1c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason/* 2c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * IPv4 over IEEE 1394, per RFC 2734 3c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * 4c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * Copyright (C) 2009 Jay Fenlason <fenlason@redhat.com> 5c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * 6c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * based on eth1394 by Ben Collins et al 7c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason */ 8c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 9f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter#include <linux/bug.h> 10bf337b15c28ae25904a73e7e2e0de2f9c4f0e9f8August Lilleaas#include <linux/compiler.h> 1148553011cea504796e513350740781ac6745f556Stefan Richter#include <linux/delay.h> 12c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason#include <linux/device.h> 13c16714704bb35165e5b85d927873dcc643772648Stefan Richter#include <linux/ethtool.h> 14c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason#include <linux/firewire.h> 15c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason#include <linux/firewire-constants.h> 16c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason#include <linux/highmem.h> 17c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason#include <linux/in.h> 18c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason#include <linux/ip.h> 19f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter#include <linux/jiffies.h> 20c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason#include <linux/mod_devicetable.h> 21c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason#include <linux/module.h> 22c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason#include <linux/moduleparam.h> 235a124d382ea5c97be43c779e4f481455e0287654Stefan Richter#include <linux/mutex.h> 24c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason#include <linux/netdevice.h> 25c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason#include <linux/skbuff.h> 265a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 275a124d382ea5c97be43c779e4f481455e0287654Stefan Richter#include <linux/spinlock.h> 28c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 29c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason#include <asm/unaligned.h> 30c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason#include <net/arp.h> 31c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 32b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter/* rx limits */ 33b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter#define FWNET_MAX_FRAGMENTS 30 /* arbitrary, > TX queue depth */ 34b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter#define FWNET_ISO_PAGE_COUNT (PAGE_SIZE < 16*1024 ? 4 : 2) 35b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter 36b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter/* tx limits */ 37b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter#define FWNET_MAX_QUEUED_DATAGRAMS 20 /* < 64 = number of tlabels */ 38b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter#define FWNET_MIN_QUEUED_DATAGRAMS 10 /* should keep AT DMA busy enough */ 39b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter#define FWNET_TX_QUEUE_LEN FWNET_MAX_QUEUED_DATAGRAMS /* ? */ 40c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 41f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter#define IEEE1394_BROADCAST_CHANNEL 31 42f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter#define IEEE1394_ALL_NODES (0xffc0 | 0x003f) 43f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter#define IEEE1394_MAX_PAYLOAD_S100 512 44f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter#define FWNET_NO_FIFO_ADDR (~0ULL) 45c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 46f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter#define IANA_SPECIFIER_ID 0x00005eU 47f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter#define RFC2734_SW_VERSION 0x000001U 48c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 49f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter#define IEEE1394_GASP_HDR_SIZE 8 50c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 51f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter#define RFC2374_UNFRAG_HDR_SIZE 4 52f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter#define RFC2374_FRAG_HDR_SIZE 8 53f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter#define RFC2374_FRAG_OVERHEAD 4 54c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 55f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter#define RFC2374_HDR_UNFRAG 0 /* unfragmented */ 56f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter#define RFC2374_HDR_FIRSTFRAG 1 /* first fragment */ 57f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter#define RFC2374_HDR_LASTFRAG 2 /* last fragment */ 58f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter#define RFC2374_HDR_INTFRAG 3 /* interior fragment */ 59c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 60f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter#define RFC2734_HW_ADDR_LEN 16 61c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 62f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstruct rfc2734_arp { 63f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter __be16 hw_type; /* 0x0018 */ 64f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter __be16 proto_type; /* 0x0806 */ 65f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter u8 hw_addr_len; /* 16 */ 66f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter u8 ip_addr_len; /* 4 */ 67f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter __be16 opcode; /* ARP Opcode */ 68f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter /* Above is exactly the same format as struct arphdr */ 69c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 70f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter __be64 s_uniq_id; /* Sender's 64bit EUI */ 71f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter u8 max_rec; /* Sender's max packet size */ 72f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter u8 sspd; /* Sender's max speed */ 73f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter __be16 fifo_hi; /* hi 16bits of sender's FIFO addr */ 74f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter __be32 fifo_lo; /* lo 32bits of sender's FIFO addr */ 75f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter __be32 sip; /* Sender's IP Address */ 76f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter __be32 tip; /* IP Address of requested hw addr */ 77bf337b15c28ae25904a73e7e2e0de2f9c4f0e9f8August Lilleaas} __packed; 78c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 79f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter/* This header format is specific to this driver implementation. */ 80f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter#define FWNET_ALEN 8 81f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter#define FWNET_HLEN 10 82f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstruct fwnet_header { 83f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter u8 h_dest[FWNET_ALEN]; /* destination address */ 84f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter __be16 h_proto; /* packet type ID field */ 85bf337b15c28ae25904a73e7e2e0de2f9c4f0e9f8August Lilleaas} __packed; 86c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 87f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter/* IPv4 and IPv6 encapsulation header */ 88f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstruct rfc2734_header { 89c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason u32 w0; 90c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason u32 w1; 91c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason}; 92c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 93f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter#define fwnet_get_hdr_lf(h) (((h)->w0 & 0xc0000000) >> 30) 94f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter#define fwnet_get_hdr_ether_type(h) (((h)->w0 & 0x0000ffff)) 95f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter#define fwnet_get_hdr_dg_size(h) (((h)->w0 & 0x0fff0000) >> 16) 96f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter#define fwnet_get_hdr_fg_off(h) (((h)->w0 & 0x00000fff)) 97f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter#define fwnet_get_hdr_dgl(h) (((h)->w1 & 0xffff0000) >> 16) 98c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 99f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter#define fwnet_set_hdr_lf(lf) ((lf) << 30) 100f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter#define fwnet_set_hdr_ether_type(et) (et) 101f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter#define fwnet_set_hdr_dg_size(dgs) ((dgs) << 16) 102f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter#define fwnet_set_hdr_fg_off(fgo) (fgo) 103c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 104f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter#define fwnet_set_hdr_dgl(dgl) ((dgl) << 16) 105c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 106f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic inline void fwnet_make_uf_hdr(struct rfc2734_header *hdr, 107f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter unsigned ether_type) 108f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 109f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter hdr->w0 = fwnet_set_hdr_lf(RFC2374_HDR_UNFRAG) 110f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter | fwnet_set_hdr_ether_type(ether_type); 111f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter} 112c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 113f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic inline void fwnet_make_ff_hdr(struct rfc2734_header *hdr, 114f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter unsigned ether_type, unsigned dg_size, unsigned dgl) 115f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 116f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter hdr->w0 = fwnet_set_hdr_lf(RFC2374_HDR_FIRSTFRAG) 117f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter | fwnet_set_hdr_dg_size(dg_size) 118f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter | fwnet_set_hdr_ether_type(ether_type); 119f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter hdr->w1 = fwnet_set_hdr_dgl(dgl); 120f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter} 121c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 122f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic inline void fwnet_make_sf_hdr(struct rfc2734_header *hdr, 123f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter unsigned lf, unsigned dg_size, unsigned fg_off, unsigned dgl) 124f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 125f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter hdr->w0 = fwnet_set_hdr_lf(lf) 126f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter | fwnet_set_hdr_dg_size(dg_size) 127f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter | fwnet_set_hdr_fg_off(fg_off); 128f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter hdr->w1 = fwnet_set_hdr_dgl(dgl); 129f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter} 130c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 131c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason/* This list keeps track of what parts of the datagram have been filled in */ 132f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstruct fwnet_fragment_info { 133f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct list_head fi_link; 134c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason u16 offset; 135c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason u16 len; 136c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason}; 137c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 138f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstruct fwnet_partial_datagram { 139f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct list_head pd_link; 140f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct list_head fi_list; 141c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason struct sk_buff *skb; 142c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason /* FIXME Why not use skb->data? */ 143c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason char *pbuf; 144c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason u16 datagram_label; 145c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason u16 ether_type; 146c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason u16 datagram_size; 147c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason}; 148c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1495a124d382ea5c97be43c779e4f481455e0287654Stefan Richterstatic DEFINE_MUTEX(fwnet_device_mutex); 1505a124d382ea5c97be43c779e4f481455e0287654Stefan Richterstatic LIST_HEAD(fwnet_device_list); 151c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 152f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstruct fwnet_device { 1535a124d382ea5c97be43c779e4f481455e0287654Stefan Richter struct list_head dev_link; 154c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason spinlock_t lock; 155f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter enum { 156f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter FWNET_BROADCAST_ERROR, 157f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter FWNET_BROADCAST_RUNNING, 158f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter FWNET_BROADCAST_STOPPED, 159f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter } broadcast_state; 160c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason struct fw_iso_context *broadcast_rcv_context; 161c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason struct fw_iso_buffer broadcast_rcv_buffer; 162c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason void **broadcast_rcv_buffer_ptrs; 163c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason unsigned broadcast_rcv_next_ptr; 164c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason unsigned num_broadcast_rcv_ptrs; 165c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason unsigned rcv_buffer_size; 166c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason /* 167c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * This value is the maximum unfragmented datagram size that can be 168c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * sent by the hardware. It already has the GASP overhead and the 169c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * unfragmented datagram header overhead calculated into it. 170c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason */ 171c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason unsigned broadcast_xmt_max_payload; 172c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason u16 broadcast_xmt_datagramlabel; 173c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 174c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason /* 175f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter * The CSR address that remote nodes must send datagrams to for us to 176c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * receive them. 177c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason */ 178c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason struct fw_address_handler handler; 179c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason u64 local_fifo; 180c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 18148553011cea504796e513350740781ac6745f556Stefan Richter /* Number of tx datagrams that have been queued but not yet acked */ 18248553011cea504796e513350740781ac6745f556Stefan Richter int queued_datagrams; 183c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 184c16714704bb35165e5b85d927873dcc643772648Stefan Richter int peer_count; 1855a124d382ea5c97be43c779e4f481455e0287654Stefan Richter struct list_head peer_list; 186c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason struct fw_card *card; 1875a124d382ea5c97be43c779e4f481455e0287654Stefan Richter struct net_device *netdev; 1885a124d382ea5c97be43c779e4f481455e0287654Stefan Richter}; 1895a124d382ea5c97be43c779e4f481455e0287654Stefan Richter 1905a124d382ea5c97be43c779e4f481455e0287654Stefan Richterstruct fwnet_peer { 1915a124d382ea5c97be43c779e4f481455e0287654Stefan Richter struct list_head peer_link; 1925a124d382ea5c97be43c779e4f481455e0287654Stefan Richter struct fwnet_device *dev; 1935a124d382ea5c97be43c779e4f481455e0287654Stefan Richter u64 guid; 1945a124d382ea5c97be43c779e4f481455e0287654Stefan Richter u64 fifo; 19574a145049938b73b7e5421423f64a254d4192d3fMaxim Levitsky __be32 ip; 1965a124d382ea5c97be43c779e4f481455e0287654Stefan Richter 1975a124d382ea5c97be43c779e4f481455e0287654Stefan Richter /* guarded by dev->lock */ 1985a124d382ea5c97be43c779e4f481455e0287654Stefan Richter struct list_head pd_list; /* received partial datagrams */ 1995a124d382ea5c97be43c779e4f481455e0287654Stefan Richter unsigned pdg_size; /* pd_list size */ 2005a124d382ea5c97be43c779e4f481455e0287654Stefan Richter 2015a124d382ea5c97be43c779e4f481455e0287654Stefan Richter u16 datagram_label; /* outgoing datagram label */ 20248553011cea504796e513350740781ac6745f556Stefan Richter u16 max_payload; /* includes RFC2374_FRAG_HDR_SIZE overhead */ 2035a124d382ea5c97be43c779e4f481455e0287654Stefan Richter int node_id; 2045a124d382ea5c97be43c779e4f481455e0287654Stefan Richter int generation; 2055a124d382ea5c97be43c779e4f481455e0287654Stefan Richter unsigned speed; 206c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason}; 207c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 208c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason/* This is our task struct. It's used for the packet complete callback. */ 209f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstruct fwnet_packet_task { 210c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason struct fw_transaction transaction; 211f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct rfc2734_header hdr; 212c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason struct sk_buff *skb; 213f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fwnet_device *dev; 214f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 215c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason int outstanding_pkts; 216c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason u64 fifo_addr; 217c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason u16 dest_node; 21848553011cea504796e513350740781ac6745f556Stefan Richter u16 max_payload; 219c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason u8 generation; 220c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason u8 speed; 22148553011cea504796e513350740781ac6745f556Stefan Richter u8 enqueued; 222c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason}; 223c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 224f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter/* 225f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter * saddr == NULL means use device source address. 226f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter * daddr == NULL means leave destination address (eg unresolved arp). 227f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter */ 228f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic int fwnet_header_create(struct sk_buff *skb, struct net_device *net, 229f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter unsigned short type, const void *daddr, 230f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter const void *saddr, unsigned len) 231f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 232f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fwnet_header *h; 233c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 234f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter h = (struct fwnet_header *)skb_push(skb, sizeof(*h)); 235f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter put_unaligned_be16(type, &h->h_proto); 236c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 237f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (net->flags & (IFF_LOOPBACK | IFF_NOARP)) { 238f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter memset(h->h_dest, 0, net->addr_len); 239c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 240f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter return net->hard_header_len; 241c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 242c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 243c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason if (daddr) { 244f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter memcpy(h->h_dest, daddr, net->addr_len); 245f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 246f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter return net->hard_header_len; 247c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 248c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 249f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter return -net->hard_header_len; 250c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 251c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 252f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic int fwnet_header_rebuild(struct sk_buff *skb) 253c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason{ 254f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fwnet_header *h = (struct fwnet_header *)skb->data; 255c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 256f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (get_unaligned_be16(&h->h_proto) == ETH_P_IP) 257f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter return arp_find((unsigned char *)&h->h_dest, skb); 258c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 2598408dc1c14c113face77f6f967af98f76999989fStefan Richter dev_notice(&skb->dev->dev, "unable to resolve type %04x addresses\n", 2608408dc1c14c113face77f6f967af98f76999989fStefan Richter be16_to_cpu(h->h_proto)); 261c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason return 0; 262c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 263c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 264f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic int fwnet_header_cache(const struct neighbour *neigh, 265e69dd336ee3a05a589629b505b18ba5e7a5b4c54David S. Miller struct hh_cache *hh, __be16 type) 266f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 267f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct net_device *net; 268f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fwnet_header *h; 269c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 270e69dd336ee3a05a589629b505b18ba5e7a5b4c54David S. Miller if (type == cpu_to_be16(ETH_P_802_3)) 271c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason return -1; 272f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter net = neigh->dev; 273f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter h = (struct fwnet_header *)((u8 *)hh->hh_data + 16 - sizeof(*h)); 274e69dd336ee3a05a589629b505b18ba5e7a5b4c54David S. Miller h->h_proto = type; 275f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter memcpy(h->h_dest, neigh->ha, net->addr_len); 276f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter hh->hh_len = FWNET_HLEN; 277c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 278c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason return 0; 279c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 280c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 281c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason/* Called by Address Resolution module to notify changes in address. */ 282f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic void fwnet_header_cache_update(struct hh_cache *hh, 283f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter const struct net_device *net, const unsigned char *haddr) 284f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 285f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter memcpy((u8 *)hh->hh_data + 16 - FWNET_HLEN, haddr, net->addr_len); 286c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 287c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 288f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic int fwnet_header_parse(const struct sk_buff *skb, unsigned char *haddr) 289f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 290f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter memcpy(haddr, skb->dev->dev_addr, FWNET_ALEN); 291f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 292f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter return FWNET_ALEN; 293c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 294c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 295f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic const struct header_ops fwnet_header_ops = { 296f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter .create = fwnet_header_create, 297f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter .rebuild = fwnet_header_rebuild, 298f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter .cache = fwnet_header_cache, 299f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter .cache_update = fwnet_header_cache_update, 300f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter .parse = fwnet_header_parse, 301c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason}; 302c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 303c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason/* FIXME: is this correct for all cases? */ 304f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic bool fwnet_frag_overlap(struct fwnet_partial_datagram *pd, 305f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter unsigned offset, unsigned len) 306c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason{ 307f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fwnet_fragment_info *fi; 308c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason unsigned end = offset + len; 309c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 310f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter list_for_each_entry(fi, &pd->fi_list, fi_link) 311f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (offset < fi->offset + fi->len && end > fi->offset) 312c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason return true; 313f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 314c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason return false; 315c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 316c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 317c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason/* Assumes that new fragment does not overlap any existing fragments */ 318f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic struct fwnet_fragment_info *fwnet_frag_new( 319f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fwnet_partial_datagram *pd, unsigned offset, unsigned len) 320f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 321f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fwnet_fragment_info *fi, *fi2, *new; 322c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason struct list_head *list; 323c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 324f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter list = &pd->fi_list; 325f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter list_for_each_entry(fi, &pd->fi_list, fi_link) { 326c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason if (fi->offset + fi->len == offset) { 327c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason /* The new fragment can be tacked on to the end */ 328c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason /* Did the new fragment plug a hole? */ 329f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fi2 = list_entry(fi->fi_link.next, 330f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fwnet_fragment_info, fi_link); 331c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason if (fi->offset + fi->len == fi2->offset) { 332c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason /* glue fragments together */ 333c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason fi->len += len + fi2->len; 334f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter list_del(&fi2->fi_link); 335c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason kfree(fi2); 336c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } else { 337c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason fi->len += len; 338c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 339f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 340c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason return fi; 341c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 342c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason if (offset + len == fi->offset) { 343c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason /* The new fragment can be tacked on to the beginning */ 344c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason /* Did the new fragment plug a hole? */ 345f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fi2 = list_entry(fi->fi_link.prev, 346f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fwnet_fragment_info, fi_link); 347c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason if (fi2->offset + fi2->len == fi->offset) { 348c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason /* glue fragments together */ 349c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason fi2->len += fi->len + len; 350f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter list_del(&fi->fi_link); 351c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason kfree(fi); 352f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 353c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason return fi2; 354c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 355c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason fi->offset = offset; 356c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason fi->len += len; 357f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 358c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason return fi; 359c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 360c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason if (offset > fi->offset + fi->len) { 361f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter list = &fi->fi_link; 362c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason break; 363c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 364c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason if (offset + len < fi->offset) { 365f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter list = fi->fi_link.prev; 366c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason break; 367c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 368c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 369c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 370c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason new = kmalloc(sizeof(*new), GFP_ATOMIC); 371c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason if (!new) { 3728408dc1c14c113face77f6f967af98f76999989fStefan Richter dev_err(&pd->skb->dev->dev, "out of memory\n"); 373c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason return NULL; 374c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 375c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 376c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason new->offset = offset; 377c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason new->len = len; 378f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter list_add(&new->fi_link, list); 379f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 380c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason return new; 381c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 382c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 383f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic struct fwnet_partial_datagram *fwnet_pd_new(struct net_device *net, 384f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fwnet_peer *peer, u16 datagram_label, unsigned dg_size, 385f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter void *frag_buf, unsigned frag_off, unsigned frag_len) 386f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 387f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fwnet_partial_datagram *new; 388f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fwnet_fragment_info *fi; 389c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 390c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason new = kmalloc(sizeof(*new), GFP_ATOMIC); 391c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason if (!new) 392c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason goto fail; 393f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 394f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter INIT_LIST_HEAD(&new->fi_list); 395f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fi = fwnet_frag_new(new, frag_off, frag_len); 396f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (fi == NULL) 397c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason goto fail_w_new; 398f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 399c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason new->datagram_label = datagram_label; 400c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason new->datagram_size = dg_size; 401f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter new->skb = dev_alloc_skb(dg_size + net->hard_header_len + 15); 402f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (new->skb == NULL) 403c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason goto fail_w_fi; 404f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 405f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter skb_reserve(new->skb, (net->hard_header_len + 15) & ~15); 406c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason new->pbuf = skb_put(new->skb, dg_size); 407c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason memcpy(new->pbuf + frag_off, frag_buf, frag_len); 408f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter list_add_tail(&new->pd_link, &peer->pd_list); 409f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 410c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason return new; 411c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 412c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlasonfail_w_fi: 413c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason kfree(fi); 414c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlasonfail_w_new: 415c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason kfree(new); 416c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlasonfail: 4178408dc1c14c113face77f6f967af98f76999989fStefan Richter dev_err(&net->dev, "out of memory\n"); 418f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 419c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason return NULL; 420c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 421c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 422f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic struct fwnet_partial_datagram *fwnet_pd_find(struct fwnet_peer *peer, 423f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter u16 datagram_label) 424f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 425f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fwnet_partial_datagram *pd; 426c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 427f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter list_for_each_entry(pd, &peer->pd_list, pd_link) 428f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (pd->datagram_label == datagram_label) 429c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason return pd; 430f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 431c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason return NULL; 432c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 433c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 434c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 435f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic void fwnet_pd_delete(struct fwnet_partial_datagram *old) 436f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 437f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fwnet_fragment_info *fi, *n; 438c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 439f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter list_for_each_entry_safe(fi, n, &old->fi_list, fi_link) 440c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason kfree(fi); 441f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 442f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter list_del(&old->pd_link); 443c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason dev_kfree_skb_any(old->skb); 444c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason kfree(old); 445c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 446c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 447f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic bool fwnet_pd_update(struct fwnet_peer *peer, 448f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fwnet_partial_datagram *pd, void *frag_buf, 449f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter unsigned frag_off, unsigned frag_len) 450f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 451f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (fwnet_frag_new(pd, frag_off, frag_len) == NULL) 452c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason return false; 453f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 454c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason memcpy(pd->pbuf + frag_off, frag_buf, frag_len); 455c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 456c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason /* 45725985edcedea6396277003854657b5f3cb31a628Lucas De Marchi * Move list entry to beginning of list so that oldest partial 458c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * datagrams percolate to the end of the list 459c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason */ 460f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter list_move_tail(&pd->pd_link, &peer->pd_list); 461f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 462c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason return true; 463c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 464c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 465f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic bool fwnet_pd_is_complete(struct fwnet_partial_datagram *pd) 466f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 467f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fwnet_fragment_info *fi; 468c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 469f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fi = list_entry(pd->fi_list.next, struct fwnet_fragment_info, fi_link); 470c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 471f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter return fi->len == pd->datagram_size; 472c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 473c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 4745a124d382ea5c97be43c779e4f481455e0287654Stefan Richter/* caller must hold dev->lock */ 475f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic struct fwnet_peer *fwnet_peer_find_by_guid(struct fwnet_device *dev, 476f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter u64 guid) 477f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 4785a124d382ea5c97be43c779e4f481455e0287654Stefan Richter struct fwnet_peer *peer; 479c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 4805a124d382ea5c97be43c779e4f481455e0287654Stefan Richter list_for_each_entry(peer, &dev->peer_list, peer_link) 4815a124d382ea5c97be43c779e4f481455e0287654Stefan Richter if (peer->guid == guid) 4825a124d382ea5c97be43c779e4f481455e0287654Stefan Richter return peer; 483c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 4845a124d382ea5c97be43c779e4f481455e0287654Stefan Richter return NULL; 485c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 486c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 4875a124d382ea5c97be43c779e4f481455e0287654Stefan Richter/* caller must hold dev->lock */ 488f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic struct fwnet_peer *fwnet_peer_find_by_node_id(struct fwnet_device *dev, 4895a124d382ea5c97be43c779e4f481455e0287654Stefan Richter int node_id, int generation) 490f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 4915a124d382ea5c97be43c779e4f481455e0287654Stefan Richter struct fwnet_peer *peer; 492c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 4935a124d382ea5c97be43c779e4f481455e0287654Stefan Richter list_for_each_entry(peer, &dev->peer_list, peer_link) 4945a124d382ea5c97be43c779e4f481455e0287654Stefan Richter if (peer->node_id == node_id && 4955a124d382ea5c97be43c779e4f481455e0287654Stefan Richter peer->generation == generation) 4965a124d382ea5c97be43c779e4f481455e0287654Stefan Richter return peer; 497f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 4985a124d382ea5c97be43c779e4f481455e0287654Stefan Richter return NULL; 499c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 500c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 5015a124d382ea5c97be43c779e4f481455e0287654Stefan Richter/* See IEEE 1394-2008 table 6-4, table 8-8, table 16-18. */ 5025a124d382ea5c97be43c779e4f481455e0287654Stefan Richterstatic unsigned fwnet_max_payload(unsigned max_rec, unsigned speed) 503f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 5045a124d382ea5c97be43c779e4f481455e0287654Stefan Richter max_rec = min(max_rec, speed + 8); 5054ec4a67aa100268b4ac5ae32b54843d975969969Stefan Richter max_rec = clamp(max_rec, 8U, 11U); /* 512...4096 */ 5065a124d382ea5c97be43c779e4f481455e0287654Stefan Richter 5075a124d382ea5c97be43c779e4f481455e0287654Stefan Richter return (1 << (max_rec + 1)) - RFC2374_FRAG_HDR_SIZE; 508c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 509c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 5105a124d382ea5c97be43c779e4f481455e0287654Stefan Richter 511f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic int fwnet_finish_incoming_packet(struct net_device *net, 512f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct sk_buff *skb, u16 source_node_id, 513f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter bool is_broadcast, u16 ether_type) 514f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 515f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fwnet_device *dev; 516f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter static const __be64 broadcast_hw = cpu_to_be64(~0ULL); 517c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason int status; 518f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter __be64 guid; 519c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 520f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dev = netdev_priv(net); 521c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason /* Write metadata, and then pass to the receive level */ 522f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter skb->dev = net; 523c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason skb->ip_summed = CHECKSUM_UNNECESSARY; /* don't check it */ 524c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 525c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason /* 526c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * Parse the encapsulation header. This actually does the job of 527c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * converting to an ethernet frame header, as well as arp 528c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * conversion if needed. ARP conversion is easier in this 529c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * direction, since we are using ethernet as our backend. 530c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason */ 531c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason /* 532c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * If this is an ARP packet, convert it. First, we want to make 533c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * use of some of the fields, since they tell us a little bit 534c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * about the sending machine. 535c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason */ 536c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason if (ether_type == ETH_P_ARP) { 537f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct rfc2734_arp *arp1394; 538c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason struct arphdr *arp; 539c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason unsigned char *arp_ptr; 540c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason u64 fifo_addr; 541f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter u64 peer_guid; 5425a124d382ea5c97be43c779e4f481455e0287654Stefan Richter unsigned sspd; 543c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason u16 max_payload; 544f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fwnet_peer *peer; 5455a124d382ea5c97be43c779e4f481455e0287654Stefan Richter unsigned long flags; 5465a124d382ea5c97be43c779e4f481455e0287654Stefan Richter 5475a124d382ea5c97be43c779e4f481455e0287654Stefan Richter arp1394 = (struct rfc2734_arp *)skb->data; 5485a124d382ea5c97be43c779e4f481455e0287654Stefan Richter arp = (struct arphdr *)skb->data; 5495a124d382ea5c97be43c779e4f481455e0287654Stefan Richter arp_ptr = (unsigned char *)(arp + 1); 5505a124d382ea5c97be43c779e4f481455e0287654Stefan Richter peer_guid = get_unaligned_be64(&arp1394->s_uniq_id); 5515a124d382ea5c97be43c779e4f481455e0287654Stefan Richter fifo_addr = (u64)get_unaligned_be16(&arp1394->fifo_hi) << 32 5525a124d382ea5c97be43c779e4f481455e0287654Stefan Richter | get_unaligned_be32(&arp1394->fifo_lo); 553c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 554c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason sspd = arp1394->sspd; 555f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter /* Sanity check. OS X 10.3 PPC reportedly sends 131. */ 556f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (sspd > SCODE_3200) { 5578408dc1c14c113face77f6f967af98f76999989fStefan Richter dev_notice(&net->dev, "sspd %x out of range\n", sspd); 5585a124d382ea5c97be43c779e4f481455e0287654Stefan Richter sspd = SCODE_3200; 559c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 5605a124d382ea5c97be43c779e4f481455e0287654Stefan Richter max_payload = fwnet_max_payload(arp1394->max_rec, sspd); 561c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 5625a124d382ea5c97be43c779e4f481455e0287654Stefan Richter spin_lock_irqsave(&dev->lock, flags); 563f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter peer = fwnet_peer_find_by_guid(dev, peer_guid); 5645a124d382ea5c97be43c779e4f481455e0287654Stefan Richter if (peer) { 5655a124d382ea5c97be43c779e4f481455e0287654Stefan Richter peer->fifo = fifo_addr; 5665a124d382ea5c97be43c779e4f481455e0287654Stefan Richter 5675a124d382ea5c97be43c779e4f481455e0287654Stefan Richter if (peer->speed > sspd) 5685a124d382ea5c97be43c779e4f481455e0287654Stefan Richter peer->speed = sspd; 5695a124d382ea5c97be43c779e4f481455e0287654Stefan Richter if (peer->max_payload > max_payload) 5705a124d382ea5c97be43c779e4f481455e0287654Stefan Richter peer->max_payload = max_payload; 57174a145049938b73b7e5421423f64a254d4192d3fMaxim Levitsky 57274a145049938b73b7e5421423f64a254d4192d3fMaxim Levitsky peer->ip = arp1394->sip; 5735a124d382ea5c97be43c779e4f481455e0287654Stefan Richter } 5745a124d382ea5c97be43c779e4f481455e0287654Stefan Richter spin_unlock_irqrestore(&dev->lock, flags); 5755a124d382ea5c97be43c779e4f481455e0287654Stefan Richter 576f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (!peer) { 5778408dc1c14c113face77f6f967af98f76999989fStefan Richter dev_notice(&net->dev, 5788408dc1c14c113face77f6f967af98f76999989fStefan Richter "no peer for ARP packet from %016llx\n", 5798408dc1c14c113face77f6f967af98f76999989fStefan Richter (unsigned long long)peer_guid); 5801bf145fed572583d4cb7c1784689a0b42c997ba6Stefan Richter goto no_peer; 581c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 582f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 583c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason /* 584c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * Now that we're done with the 1394 specific stuff, we'll 585c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * need to alter some of the data. Believe it or not, all 586c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * that needs to be done is sender_IP_address needs to be 587c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * moved, the destination hardware address get stuffed 588c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * in and the hardware address length set to 8. 589c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * 590c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * IMPORTANT: The code below overwrites 1394 specific data 591c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * needed above so keep the munging of the data for the 592c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * higher level IP stack last. 593c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason */ 594c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 595c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason arp->ar_hln = 8; 596f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter /* skip over sender unique id */ 597f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter arp_ptr += arp->ar_hln; 598f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter /* move sender IP addr */ 599f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter put_unaligned(arp1394->sip, (u32 *)arp_ptr); 600f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter /* skip over sender IP addr */ 601f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter arp_ptr += arp->ar_pln; 602c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 603c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason if (arp->ar_op == htons(ARPOP_REQUEST)) 604c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason memset(arp_ptr, 0, sizeof(u64)); 605c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason else 606f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter memcpy(arp_ptr, net->dev_addr, sizeof(u64)); 607c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 608c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 609c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason /* Now add the ethernet header. */ 610f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter guid = cpu_to_be64(dev->card->guid); 611f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (dev_hard_header(skb, net, ether_type, 612f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter is_broadcast ? &broadcast_hw : &guid, 613f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter NULL, skb->len) >= 0) { 614f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fwnet_header *eth; 615c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason u16 *rawp; 616c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason __be16 protocol; 617c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 618c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason skb_reset_mac_header(skb); 619c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason skb_pull(skb, sizeof(*eth)); 620f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter eth = (struct fwnet_header *)skb_mac_header(skb); 621c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason if (*eth->h_dest & 1) { 622f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (memcmp(eth->h_dest, net->broadcast, 623f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter net->addr_len) == 0) 624c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason skb->pkt_type = PACKET_BROADCAST; 625c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason#if 0 626c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason else 627c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason skb->pkt_type = PACKET_MULTICAST; 628c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason#endif 629c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } else { 630156ce867a6725ea8a24b452469a6dc9f3fa6a161Stefan Richter if (memcmp(eth->h_dest, net->dev_addr, net->addr_len)) 631c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason skb->pkt_type = PACKET_OTHERHOST; 632c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 633c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason if (ntohs(eth->h_proto) >= 1536) { 634c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason protocol = eth->h_proto; 635c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } else { 636c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason rawp = (u16 *)skb->data; 637f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (*rawp == 0xffff) 638c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason protocol = htons(ETH_P_802_3); 639f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter else 640c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason protocol = htons(ETH_P_802_2); 641c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 642c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason skb->protocol = protocol; 643c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 644c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason status = netif_rx(skb); 645f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (status == NET_RX_DROP) { 646f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter net->stats.rx_errors++; 647f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter net->stats.rx_dropped++; 648c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } else { 649f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter net->stats.rx_packets++; 650f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter net->stats.rx_bytes += skb->len; 651c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 652f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 653c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason return 0; 654c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 6551bf145fed572583d4cb7c1784689a0b42c997ba6Stefan Richter no_peer: 656f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter net->stats.rx_errors++; 657f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter net->stats.rx_dropped++; 658f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 659c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason dev_kfree_skb_any(skb); 660f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 6611bf145fed572583d4cb7c1784689a0b42c997ba6Stefan Richter return -ENOENT; 662c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 663c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 664f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic int fwnet_incoming_packet(struct fwnet_device *dev, __be32 *buf, int len, 6655a124d382ea5c97be43c779e4f481455e0287654Stefan Richter int source_node_id, int generation, 6665a124d382ea5c97be43c779e4f481455e0287654Stefan Richter bool is_broadcast) 667f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 668c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason struct sk_buff *skb; 6695a124d382ea5c97be43c779e4f481455e0287654Stefan Richter struct net_device *net = dev->netdev; 670f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct rfc2734_header hdr; 671c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason unsigned lf; 672c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason unsigned long flags; 673f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fwnet_peer *peer; 674f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fwnet_partial_datagram *pd; 675c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason int fg_off; 676c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason int dg_size; 677c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason u16 datagram_label; 678c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason int retval; 679c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason u16 ether_type; 680c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 681f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter hdr.w0 = be32_to_cpu(buf[0]); 682f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter lf = fwnet_get_hdr_lf(&hdr); 683f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (lf == RFC2374_HDR_UNFRAG) { 684c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason /* 685c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * An unfragmented datagram has been received by the ieee1394 686c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * bus. Build an skbuff around it so we can pass it to the 687c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * high level network layer. 688c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason */ 689f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter ether_type = fwnet_get_hdr_ether_type(&hdr); 690c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason buf++; 691f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter len -= RFC2374_UNFRAG_HDR_SIZE; 692c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 693f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter skb = dev_alloc_skb(len + net->hard_header_len + 15); 694c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason if (unlikely(!skb)) { 6958408dc1c14c113face77f6f967af98f76999989fStefan Richter dev_err(&net->dev, "out of memory\n"); 696f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter net->stats.rx_dropped++; 697f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 6981bf145fed572583d4cb7c1784689a0b42c997ba6Stefan Richter return -ENOMEM; 699c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 700f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter skb_reserve(skb, (net->hard_header_len + 15) & ~15); 701f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter memcpy(skb_put(skb, len), buf, len); 702f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 703f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter return fwnet_finish_incoming_packet(net, skb, source_node_id, 704f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter is_broadcast, ether_type); 705c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 706c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason /* A datagram fragment has been received, now the fun begins. */ 707c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason hdr.w1 = ntohl(buf[1]); 708f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter buf += 2; 709f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter len -= RFC2374_FRAG_HDR_SIZE; 710f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (lf == RFC2374_HDR_FIRSTFRAG) { 711f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter ether_type = fwnet_get_hdr_ether_type(&hdr); 712c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason fg_off = 0; 713c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } else { 714f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter ether_type = 0; 715f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fg_off = fwnet_get_hdr_fg_off(&hdr); 716c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 717f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter datagram_label = fwnet_get_hdr_dgl(&hdr); 718f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dg_size = fwnet_get_hdr_dg_size(&hdr); /* ??? + 1 */ 719f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 7205a124d382ea5c97be43c779e4f481455e0287654Stefan Richter spin_lock_irqsave(&dev->lock, flags); 7215a124d382ea5c97be43c779e4f481455e0287654Stefan Richter 7225a124d382ea5c97be43c779e4f481455e0287654Stefan Richter peer = fwnet_peer_find_by_node_id(dev, source_node_id, generation); 7231bf145fed572583d4cb7c1784689a0b42c997ba6Stefan Richter if (!peer) { 7241bf145fed572583d4cb7c1784689a0b42c997ba6Stefan Richter retval = -ENOENT; 7251bf145fed572583d4cb7c1784689a0b42c997ba6Stefan Richter goto fail; 7261bf145fed572583d4cb7c1784689a0b42c997ba6Stefan Richter } 727f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 728f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter pd = fwnet_pd_find(peer, datagram_label); 729c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason if (pd == NULL) { 730f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter while (peer->pdg_size >= FWNET_MAX_FRAGMENTS) { 731c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason /* remove the oldest */ 732f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fwnet_pd_delete(list_first_entry(&peer->pd_list, 733f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fwnet_partial_datagram, pd_link)); 734f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter peer->pdg_size--; 735c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 736f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter pd = fwnet_pd_new(net, peer, datagram_label, 737f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dg_size, buf, fg_off, len); 738f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (pd == NULL) { 739c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason retval = -ENOMEM; 7401bf145fed572583d4cb7c1784689a0b42c997ba6Stefan Richter goto fail; 741c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 742f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter peer->pdg_size++; 743c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } else { 744f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (fwnet_frag_overlap(pd, fg_off, len) || 745f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter pd->datagram_size != dg_size) { 746c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason /* 747c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * Differing datagram sizes or overlapping fragments, 748f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter * discard old datagram and start a new one. 749c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason */ 750f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fwnet_pd_delete(pd); 751f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter pd = fwnet_pd_new(net, peer, datagram_label, 752f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dg_size, buf, fg_off, len); 753f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (pd == NULL) { 754f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter peer->pdg_size--; 7551bf145fed572583d4cb7c1784689a0b42c997ba6Stefan Richter retval = -ENOMEM; 7561bf145fed572583d4cb7c1784689a0b42c997ba6Stefan Richter goto fail; 757c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 758c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } else { 759f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (!fwnet_pd_update(peer, pd, buf, fg_off, len)) { 760c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason /* 761c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * Couldn't save off fragment anyway 762c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * so might as well obliterate the 763c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * datagram now. 764c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason */ 765f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fwnet_pd_delete(pd); 766f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter peer->pdg_size--; 7671bf145fed572583d4cb7c1784689a0b42c997ba6Stefan Richter retval = -ENOMEM; 7681bf145fed572583d4cb7c1784689a0b42c997ba6Stefan Richter goto fail; 769c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 770c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 771c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } /* new datagram or add to existing one */ 772c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 773f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (lf == RFC2374_HDR_FIRSTFRAG) 774c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason pd->ether_type = ether_type; 775f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 776f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (fwnet_pd_is_complete(pd)) { 777c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason ether_type = pd->ether_type; 778f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter peer->pdg_size--; 779c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason skb = skb_get(pd->skb); 780f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fwnet_pd_delete(pd); 781f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 7825a124d382ea5c97be43c779e4f481455e0287654Stefan Richter spin_unlock_irqrestore(&dev->lock, flags); 783f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 784f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter return fwnet_finish_incoming_packet(net, skb, source_node_id, 785f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter false, ether_type); 786c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 787c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason /* 788c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * Datagram is not complete, we're done for the 789c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * moment. 790c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason */ 791b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter retval = 0; 7921bf145fed572583d4cb7c1784689a0b42c997ba6Stefan Richter fail: 7935a124d382ea5c97be43c779e4f481455e0287654Stefan Richter spin_unlock_irqrestore(&dev->lock, flags); 794f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 7951bf145fed572583d4cb7c1784689a0b42c997ba6Stefan Richter return retval; 796c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 797c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 798f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic void fwnet_receive_packet(struct fw_card *card, struct fw_request *r, 799f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter int tcode, int destination, int source, int generation, 80033e553fe2b4a983ef34a57ab1440d8d33397bb12Stefan Richter unsigned long long offset, void *payload, size_t length, 80133e553fe2b4a983ef34a57ab1440d8d33397bb12Stefan Richter void *callback_data) 802f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 80300635b8ee2b5650fd01f5602ecfa289db336b570Stefan Richter struct fwnet_device *dev = callback_data; 80400635b8ee2b5650fd01f5602ecfa289db336b570Stefan Richter int rcode; 805c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 80600635b8ee2b5650fd01f5602ecfa289db336b570Stefan Richter if (destination == IEEE1394_ALL_NODES) { 80700635b8ee2b5650fd01f5602ecfa289db336b570Stefan Richter kfree(r); 808f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 809c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason return; 810c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 811f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 81200635b8ee2b5650fd01f5602ecfa289db336b570Stefan Richter if (offset != dev->handler.offset) 81300635b8ee2b5650fd01f5602ecfa289db336b570Stefan Richter rcode = RCODE_ADDRESS_ERROR; 81400635b8ee2b5650fd01f5602ecfa289db336b570Stefan Richter else if (tcode != TCODE_WRITE_BLOCK_REQUEST) 81500635b8ee2b5650fd01f5602ecfa289db336b570Stefan Richter rcode = RCODE_TYPE_ERROR; 81600635b8ee2b5650fd01f5602ecfa289db336b570Stefan Richter else if (fwnet_incoming_packet(dev, payload, length, 81700635b8ee2b5650fd01f5602ecfa289db336b570Stefan Richter source, generation, false) != 0) { 8188408dc1c14c113face77f6f967af98f76999989fStefan Richter dev_err(&dev->netdev->dev, "incoming packet failure\n"); 81900635b8ee2b5650fd01f5602ecfa289db336b570Stefan Richter rcode = RCODE_CONFLICT_ERROR; 82000635b8ee2b5650fd01f5602ecfa289db336b570Stefan Richter } else 82100635b8ee2b5650fd01f5602ecfa289db336b570Stefan Richter rcode = RCODE_COMPLETE; 822f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 82300635b8ee2b5650fd01f5602ecfa289db336b570Stefan Richter fw_send_response(card, r, rcode); 824c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 825c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 826f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic void fwnet_receive_broadcast(struct fw_iso_context *context, 827f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter u32 cycle, size_t header_length, void *header, void *data) 828f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 829f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fwnet_device *dev; 830c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason struct fw_iso_packet packet; 831c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason struct fw_card *card; 832f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter __be16 *hdr_ptr; 833f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter __be32 *buf_ptr; 834c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason int retval; 835c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason u32 length; 836c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason u16 source_node_id; 837c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason u32 specifier_id; 838c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason u32 ver; 839c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason unsigned long offset; 840c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason unsigned long flags; 841c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 842f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dev = data; 843f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter card = dev->card; 844c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason hdr_ptr = header; 845f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter length = be16_to_cpup(hdr_ptr); 846f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 847f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter spin_lock_irqsave(&dev->lock, flags); 848f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 849f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter offset = dev->rcv_buffer_size * dev->broadcast_rcv_next_ptr; 850f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter buf_ptr = dev->broadcast_rcv_buffer_ptrs[dev->broadcast_rcv_next_ptr++]; 851f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (dev->broadcast_rcv_next_ptr == dev->num_broadcast_rcv_ptrs) 852f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dev->broadcast_rcv_next_ptr = 0; 853f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 854f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter spin_unlock_irqrestore(&dev->lock, flags); 855c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 856c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason specifier_id = (be32_to_cpu(buf_ptr[0]) & 0xffff) << 8 857c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason | (be32_to_cpu(buf_ptr[1]) & 0xff000000) >> 24; 858f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter ver = be32_to_cpu(buf_ptr[1]) & 0xffffff; 859c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason source_node_id = be32_to_cpu(buf_ptr[0]) >> 16; 860f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 861f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (specifier_id == IANA_SPECIFIER_ID && ver == RFC2734_SW_VERSION) { 862c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason buf_ptr += 2; 863f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter length -= IEEE1394_GASP_HDR_SIZE; 864f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fwnet_incoming_packet(dev, buf_ptr, length, 8655a124d382ea5c97be43c779e4f481455e0287654Stefan Richter source_node_id, -1, true); 866f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter } 867f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 868f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter packet.payload_length = dev->rcv_buffer_size; 869c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason packet.interrupt = 1; 870c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason packet.skip = 0; 871c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason packet.tag = 3; 872c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason packet.sy = 0; 873f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter packet.header_length = IEEE1394_GASP_HDR_SIZE; 874f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 875f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter spin_lock_irqsave(&dev->lock, flags); 876c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 877f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter retval = fw_iso_context_queue(dev->broadcast_rcv_context, &packet, 878f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter &dev->broadcast_rcv_buffer, offset); 879f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 880f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter spin_unlock_irqrestore(&dev->lock, flags); 881f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 88213882a82ee1646336c3996c93b4a560a55d2a419Clemens Ladisch if (retval >= 0) 88313882a82ee1646336c3996c93b4a560a55d2a419Clemens Ladisch fw_iso_context_queue_flush(dev->broadcast_rcv_context); 88413882a82ee1646336c3996c93b4a560a55d2a419Clemens Ladisch else 8858408dc1c14c113face77f6f967af98f76999989fStefan Richter dev_err(&dev->netdev->dev, "requeue failed\n"); 886c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 887c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 888f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic struct kmem_cache *fwnet_packet_task_cache; 889f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 890110f82d7a2e0ff5a17617a9672f1ccb7e44bc0c6Stefan Richterstatic void fwnet_free_ptask(struct fwnet_packet_task *ptask) 891110f82d7a2e0ff5a17617a9672f1ccb7e44bc0c6Stefan Richter{ 892110f82d7a2e0ff5a17617a9672f1ccb7e44bc0c6Stefan Richter dev_kfree_skb_any(ptask->skb); 893110f82d7a2e0ff5a17617a9672f1ccb7e44bc0c6Stefan Richter kmem_cache_free(fwnet_packet_task_cache, ptask); 894110f82d7a2e0ff5a17617a9672f1ccb7e44bc0c6Stefan Richter} 895110f82d7a2e0ff5a17617a9672f1ccb7e44bc0c6Stefan Richter 896b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter/* Caller must hold dev->lock. */ 897b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richterstatic void dec_queued_datagrams(struct fwnet_device *dev) 898b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter{ 899b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter if (--dev->queued_datagrams == FWNET_MIN_QUEUED_DATAGRAMS) 900b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter netif_wake_queue(dev->netdev); 901b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter} 902b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter 903f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic int fwnet_send_packet(struct fwnet_packet_task *ptask); 904f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 905f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic void fwnet_transmit_packet_done(struct fwnet_packet_task *ptask) 906f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 907110f82d7a2e0ff5a17617a9672f1ccb7e44bc0c6Stefan Richter struct fwnet_device *dev = ptask->dev; 908902bca00dc6e3b3ff5fbb1e32e5dbb45d5f30579Stefan Richter struct sk_buff *skb = ptask->skb; 909c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason unsigned long flags; 910110f82d7a2e0ff5a17617a9672f1ccb7e44bc0c6Stefan Richter bool free; 911f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 912f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter spin_lock_irqsave(&dev->lock, flags); 913f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 914110f82d7a2e0ff5a17617a9672f1ccb7e44bc0c6Stefan Richter ptask->outstanding_pkts--; 915110f82d7a2e0ff5a17617a9672f1ccb7e44bc0c6Stefan Richter 916110f82d7a2e0ff5a17617a9672f1ccb7e44bc0c6Stefan Richter /* Check whether we or the networking TX soft-IRQ is last user. */ 91748553011cea504796e513350740781ac6745f556Stefan Richter free = (ptask->outstanding_pkts == 0 && ptask->enqueued); 9187ee11fa8d0a84b05cefe12b0bebc05ab0ea89cd6Stefan Richter if (free) 919b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter dec_queued_datagrams(dev); 920110f82d7a2e0ff5a17617a9672f1ccb7e44bc0c6Stefan Richter 921902bca00dc6e3b3ff5fbb1e32e5dbb45d5f30579Stefan Richter if (ptask->outstanding_pkts == 0) { 922902bca00dc6e3b3ff5fbb1e32e5dbb45d5f30579Stefan Richter dev->netdev->stats.tx_packets++; 923902bca00dc6e3b3ff5fbb1e32e5dbb45d5f30579Stefan Richter dev->netdev->stats.tx_bytes += skb->len; 924902bca00dc6e3b3ff5fbb1e32e5dbb45d5f30579Stefan Richter } 925110f82d7a2e0ff5a17617a9672f1ccb7e44bc0c6Stefan Richter 926110f82d7a2e0ff5a17617a9672f1ccb7e44bc0c6Stefan Richter spin_unlock_irqrestore(&dev->lock, flags); 927f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 928f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (ptask->outstanding_pkts > 0) { 929c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason u16 dg_size; 930c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason u16 fg_off; 931c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason u16 datagram_label; 932c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason u16 lf; 933c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 934c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason /* Update the ptask to point to the next fragment and send it */ 935f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter lf = fwnet_get_hdr_lf(&ptask->hdr); 936c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason switch (lf) { 937f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter case RFC2374_HDR_LASTFRAG: 938f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter case RFC2374_HDR_UNFRAG: 939c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason default: 9408408dc1c14c113face77f6f967af98f76999989fStefan Richter dev_err(&dev->netdev->dev, 9418408dc1c14c113face77f6f967af98f76999989fStefan Richter "outstanding packet %x lf %x, header %x,%x\n", 9428408dc1c14c113face77f6f967af98f76999989fStefan Richter ptask->outstanding_pkts, lf, ptask->hdr.w0, 9438408dc1c14c113face77f6f967af98f76999989fStefan Richter ptask->hdr.w1); 944c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason BUG(); 945c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 946f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter case RFC2374_HDR_FIRSTFRAG: 947c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason /* Set frag type here for future interior fragments */ 948f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dg_size = fwnet_get_hdr_dg_size(&ptask->hdr); 949f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fg_off = ptask->max_payload - RFC2374_FRAG_HDR_SIZE; 950f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter datagram_label = fwnet_get_hdr_dgl(&ptask->hdr); 951c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason break; 952c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 953f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter case RFC2374_HDR_INTFRAG: 954f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dg_size = fwnet_get_hdr_dg_size(&ptask->hdr); 955f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fg_off = fwnet_get_hdr_fg_off(&ptask->hdr) 956f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter + ptask->max_payload - RFC2374_FRAG_HDR_SIZE; 957f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter datagram_label = fwnet_get_hdr_dgl(&ptask->hdr); 958c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason break; 959c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 960902bca00dc6e3b3ff5fbb1e32e5dbb45d5f30579Stefan Richter 961f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter skb_pull(skb, ptask->max_payload); 962f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (ptask->outstanding_pkts > 1) { 963f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fwnet_make_sf_hdr(&ptask->hdr, RFC2374_HDR_INTFRAG, 964f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dg_size, fg_off, datagram_label); 965c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } else { 966f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fwnet_make_sf_hdr(&ptask->hdr, RFC2374_HDR_LASTFRAG, 967f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dg_size, fg_off, datagram_label); 968f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter ptask->max_payload = skb->len + RFC2374_FRAG_HDR_SIZE; 969c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 970f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fwnet_send_packet(ptask); 971c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 972110f82d7a2e0ff5a17617a9672f1ccb7e44bc0c6Stefan Richter 973110f82d7a2e0ff5a17617a9672f1ccb7e44bc0c6Stefan Richter if (free) 974110f82d7a2e0ff5a17617a9672f1ccb7e44bc0c6Stefan Richter fwnet_free_ptask(ptask); 975c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 976c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 9777ee11fa8d0a84b05cefe12b0bebc05ab0ea89cd6Stefan Richterstatic void fwnet_transmit_packet_failed(struct fwnet_packet_task *ptask) 9787ee11fa8d0a84b05cefe12b0bebc05ab0ea89cd6Stefan Richter{ 9797ee11fa8d0a84b05cefe12b0bebc05ab0ea89cd6Stefan Richter struct fwnet_device *dev = ptask->dev; 9807ee11fa8d0a84b05cefe12b0bebc05ab0ea89cd6Stefan Richter unsigned long flags; 9817ee11fa8d0a84b05cefe12b0bebc05ab0ea89cd6Stefan Richter bool free; 9827ee11fa8d0a84b05cefe12b0bebc05ab0ea89cd6Stefan Richter 9837ee11fa8d0a84b05cefe12b0bebc05ab0ea89cd6Stefan Richter spin_lock_irqsave(&dev->lock, flags); 9847ee11fa8d0a84b05cefe12b0bebc05ab0ea89cd6Stefan Richter 9857ee11fa8d0a84b05cefe12b0bebc05ab0ea89cd6Stefan Richter /* One fragment failed; don't try to send remaining fragments. */ 9867ee11fa8d0a84b05cefe12b0bebc05ab0ea89cd6Stefan Richter ptask->outstanding_pkts = 0; 9877ee11fa8d0a84b05cefe12b0bebc05ab0ea89cd6Stefan Richter 9887ee11fa8d0a84b05cefe12b0bebc05ab0ea89cd6Stefan Richter /* Check whether we or the networking TX soft-IRQ is last user. */ 98948553011cea504796e513350740781ac6745f556Stefan Richter free = ptask->enqueued; 9907ee11fa8d0a84b05cefe12b0bebc05ab0ea89cd6Stefan Richter if (free) 991b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter dec_queued_datagrams(dev); 9927ee11fa8d0a84b05cefe12b0bebc05ab0ea89cd6Stefan Richter 9937ee11fa8d0a84b05cefe12b0bebc05ab0ea89cd6Stefan Richter dev->netdev->stats.tx_dropped++; 9947ee11fa8d0a84b05cefe12b0bebc05ab0ea89cd6Stefan Richter dev->netdev->stats.tx_errors++; 9957ee11fa8d0a84b05cefe12b0bebc05ab0ea89cd6Stefan Richter 9967ee11fa8d0a84b05cefe12b0bebc05ab0ea89cd6Stefan Richter spin_unlock_irqrestore(&dev->lock, flags); 9977ee11fa8d0a84b05cefe12b0bebc05ab0ea89cd6Stefan Richter 9987ee11fa8d0a84b05cefe12b0bebc05ab0ea89cd6Stefan Richter if (free) 9997ee11fa8d0a84b05cefe12b0bebc05ab0ea89cd6Stefan Richter fwnet_free_ptask(ptask); 10007ee11fa8d0a84b05cefe12b0bebc05ab0ea89cd6Stefan Richter} 10017ee11fa8d0a84b05cefe12b0bebc05ab0ea89cd6Stefan Richter 1002f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic void fwnet_write_complete(struct fw_card *card, int rcode, 1003f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter void *payload, size_t length, void *data) 1004f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 1005c4d6fd40df38eb4c187565d48807f5f902481ba8Maxim Levitsky struct fwnet_packet_task *ptask = data; 1006c4d6fd40df38eb4c187565d48807f5f902481ba8Maxim Levitsky static unsigned long j; 1007c4d6fd40df38eb4c187565d48807f5f902481ba8Maxim Levitsky static int last_rcode, errors_skipped; 1008c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 10097ee11fa8d0a84b05cefe12b0bebc05ab0ea89cd6Stefan Richter if (rcode == RCODE_COMPLETE) { 1010f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fwnet_transmit_packet_done(ptask); 10117ee11fa8d0a84b05cefe12b0bebc05ab0ea89cd6Stefan Richter } else { 10127ee11fa8d0a84b05cefe12b0bebc05ab0ea89cd6Stefan Richter fwnet_transmit_packet_failed(ptask); 1013c4d6fd40df38eb4c187565d48807f5f902481ba8Maxim Levitsky 1014c4d6fd40df38eb4c187565d48807f5f902481ba8Maxim Levitsky if (printk_timed_ratelimit(&j, 1000) || rcode != last_rcode) { 10158408dc1c14c113face77f6f967af98f76999989fStefan Richter dev_err(&ptask->dev->netdev->dev, 10168408dc1c14c113face77f6f967af98f76999989fStefan Richter "fwnet_write_complete failed: %x (skipped %d)\n", 10178408dc1c14c113face77f6f967af98f76999989fStefan Richter rcode, errors_skipped); 1018c4d6fd40df38eb4c187565d48807f5f902481ba8Maxim Levitsky 1019c4d6fd40df38eb4c187565d48807f5f902481ba8Maxim Levitsky errors_skipped = 0; 1020c4d6fd40df38eb4c187565d48807f5f902481ba8Maxim Levitsky last_rcode = rcode; 1021c4d6fd40df38eb4c187565d48807f5f902481ba8Maxim Levitsky } else 1022c4d6fd40df38eb4c187565d48807f5f902481ba8Maxim Levitsky errors_skipped++; 10237ee11fa8d0a84b05cefe12b0bebc05ab0ea89cd6Stefan Richter } 1024c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 1025c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1026f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic int fwnet_send_packet(struct fwnet_packet_task *ptask) 1027f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 1028f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fwnet_device *dev; 1029c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason unsigned tx_len; 1030f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct rfc2734_header *bufhdr; 1031c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason unsigned long flags; 1032110f82d7a2e0ff5a17617a9672f1ccb7e44bc0c6Stefan Richter bool free; 1033c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1034f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dev = ptask->dev; 1035c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason tx_len = ptask->max_payload; 1036f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter switch (fwnet_get_hdr_lf(&ptask->hdr)) { 1037f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter case RFC2374_HDR_UNFRAG: 1038f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter bufhdr = (struct rfc2734_header *) 1039f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter skb_push(ptask->skb, RFC2374_UNFRAG_HDR_SIZE); 1040f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter put_unaligned_be32(ptask->hdr.w0, &bufhdr->w0); 1041c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason break; 1042c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1043f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter case RFC2374_HDR_FIRSTFRAG: 1044f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter case RFC2374_HDR_INTFRAG: 1045f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter case RFC2374_HDR_LASTFRAG: 1046f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter bufhdr = (struct rfc2734_header *) 1047f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter skb_push(ptask->skb, RFC2374_FRAG_HDR_SIZE); 1048f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter put_unaligned_be32(ptask->hdr.w0, &bufhdr->w0); 1049f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter put_unaligned_be32(ptask->hdr.w1, &bufhdr->w1); 1050c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason break; 1051c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1052c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason default: 1053c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason BUG(); 1054c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 1055f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (ptask->dest_node == IEEE1394_ALL_NODES) { 1056f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter u8 *p; 1057c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason int generation; 1058f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter int node_id; 1059c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1060c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason /* ptask->generation may not have been set yet */ 1061f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter generation = dev->card->generation; 1062c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason smp_rmb(); 1063f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter node_id = dev->card->node_id; 1064f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1065f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter p = skb_push(ptask->skb, 8); 1066f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter put_unaligned_be32(node_id << 16 | IANA_SPECIFIER_ID >> 8, p); 1067f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter put_unaligned_be32((IANA_SPECIFIER_ID & 0xff) << 24 1068f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter | RFC2734_SW_VERSION, &p[4]); 1069f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1070f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter /* We should not transmit if broadcast_channel.valid == 0. */ 1071f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fw_send_request(dev->card, &ptask->transaction, 1072f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter TCODE_STREAM_DATA, 1073f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fw_stream_packet_destination_id(3, 1074f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter IEEE1394_BROADCAST_CHANNEL, 0), 1075f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter generation, SCODE_100, 0ULL, ptask->skb->data, 1076f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter tx_len + 8, fwnet_write_complete, ptask); 1077f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1078f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter spin_lock_irqsave(&dev->lock, flags); 1079110f82d7a2e0ff5a17617a9672f1ccb7e44bc0c6Stefan Richter 1080110f82d7a2e0ff5a17617a9672f1ccb7e44bc0c6Stefan Richter /* If the AT tasklet already ran, we may be last user. */ 108148553011cea504796e513350740781ac6745f556Stefan Richter free = (ptask->outstanding_pkts == 0 && !ptask->enqueued); 1082110f82d7a2e0ff5a17617a9672f1ccb7e44bc0c6Stefan Richter if (!free) 108348553011cea504796e513350740781ac6745f556Stefan Richter ptask->enqueued = true; 108448553011cea504796e513350740781ac6745f556Stefan Richter else 1085b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter dec_queued_datagrams(dev); 1086110f82d7a2e0ff5a17617a9672f1ccb7e44bc0c6Stefan Richter 1087f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter spin_unlock_irqrestore(&dev->lock, flags); 1088f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1089110f82d7a2e0ff5a17617a9672f1ccb7e44bc0c6Stefan Richter goto out; 1090c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 1091f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1092f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fw_send_request(dev->card, &ptask->transaction, 1093f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter TCODE_WRITE_BLOCK_REQUEST, ptask->dest_node, 1094f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter ptask->generation, ptask->speed, ptask->fifo_addr, 1095f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter ptask->skb->data, tx_len, fwnet_write_complete, ptask); 1096f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1097f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter spin_lock_irqsave(&dev->lock, flags); 1098110f82d7a2e0ff5a17617a9672f1ccb7e44bc0c6Stefan Richter 1099110f82d7a2e0ff5a17617a9672f1ccb7e44bc0c6Stefan Richter /* If the AT tasklet already ran, we may be last user. */ 110048553011cea504796e513350740781ac6745f556Stefan Richter free = (ptask->outstanding_pkts == 0 && !ptask->enqueued); 1101110f82d7a2e0ff5a17617a9672f1ccb7e44bc0c6Stefan Richter if (!free) 110248553011cea504796e513350740781ac6745f556Stefan Richter ptask->enqueued = true; 110348553011cea504796e513350740781ac6745f556Stefan Richter else 1104b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter dec_queued_datagrams(dev); 1105110f82d7a2e0ff5a17617a9672f1ccb7e44bc0c6Stefan Richter 1106f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter spin_unlock_irqrestore(&dev->lock, flags); 1107f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 11085a124d382ea5c97be43c779e4f481455e0287654Stefan Richter dev->netdev->trans_start = jiffies; 1109110f82d7a2e0ff5a17617a9672f1ccb7e44bc0c6Stefan Richter out: 1110110f82d7a2e0ff5a17617a9672f1ccb7e44bc0c6Stefan Richter if (free) 1111110f82d7a2e0ff5a17617a9672f1ccb7e44bc0c6Stefan Richter fwnet_free_ptask(ptask); 1112f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1113c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason return 0; 1114c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 1115c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1116f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic int fwnet_broadcast_start(struct fwnet_device *dev) 1117f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 1118c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason struct fw_iso_context *context; 1119c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason int retval; 1120c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason unsigned num_packets; 1121c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason unsigned max_receive; 1122c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason struct fw_iso_packet packet; 1123c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason unsigned long offset; 1124c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason unsigned u; 1125c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1126f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (dev->local_fifo == FWNET_NO_FIFO_ADDR) { 1127f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dev->handler.length = 4096; 1128f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dev->handler.address_callback = fwnet_receive_packet; 1129f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dev->handler.callback_data = dev; 1130f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1131a74477db9171e677b7a37b89e6e0ac8a15ba1f26Stephan Gatzka retval = fw_core_add_address_handler(&dev->handler, 1132a74477db9171e677b7a37b89e6e0ac8a15ba1f26Stephan Gatzka &fw_high_memory_region); 1133f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (retval < 0) 1134c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason goto failed_initial; 1135f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1136f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dev->local_fifo = dev->handler.offset; 1137c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 1138c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1139f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter max_receive = 1U << (dev->card->max_receive + 1); 1140f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter num_packets = (FWNET_ISO_PAGE_COUNT * PAGE_SIZE) / max_receive; 1141f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1142f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (!dev->broadcast_rcv_context) { 1143c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason void **ptrptr; 1144c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1145f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter context = fw_iso_context_create(dev->card, 1146f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter FW_ISO_CONTEXT_RECEIVE, IEEE1394_BROADCAST_CHANNEL, 1147f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dev->card->link_speed, 8, fwnet_receive_broadcast, dev); 1148c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason if (IS_ERR(context)) { 1149c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason retval = PTR_ERR(context); 1150c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason goto failed_context_create; 1151c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 1152f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1153f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter retval = fw_iso_buffer_init(&dev->broadcast_rcv_buffer, 1154f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dev->card, FWNET_ISO_PAGE_COUNT, DMA_FROM_DEVICE); 1155f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (retval < 0) 1156c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason goto failed_buffer_init; 1157f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1158f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter ptrptr = kmalloc(sizeof(void *) * num_packets, GFP_KERNEL); 1159f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (!ptrptr) { 1160c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason retval = -ENOMEM; 1161c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason goto failed_ptrs_alloc; 1162c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 1163f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1164f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dev->broadcast_rcv_buffer_ptrs = ptrptr; 1165f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter for (u = 0; u < FWNET_ISO_PAGE_COUNT; u++) { 1166c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason void *ptr; 1167c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason unsigned v; 1168c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1169f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter ptr = kmap(dev->broadcast_rcv_buffer.pages[u]); 1170f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter for (v = 0; v < num_packets / FWNET_ISO_PAGE_COUNT; v++) 1171f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter *ptrptr++ = (void *) 1172f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter ((char *)ptr + v * max_receive); 1173c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 1174f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dev->broadcast_rcv_context = context; 1175f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter } else { 1176f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter context = dev->broadcast_rcv_context; 1177f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter } 1178c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1179c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason packet.payload_length = max_receive; 1180c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason packet.interrupt = 1; 1181c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason packet.skip = 0; 1182c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason packet.tag = 3; 1183c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason packet.sy = 0; 1184f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter packet.header_length = IEEE1394_GASP_HDR_SIZE; 1185c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason offset = 0; 1186f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1187f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter for (u = 0; u < num_packets; u++) { 1188f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter retval = fw_iso_context_queue(context, &packet, 1189f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter &dev->broadcast_rcv_buffer, offset); 1190f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (retval < 0) 1191c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason goto failed_rcv_queue; 1192f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1193c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason offset += max_receive; 1194c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 1195f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dev->num_broadcast_rcv_ptrs = num_packets; 1196f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dev->rcv_buffer_size = max_receive; 1197f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dev->broadcast_rcv_next_ptr = 0U; 1198f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter retval = fw_iso_context_start(context, -1, 0, 1199f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter FW_ISO_CONTEXT_MATCH_ALL_TAGS); /* ??? sync */ 1200f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (retval < 0) 1201c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason goto failed_rcv_queue; 1202f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1203f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter /* FIXME: adjust it according to the min. speed of all known peers? */ 1204f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dev->broadcast_xmt_max_payload = IEEE1394_MAX_PAYLOAD_S100 1205f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter - IEEE1394_GASP_HDR_SIZE - RFC2374_UNFRAG_HDR_SIZE; 1206f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dev->broadcast_state = FWNET_BROADCAST_RUNNING; 1207f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1208c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason return 0; 1209c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1210c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason failed_rcv_queue: 1211f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter kfree(dev->broadcast_rcv_buffer_ptrs); 1212f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dev->broadcast_rcv_buffer_ptrs = NULL; 1213c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason failed_ptrs_alloc: 1214f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fw_iso_buffer_destroy(&dev->broadcast_rcv_buffer, dev->card); 1215c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason failed_buffer_init: 1216f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fw_iso_context_destroy(context); 1217f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dev->broadcast_rcv_context = NULL; 1218c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason failed_context_create: 1219f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fw_core_remove_address_handler(&dev->handler); 1220c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason failed_initial: 1221f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dev->local_fifo = FWNET_NO_FIFO_ADDR; 1222f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1223c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason return retval; 1224c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 1225c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1226c16714704bb35165e5b85d927873dcc643772648Stefan Richterstatic void set_carrier_state(struct fwnet_device *dev) 1227c16714704bb35165e5b85d927873dcc643772648Stefan Richter{ 1228c16714704bb35165e5b85d927873dcc643772648Stefan Richter if (dev->peer_count > 1) 1229c16714704bb35165e5b85d927873dcc643772648Stefan Richter netif_carrier_on(dev->netdev); 1230c16714704bb35165e5b85d927873dcc643772648Stefan Richter else 1231c16714704bb35165e5b85d927873dcc643772648Stefan Richter netif_carrier_off(dev->netdev); 1232c16714704bb35165e5b85d927873dcc643772648Stefan Richter} 1233c16714704bb35165e5b85d927873dcc643772648Stefan Richter 1234f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter/* ifup */ 1235f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic int fwnet_open(struct net_device *net) 1236f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 1237f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fwnet_device *dev = netdev_priv(net); 1238c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason int ret; 1239c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1240f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (dev->broadcast_state == FWNET_BROADCAST_ERROR) { 1241f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter ret = fwnet_broadcast_start(dev); 1242c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason if (ret) 1243c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason return ret; 1244c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 1245f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter netif_start_queue(net); 1246f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1247c16714704bb35165e5b85d927873dcc643772648Stefan Richter spin_lock_irq(&dev->lock); 1248c16714704bb35165e5b85d927873dcc643772648Stefan Richter set_carrier_state(dev); 1249c16714704bb35165e5b85d927873dcc643772648Stefan Richter spin_unlock_irq(&dev->lock); 1250c16714704bb35165e5b85d927873dcc643772648Stefan Richter 1251c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason return 0; 1252c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 1253c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1254f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter/* ifdown */ 1255f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic int fwnet_stop(struct net_device *net) 1256c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason{ 1257f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter netif_stop_queue(net); 1258f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1259f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter /* Deallocate iso context for use by other applications? */ 1260c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1261c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason return 0; 1262c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 1263c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1264424efe9caf6047ffbcd6b383ff4d2347254aabf1Stephen Hemmingerstatic netdev_tx_t fwnet_tx(struct sk_buff *skb, struct net_device *net) 1265c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason{ 1266f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fwnet_header hdr_buf; 1267f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fwnet_device *dev = netdev_priv(net); 1268c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason __be16 proto; 1269c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason u16 dest_node; 1270c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason unsigned max_payload; 1271c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason u16 dg_size; 1272c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason u16 *datagram_label_ptr; 1273f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fwnet_packet_task *ptask; 12745a124d382ea5c97be43c779e4f481455e0287654Stefan Richter struct fwnet_peer *peer; 12755a124d382ea5c97be43c779e4f481455e0287654Stefan Richter unsigned long flags; 1276c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1277b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter spin_lock_irqsave(&dev->lock, flags); 1278b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter 1279b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter /* Can this happen? */ 1280b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter if (netif_queue_stopped(dev->netdev)) { 1281b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter spin_unlock_irqrestore(&dev->lock, flags); 1282b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter 1283b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter return NETDEV_TX_BUSY; 1284b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter } 1285b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter 1286f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter ptask = kmem_cache_alloc(fwnet_packet_task_cache, GFP_ATOMIC); 1287c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason if (ptask == NULL) 1288c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason goto fail; 1289c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1290c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason skb = skb_share_check(skb, GFP_ATOMIC); 1291c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason if (!skb) 1292c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason goto fail; 1293c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1294c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason /* 1295f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter * Make a copy of the driver-specific header. 1296c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * We might need to rebuild the header on tx failure. 1297c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason */ 1298c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason memcpy(&hdr_buf, skb->data, sizeof(hdr_buf)); 1299c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason skb_pull(skb, sizeof(hdr_buf)); 1300c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1301c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason proto = hdr_buf.h_proto; 1302c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason dg_size = skb->len; 1303c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1304c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason /* 1305c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * Set the transmission type for the packet. ARP packets and IP 1306c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * broadcast packets are sent via GASP. 1307c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason */ 1308f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (memcmp(hdr_buf.h_dest, net->broadcast, FWNET_ALEN) == 0 1309c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason || proto == htons(ETH_P_ARP) 1310f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter || (proto == htons(ETH_P_IP) 1311f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter && IN_MULTICAST(ntohl(ip_hdr(skb)->daddr)))) { 13125a124d382ea5c97be43c779e4f481455e0287654Stefan Richter max_payload = dev->broadcast_xmt_max_payload; 1313f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter datagram_label_ptr = &dev->broadcast_xmt_datagramlabel; 1314f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 13155a124d382ea5c97be43c779e4f481455e0287654Stefan Richter ptask->fifo_addr = FWNET_NO_FIFO_ADDR; 13165a124d382ea5c97be43c779e4f481455e0287654Stefan Richter ptask->generation = 0; 13175a124d382ea5c97be43c779e4f481455e0287654Stefan Richter ptask->dest_node = IEEE1394_ALL_NODES; 13185a124d382ea5c97be43c779e4f481455e0287654Stefan Richter ptask->speed = SCODE_100; 1319c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } else { 1320f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter __be64 guid = get_unaligned((__be64 *)hdr_buf.h_dest); 1321c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason u8 generation; 1322c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1323f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter peer = fwnet_peer_find_by_guid(dev, be64_to_cpu(guid)); 13245a124d382ea5c97be43c779e4f481455e0287654Stefan Richter if (!peer || peer->fifo == FWNET_NO_FIFO_ADDR) 1325b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter goto fail; 1326c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 13275a124d382ea5c97be43c779e4f481455e0287654Stefan Richter generation = peer->generation; 13285a124d382ea5c97be43c779e4f481455e0287654Stefan Richter dest_node = peer->node_id; 13295a124d382ea5c97be43c779e4f481455e0287654Stefan Richter max_payload = peer->max_payload; 1330f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter datagram_label_ptr = &peer->datagram_label; 1331c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 13325a124d382ea5c97be43c779e4f481455e0287654Stefan Richter ptask->fifo_addr = peer->fifo; 13335a124d382ea5c97be43c779e4f481455e0287654Stefan Richter ptask->generation = generation; 13345a124d382ea5c97be43c779e4f481455e0287654Stefan Richter ptask->dest_node = dest_node; 13355a124d382ea5c97be43c779e4f481455e0287654Stefan Richter ptask->speed = peer->speed; 1336c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 1337c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1338c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason /* If this is an ARP packet, convert it */ 1339c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason if (proto == htons(ETH_P_ARP)) { 1340c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason struct arphdr *arp = (struct arphdr *)skb->data; 1341c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason unsigned char *arp_ptr = (unsigned char *)(arp + 1); 1342f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct rfc2734_arp *arp1394 = (struct rfc2734_arp *)skb->data; 1343f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter __be32 ipaddr; 1344f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1345f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter ipaddr = get_unaligned((__be32 *)(arp_ptr + FWNET_ALEN)); 1346f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1347f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter arp1394->hw_addr_len = RFC2734_HW_ADDR_LEN; 1348f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter arp1394->max_rec = dev->card->max_receive; 1349f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter arp1394->sspd = dev->card->link_speed; 1350f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1351f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter put_unaligned_be16(dev->local_fifo >> 32, 1352f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter &arp1394->fifo_hi); 1353f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter put_unaligned_be32(dev->local_fifo & 0xffffffff, 1354f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter &arp1394->fifo_lo); 1355f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter put_unaligned(ipaddr, &arp1394->sip); 1356c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 1357c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1358c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason ptask->hdr.w0 = 0; 1359c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason ptask->hdr.w1 = 0; 1360c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason ptask->skb = skb; 1361f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter ptask->dev = dev; 1362f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1363c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason /* Does it all fit in one packet? */ 1364f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (dg_size <= max_payload) { 1365f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fwnet_make_uf_hdr(&ptask->hdr, ntohs(proto)); 1366c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason ptask->outstanding_pkts = 1; 1367f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter max_payload = dg_size + RFC2374_UNFRAG_HDR_SIZE; 1368c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } else { 1369c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason u16 datagram_label; 1370c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1371f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter max_payload -= RFC2374_FRAG_OVERHEAD; 1372c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason datagram_label = (*datagram_label_ptr)++; 1373f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fwnet_make_ff_hdr(&ptask->hdr, ntohs(proto), dg_size, 1374f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter datagram_label); 1375c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason ptask->outstanding_pkts = DIV_ROUND_UP(dg_size, max_payload); 1376f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter max_payload += RFC2374_FRAG_HDR_SIZE; 1377c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 13785a124d382ea5c97be43c779e4f481455e0287654Stefan Richter 1379b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter if (++dev->queued_datagrams == FWNET_MAX_QUEUED_DATAGRAMS) 1380b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter netif_stop_queue(dev->netdev); 138148553011cea504796e513350740781ac6745f556Stefan Richter 13825a124d382ea5c97be43c779e4f481455e0287654Stefan Richter spin_unlock_irqrestore(&dev->lock, flags); 13835a124d382ea5c97be43c779e4f481455e0287654Stefan Richter 1384c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason ptask->max_payload = max_payload; 138548553011cea504796e513350740781ac6745f556Stefan Richter ptask->enqueued = 0; 1386110f82d7a2e0ff5a17617a9672f1ccb7e44bc0c6Stefan Richter 1387f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fwnet_send_packet(ptask); 1388f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1389c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason return NETDEV_TX_OK; 1390c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1391c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason fail: 1392b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter spin_unlock_irqrestore(&dev->lock, flags); 1393b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter 1394c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason if (ptask) 1395f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter kmem_cache_free(fwnet_packet_task_cache, ptask); 1396c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1397c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason if (skb != NULL) 1398c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason dev_kfree_skb(skb); 1399c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1400f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter net->stats.tx_dropped++; 1401f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter net->stats.tx_errors++; 1402c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1403c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason /* 1404c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * FIXME: According to a patch from 2003-02-26, "returning non-zero 1405c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * causes serious problems" here, allegedly. Before that patch, 1406c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * -ERRNO was returned which is not appropriate under Linux 2.6. 1407c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * Perhaps more needs to be done? Stop the queue in serious 1408c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * conditions and restart it elsewhere? 1409c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason */ 1410c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason return NETDEV_TX_OK; 1411c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 1412c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1413f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic int fwnet_change_mtu(struct net_device *net, int new_mtu) 1414f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 1415c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason if (new_mtu < 68) 1416c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason return -EINVAL; 1417c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1418f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter net->mtu = new_mtu; 1419c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason return 0; 1420c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 1421c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 142218bb36f9fab5980efeff063755c037a622f0231cMaxim Levitskystatic const struct ethtool_ops fwnet_ethtool_ops = { 142318bb36f9fab5980efeff063755c037a622f0231cMaxim Levitsky .get_link = ethtool_op_get_link, 142418bb36f9fab5980efeff063755c037a622f0231cMaxim Levitsky}; 142518bb36f9fab5980efeff063755c037a622f0231cMaxim Levitsky 1426f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic const struct net_device_ops fwnet_netdev_ops = { 1427f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter .ndo_open = fwnet_open, 1428f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter .ndo_stop = fwnet_stop, 1429f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter .ndo_start_xmit = fwnet_tx, 1430f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter .ndo_change_mtu = fwnet_change_mtu, 1431c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason}; 1432c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1433f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic void fwnet_init_dev(struct net_device *net) 1434f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 1435f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter net->header_ops = &fwnet_header_ops; 1436f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter net->netdev_ops = &fwnet_netdev_ops; 14371337f8535ac1f41915d9e8aa03d5a3edf2f7c0a5Stefan Richter net->watchdog_timeo = 2 * HZ; 1438f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter net->flags = IFF_BROADCAST | IFF_MULTICAST; 1439f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter net->features = NETIF_F_HIGHDMA; 1440f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter net->addr_len = FWNET_ALEN; 1441f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter net->hard_header_len = FWNET_HLEN; 1442f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter net->type = ARPHRD_IEEE1394; 1443b2268830f5cf29d94b3e4a2af0b795a8f28776feStefan Richter net->tx_queue_len = FWNET_TX_QUEUE_LEN; 144418bb36f9fab5980efeff063755c037a622f0231cMaxim Levitsky net->ethtool_ops = &fwnet_ethtool_ops; 1445c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 1446c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 14475a124d382ea5c97be43c779e4f481455e0287654Stefan Richter/* caller must hold fwnet_device_mutex */ 14485a124d382ea5c97be43c779e4f481455e0287654Stefan Richterstatic struct fwnet_device *fwnet_dev_find(struct fw_card *card) 14495a124d382ea5c97be43c779e4f481455e0287654Stefan Richter{ 14505a124d382ea5c97be43c779e4f481455e0287654Stefan Richter struct fwnet_device *dev; 14515a124d382ea5c97be43c779e4f481455e0287654Stefan Richter 14525a124d382ea5c97be43c779e4f481455e0287654Stefan Richter list_for_each_entry(dev, &fwnet_device_list, dev_link) 14535a124d382ea5c97be43c779e4f481455e0287654Stefan Richter if (dev->card == card) 14545a124d382ea5c97be43c779e4f481455e0287654Stefan Richter return dev; 14555a124d382ea5c97be43c779e4f481455e0287654Stefan Richter 14565a124d382ea5c97be43c779e4f481455e0287654Stefan Richter return NULL; 14575a124d382ea5c97be43c779e4f481455e0287654Stefan Richter} 14585a124d382ea5c97be43c779e4f481455e0287654Stefan Richter 14595a124d382ea5c97be43c779e4f481455e0287654Stefan Richterstatic int fwnet_add_peer(struct fwnet_device *dev, 14605a124d382ea5c97be43c779e4f481455e0287654Stefan Richter struct fw_unit *unit, struct fw_device *device) 14615a124d382ea5c97be43c779e4f481455e0287654Stefan Richter{ 14625a124d382ea5c97be43c779e4f481455e0287654Stefan Richter struct fwnet_peer *peer; 14635a124d382ea5c97be43c779e4f481455e0287654Stefan Richter 14645a124d382ea5c97be43c779e4f481455e0287654Stefan Richter peer = kmalloc(sizeof(*peer), GFP_KERNEL); 14655a124d382ea5c97be43c779e4f481455e0287654Stefan Richter if (!peer) 14665a124d382ea5c97be43c779e4f481455e0287654Stefan Richter return -ENOMEM; 14675a124d382ea5c97be43c779e4f481455e0287654Stefan Richter 1468b01b4babbf204443b5a846a7494546501614cefcStefan Richter dev_set_drvdata(&unit->device, peer); 1469b01b4babbf204443b5a846a7494546501614cefcStefan Richter 14705a124d382ea5c97be43c779e4f481455e0287654Stefan Richter peer->dev = dev; 14715a124d382ea5c97be43c779e4f481455e0287654Stefan Richter peer->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4]; 14725a124d382ea5c97be43c779e4f481455e0287654Stefan Richter peer->fifo = FWNET_NO_FIFO_ADDR; 147374a145049938b73b7e5421423f64a254d4192d3fMaxim Levitsky peer->ip = 0; 14745a124d382ea5c97be43c779e4f481455e0287654Stefan Richter INIT_LIST_HEAD(&peer->pd_list); 14755a124d382ea5c97be43c779e4f481455e0287654Stefan Richter peer->pdg_size = 0; 14765a124d382ea5c97be43c779e4f481455e0287654Stefan Richter peer->datagram_label = 0; 14775a124d382ea5c97be43c779e4f481455e0287654Stefan Richter peer->speed = device->max_speed; 14785a124d382ea5c97be43c779e4f481455e0287654Stefan Richter peer->max_payload = fwnet_max_payload(device->max_rec, peer->speed); 14795a124d382ea5c97be43c779e4f481455e0287654Stefan Richter 14805a124d382ea5c97be43c779e4f481455e0287654Stefan Richter peer->generation = device->generation; 14815a124d382ea5c97be43c779e4f481455e0287654Stefan Richter smp_rmb(); 14825a124d382ea5c97be43c779e4f481455e0287654Stefan Richter peer->node_id = device->node_id; 14835a124d382ea5c97be43c779e4f481455e0287654Stefan Richter 14845a124d382ea5c97be43c779e4f481455e0287654Stefan Richter spin_lock_irq(&dev->lock); 14855a124d382ea5c97be43c779e4f481455e0287654Stefan Richter list_add_tail(&peer->peer_link, &dev->peer_list); 148618bb36f9fab5980efeff063755c037a622f0231cMaxim Levitsky dev->peer_count++; 1487c16714704bb35165e5b85d927873dcc643772648Stefan Richter set_carrier_state(dev); 14885a124d382ea5c97be43c779e4f481455e0287654Stefan Richter spin_unlock_irq(&dev->lock); 14895a124d382ea5c97be43c779e4f481455e0287654Stefan Richter 14905a124d382ea5c97be43c779e4f481455e0287654Stefan Richter return 0; 14915a124d382ea5c97be43c779e4f481455e0287654Stefan Richter} 14925a124d382ea5c97be43c779e4f481455e0287654Stefan Richter 1493f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic int fwnet_probe(struct device *_dev) 1494f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 1495f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fw_unit *unit = fw_unit(_dev); 1496f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fw_device *device = fw_parent_device(unit); 1497f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fw_card *card = device->card; 1498f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct net_device *net; 1499b01b4babbf204443b5a846a7494546501614cefcStefan Richter bool allocated_netdev = false; 1500f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fwnet_device *dev; 1501c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason unsigned max_mtu; 15025a124d382ea5c97be43c779e4f481455e0287654Stefan Richter int ret; 1503c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 15045a124d382ea5c97be43c779e4f481455e0287654Stefan Richter mutex_lock(&fwnet_device_mutex); 1505c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 15065a124d382ea5c97be43c779e4f481455e0287654Stefan Richter dev = fwnet_dev_find(card); 15075a124d382ea5c97be43c779e4f481455e0287654Stefan Richter if (dev) { 15085a124d382ea5c97be43c779e4f481455e0287654Stefan Richter net = dev->netdev; 15095a124d382ea5c97be43c779e4f481455e0287654Stefan Richter goto have_dev; 1510c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 15115a124d382ea5c97be43c779e4f481455e0287654Stefan Richter 1512f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter net = alloc_netdev(sizeof(*dev), "firewire%d", fwnet_init_dev); 1513f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (net == NULL) { 15145a124d382ea5c97be43c779e4f481455e0287654Stefan Richter ret = -ENOMEM; 1515c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason goto out; 1516c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 1517c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1518b01b4babbf204443b5a846a7494546501614cefcStefan Richter allocated_netdev = true; 1519f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter SET_NETDEV_DEV(net, card->device); 1520f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dev = netdev_priv(net); 1521c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1522f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter spin_lock_init(&dev->lock); 1523f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dev->broadcast_state = FWNET_BROADCAST_ERROR; 1524f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dev->broadcast_rcv_context = NULL; 1525f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dev->broadcast_xmt_max_payload = 0; 1526f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dev->broadcast_xmt_datagramlabel = 0; 1527f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dev->local_fifo = FWNET_NO_FIFO_ADDR; 152848553011cea504796e513350740781ac6745f556Stefan Richter dev->queued_datagrams = 0; 15295a124d382ea5c97be43c779e4f481455e0287654Stefan Richter INIT_LIST_HEAD(&dev->peer_list); 1530f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dev->card = card; 15315a124d382ea5c97be43c779e4f481455e0287654Stefan Richter dev->netdev = net; 1532c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1533c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason /* 1534c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * Use the RFC 2734 default 1500 octets or the maximum payload 1535c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason * as initial MTU 1536c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason */ 1537c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason max_mtu = (1 << (card->max_receive + 1)) 1538f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter - sizeof(struct rfc2734_header) - IEEE1394_GASP_HDR_SIZE; 1539f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter net->mtu = min(1500U, max_mtu); 1540c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1541c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason /* Set our hardware address while we're at it */ 1542f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter put_unaligned_be64(card->guid, net->dev_addr); 1543f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter put_unaligned_be64(~0ULL, net->broadcast); 15445a124d382ea5c97be43c779e4f481455e0287654Stefan Richter ret = register_netdev(net); 15458408dc1c14c113face77f6f967af98f76999989fStefan Richter if (ret) 1546c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason goto out; 1547c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 15485a124d382ea5c97be43c779e4f481455e0287654Stefan Richter list_add_tail(&dev->dev_link, &fwnet_device_list); 15498408dc1c14c113face77f6f967af98f76999989fStefan Richter dev_notice(&net->dev, "IPv4 over IEEE 1394 on card %s\n", 15508408dc1c14c113face77f6f967af98f76999989fStefan Richter dev_name(card->device)); 15515a124d382ea5c97be43c779e4f481455e0287654Stefan Richter have_dev: 15525a124d382ea5c97be43c779e4f481455e0287654Stefan Richter ret = fwnet_add_peer(dev, unit, device); 1553b01b4babbf204443b5a846a7494546501614cefcStefan Richter if (ret && allocated_netdev) { 15545a124d382ea5c97be43c779e4f481455e0287654Stefan Richter unregister_netdev(net); 15555a124d382ea5c97be43c779e4f481455e0287654Stefan Richter list_del(&dev->dev_link); 15565a124d382ea5c97be43c779e4f481455e0287654Stefan Richter } 1557c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason out: 1558b01b4babbf204443b5a846a7494546501614cefcStefan Richter if (ret && allocated_netdev) 1559f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter free_netdev(net); 1560f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 15615a124d382ea5c97be43c779e4f481455e0287654Stefan Richter mutex_unlock(&fwnet_device_mutex); 15625a124d382ea5c97be43c779e4f481455e0287654Stefan Richter 15635a124d382ea5c97be43c779e4f481455e0287654Stefan Richter return ret; 15645a124d382ea5c97be43c779e4f481455e0287654Stefan Richter} 15655a124d382ea5c97be43c779e4f481455e0287654Stefan Richter 1566c16714704bb35165e5b85d927873dcc643772648Stefan Richterstatic void fwnet_remove_peer(struct fwnet_peer *peer, struct fwnet_device *dev) 15675a124d382ea5c97be43c779e4f481455e0287654Stefan Richter{ 15685a124d382ea5c97be43c779e4f481455e0287654Stefan Richter struct fwnet_partial_datagram *pd, *pd_next; 15695a124d382ea5c97be43c779e4f481455e0287654Stefan Richter 1570c16714704bb35165e5b85d927873dcc643772648Stefan Richter spin_lock_irq(&dev->lock); 15715a124d382ea5c97be43c779e4f481455e0287654Stefan Richter list_del(&peer->peer_link); 1572c16714704bb35165e5b85d927873dcc643772648Stefan Richter dev->peer_count--; 1573c16714704bb35165e5b85d927873dcc643772648Stefan Richter set_carrier_state(dev); 1574c16714704bb35165e5b85d927873dcc643772648Stefan Richter spin_unlock_irq(&dev->lock); 15755a124d382ea5c97be43c779e4f481455e0287654Stefan Richter 15765a124d382ea5c97be43c779e4f481455e0287654Stefan Richter list_for_each_entry_safe(pd, pd_next, &peer->pd_list, pd_link) 15775a124d382ea5c97be43c779e4f481455e0287654Stefan Richter fwnet_pd_delete(pd); 15785a124d382ea5c97be43c779e4f481455e0287654Stefan Richter 15795a124d382ea5c97be43c779e4f481455e0287654Stefan Richter kfree(peer); 1580c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 1581c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1582f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic int fwnet_remove(struct device *_dev) 1583f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 1584b01b4babbf204443b5a846a7494546501614cefcStefan Richter struct fwnet_peer *peer = dev_get_drvdata(_dev); 15855a124d382ea5c97be43c779e4f481455e0287654Stefan Richter struct fwnet_device *dev = peer->dev; 1586f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct net_device *net; 158748553011cea504796e513350740781ac6745f556Stefan Richter int i; 1588f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 15895a124d382ea5c97be43c779e4f481455e0287654Stefan Richter mutex_lock(&fwnet_device_mutex); 1590c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 159174a145049938b73b7e5421423f64a254d4192d3fMaxim Levitsky net = dev->netdev; 159274a145049938b73b7e5421423f64a254d4192d3fMaxim Levitsky if (net && peer->ip) 159374a145049938b73b7e5421423f64a254d4192d3fMaxim Levitsky arp_invalidate(net, peer->ip); 159474a145049938b73b7e5421423f64a254d4192d3fMaxim Levitsky 1595c16714704bb35165e5b85d927873dcc643772648Stefan Richter fwnet_remove_peer(peer, dev); 159618bb36f9fab5980efeff063755c037a622f0231cMaxim Levitsky 15975a124d382ea5c97be43c779e4f481455e0287654Stefan Richter if (list_empty(&dev->peer_list)) { 1598f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter unregister_netdev(net); 1599f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1600f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (dev->local_fifo != FWNET_NO_FIFO_ADDR) 1601f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fw_core_remove_address_handler(&dev->handler); 1602f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (dev->broadcast_rcv_context) { 1603f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fw_iso_context_stop(dev->broadcast_rcv_context); 1604f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fw_iso_buffer_destroy(&dev->broadcast_rcv_buffer, 1605f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter dev->card); 1606f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fw_iso_context_destroy(dev->broadcast_rcv_context); 1607c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 160848553011cea504796e513350740781ac6745f556Stefan Richter for (i = 0; dev->queued_datagrams && i < 5; i++) 160948553011cea504796e513350740781ac6745f556Stefan Richter ssleep(1); 161048553011cea504796e513350740781ac6745f556Stefan Richter WARN_ON(dev->queued_datagrams); 1611b01b4babbf204443b5a846a7494546501614cefcStefan Richter list_del(&dev->dev_link); 1612b01b4babbf204443b5a846a7494546501614cefcStefan Richter 1613f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter free_netdev(net); 1614c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason } 1615f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 16165a124d382ea5c97be43c779e4f481455e0287654Stefan Richter mutex_unlock(&fwnet_device_mutex); 16175a124d382ea5c97be43c779e4f481455e0287654Stefan Richter 1618c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason return 0; 1619c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 1620c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1621f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter/* 1622f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter * FIXME abort partially sent fragmented datagrams, 1623f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter * discard partially received fragmented datagrams 1624f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter */ 1625f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic void fwnet_update(struct fw_unit *unit) 1626f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 1627f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter struct fw_device *device = fw_parent_device(unit); 1628b01b4babbf204443b5a846a7494546501614cefcStefan Richter struct fwnet_peer *peer = dev_get_drvdata(&unit->device); 16295a124d382ea5c97be43c779e4f481455e0287654Stefan Richter int generation; 1630c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 16315a124d382ea5c97be43c779e4f481455e0287654Stefan Richter generation = device->generation; 16325a124d382ea5c97be43c779e4f481455e0287654Stefan Richter 16335a124d382ea5c97be43c779e4f481455e0287654Stefan Richter spin_lock_irq(&peer->dev->lock); 16345a124d382ea5c97be43c779e4f481455e0287654Stefan Richter peer->node_id = device->node_id; 16355a124d382ea5c97be43c779e4f481455e0287654Stefan Richter peer->generation = generation; 16365a124d382ea5c97be43c779e4f481455e0287654Stefan Richter spin_unlock_irq(&peer->dev->lock); 1637c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 1638c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1639f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic const struct ieee1394_device_id fwnet_id_table[] = { 1640f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter { 1641f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter .match_flags = IEEE1394_MATCH_SPECIFIER_ID | 1642f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter IEEE1394_MATCH_VERSION, 1643f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter .specifier_id = IANA_SPECIFIER_ID, 1644f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter .version = RFC2734_SW_VERSION, 1645f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter }, 1646f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter { } 1647f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter}; 1648f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1649f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic struct fw_driver fwnet_driver = { 1650c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason .driver = { 1651f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter .owner = THIS_MODULE, 165259759ff6f151dab70cc227c337fc54da221cf8d7Stefan Richter .name = KBUILD_MODNAME, 1653f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter .bus = &fw_bus_type, 1654f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter .probe = fwnet_probe, 1655f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter .remove = fwnet_remove, 1656c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason }, 1657f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter .update = fwnet_update, 1658f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter .id_table = fwnet_id_table, 1659f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter}; 1660f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1661f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic const u32 rfc2374_unit_directory_data[] = { 1662f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 0x00040000, /* directory_length */ 1663f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 0x1200005e, /* unit_specifier_id: IANA */ 1664f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 0x81000003, /* textual descriptor offset */ 1665f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 0x13000001, /* unit_sw_version: RFC 2734 */ 1666f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 0x81000005, /* textual descriptor offset */ 1667f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 0x00030000, /* descriptor_length */ 1668f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 0x00000000, /* text */ 1669f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 0x00000000, /* minimal ASCII, en */ 1670f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 0x49414e41, /* I A N A */ 1671f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 0x00030000, /* descriptor_length */ 1672f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 0x00000000, /* text */ 1673f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 0x00000000, /* minimal ASCII, en */ 1674f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 0x49507634, /* I P v 4 */ 1675f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter}; 1676f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1677f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic struct fw_descriptor rfc2374_unit_directory = { 1678f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter .length = ARRAY_SIZE(rfc2374_unit_directory_data), 1679f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter .key = (CSR_DIRECTORY | CSR_UNIT) << 24, 1680f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter .data = rfc2374_unit_directory_data 1681c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason}; 1682c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1683f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic int __init fwnet_init(void) 1684f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 1685f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter int err; 1686f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1687f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter err = fw_core_add_descriptor(&rfc2374_unit_directory); 1688f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (err) 1689f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter return err; 1690c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1691f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fwnet_packet_task_cache = kmem_cache_create("packet_task", 1692f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter sizeof(struct fwnet_packet_task), 0, 0, NULL); 1693f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (!fwnet_packet_task_cache) { 1694f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter err = -ENOMEM; 1695f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter goto out; 1696f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter } 1697f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1698f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter err = driver_register(&fwnet_driver.driver); 1699f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter if (!err) 1700f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter return 0; 1701f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1702f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter kmem_cache_destroy(fwnet_packet_task_cache); 1703f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterout: 1704f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fw_core_remove_descriptor(&rfc2374_unit_directory); 1705f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter 1706f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter return err; 1707c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 1708f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richtermodule_init(fwnet_init); 1709c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1710f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richterstatic void __exit fwnet_cleanup(void) 1711f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter{ 1712f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter driver_unregister(&fwnet_driver.driver); 1713f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter kmem_cache_destroy(fwnet_packet_task_cache); 1714f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richter fw_core_remove_descriptor(&rfc2374_unit_directory); 1715c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason} 1716f91e3bd842ec6f5cea245993926ee8ff26250467Stefan Richtermodule_exit(fwnet_cleanup); 1717c76acec6d55107b652a37c90b36c00bc8b04dabbJay Fenlason 1718f91e3bd842ec6f5cea245993926ee8ff26250467Stefan RichterMODULE_AUTHOR("Jay Fenlason <fenlason@redhat.com>"); 1719f91e3bd842ec6f5cea245993926ee8ff26250467Stefan RichterMODULE_DESCRIPTION("IPv4 over IEEE1394 as per RFC 2734"); 1720f91e3bd842ec6f5cea245993926ee8ff26250467Stefan RichterMODULE_LICENSE("GPL"); 1721f91e3bd842ec6f5cea245993926ee8ff26250467Stefan RichterMODULE_DEVICE_TABLE(ieee1394, fwnet_id_table); 1722