi->len, fi->offset, fi->len+len, fi->offset );
+ fi->len += len;
+ }
+ return fi;
+ }
+ if (offset + len == fi->offset) {
+ /* The new fragment can be tacked on to the beginning */
+ /* Did the new fragment plug a hole? */
+ fi2 = list_entry(fi->fragment_info.prev, struct ipv4_fragment_info, fragment_info);
+ if (fi2->offset + fi2->len == fi->offset) {
+ /* glue fragments together */
+ fw_debug ( "pd %p: extending %p and merging with %p from %x@%x to %x@%x\n",
+ pd, fi2, fi, fi2->len, fi2->offset, fi2->len + fi->len + len, fi2->offset );
+ fi2->len += fi->len + len;
+ list_del(&fi->fragment_info);
+ kfree(fi);
+ return fi2;
+ }
+ fw_debug ( "pd %p: extending %p from %x@%x to %x@%x\n", pd, fi, fi->len, fi->offset, offset, fi->len + len );
+ fi->offset = offset;
+ fi->len += len;
+ return fi;
+ }
+ if (offset > fi->offset + fi->len) {
+ list = &fi->fragment_info;
+ break;
+ }
+ if (offset + len < fi->offset) {
+ list = fi->fragment_info.prev;
+ break;
+ }
+ }
+
+ new = kmalloc(sizeof(*new), GFP_ATOMIC);
+ if (!new) {
+ fw_error ( "out of memory in fragment handling!\n" );
+ return NULL;
+ }
+
+ new->offset = offset;
+ new->len = len;
+ list_add(&new->fragment_info, list);
+ fw_debug ( "pd %p: new frag %p %x@%x\n", pd, new, new->len, new->offset );
+ list_for_each_entry( fi, &pd->fragment_info, fragment_info )
+ fw_debug ( "fi %p %x@%x\n", fi, fi->len, fi->offset );
+ return new;
+}
+
+/* ------------------------------------------------------------------ */
+
+static struct ipv4_partial_datagram *ipv4_pd_new(struct net_device *netdev,
+ struct ipv4_node *node, u16 datagram_label, unsigned dg_size, u32 *frag_buf,
+ unsigned frag_off, unsigned frag_len) {
+ struct ipv4_partial_datagram *new;
+ struct ipv4_fragment_info *fi;
+
+ new = kmalloc(sizeof(*new), GFP_ATOMIC);
+ if (!new)
+ goto fail;
+ INIT_LIST_HEAD(&new->fragment_info);
+ fi = ipv4_frag_new ( new, frag_off, frag_len);
+ if ( fi == NULL )
+ goto fail_w_new;
+ new->datagram_label = datagram_label;
+ new->datagram_size = dg_size;
+ new->skb = dev_alloc_skb(dg_size + netdev->hard_header_len + 15);
+ if ( new->skb == NULL )
+ goto fail_w_fi;
+ skb_reserve(new->skb, (netdev->hard_header_len + 15) & ~15);
+ new->pbuf = skb_put(new->skb, dg_size);
+ memcpy(new->pbuf + frag_off, frag_buf, frag_len);
+ list_add_tail(&new->pdg_list, &node->pdg_list);
+ fw_debug ( "pd_new: new pd %p { dgl %u, dg_size %u, skb %p, pbuf %p } on node %p\n",
+ new, new->datagram_label, new->datagram_size, new->skb, new->pbuf, node );
+ return new;
+
+fail_w_fi:
+ kfree(fi);
+fail_w_new:
+ kfree(new);
+fail:
+ fw_error("ipv4_pd_new: no memory\n");
+ return NULL;
+}
+
+static struct ipv4_partial_datagram *ipv4_pd_find(struct ipv4_node *node, u16 datagram_label) {
+ struct ipv4_partial_datagram *pd;
+
+ list_for_each_entry(pd, &node->pdg_list, pdg_list) {
+ if ( pd->datagram_label == datagram_label ) {
+ fw_debug ( "pd_find(node %p, label %u): pd %p\n", node, datagram_label, pd );
+ return pd;
+ }
+ }
+ fw_debug ( "pd_find(node %p, label %u) no entry\n", node, datagram_label );
+ return NULL;
+}
+
+
+static void ipv4_pd_delete ( struct ipv4_partial_datagram *old ) {
+ struct ipv4_fragment_info *fi, *n;
+
+ fw_debug ( "pd_delete %p\n", old );
+ list_for_each_entry_safe(fi, n, &old->fragment_info, fragment_info) {
+ fw_debug ( "Freeing fi %p\n", fi );
+ kfree(fi);
+ }
+ list_del(&old->pdg_list);
+ dev_kfree_skb_any(old->skb);
+ kfree(old);
+}
+
+static bool ipv4_pd_update ( struct ipv4_node *node, struct ipv4_partial_datagram *pd,
+ u32 *frag_buf, unsigned frag_off, unsigned frag_len) {
+ fw_debug ( "pd_update node %p, pd %p, frag_buf %p, %x@%x\n", node, pd, frag_buf, frag_len, frag_off );
+ if ( ipv4_frag_new ( pd, frag_off, frag_len ) == NULL)
+ return false;
+ 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_tail(&pd->pdg_list, &node->pdg_list);
+ fw_debug ( "New pd list:\n" );
+ list_for_each_entry ( pd, &node->pdg_list, pdg_list ) {
+ fw_debug ( "pd %p\n", pd );
+ }
+ return true;
+}
+
+static bool ipv4_pd_is_complete ( struct ipv4_partial_datagram *pd ) {
+ struct ipv4_fragment_info *fi;
+ bool ret;
+
+ fi = list_entry(pd->fragment_info.next, struct ipv4_fragment_info, fragment_info);
+
+ ret = (fi->len == pd->datagram_size);
+ fw_debug ( "pd_is_complete (pd %p, dgs %x): fi %p (%x@%x) %s\n", pd, pd->datagram_size, fi, fi->len, fi->offset, ret ? "yes" : "no" );
+ return ret;
+}
+
+/* ------------------------------------------------------------------ */
+
+static int ipv4_node_new ( struct fw_card *card, struct fw_device *device ) {
+ struct ipv4_node *node;
+
+ node = kmalloc ( sizeof(*node), GFP_KERNEL );
+ if ( ! node ) {
+ fw_error ( "allocate new node failed\n" );
+ return -ENOMEM;
+ }
+ node->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4];
+ node->fifo = INVALID_FIFO_ADDR;
+ INIT_LIST_HEAD(&node->pdg_list);
+ spin_lock_init(&node->pdg_lock);
+ node->pdg_size = 0;
+ node->generation = device->generation;
+ rmb();
+ node->nodeid = device->node_id;
+ /* FIXME what should it really be? */
+ node->max_payload = S100_BUFFER_SIZE - IPV4_UNFRAG_HDR_SIZE;
+ node->datagram_label = 0U;
+ node->xmt_speed = device->max_speed;
+ list_add_tail ( &node->ipv4_nodes, &card->ipv4_nodes );
+ fw_debug ( "node_new: %p { guid %016llx, generation %u, nodeid %x, max_payload %x, xmt_speed %x } added\n",
+ node, (unsigned long long)node->guid, node->generation, node->nodeid, node->max_payload, node->xmt_speed );
+ return 0;
+}
+
+static struct ipv4_node *ipv4_node_find_by_guid(struct ipv4_priv *priv, u64 guid) {
+ struct ipv4_node *node;
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ list_for_each_entry(node, &priv->card->ipv4_nodes, ipv4_nodes)
+ if (node->guid == guid) {
+ /* FIXME: lock the node first? */
+ spin_unlock_irqrestore ( &priv->lock, flags );
+ fw_debug ( "node_find_by_guid (%016llx) found %p\n", (unsigned long long)guid, node );
+ return node;
+ }
+
+ spin_unlock_irqrestore ( &priv->lock, flags );
+ fw_debug ( "node_find_by_guid (%016llx) not found\n", (unsigned long long)guid );
+ return NULL;
+}
+
+static struct ipv4_node *ipv4_node_find_by_nodeid(struct ipv4_priv *priv, u16 nodeid) {
+ struct ipv4_node *node;
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ list_for_each_entry(node, &priv->card->ipv4_nodes, ipv4_nodes)
+ if (node->nodeid == nodeid) {
+ /* FIXME: lock the node first? */
+ spin_unlock_irqrestore ( &priv->lock, flags );
+ fw_debug ( "node_find_by_nodeid (%x) found %p\n", nodeid, node );
+ return node;
+ }
+ fw_debug ( "node_find_by_nodeid (%x) not found\n", nodeid );
+ spin_unlock_irqrestore ( &priv->lock, flags );
+ return NULL;
+}
+
+/* This is only complicated because we can't assume priv exists */
+static void ipv4_node_delete ( struct fw_card *card, struct fw_device *device ) {
+ struct net_device *netdev;
+ struct ipv4_priv *priv;
+ struct ipv4_node *node;
+ u64 guid;
+ unsigned long flags;
+ struct ipv4_partial_datagram *pd, *pd_next;
+
+ guid = (u64)device->config_rom[3] << 32 | device->config_rom[4];
+ netdev = card->netdev;
+ if ( netdev )
+ priv = netdev_priv ( netdev );
+ else
+ priv = NULL;
+ if ( priv )
+ spin_lock_irqsave ( &priv->lock, flags );
+ list_for_each_entry( node, &card->ipv4_nodes, ipv4_nodes ) {
+ if ( node->guid == guid ) {
+ list_del ( &node->ipv4_nodes );
+ list_for_each_entry_safe( pd, pd_next, &node->pdg_list, pdg_list )
+ ipv4_pd_delete ( pd );
+ break;
+ }
+ }
+ if ( priv )
+ spin_unlock_irqrestore ( &priv->lock, flags );
+}
+
+/* ------------------------------------------------------------------ */
+
+
+static int ipv4_finish_incoming_packet ( struct net_device *netdev,
+ struct sk_buff *skb, u16 source_node_id, bool is_broadcast, u16 ether_type ) {
+ struct ipv4_priv *priv;
+ static u64 broadcast_hw = ~0ULL;
+ int status;
+ u64 guid;
+
+ fw_debug ( "ipv4_finish_incoming_packet(%p, %p, %x, %s, %x\n",
+ netdev, skb, source_node_id, is_broadcast ? "true" : "false", ether_type );
+ priv = netdev_priv(netdev);
+ /* Write metadata, and then pass to the receive level */
+ skb->dev = netdev;
+ 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, as well as arp
+ * conversion if needed. ARP conversion is easier in this
+ * direction, since we are using ethernet as our backend.
+ */
+ /*
+ * 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 == ETH_P_ARP) {
+ struct ipv4_arp *arp1394;
+ struct arphdr *arp;
+ unsigned char *arp_ptr;
+ u64 fifo_addr;
+ u8 max_rec;
+ u8 sspd;
+ u16 max_payload;
+ struct ipv4_node *node;
+ static const u16 ipv4_speed_to_max_payload[] = {
+ /* S100, S200, S400, S800, S1600, S3200 */
+ 512, 1024, 2048, 4096, 4096, 4096
+ };
+
+ /* fw_debug ( "ARP packet\n" ); */
+ arp1394 = (struct ipv4_arp *)skb->data;
+ arp = (struct arphdr *)skb->data;
+ arp_ptr = (unsigned char *)(arp + 1);
+ fifo_addr = (u64)ntohs(arp1394->fifo_hi) << 32 |
+ ntohl(arp1394->fifo_lo);
+ max_rec = priv->card->max_receive;
+ if ( arp1394->max_rec < max_rec )
+ max_rec = arp1394->max_rec;
+ sspd = arp1394->sspd;
+ /*
+ * Sanity check. MacOSX seems to be sending us 131 in this
+ * field (atleast on my Panther G5). Not sure why.
+ */
+ if (sspd > 5 ) {
+ fw_notify ( "sspd %x out of range\n", sspd );
+ sspd = 0;
+ }
+
+ max_payload = min(ipv4_speed_to_max_payload[sspd],
+ (u16)(1 << (max_rec + 1))) - IPV4_UNFRAG_HDR_SIZE;
+
+ guid = be64_to_cpu(get_unaligned(&arp1394->s_uniq_id));
+ node = ipv4_node_find_by_guid(priv, guid);
+ if (!node) {
+ fw_notify ( "No node for ARP packet from %llx\n", guid );
+ goto failed_proto;
+ }
+ if ( node->nodeid != source_node_id || node->generation != priv->card->generation ) {
+ fw_notify ( "Internal error: node->nodeid (%x) != soucre_node_id (%x) or node->generation (%x) != priv->card->generation(%x)\n",
+ node->nodeid, source_node_id, node->generation, priv->card->generation );
+ node->nodeid = source_node_id;
+ node->generation = priv->card->generation;
+ }
+
+ /* FIXME: for debugging */
+ if ( sspd > SCODE_400 )
+ sspd = SCODE_400;
+ /* Update our speed/payload/fifo_offset table */
+ /*
+ * FIXME: this does not handle cases where two high-speed endpoints must use a slower speed because of
+ * a lower speed hub between them. We need to look at the actual topology map here.
+ */
+ fw_debug ( "Setting node %p fifo %llx (was %llx), max_payload %x (was %x), speed %x (was %x)\n",
+ node, fifo_addr, node->fifo, max_payload, node->max_payload, sspd, node->xmt_speed );
+ node->fifo = fifo_addr;
+ node->max_payload = max_payload;
+ /*
+ * Only allow speeds to go down from their initial value.
+ * Otherwise a local node that can only do S400 or slower may
+ * be told to transmit at S800 to a faster remote node.
+ */
+ if ( node->xmt_speed > sspd )
+ node->xmt_speed = sspd;
+
+ /*
+ * 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, netdev->dev_addr, sizeof(u64));
+ }
+
+ /* Now add the ethernet header. */
+ guid = cpu_to_be64(priv->card->guid);
+ if (dev_hard_header(skb, netdev, ether_type, is_broadcast ? &broadcast_hw : &guid, NULL,
+ skb->len) >= 0) {
+ struct ipv4_ether_hdr *eth;
+ u16 *rawp;
+ __be16 protocol;
+
+ skb_reset_mac_header(skb);
+ skb_pull(skb, sizeof(*eth));
+ eth = ipv4_ether_hdr(skb);
+ if (*eth->h_dest & 1) {
+ if (memcmp(eth->h_dest, netdev->broadcast, netdev->addr_len) == 0) {
+ fw_debug ( "Broadcast\n" );
+ skb->pkt_type = PACKET_BROADCAST;
+ }
+#if 0
+ else
+ skb->pkt_type = PACKET_MULTICAST;
+#endif
+ } else {
+ if (memcmp(eth->h_dest, netdev->dev_addr, netdev->addr_len)) {
+ u64 a1, a2;
+
+ memcpy ( &a1, eth->h_dest, sizeof(u64));
+ memcpy ( &a2, netdev->dev_addr, sizeof(u64));
+ fw_debug ( "Otherhost %llx %llx %x\n", a1, a2, netdev->addr_len );
+ skb->pkt_type = PACKET_OTHERHOST;
+ }
+ }
+ if (ntohs(eth->h_proto) >= 1536) {
+ fw_debug ( " proto %x %x\n", eth->h_proto, ntohs(eth->h_proto) );
+ protocol = eth->h_proto;
+ } else {
+ rawp = (u16 *)skb->data;
+ if (*rawp == 0xFFFF) {
+ fw_debug ( "proto 802_3\n" );
+ protocol = htons(ETH_P_802_3);
+ } else {
+ fw_debug ( "proto 802_2\n" );
+ protocol = htons(ETH_P_802_2);
+ }
+ }
+ skb->protocol = protocol;
+ }
+ status = netif_rx(skb);
+ if ( status == NET_RX_DROP) {
+ netdev->stats.rx_errors++;
+ netdev->stats.rx_dropped++;
+ } else {
+ netdev->stats.rx_packets++;
+ netdev->stats.rx_bytes += skb->len;
+ }
+ if (netif_queue_stopped(netdev))
+ netif_wake_queue(netdev);
+ return 0;
+
+ failed_proto:
+ netdev->stats.rx_errors++;
+ netdev->stats.rx_dropped++;
+ dev_kfree_skb_any(skb);
+ if (netif_queue_stopped(netdev))
+ netif_wake_queue(netdev);
+ netdev->last_rx = jiffies;
+ return 0;
+}
+
+/* ------------------------------------------------------------------ */
+
+static int ipv4_incoming_packet ( struct ipv4_priv *priv, u32 *buf, int len, u16 source_node_id, bool is_broadcast ) {
+ struct sk_buff *skb;
+ struct net_device *netdev;
+ struct ipv4_hdr hdr;
+ unsigned lf;
+ unsigned long flags;
+ struct ipv4_node *node;
+ struct ipv4_partial_datagram *pd;
+ int fg_off;
+ int dg_size;
+ u16 datagram_label;
+ int retval;
+ u16 ether_type;
+
+ fw_debug ( "ipv4_incoming_packet(%p, %p, %d, %x, %s)\n", priv, buf, len, source_node_id, is_broadcast ? "true" : "false" );
+ netdev = priv->card->netdev;
+
+ hdr.w0 = ntohl(buf[0]);
+ lf = ipv4_get_hdr_lf(&hdr);
+ if ( lf == IPV4_HDR_UNFRAG ) {
+ /*
+ * 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.
+ */
+ ether_type = ipv4_get_hdr_ether_type(&hdr);
+ fw_debug ( "header w0 = %x, lf = %x, ether_type = %x\n", hdr.w0, lf, ether_type );
+ buf++;
+ len -= IPV4_UNFRAG_HDR_SIZE;
+
+ skb = dev_alloc_skb(len + netdev->hard_header_len + 15);
+ if (unlikely(!skb)) {
+ fw_error ( "Out of memory for incoming packet\n");
+ netdev->stats.rx_dropped++;
+ return -1;
+ }
+ skb_reserve(skb, (netdev->hard_header_len + 15) & ~15);
+ memcpy(skb_put(skb, len), buf, len );
+ return ipv4_finish_incoming_packet(netdev, skb, source_node_id, is_broadcast, ether_type );
+ }
+ /* A datagram fragment has been received, now the fun begins. */
+ hdr.w1 = ntohl(buf[1]);
+ buf +=2;
+ len -= IPV4_FRAG_HDR_SIZE;
+ if ( lf ==IPV4_HDR_FIRSTFRAG ) {
+ ether_type = ipv4_get_hdr_ether_type(&hdr);
+ fg_off = 0;
+ } else {
+ fg_off = ipv4_get_hdr_fg_off(&hdr);
+ ether_type = 0; /* Shut up compiler! */
+ }
+ datagram_label = ipv4_get_hdr_dgl(&hdr);
+ dg_size = ipv4_get_hdr_dg_size(&hdr); /* ??? + 1 */
+ fw_debug ( "fragmented: %x.%x = lf %x, ether_type %x, fg_off %x, dgl %x, dg_size %x\n", hdr.w0, hdr.w1, lf, ether_type, fg_off, datagram_label, dg_size );
+ node = ipv4_node_find_by_nodeid ( priv, source_node_id);
+ spin_lock_irqsave(&node->pdg_lock, flags);
+ pd = ipv4_pd_find( node, datagram_label );
+ if (pd == NULL) {
+ while ( node->pdg_size >= ipv4_mpd ) {
+ /* remove the oldest */
+ ipv4_pd_delete ( list_first_entry(&node->pdg_list, struct ipv4_partial_datagram, pdg_list) );
+ node->pdg_size--;
+ }
+ pd = ipv4_pd_new ( netdev, node, datagram_label, dg_size,
+ buf, fg_off, len);
+ if ( pd == NULL) {
+ retval = -ENOMEM;
+ goto bad_proto;
+ }
+ node->pdg_size++;
+ } else {
+ if (ipv4_frag_overlap(pd, fg_off, len) || pd->datagram_size != dg_size) {
+ /*
+ * Differing datagram sizes or overlapping fragments,
+ * Either way the remote machine is playing silly buggers
+ * with us: obliterate the old datagram and start a new one.
+ */
+ ipv4_pd_delete ( pd );
+ pd = ipv4_pd_new ( netdev, node, datagram_label,
+ dg_size, buf, fg_off, len);
+ if ( pd == NULL ) {
+ retval = -ENOMEM;
+ node->pdg_size--;
+ goto bad_proto;
+ }
+ } else {
+ bool worked;
+
+ worked = ipv4_pd_update ( node, pd,
+ buf, fg_off, len );
+ if ( ! worked ) {
+ /*
+ * Couldn't save off fragment anyway
+ * so might as well obliterate the
+ * datagram now.
+ */
+ ipv4_pd_delete ( pd );
+ node->pdg_size--;
+ goto bad_proto;
+ }
+ }
+ } /* new datagram or add to existing one */
+
+ if ( lf == IPV4_HDR_FIRSTFRAG )
+ pd->ether_type = ether_type;
+ if ( ipv4_pd_is_complete ( pd ) ) {
+ ether_type = pd->ether_type;
+ node->pdg_size--;
+ skb = skb_get(pd->skb);
+ ipv4_pd_delete ( pd );
+ spin_unlock_irqrestore(&node->pdg_lock, flags);
+ return ipv4_finish_incoming_packet ( netdev, skb, source_node_id, false, ether_type );
+ }
+ /*
+ * Datagram is not complete, we're done for the
+ * moment.
+ */
+ spin_unlock_irqrestore(&node->pdg_lock, flags);
+ return 0;
+
+ bad_proto:
+ spin_unlock_irqrestore(&node->pdg_lock, flags);
+ if (netif_queue_stopped(netdev))
+ netif_wake_queue(netdev);
+ return 0;
+}
+
+static void ipv4_receive_packet ( struct fw_card *card, struct fw_request *r,
+ int tcode, int destination, int source, int generation, int speed,
+ unsigned long long offset, void *payload, size_t length, void *callback_data ) {
+ struct ipv4_priv *priv;
+ int status;
+
+ fw_debug ( "ipv4_receive_packet(%p,%p,%x,%x,%x,%x,%x,%llx,%p,%lx,%p)\n",
+ card, r, tcode, destination, source, generation, speed, offset, payload,
+ (unsigned long)length, callback_data);
+ print_hex_dump ( KERN_DEBUG, "header: ", DUMP_PREFIX_OFFSET, 32, 1, payload, length, false );
+ priv = callback_data;
+ if ( tcode != TCODE_WRITE_BLOCK_REQUEST
+ || destination != card->node_id
+ || generation != card->generation
+ || offset != priv->handler.offset ) {
+ fw_send_response(card, r, RCODE_CONFLICT_ERROR);
+ fw_debug("Conflict error card node_id=%x, card generation=%x, local offset %llx\n",
+ card->node_id, card->generation, (unsigned long long)priv->handler.offset );
+ return;
+ }
+ status = ipv4_incoming_packet ( priv, payload, length, source, false );
+ if ( status != 0 ) {
+ fw_error ( "Incoming packet failure\n" );
+ fw_send_response ( card, r, RCODE_CONFLICT_ERROR );
+ return;
+ }
+ fw_send_response ( card, r, RCODE_COMPLETE );
+}
+
+static void ipv4_receive_broadcast(struct fw_iso_context *context, u32 cycle,
+ size_t header_length, void *header, void *data) {
+ struct ipv4_priv *priv;
+ struct fw_iso_packet packet;
+ struct fw_card *card;
+ u16 *hdr_ptr;
+ u32 *buf_ptr;
+ int retval;
+ u32 length;
+ u16 source_node_id;
+ u32 specifier_id;
+ u32 ver;
+ unsigned long offset;
+ unsigned long flags;
+
+ fw_debug ( "ipv4_receive_broadcast ( context=%p, cycle=%x, header_length=%lx, header=%p, data=%p )\n", context, cycle, (unsigned long)header_length, header, data );
+ print_hex_dump ( KERN_DEBUG, "header: ", DUMP_PREFIX_OFFSET, 32, 1, header, header_length, false );
+ priv = data;
+ card = priv->card;
+ hdr_ptr = header;
+ length = ntohs(hdr_ptr[0]);
+ spin_lock_irqsave(&priv->lock,flags);
+ offset = priv->rcv_buffer_size * priv->broadcast_rcv_next_ptr;
+ buf_ptr = priv->broadcast_rcv_buffer_ptrs[priv->broadcast_rcv_next_ptr++];
+ if ( priv->broadcast_rcv_next_ptr == priv->num_broadcast_rcv_ptrs )
+ priv->broadcast_rcv_next_ptr = 0;
+ spin_unlock_irqrestore(&priv->lock,flags);
+ fw_debug ( "length %u at %p\n", length, buf_ptr );
+ print_hex_dump ( KERN_DEBUG, "buffer: ", DUMP_PREFIX_OFFSET, 32, 1, buf_ptr, length, false );
+
+ specifier_id = (be32_to_cpu(buf_ptr[0]) & 0xffff) << 8
+ | (be32_to_cpu(buf_ptr[1]) & 0xff000000) >> 24;
+ ver = be32_to_cpu(buf_ptr[1]) & 0xFFFFFF;
+ source_node_id = be32_to_cpu(buf_ptr[0]) >> 16;
+ /* fw_debug ( "source %x SpecID %x ver %x\n", source_node_id, specifier_id, ver ); */
+ if ( specifier_id == IPV4_GASP_SPECIFIER_ID && ver == IPV4_GASP_VERSION ) {
+ buf_ptr += 2;
+ length -= IPV4_GASP_OVERHEAD;
+ ipv4_incoming_packet(priv, buf_ptr, length, source_node_id, true);
+ } else
+ fw_debug ( "Ignoring packet: not GASP\n" );
+ packet.payload_length = priv->rcv_buffer_size;
+ packet.interrupt = 1;
+ packet.skip = 0;
+ packet.tag = 3;
+ packet.sy = 0;
+ packet.header_length = IPV4_GASP_OVERHEAD;
+ spin_lock_irqsave(&priv->lock,flags);
+ retval = fw_iso_context_queue ( priv->broadcast_rcv_context, &packet,
+ &priv->broadcast_rcv_buffer, offset );
+ spin_unlock_irqrestore(&priv->lock,flags);
+ if ( retval < 0 )
+ fw_error ( "requeue failed\n" );
+}
+
+static void debug_ptask ( struct ipv4_packet_task *ptask ) {
+ static const char *tx_types[] = { "Unknown", "GASP", "Write" };
+
+ fw_debug ( "packet %p { hdr { w0 %x w1 %x }, skb %p, priv %p,"
+ " tx_type %s, outstanding_pkts %d, max_payload %x, fifo %llx,"
+ " speed %x, dest_node %x, generation %x }\n",
+ ptask, ptask->hdr.w0, ptask->hdr.w1, ptask->skb, ptask->priv,
+ ptask->tx_type > IPV4_WRREQ ? "Invalid" : tx_types[ptask->tx_type],
+ ptask->outstanding_pkts, ptask->max_payload,
+ ptask->fifo_addr, ptask->speed, ptask->dest_node, ptask->generation );
+ print_hex_dump ( KERN_DEBUG, "packet :", DUMP_PREFIX_OFFSET, 32, 1,
+ ptask->skb->data, ptask->skb->len, false );
+}
+
+static void ipv4_transmit_packet_done ( struct ipv4_packet_task *ptask ) {
+ struct ipv4_priv *priv;
+ unsigned long flags;
+
+ priv = ptask->priv;
+ spin_lock_irqsave ( &priv->lock, flags );
+ list_del ( &ptask->packet_list );
+ spin_unlock_irqrestore ( &priv->lock, flags );
+ ptask->outstanding_pkts--;
+ if ( ptask->outstanding_pkts > 0 ) {
+ u16 dg_size;
+ u16 fg_off;
+ u16 datagram_label;
+ u16 lf;
+ struct sk_buff *skb;
+
+ /* Update the ptask to point to the next fragment and send it */
+ lf = ipv4_get_hdr_lf(&ptask->hdr);
+ switch (lf) {
+ case IPV4_HDR_LASTFRAG:
+ case IPV4_HDR_UNFRAG:
+ default:
+ fw_error ( "Outstanding packet %x lf %x, header %x,%x\n", ptask->outstanding_pkts, lf, ptask->hdr.w0, ptask->hdr.w1 );
+ BUG();
+
+ case IPV4_HDR_FIRSTFRAG:
+ /* Set frag type here for future interior fragments */
+ dg_size = ipv4_get_hdr_dg_size(&ptask->hdr);
+ fg_off = ptask->max_payload - IPV4_FRAG_HDR_SIZE;
+ datagram_label = ipv4_get_hdr_dgl(&ptask->hdr);
+ break;
+
+ case IPV4_HDR_INTFRAG:
+ dg_size = ipv4_get_hdr_dg_size(&ptask->hdr);
+ fg_off = ipv4_get_hdr_fg_off(&ptask->hdr) + ptask->max_payload - IPV4_FRAG_HDR_SIZE;
+ datagram_label = ipv4_get_hdr_dgl(&ptask->hdr);
+ break;
+ }
+ skb = ptask->skb;
+ skb_pull ( skb, ptask->max_payload );
+ if ( ptask->outstanding_pkts > 1 ) {
+ ipv4_make_sf_hdr ( &ptask->hdr,
+ IPV4_HDR_INTFRAG, dg_size, fg_off, datagram_label );
+ } else {
+ ipv4_make_sf_hdr ( &ptask->hdr,
+ IPV4_HDR_LASTFRAG, dg_size, fg_off, datagram_label );
+ ptask->max_payload = skb->len + IPV4_FRAG_HDR_SIZE;
+
+ }
+ ipv4_send_packet ( ptask );
+ } else {
+ dev_kfree_skb_any ( ptask->skb );
+ kmem_cache_free( ipv4_packet_task_cache, ptask );
+ }
+}
+
+static void ipv4_write_complete ( struct fw_card *card, int rcode,
+ void *payload, size_t length, void *data ) {
+ struct ipv4_packet_task *ptask;
+
+ ptask = data;
+ fw_debug ( "ipv4_write_complete ( %p, %x, %p, %lx, %p )\n",
+ card, rcode, payload, (unsigned long)length, data );
+ debug_ptask ( ptask );
+
+ if ( rcode == RCODE_COMPLETE ) {
+ ipv4_transmit_packet_done ( ptask );
+ } else {
+ fw_error ( "ipv4_write_complete: failed: %x\n", rcode );
+ /* ??? error recovery */
+ }
+}
+
+static int ipv4_send_packet ( struct ipv4_packet_task *ptask ) {
+ struct ipv4_priv *priv;
+ unsigned tx_len;
+ struct ipv4_hdr *bufhdr;
+ unsigned long flags;
+ struct net_device *netdev;
+#if 0 /* stefanr */
+ int retval;
+#endif
+
+ fw_debug ( "ipv4_send_packet\n" );
+ debug_ptask ( ptask );
+ priv = ptask->priv;
+ tx_len = ptask->max_payload;
+ switch (ipv4_get_hdr_lf(&ptask->hdr)) {
+ case IPV4_HDR_UNFRAG:
+ bufhdr = (struct ipv4_hdr *)skb_push(ptask->skb, IPV4_UNFRAG_HDR_SIZE);
+ bufhdr->w0 = htonl(ptask->hdr.w0);
+ break;
+
+ case IPV4_HDR_FIRSTFRAG:
+ case IPV4_HDR_INTFRAG:
+ case IPV4_HDR_LASTFRAG:
+ bufhdr = (struct ipv4_hdr *)skb_push(ptask->skb, IPV4_FRAG_HDR_SIZE);
+ bufhdr->w0 = htonl(ptask->hdr.w0);
+ bufhdr->w1 = htonl(ptask->hdr.w1);
+ break;
+
+ default:
+ BUG();
+ }
+ if ( ptask->tx_type == IPV4_GASP ) {
+ u32 *packets;
+ int generation;
+ int nodeid;
+
+ /* ptask->generation may not have been set yet */
+ generation = priv->card->generation;
+ smp_rmb();
+ nodeid = priv->card->node_id;
+ packets = (u32 *)skb_push(ptask->skb, sizeof(u32)*2);
+ packets[0] = htonl(nodeid << 16 | (IPV4_GASP_SPECIFIER_ID>>8));
+ packets[1] = htonl((IPV4_GASP_SPECIFIER_ID & 0xFF) << 24 | IPV4_GASP_VERSION);
+ fw_send_request ( priv->card, &ptask->transaction, TCODE_STREAM_DATA,
+ fw_stream_packet_destination_id(3, BROADCAST_CHANNEL, 0),
+ generation, SCODE_100, 0ULL, ptask->skb->data, tx_len + 8, ipv4_write_complete, ptask );
+ spin_lock_irqsave(&priv->lock,flags);
+ list_add_tail ( &ptask->packet_list, &priv->broadcasted_list );
+ spin_unlock_irqrestore(&priv->lock,flags);
+#if 0 /* stefanr */
+ return retval;
+#else
+ return 0;
+#endif
+ }
+ fw_debug("send_request (%p, %p, WRITE_BLOCK, %x, %x, %x, %llx, %p, %d, %p, %p\n",
+ priv->card, &ptask->transaction, ptask->dest_node, ptask->generation,
+ ptask->speed, (unsigned long long)ptask->fifo_addr, ptask->skb->data, tx_len,
+ ipv4_write_complete, ptask );
+ fw_send_request ( priv->card, &ptask->transaction,
+ TCODE_WRITE_BLOCK_REQUEST, ptask->dest_node, ptask->generation, ptask->speed,
+ ptask->fifo_addr, ptask->skb->data, tx_len, ipv4_write_complete, ptask );
+ spin_lock_irqsave(&priv->lock,flags);
+ list_add_tail ( &ptask->packet_list, &priv->sent_list );
+ spin_unlock_irqrestore(&priv->lock,flags);
+ netdev = priv->card->netdev;
+ netdev->trans_start = jiffies;
+ return 0;
+}
+
+static int ipv4_broadcast_start ( struct ipv4_priv *priv ) {
+ struct fw_iso_context *context;
+ int retval;
+ unsigned num_packets;
+ unsigned max_receive;
+ struct fw_iso_packet packet;
+ unsigned long offset;
+ unsigned u;
+ /* unsigned transmit_speed; */
+
+#if 0 /* stefanr */
+ if ( priv->card->broadcast_channel != (BROADCAST_CHANNEL_VALID|BROADCAST_CHANNEL_INITIAL)) {
+ fw_notify ( "Invalid broadcast channel %x\n", priv->card->broadcast_channel );
+ /* FIXME: try again later? */
+ /* return -EINVAL; */
+ }
+#endif
+ if ( priv->local_fifo == INVALID_FIFO_ADDR ) {
+ struct fw_address_region region;
+
+ priv->handler.length = FIFO_SIZE;
+ priv->handler.address_callback = ipv4_receive_packet;
+ priv->handler.callback_data = priv;
+ /* FIXME: this is OHCI, but what about others? */
+ region.start = 0xffff00000000ULL;
+ region.end = 0xfffffffffffcULL;
+
+ retval = fw_core_add_address_handler ( &priv->handler, &region );
+ if ( retval < 0 )
+ goto failed_initial;
+ priv->local_fifo = priv->handler.offset;
+ }
+
+ /*
+ * FIXME: rawiso limits us to PAGE_SIZE. This only matters if we ever have
+ * a machine with PAGE_SIZE < 4096
+ */
+ max_receive = 1U << (priv->card->max_receive + 1);
+ num_packets = ( ipv4_iso_page_count * PAGE_SIZE ) / max_receive;
+ if ( ! priv->broadcast_rcv_context ) {
+ void **ptrptr;
+
+ context = fw_iso_context_create ( priv->card,
+ FW_ISO_CONTEXT_RECEIVE, BROADCAST_CHANNEL,
+ priv->card->link_speed, 8, ipv4_receive_broadcast, priv );
+ if (IS_ERR(context)) {
+ retval = PTR_ERR(context);
+ goto failed_context_create;
+ }
+ retval = fw_iso_buffer_init ( &priv->broadcast_rcv_buffer,
+ priv->card, ipv4_iso_page_count, DMA_FROM_DEVICE );
+ if ( retval < 0 )
+ goto failed_buffer_init;
+ ptrptr = kmalloc ( sizeof(void*)*num_packets, GFP_KERNEL );
+ if ( ! ptrptr ) {
+ retval = -ENOMEM;
+ goto failed_ptrs_alloc;
+ }
+ priv->broadcast_rcv_buffer_ptrs = ptrptr;
+ for ( u = 0; u < ipv4_iso_page_count; u++ ) {
+ void *ptr;
+ unsigned v;
+
+ ptr = kmap ( priv->broadcast_rcv_buffer.pages[u] );
+ for ( v = 0; v < num_packets / ipv4_iso_page_count; v++ )
+ *ptrptr++ = (void *)((char *)ptr + v * max_receive);
+ }
+ priv->broadcast_rcv_context = context;
+ } else
+ context = priv->broadcast_rcv_context;
+
+ packet.payload_length = max_receive;
+ packet.interrupt = 1;
+ packet.skip = 0;
+ packet.tag = 3;
+ packet.sy = 0;
+ packet.header_length = IPV4_GASP_OVERHEAD;
+ offset = 0;
+ for ( u = 0; u < num_packets; u++ ) {
+ retval = fw_iso_context_queue ( context, &packet,
+ &priv->broadcast_rcv_buffer, offset );
+ if ( retval < 0 )
+ goto failed_rcv_queue;
+ offset += max_receive;
+ }
+ priv->num_broadcast_rcv_ptrs = num_packets;
+ priv->rcv_buffer_size = max_receive;
+ priv->broadcast_rcv_next_ptr = 0U;
+ retval = fw_iso_context_start ( context, -1, 0, FW_ISO_CONTEXT_MATCH_ALL_TAGS ); /* ??? sync */
+ if ( retval < 0 )
+ goto failed_rcv_queue;
+ /* FIXME: adjust this when we know the max receive speeds of all other IP nodes on the bus. */
+ /* since we only xmt at S100 ??? */
+ priv->broadcast_xmt_max_payload = S100_BUFFER_SIZE - IPV4_GASP_OVERHEAD - IPV4_UNFRAG_HDR_SIZE;
+ priv->broadcast_state = IPV4_BROADCAST_RUNNING;
+ return 0;
+
+ failed_rcv_queue:
+ kfree ( priv->broadcast_rcv_buffer_ptrs );
+ priv->broadcast_rcv_buffer_ptrs = NULL;
+ failed_ptrs_alloc:
+ fw_iso_buffer_destroy ( &priv->broadcast_rcv_buffer, priv->card );
+ failed_buffer_init:
+ fw_iso_context_destroy ( context );
+ priv->broadcast_rcv_context = NULL;
+ failed_context_create:
+ fw_core_remove_address_handler ( &priv->handler );
+ failed_initial:
+ priv->local_fifo = INVALID_FIFO_ADDR;
+ return retval;
+}
+
+/* This is called after an "ifup" */
+static int ipv4_open(struct net_device *dev) {
+ struct ipv4_priv *priv;
+ int ret;
+
+ priv = netdev_priv(dev);
+ if (priv->broadcast_state == IPV4_BROADCAST_ERROR) {
+ ret = ipv4_broadcast_start ( priv );
+ if (ret)
+ return ret;
+ }
+ netif_start_queue(dev);
+ return 0;
+}
+
+/* This is called after an "ifdown" */
+static int ipv4_stop(struct net_device *netdev)
+{
+ /* flush priv->wake */
+ /* flush_scheduled_work(); */
+
+ netif_stop_queue(netdev);
+ return 0;
+}
+
+/* Transmit a packet (called by kernel) */
+static int ipv4_tx(struct sk_buff *skb, struct net_device *netdev)
+{
+ struct ipv4_ether_hdr hdr_buf;
+ struct ipv4_priv *priv = netdev_priv(netdev);
+ __be16 proto;
+ u16 dest_node;
+ enum ipv4_tx_type tx_type;
+ unsigned max_payload;
+ u16 dg_size;
+ u16 *datagram_label_ptr;
+ struct ipv4_packet_task *ptask;
+ struct ipv4_node *node = NULL;
+
+ ptask = kmem_cache_alloc(ipv4_packet_task_cache, GFP_ATOMIC);
+ if (ptask == NULL)
+ goto fail;
+
+ skb = skb_share_check(skb, GFP_ATOMIC);
+ if (!skb)
+ goto fail;
+
+ /*
+ * Get rid of the fake ipv4 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, sizeof(hdr_buf));
+
+ proto = hdr_buf.h_proto;
+ dg_size = skb->len;
+
+ /*
+ * Set the transmission type for the packet. ARP packets and IP
+ * broadcast packets are sent via GASP.
+ */
+ if ( memcmp(hdr_buf.h_dest, netdev->broadcast, IPV4_ALEN) == 0
+ || proto == htons(ETH_P_ARP)
+ || ( proto == htons(ETH_P_IP)
+ && IN_MULTICAST(ntohl(ip_hdr(skb)->daddr)) ) ) {
+ /* fw_debug ( "transmitting arp or multicast packet\n" );*/
+ tx_type = IPV4_GASP;
+ dest_node = ALL_NODES;
+ max_payload = priv->broadcast_xmt_max_payload;
+ /* BUG_ON(max_payload < S100_BUFFER_SIZE - IPV4_GASP_OVERHEAD); */
+ datagram_label_ptr = &priv->broadcast_xmt_datagramlabel;
+ ptask->fifo_addr = INVALID_FIFO_ADDR;
+ ptask->generation = 0U;
+ ptask->dest_node = 0U;
+ ptask->speed = 0;
+ } else {
+ __be64 guid = get_unaligned((u64 *)hdr_buf.h_dest);
+ u8 generation;
+
+ node = ipv4_node_find_by_guid(priv, be64_to_cpu(guid));
+ if (!node) {
+ fw_debug ( "Normal packet but no node\n" );
+ goto fail;
+ }
+
+ if (node->fifo == INVALID_FIFO_ADDR) {
+ fw_debug ( "Normal packet but no fifo addr\n" );
+ goto fail;
+ }
+
+ /* fw_debug ( "Transmitting normal packet to %x at %llxx\n", node->nodeid, node->fifo ); */
+ generation = node->generation;
+ dest_node = node->nodeid;
+ max_payload = node->max_payload;
+ /* BUG_ON(max_payload < S100_BUFFER_SIZE - IPV4_FRAG_HDR_SIZE); */
+
+ datagram_label_ptr = &node->datagram_label;
+ tx_type = IPV4_WRREQ;
+ ptask->fifo_addr = node->fifo;
+ ptask->generation = generation;
+ ptask->dest_node = dest_node;
+ ptask->speed = node->xmt_speed;
+ }
+
+ /* If this is an ARP packet, convert it */
+ if (proto == htons(ETH_P_ARP)) {
+ /* 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.
+ */
+ struct arphdr *arp = (struct arphdr *)skb->data;
+ unsigned char *arp_ptr = (unsigned char *)(arp + 1);
+ struct ipv4_arp *arp1394 = (struct ipv4_arp *)skb->data;
+ u32 ipaddr;
+
+ ipaddr = *(u32*)(arp_ptr + IPV4_ALEN);
+ arp1394->hw_addr_len = 16;
+ arp1394->max_rec = priv->card->max_receive;
+ arp1394->sspd = priv->card->link_speed;
+ arp1394->fifo_hi = htons(priv->local_fifo >> 32);
+ arp1394->fifo_lo = htonl(priv->local_fifo & 0xFFFFFFFF);
+ arp1394->sip = ipaddr;
+ }
+ if ( ipv4_max_xmt && max_payload > ipv4_max_xmt )
+ max_payload = ipv4_max_xmt;
+
+ ptask->hdr.w0 = 0;
+ ptask->hdr.w1 = 0;
+ ptask->skb = skb;
+ ptask->priv = priv;
+ ptask->tx_type = tx_type;
+ /* Does it all fit in one packet? */
+ if ( dg_size <= max_payload ) {
+ ipv4_make_uf_hdr(&ptask->hdr, be16_to_cpu(proto));
+ ptask->outstanding_pkts = 1;
+ max_payload = dg_size + IPV4_UNFRAG_HDR_SIZE;
+ } else {
+ u16 datagram_label;
+
+ max_payload -= IPV4_FRAG_OVERHEAD;
+ datagram_label = (*datagram_label_ptr)++;
+ ipv4_make_ff_hdr(&ptask->hdr, be16_to_cpu(proto), dg_size, datagram_label );
+ ptask->outstanding_pkts = DIV_ROUND_UP(dg_size, max_payload);
+ max_payload += IPV4_FRAG_HDR_SIZE;
+ }
+ ptask->max_payload = max_payload;
+ ipv4_send_packet ( ptask );
+ return NETDEV_TX_OK;
+
+ fail:
+ if (ptask)
+ kmem_cache_free(ipv4_packet_task_cache, ptask);
+
+ if (skb != NULL)
+ dev_kfree_skb(skb);
+
+ netdev->stats.tx_dropped++;
+ netdev->stats.tx_errors++;
+
+ /*
+ * 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_OK;
+}
+
+/*
+ * 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 ipv4_tx_timeout(struct net_device *dev) {
+ struct ipv4_priv *priv;
+
+ priv = netdev_priv(dev);
+ fw_error ( "%s: Timeout, resetting host\n", dev->name );
+#if 0 /* stefanr */
+ fw_core_initiate_bus_reset ( priv->card, 1 );
+#endif
+}
+
+static int ipv4_change_mtu ( struct net_device *dev, int new_mtu ) {
+#if 0
+ int max_mtu;
+ struct ipv4_priv *priv;
+#endif
+
+ if (new_mtu < 68)
+ return -EINVAL;
+
+#if 0
+ priv = netdev_priv(dev);
+ /* This is not actually true because we can fragment packets at the firewire layer */
+ max_mtu = (1 << (priv->card->max_receive + 1))
+ - sizeof(struct ipv4_hdr) - IPV4_GASP_OVERHEAD;
+ if (new_mtu > max_mtu) {
+ fw_notify ( "%s: Local node constrains MTU to %d\n", dev->name, max_mtu);
+ return -ERANGE;
+ }
+#endif
+ dev->mtu = new_mtu;
+ return 0;
+}
+
+static void ipv4_get_drvinfo(struct net_device *dev,
+struct ethtool_drvinfo *info) {
+ strcpy(info->driver, ipv4_driver_name);
+ strcpy(info->bus_info, "ieee1394"); /* FIXME provide more detail? */
+}
+
+static struct ethtool_ops ipv4_ethtool_ops = {
+ .get_drvinfo = ipv4_get_drvinfo,
+};
+
+static const struct net_device_ops ipv4_netdev_ops = {
+ .ndo_open = ipv4_open,
+ .ndo_stop = ipv4_stop,
+ .ndo_start_xmit = ipv4_tx,
+ .ndo_tx_timeout = ipv4_tx_timeout,
+ .ndo_change_mtu = ipv4_change_mtu,
+};
+
+static void ipv4_init_dev ( struct net_device *dev ) {
+ dev->header_ops = &ipv4_header_ops;
+ dev->netdev_ops = &ipv4_netdev_ops;
+ SET_ETHTOOL_OPS(dev, &ipv4_ethtool_ops);
+
+ dev->watchdog_timeo = IPV4_TIMEOUT;
+ dev->flags = IFF_BROADCAST | IFF_MULTICAST;
+ dev->features = NETIF_F_HIGHDMA;
+ dev->addr_len = IPV4_ALEN;
+ dev->hard_header_len = IPV4_HLEN;
+ dev->type = ARPHRD_IEEE1394;
+
+ /* FIXME: This value was copied from ether_setup(). Is it too much? */
+ dev->tx_queue_len = 1000;
+}
+
+static int ipv4_probe ( struct device *dev ) {
+ struct fw_unit * unit;
+ struct fw_device *device;
+ struct fw_card *card;
+ struct net_device *netdev;
+ struct ipv4_priv *priv;
+ unsigned max_mtu;
+ __be64 guid;
+
+ fw_debug("ipv4 Probing\n" );
+ unit = fw_unit ( dev );
+ device = fw_device ( unit->device.parent );
+ card = device->card;
+
+ if ( ! device->is_local ) {
+ int added;
+
+ fw_debug ( "Non-local, adding remote node entry\n" );
+ added = ipv4_node_new ( card, device );
+ return added;
+ }
+ fw_debug("ipv4 Local: adding netdev\n" );
+ netdev = alloc_netdev ( sizeof(*priv), "fw-ipv4-%d", ipv4_init_dev );
+ if ( netdev == NULL) {
+ fw_error( "Out of memory\n");
+ goto out;
+ }
+
+ SET_NETDEV_DEV(netdev, card->device);
+ priv = netdev_priv(netdev);
+
+ spin_lock_init(&priv->lock);
+ priv->broadcast_state = IPV4_BROADCAST_ERROR;
+ priv->broadcast_rcv_context = NULL;
+ priv->broadcast_xmt_max_payload = 0;
+ priv->broadcast_xmt_datagramlabel = 0;
+
+ priv->local_fifo = INVALID_FIFO_ADDR;
+
+ /* INIT_WORK(&priv->wake, ipv4_handle_queue);*/
+ INIT_LIST_HEAD(&priv->packet_list);
+ INIT_LIST_HEAD(&priv->broadcasted_list);
+ INIT_LIST_HEAD(&priv->sent_list );
+
+ priv->card = card;
+
+ /*
+ * Use the RFC 2734 default 1500 octets or the maximum payload
+ * as initial MTU
+ */
+ max_mtu = (1 << (card->max_receive + 1))
+ - sizeof(struct ipv4_hdr) - IPV4_GASP_OVERHEAD;
+ netdev->mtu = min(1500U, max_mtu);
+
+ /* Set our hardware address while we're at it */
+ guid = cpu_to_be64(card->guid);
+ memcpy(netdev->dev_addr, &guid, sizeof(u64));
+ memset(netdev->broadcast, 0xff, sizeof(u64));
+ if ( register_netdev ( netdev ) ) {
+ fw_error ( "Cannot register the driver\n");
+ goto out;
+ }
+
+ fw_notify ( "%s: IPv4 over Firewire on device %016llx\n",
+ netdev->name, card->guid );
+ card->netdev = netdev;
+
+ return 0 /* ipv4_new_node ( ud ) */;
+ out:
+ if ( netdev )
+ free_netdev ( netdev );
+ return -ENOENT;
+}
+
+
+static int ipv4_remove ( struct device *dev ) {
+ struct fw_unit * unit;
+ struct fw_device *device;
+ struct fw_card *card;
+ struct net_device *netdev;
+ struct ipv4_priv *priv;
+ struct ipv4_node *node;
+ struct ipv4_partial_datagram *pd, *pd_next;
+ struct ipv4_packet_task *ptask, *pt_next;
+
+ fw_debug("ipv4 Removing\n" );
+ unit = fw_unit ( dev );
+ device = fw_device ( unit->device.parent );
+ card = device->card;
+
+ if ( ! device->is_local ) {
+ fw_debug ( "Node %x is non-local, removing remote node entry\n", device->node_id );
+ ipv4_node_delete ( card, device );
+ return 0;
+ }
+ netdev = card->netdev;
+ if ( netdev ) {
+ fw_debug ( "Node %x is local: deleting netdev\n", device->node_id );
+ priv = netdev_priv ( netdev );
+ unregister_netdev ( netdev );
+ fw_debug ( "unregistered\n" );
+ if ( priv->local_fifo != INVALID_FIFO_ADDR )
+ fw_core_remove_address_handler ( &priv->handler );
+ fw_debug ( "address handler gone\n" );
+ if ( priv->broadcast_rcv_context ) {
+ fw_iso_context_stop ( priv->broadcast_rcv_context );
+ fw_iso_buffer_destroy ( &priv->broadcast_rcv_buffer, priv->card );
+ fw_iso_context_destroy ( priv->broadcast_rcv_context );
+ fw_debug ( "rcv stopped\n" );
+ }
+ list_for_each_entry_safe( ptask, pt_next, &priv->packet_list, packet_list ) {
+ dev_kfree_skb_any ( ptask->skb );
+ kmem_cache_free( ipv4_packet_task_cache, ptask );
+ }
+ list_for_each_entry_safe( ptask, pt_next, &priv->broadcasted_list, packet_list ) {
+ dev_kfree_skb_any ( ptask->skb );
+ kmem_cache_free( ipv4_packet_task_cache, ptask );
+ }
+ list_for_each_entry_safe( ptask, pt_next, &priv->sent_list, packet_list ) {
+ dev_kfree_skb_any ( ptask->skb );
+ kmem_cache_free( ipv4_packet_task_cache, ptask );
+ }
+ fw_debug ( "lists emptied\n" );
+ list_for_each_entry( node, &card->ipv4_nodes, ipv4_nodes ) {
+ if ( node->pdg_size ) {
+ list_for_each_entry_safe( pd, pd_next, &node->pdg_list, pdg_list )
+ ipv4_pd_delete ( pd );
+ node->pdg_size = 0;
+ }
+ node->fifo = INVALID_FIFO_ADDR;
+ }
+ fw_debug ( "nodes cleaned up\n" );
+ free_netdev ( netdev );
+ card->netdev = NULL;
+ fw_debug ( "done\n" );
+ }
+ return 0;
+}
+
+static void ipv4_update ( struct fw_unit *unit ) {
+ struct fw_device *device;
+ struct fw_card *card;
+
+ fw_debug ( "ipv4_update unit %p\n", unit );
+ device = fw_device ( unit->device.parent );
+ card = device->card;
+ if ( ! device->is_local ) {
+ struct ipv4_node *node;
+ u64 guid;
+ struct net_device *netdev;
+ struct ipv4_priv *priv;
+
+ netdev = card->netdev;
+ if ( netdev ) {
+ priv = netdev_priv ( netdev );
+ guid = (u64)device->config_rom[3] << 32 | device->config_rom[4];
+ node = ipv4_node_find_by_guid ( priv, guid );
+ if ( ! node ) {
+ fw_error ( "ipv4_update: no node for device %llx\n", guid );
+ return;
+ }
+ fw_debug ( "Non-local, updating remote node entry for guid %llx old generation %x, old nodeid %x\n", guid, node->generation, node->nodeid );
+ node->generation = device->generation;
+ rmb();
+ node->nodeid = device->node_id;
+ fw_debug ( "New generation %x, new nodeid %x\n", node->generation, node->nodeid );
+ } else
+ fw_error ( "nonlocal, but no netdev? How can that be?\n" );
+ } else {
+ /* FIXME: What do we need to do on bus reset? */
+ fw_debug ( "Local, doing nothing\n" );
+ }
+}
+
+static struct fw_driver ipv4_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = ipv4_driver_name,
+ .bus = &fw_bus_type,
+ .probe = ipv4_probe,
+ .remove = ipv4_remove,
+ },
+ .update = ipv4_update,
+ .id_table = ipv4_id_table,
+};
+
+static int __init ipv4_init ( void ) {
+ int added;
+
+ added = fw_core_add_descriptor ( &ipv4_unit_directory );
+ if ( added < 0 )
+ fw_error ( "Failed to add descriptor" );
+ ipv4_packet_task_cache = kmem_cache_create("packet_task",
+ sizeof(struct ipv4_packet_task), 0, 0, NULL);
+ fw_debug("Adding ipv4 module\n" );
+ return driver_register ( &ipv4_driver.driver );
+}
+
+static void __exit ipv4_cleanup ( void ) {
+ fw_core_remove_descriptor ( &ipv4_unit_directory );
+ fw_debug("Removing ipv4 module\n" );
+ driver_unregister ( &ipv4_driver.driver );
+}
+
+module_init(ipv4_init);
+module_exit(ipv4_cleanup);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-17 01:49:23 +0000