Jay Fenlason | c76acec | 2009-05-18 13:08:06 -0400 | [diff] [blame] | 1 | /* |
| 2 | * IPv4 over IEEE 1394, per RFC 2734 |
| 3 | * |
| 4 | * Copyright (C) 2009 Jay Fenlason <fenlason@redhat.com> |
| 5 | * |
| 6 | * based on eth1394 by Ben Collins et al |
| 7 | */ |
| 8 | |
| 9 | #include <linux/device.h> |
| 10 | #include <linux/ethtool.h> |
| 11 | #include <linux/firewire.h> |
| 12 | #include <linux/firewire-constants.h> |
| 13 | #include <linux/highmem.h> |
| 14 | #include <linux/in.h> |
| 15 | #include <linux/ip.h> |
| 16 | #include <linux/mod_devicetable.h> |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/moduleparam.h> |
| 19 | #include <linux/netdevice.h> |
| 20 | #include <linux/skbuff.h> |
| 21 | |
| 22 | #include <asm/unaligned.h> |
| 23 | #include <net/arp.h> |
| 24 | |
| 25 | /* Things to potentially make runtime cofigurable */ |
| 26 | /* must be at least as large as our maximum receive size */ |
| 27 | #define FIFO_SIZE 4096 |
| 28 | /* Network timeout in glibbles */ |
| 29 | #define IPV4_TIMEOUT 100000 |
| 30 | |
| 31 | /* Runitme configurable paramaters */ |
| 32 | static int ipv4_mpd = 25; |
| 33 | static int ipv4_max_xmt = 0; |
| 34 | /* 16k for receiving arp and broadcast packets. Enough? */ |
| 35 | static int ipv4_iso_page_count = 4; |
| 36 | |
| 37 | MODULE_AUTHOR("Jay Fenlason (fenlason@redhat.com)"); |
| 38 | MODULE_DESCRIPTION("Firewire IPv4 Driver (IPv4-over-IEEE1394 as per RFC 2734)"); |
| 39 | MODULE_LICENSE("GPL"); |
| 40 | MODULE_DEVICE_TABLE(ieee1394, ipv4_id_table); |
| 41 | module_param_named(max_partial_datagrams, ipv4_mpd, int, S_IRUGO | S_IWUSR); |
| 42 | MODULE_PARM_DESC(max_partial_datagrams, "Maximum number of received" |
| 43 | " incomplete fragmented datagrams (default = 25)."); |
| 44 | |
| 45 | /* Max xmt is useful for forcing fragmentation, which makes testing easier. */ |
| 46 | module_param_named(max_transmit, ipv4_max_xmt, int, S_IRUGO | S_IWUSR); |
| 47 | MODULE_PARM_DESC(max_transmit, "Maximum datagram size to transmit" |
| 48 | " (larger datagrams will be fragmented) (default = 0 (use hardware defaults)."); |
| 49 | |
| 50 | /* iso page count controls how many pages will be used for receiving broadcast packets. */ |
| 51 | module_param_named(iso_pages, ipv4_iso_page_count, int, S_IRUGO | S_IWUSR); |
| 52 | MODULE_PARM_DESC(iso_pages, "Number of pages to use for receiving broadcast packets" |
| 53 | " (default = 4)."); |
| 54 | |
| 55 | /* uncomment this line to do debugging */ |
| 56 | #define fw_debug(s, args...) printk(KERN_DEBUG KBUILD_MODNAME ": " s, ## args) |
| 57 | |
| 58 | /* comment out these lines to do debugging. */ |
| 59 | /* #undef fw_debug */ |
| 60 | /* #define fw_debug(s...) */ |
| 61 | /* #define print_hex_dump(l...) */ |
| 62 | |
| 63 | /* Define a fake hardware header format for the networking core. Note that |
| 64 | * header size cannot exceed 16 bytes as that is the size of the header cache. |
| 65 | * Also, we do not need the source address in the header so we omit it and |
| 66 | * keep the header to under 16 bytes */ |
| 67 | #define IPV4_ALEN (8) |
| 68 | /* This must equal sizeof(struct ipv4_ether_hdr) */ |
| 69 | #define IPV4_HLEN (10) |
| 70 | |
| 71 | /* FIXME: what's a good size for this? */ |
| 72 | #define INVALID_FIFO_ADDR (u64)~0ULL |
| 73 | |
| 74 | /* Things specified by standards */ |
| 75 | #define BROADCAST_CHANNEL 31 |
| 76 | |
| 77 | #define S100_BUFFER_SIZE 512 |
| 78 | #define MAX_BUFFER_SIZE 4096 |
| 79 | |
| 80 | #define IPV4_GASP_SPECIFIER_ID 0x00005EU |
| 81 | #define IPV4_GASP_VERSION 0x00000001U |
| 82 | |
| 83 | #define IPV4_GASP_OVERHEAD (2 * sizeof(u32)) /* for GASP header */ |
| 84 | |
| 85 | #define IPV4_UNFRAG_HDR_SIZE sizeof(u32) |
| 86 | #define IPV4_FRAG_HDR_SIZE (2 * sizeof(u32)) |
| 87 | #define IPV4_FRAG_OVERHEAD sizeof(u32) |
| 88 | |
| 89 | #define ALL_NODES (0xffc0 | 0x003f) |
| 90 | |
| 91 | #define IPV4_HDR_UNFRAG 0 /* unfragmented */ |
| 92 | #define IPV4_HDR_FIRSTFRAG 1 /* first fragment */ |
| 93 | #define IPV4_HDR_LASTFRAG 2 /* last fragment */ |
| 94 | #define IPV4_HDR_INTFRAG 3 /* interior fragment */ |
| 95 | |
| 96 | /* Our arp packet (ARPHRD_IEEE1394) */ |
| 97 | /* FIXME: note that this is probably bogus on weird-endian machines */ |
| 98 | struct ipv4_arp { |
| 99 | u16 hw_type; /* 0x0018 */ |
| 100 | u16 proto_type; /* 0x0806 */ |
| 101 | u8 hw_addr_len; /* 16 */ |
| 102 | u8 ip_addr_len; /* 4 */ |
| 103 | u16 opcode; /* ARP Opcode */ |
| 104 | /* Above is exactly the same format as struct arphdr */ |
| 105 | |
| 106 | u64 s_uniq_id; /* Sender's 64bit EUI */ |
| 107 | u8 max_rec; /* Sender's max packet size */ |
| 108 | u8 sspd; /* Sender's max speed */ |
| 109 | u16 fifo_hi; /* hi 16bits of sender's FIFO addr */ |
| 110 | u32 fifo_lo; /* lo 32bits of sender's FIFO addr */ |
| 111 | u32 sip; /* Sender's IP Address */ |
| 112 | u32 tip; /* IP Address of requested hw addr */ |
| 113 | } __attribute__((packed)); |
| 114 | |
| 115 | struct ipv4_ether_hdr { |
| 116 | unsigned char h_dest[IPV4_ALEN]; /* destination address */ |
| 117 | unsigned short h_proto; /* packet type ID field */ |
| 118 | } __attribute__((packed)); |
| 119 | |
| 120 | static inline struct ipv4_ether_hdr *ipv4_ether_hdr(const struct sk_buff *skb) |
| 121 | { |
| 122 | return (struct ipv4_ether_hdr *)skb_mac_header(skb); |
| 123 | } |
| 124 | |
| 125 | enum ipv4_tx_type { |
| 126 | IPV4_UNKNOWN = 0, |
| 127 | IPV4_GASP = 1, |
| 128 | IPV4_WRREQ = 2, |
| 129 | }; |
| 130 | |
| 131 | enum ipv4_broadcast_state { |
| 132 | IPV4_BROADCAST_ERROR, |
| 133 | IPV4_BROADCAST_RUNNING, |
| 134 | IPV4_BROADCAST_STOPPED, |
| 135 | }; |
| 136 | |
| 137 | #define ipv4_get_hdr_lf(h) (((h)->w0&0xC0000000)>>30) |
| 138 | #define ipv4_get_hdr_ether_type(h) (((h)->w0&0x0000FFFF) ) |
| 139 | #define ipv4_get_hdr_dg_size(h) (((h)->w0&0x0FFF0000)>>16) |
| 140 | #define ipv4_get_hdr_fg_off(h) (((h)->w0&0x00000FFF) ) |
| 141 | #define ipv4_get_hdr_dgl(h) (((h)->w1&0xFFFF0000)>>16) |
| 142 | |
| 143 | #define ipv4_set_hdr_lf(lf) (( lf)<<30) |
| 144 | #define ipv4_set_hdr_ether_type(et) (( et) ) |
| 145 | #define ipv4_set_hdr_dg_size(dgs) ((dgs)<<16) |
| 146 | #define ipv4_set_hdr_fg_off(fgo) ((fgo) ) |
| 147 | |
| 148 | #define ipv4_set_hdr_dgl(dgl) ((dgl)<<16) |
| 149 | |
| 150 | struct ipv4_hdr { |
| 151 | u32 w0; |
| 152 | u32 w1; |
| 153 | }; |
| 154 | |
| 155 | static inline void ipv4_make_uf_hdr( struct ipv4_hdr *hdr, unsigned ether_type) { |
| 156 | hdr->w0 = ipv4_set_hdr_lf(IPV4_HDR_UNFRAG) |
| 157 | |ipv4_set_hdr_ether_type(ether_type); |
| 158 | fw_debug ( "Setting unfragmented header %p to %x\n", hdr, hdr->w0 ); |
| 159 | } |
| 160 | |
| 161 | static inline void ipv4_make_ff_hdr ( struct ipv4_hdr *hdr, unsigned ether_type, unsigned dg_size, unsigned dgl ) { |
| 162 | hdr->w0 = ipv4_set_hdr_lf(IPV4_HDR_FIRSTFRAG) |
| 163 | |ipv4_set_hdr_dg_size(dg_size) |
| 164 | |ipv4_set_hdr_ether_type(ether_type); |
| 165 | hdr->w1 = ipv4_set_hdr_dgl(dgl); |
| 166 | fw_debug ( "Setting fragmented header %p to first_frag %x,%x (et %x, dgs %x, dgl %x)\n", hdr, hdr->w0, hdr->w1, |
| 167 | ether_type, dg_size, dgl ); |
| 168 | } |
| 169 | |
| 170 | static inline void ipv4_make_sf_hdr ( struct ipv4_hdr *hdr, unsigned lf, unsigned dg_size, unsigned fg_off, unsigned dgl) { |
| 171 | hdr->w0 = ipv4_set_hdr_lf(lf) |
| 172 | |ipv4_set_hdr_dg_size(dg_size) |
| 173 | |ipv4_set_hdr_fg_off(fg_off); |
| 174 | hdr->w1 = ipv4_set_hdr_dgl(dgl); |
| 175 | fw_debug ( "Setting fragmented header %p to %x,%x (lf %x, dgs %x, fo %x dgl %x)\n", |
| 176 | hdr, hdr->w0, hdr->w1, |
| 177 | lf, dg_size, fg_off, dgl ); |
| 178 | } |
| 179 | |
| 180 | /* End of IP1394 headers */ |
| 181 | |
| 182 | /* Fragment types */ |
| 183 | #define ETH1394_HDR_LF_UF 0 /* unfragmented */ |
| 184 | #define ETH1394_HDR_LF_FF 1 /* first fragment */ |
| 185 | #define ETH1394_HDR_LF_LF 2 /* last fragment */ |
| 186 | #define ETH1394_HDR_LF_IF 3 /* interior fragment */ |
| 187 | |
| 188 | #define IP1394_HW_ADDR_LEN 16 /* As per RFC */ |
| 189 | |
| 190 | /* This list keeps track of what parts of the datagram have been filled in */ |
| 191 | struct ipv4_fragment_info { |
| 192 | struct list_head fragment_info; |
| 193 | u16 offset; |
| 194 | u16 len; |
| 195 | }; |
| 196 | |
| 197 | struct ipv4_partial_datagram { |
| 198 | struct list_head pdg_list; |
| 199 | struct list_head fragment_info; |
| 200 | struct sk_buff *skb; |
| 201 | /* FIXME Why not use skb->data? */ |
| 202 | char *pbuf; |
| 203 | u16 datagram_label; |
| 204 | u16 ether_type; |
| 205 | u16 datagram_size; |
| 206 | }; |
| 207 | |
| 208 | /* |
| 209 | * We keep one of these for each IPv4 capable device attached to a fw_card. |
| 210 | * The list of them is stored in the fw_card structure rather than in the |
| 211 | * ipv4_priv because the remote IPv4 nodes may be probed before the card is, |
| 212 | * so we need a place to store them before the ipv4_priv structure is |
| 213 | * allocated. |
| 214 | */ |
| 215 | struct ipv4_node { |
| 216 | struct list_head ipv4_nodes; |
| 217 | /* guid of the remote node */ |
| 218 | u64 guid; |
| 219 | /* FIFO address to transmit datagrams to, or INVALID_FIFO_ADDR */ |
| 220 | u64 fifo; |
| 221 | |
| 222 | spinlock_t pdg_lock; /* partial datagram lock */ |
| 223 | /* List of partial datagrams received from this node */ |
| 224 | struct list_head pdg_list; |
| 225 | /* Number of entries in pdg_list at the moment */ |
| 226 | unsigned pdg_size; |
| 227 | |
| 228 | /* max payload to transmit to this remote node */ |
| 229 | /* This already includes the IPV4_FRAG_HDR_SIZE overhead */ |
| 230 | u16 max_payload; |
| 231 | /* outgoing datagram label */ |
| 232 | u16 datagram_label; |
| 233 | /* Current node_id of the remote node */ |
| 234 | u16 nodeid; |
| 235 | /* current generation of the remote node */ |
| 236 | u8 generation; |
| 237 | /* max speed that this node can receive at */ |
| 238 | u8 xmt_speed; |
| 239 | }; |
| 240 | |
| 241 | struct ipv4_priv { |
| 242 | spinlock_t lock; |
| 243 | |
| 244 | enum ipv4_broadcast_state broadcast_state; |
| 245 | struct fw_iso_context *broadcast_rcv_context; |
| 246 | struct fw_iso_buffer broadcast_rcv_buffer; |
| 247 | void **broadcast_rcv_buffer_ptrs; |
| 248 | unsigned broadcast_rcv_next_ptr; |
| 249 | unsigned num_broadcast_rcv_ptrs; |
| 250 | unsigned rcv_buffer_size; |
| 251 | /* |
| 252 | * This value is the maximum unfragmented datagram size that can be |
| 253 | * sent by the hardware. It already has the GASP overhead and the |
| 254 | * unfragmented datagram header overhead calculated into it. |
| 255 | */ |
| 256 | unsigned broadcast_xmt_max_payload; |
| 257 | u16 broadcast_xmt_datagramlabel; |
| 258 | |
| 259 | /* |
| 260 | * The csr address that remote nodes must send datagrams to for us to |
| 261 | * receive them. |
| 262 | */ |
| 263 | struct fw_address_handler handler; |
| 264 | u64 local_fifo; |
| 265 | |
| 266 | /* Wake up to xmt */ |
| 267 | /* struct work_struct wake;*/ |
| 268 | /* List of packets to be sent */ |
| 269 | struct list_head packet_list; |
| 270 | /* |
| 271 | * List of packets that were broadcasted. When we get an ISO interrupt |
| 272 | * one of them has been sent |
| 273 | */ |
| 274 | struct list_head broadcasted_list; |
| 275 | /* List of packets that have been sent but not yet acked */ |
| 276 | struct list_head sent_list; |
| 277 | |
| 278 | struct fw_card *card; |
| 279 | }; |
| 280 | |
| 281 | /* This is our task struct. It's used for the packet complete callback. */ |
| 282 | struct ipv4_packet_task { |
| 283 | /* |
| 284 | * ptask can actually be on priv->packet_list, priv->broadcasted_list, |
| 285 | * or priv->sent_list depending on its current state. |
| 286 | */ |
| 287 | struct list_head packet_list; |
| 288 | struct fw_transaction transaction; |
| 289 | struct ipv4_hdr hdr; |
| 290 | struct sk_buff *skb; |
| 291 | struct ipv4_priv *priv; |
| 292 | enum ipv4_tx_type tx_type; |
| 293 | int outstanding_pkts; |
| 294 | unsigned max_payload; |
| 295 | u64 fifo_addr; |
| 296 | u16 dest_node; |
| 297 | u8 generation; |
| 298 | u8 speed; |
| 299 | }; |
| 300 | |
| 301 | static struct kmem_cache *ipv4_packet_task_cache; |
| 302 | |
| 303 | static const char ipv4_driver_name[] = "firewire-ipv4"; |
| 304 | |
| 305 | static const struct ieee1394_device_id ipv4_id_table[] = { |
| 306 | { |
| 307 | .match_flags = IEEE1394_MATCH_SPECIFIER_ID | |
| 308 | IEEE1394_MATCH_VERSION, |
| 309 | .specifier_id = IPV4_GASP_SPECIFIER_ID, |
| 310 | .version = IPV4_GASP_VERSION, |
| 311 | }, |
| 312 | { } |
| 313 | }; |
| 314 | |
| 315 | static u32 ipv4_unit_directory_data[] = { |
| 316 | 0x00040000, /* unit directory */ |
| 317 | 0x12000000 | IPV4_GASP_SPECIFIER_ID, /* specifier ID */ |
| 318 | 0x81000003, /* text descriptor */ |
| 319 | 0x13000000 | IPV4_GASP_VERSION, /* version */ |
| 320 | 0x81000005, /* text descriptor */ |
| 321 | |
| 322 | 0x00030000, /* Three quadlets */ |
| 323 | 0x00000000, /* Text */ |
| 324 | 0x00000000, /* Language 0 */ |
| 325 | 0x49414e41, /* I A N A */ |
| 326 | 0x00030000, /* Three quadlets */ |
| 327 | 0x00000000, /* Text */ |
| 328 | 0x00000000, /* Language 0 */ |
| 329 | 0x49507634, /* I P v 4 */ |
| 330 | }; |
| 331 | |
| 332 | static struct fw_descriptor ipv4_unit_directory = { |
| 333 | .length = ARRAY_SIZE(ipv4_unit_directory_data), |
| 334 | .key = 0xd1000000, |
| 335 | .data = ipv4_unit_directory_data |
| 336 | }; |
| 337 | |
| 338 | static int ipv4_send_packet(struct ipv4_packet_task *ptask ); |
| 339 | |
| 340 | /* ------------------------------------------------------------------ */ |
| 341 | /****************************************** |
| 342 | * HW Header net device functions |
| 343 | ******************************************/ |
| 344 | /* These functions have been adapted from net/ethernet/eth.c */ |
| 345 | |
| 346 | /* Create a fake MAC header for an arbitrary protocol layer. |
| 347 | * saddr=NULL means use device source address |
| 348 | * daddr=NULL means leave destination address (eg unresolved arp). */ |
| 349 | |
| 350 | static int ipv4_header ( struct sk_buff *skb, struct net_device *dev, |
| 351 | unsigned short type, const void *daddr, |
| 352 | const void *saddr, unsigned len) { |
| 353 | struct ipv4_ether_hdr *eth; |
| 354 | |
| 355 | eth = (struct ipv4_ether_hdr *)skb_push(skb, sizeof(*eth)); |
| 356 | eth->h_proto = htons(type); |
| 357 | |
| 358 | if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) { |
| 359 | memset(eth->h_dest, 0, dev->addr_len); |
| 360 | return dev->hard_header_len; |
| 361 | } |
| 362 | |
| 363 | if (daddr) { |
| 364 | memcpy(eth->h_dest, daddr, dev->addr_len); |
| 365 | return dev->hard_header_len; |
| 366 | } |
| 367 | |
| 368 | return -dev->hard_header_len; |
| 369 | } |
| 370 | |
| 371 | /* Rebuild the faked MAC header. This is called after an ARP |
| 372 | * (or in future other address resolution) has completed on this |
| 373 | * sk_buff. We now let ARP fill in the other fields. |
| 374 | * |
| 375 | * This routine CANNOT use cached dst->neigh! |
| 376 | * Really, it is used only when dst->neigh is wrong. |
| 377 | */ |
| 378 | |
| 379 | static int ipv4_rebuild_header(struct sk_buff *skb) |
| 380 | { |
| 381 | struct ipv4_ether_hdr *eth; |
| 382 | |
| 383 | eth = (struct ipv4_ether_hdr *)skb->data; |
| 384 | if (eth->h_proto == htons(ETH_P_IP)) |
| 385 | return arp_find((unsigned char *)ð->h_dest, skb); |
| 386 | |
| 387 | fw_notify ( "%s: unable to resolve type %04x addresses\n", |
| 388 | skb->dev->name,ntohs(eth->h_proto) ); |
| 389 | return 0; |
| 390 | } |
| 391 | |
| 392 | static int ipv4_header_cache(const struct neighbour *neigh, struct hh_cache *hh) { |
| 393 | unsigned short type = hh->hh_type; |
| 394 | struct net_device *dev; |
| 395 | struct ipv4_ether_hdr *eth; |
| 396 | |
| 397 | if (type == htons(ETH_P_802_3)) |
| 398 | return -1; |
| 399 | dev = neigh->dev; |
| 400 | eth = (struct ipv4_ether_hdr *)((u8 *)hh->hh_data + 16 - sizeof(*eth)); |
| 401 | eth->h_proto = type; |
| 402 | memcpy(eth->h_dest, neigh->ha, dev->addr_len); |
| 403 | |
| 404 | hh->hh_len = IPV4_HLEN; |
| 405 | return 0; |
| 406 | } |
| 407 | |
| 408 | /* Called by Address Resolution module to notify changes in address. */ |
| 409 | static void ipv4_header_cache_update(struct hh_cache *hh, const struct net_device *dev, const unsigned char * haddr ) { |
| 410 | memcpy((u8 *)hh->hh_data + 16 - IPV4_HLEN, haddr, dev->addr_len); |
| 411 | } |
| 412 | |
| 413 | static int ipv4_header_parse(const struct sk_buff *skb, unsigned char *haddr) { |
| 414 | memcpy(haddr, skb->dev->dev_addr, IPV4_ALEN); |
| 415 | return IPV4_ALEN; |
| 416 | } |
| 417 | |
| 418 | static const struct header_ops ipv4_header_ops = { |
| 419 | .create = ipv4_header, |
| 420 | .rebuild = ipv4_rebuild_header, |
| 421 | .cache = ipv4_header_cache, |
| 422 | .cache_update = ipv4_header_cache_update, |
| 423 | .parse = ipv4_header_parse, |
| 424 | }; |
| 425 | |
| 426 | /* ------------------------------------------------------------------ */ |
| 427 | |
| 428 | /* FIXME: is this correct for all cases? */ |
| 429 | static bool ipv4_frag_overlap(struct ipv4_partial_datagram *pd, unsigned offset, unsigned len) |
| 430 | { |
| 431 | struct ipv4_fragment_info *fi; |
| 432 | unsigned end = offset + len; |
| 433 | |
| 434 | list_for_each_entry(fi, &pd->fragment_info, fragment_info) { |
| 435 | if (offset < fi->offset + fi->len && end > fi->offset) { |
| 436 | fw_debug ( "frag_overlap pd %p fi %p (%x@%x) with %x@%x\n", pd, fi, fi->len, fi->offset, len, offset ); |
| 437 | return true; |
| 438 | } |
| 439 | } |
| 440 | fw_debug ( "frag_overlap %p does not overlap with %x@%x\n", pd, len, offset ); |
| 441 | return false; |
| 442 | } |
| 443 | |
| 444 | /* Assumes that new fragment does not overlap any existing fragments */ |
| 445 | static struct ipv4_fragment_info *ipv4_frag_new ( struct ipv4_partial_datagram *pd, unsigned offset, unsigned len ) { |
| 446 | struct ipv4_fragment_info *fi, *fi2, *new; |
| 447 | struct list_head *list; |
| 448 | |
| 449 | fw_debug ( "frag_new pd %p %x@%x\n", pd, len, offset ); |
| 450 | list = &pd->fragment_info; |
| 451 | list_for_each_entry(fi, &pd->fragment_info, fragment_info) { |
| 452 | if (fi->offset + fi->len == offset) { |
| 453 | /* The new fragment can be tacked on to the end */ |
| 454 | /* Did the new fragment plug a hole? */ |
| 455 | fi2 = list_entry(fi->fragment_info.next, struct ipv4_fragment_info, fragment_info); |
| 456 | if (fi->offset + fi->len == fi2->offset) { |
| 457 | fw_debug ( "pd %p: hole filling %p (%x@%x) and %p(%x@%x): now %x@%x\n", pd, fi, fi->len, fi->offset, |
| 458 | fi2, fi2->len, fi2->offset, fi->len + len + fi2->len, fi->offset ); |
| 459 | /* glue fragments together */ |
| 460 | fi->len += len + fi2->len; |
| 461 | list_del(&fi2->fragment_info); |
| 462 | kfree(fi2); |
| 463 | } else { |
| 464 | fw_debug ( "pd %p: extending %p from %x@%x to %x@%x\n", pd, fi, fi->len, fi->offset, fi->len+len, fi->offset ); |
| 465 | fi->len += len; |
| 466 | } |
| 467 | return fi; |
| 468 | } |
| 469 | if (offset + len == fi->offset) { |
| 470 | /* The new fragment can be tacked on to the beginning */ |
| 471 | /* Did the new fragment plug a hole? */ |
| 472 | fi2 = list_entry(fi->fragment_info.prev, struct ipv4_fragment_info, fragment_info); |
| 473 | if (fi2->offset + fi2->len == fi->offset) { |
| 474 | /* glue fragments together */ |
| 475 | fw_debug ( "pd %p: extending %p and merging with %p from %x@%x to %x@%x\n", |
| 476 | pd, fi2, fi, fi2->len, fi2->offset, fi2->len + fi->len + len, fi2->offset ); |
| 477 | fi2->len += fi->len + len; |
| 478 | list_del(&fi->fragment_info); |
| 479 | kfree(fi); |
| 480 | return fi2; |
| 481 | } |
| 482 | fw_debug ( "pd %p: extending %p from %x@%x to %x@%x\n", pd, fi, fi->len, fi->offset, offset, fi->len + len ); |
| 483 | fi->offset = offset; |
| 484 | fi->len += len; |
| 485 | return fi; |
| 486 | } |
| 487 | if (offset > fi->offset + fi->len) { |
| 488 | list = &fi->fragment_info; |
| 489 | break; |
| 490 | } |
| 491 | if (offset + len < fi->offset) { |
| 492 | list = fi->fragment_info.prev; |
| 493 | break; |
| 494 | } |
| 495 | } |
| 496 | |
| 497 | new = kmalloc(sizeof(*new), GFP_ATOMIC); |
| 498 | if (!new) { |
| 499 | fw_error ( "out of memory in fragment handling!\n" ); |
| 500 | return NULL; |
| 501 | } |
| 502 | |
| 503 | new->offset = offset; |
| 504 | new->len = len; |
| 505 | list_add(&new->fragment_info, list); |
| 506 | fw_debug ( "pd %p: new frag %p %x@%x\n", pd, new, new->len, new->offset ); |
| 507 | list_for_each_entry( fi, &pd->fragment_info, fragment_info ) |
| 508 | fw_debug ( "fi %p %x@%x\n", fi, fi->len, fi->offset ); |
| 509 | return new; |
| 510 | } |
| 511 | |
| 512 | /* ------------------------------------------------------------------ */ |
| 513 | |
| 514 | static struct ipv4_partial_datagram *ipv4_pd_new(struct net_device *netdev, |
| 515 | struct ipv4_node *node, u16 datagram_label, unsigned dg_size, u32 *frag_buf, |
| 516 | unsigned frag_off, unsigned frag_len) { |
| 517 | struct ipv4_partial_datagram *new; |
| 518 | struct ipv4_fragment_info *fi; |
| 519 | |
| 520 | new = kmalloc(sizeof(*new), GFP_ATOMIC); |
| 521 | if (!new) |
| 522 | goto fail; |
| 523 | INIT_LIST_HEAD(&new->fragment_info); |
| 524 | fi = ipv4_frag_new ( new, frag_off, frag_len); |
| 525 | if ( fi == NULL ) |
| 526 | goto fail_w_new; |
| 527 | new->datagram_label = datagram_label; |
| 528 | new->datagram_size = dg_size; |
| 529 | new->skb = dev_alloc_skb(dg_size + netdev->hard_header_len + 15); |
| 530 | if ( new->skb == NULL ) |
| 531 | goto fail_w_fi; |
| 532 | skb_reserve(new->skb, (netdev->hard_header_len + 15) & ~15); |
| 533 | new->pbuf = skb_put(new->skb, dg_size); |
| 534 | memcpy(new->pbuf + frag_off, frag_buf, frag_len); |
| 535 | list_add_tail(&new->pdg_list, &node->pdg_list); |
| 536 | fw_debug ( "pd_new: new pd %p { dgl %u, dg_size %u, skb %p, pbuf %p } on node %p\n", |
| 537 | new, new->datagram_label, new->datagram_size, new->skb, new->pbuf, node ); |
| 538 | return new; |
| 539 | |
| 540 | fail_w_fi: |
| 541 | kfree(fi); |
| 542 | fail_w_new: |
| 543 | kfree(new); |
| 544 | fail: |
| 545 | fw_error("ipv4_pd_new: no memory\n"); |
| 546 | return NULL; |
| 547 | } |
| 548 | |
| 549 | static struct ipv4_partial_datagram *ipv4_pd_find(struct ipv4_node *node, u16 datagram_label) { |
| 550 | struct ipv4_partial_datagram *pd; |
| 551 | |
| 552 | list_for_each_entry(pd, &node->pdg_list, pdg_list) { |
| 553 | if ( pd->datagram_label == datagram_label ) { |
| 554 | fw_debug ( "pd_find(node %p, label %u): pd %p\n", node, datagram_label, pd ); |
| 555 | return pd; |
| 556 | } |
| 557 | } |
| 558 | fw_debug ( "pd_find(node %p, label %u) no entry\n", node, datagram_label ); |
| 559 | return NULL; |
| 560 | } |
| 561 | |
| 562 | |
| 563 | static void ipv4_pd_delete ( struct ipv4_partial_datagram *old ) { |
| 564 | struct ipv4_fragment_info *fi, *n; |
| 565 | |
| 566 | fw_debug ( "pd_delete %p\n", old ); |
| 567 | list_for_each_entry_safe(fi, n, &old->fragment_info, fragment_info) { |
| 568 | fw_debug ( "Freeing fi %p\n", fi ); |
| 569 | kfree(fi); |
| 570 | } |
| 571 | list_del(&old->pdg_list); |
| 572 | dev_kfree_skb_any(old->skb); |
| 573 | kfree(old); |
| 574 | } |
| 575 | |
| 576 | static bool ipv4_pd_update ( struct ipv4_node *node, struct ipv4_partial_datagram *pd, |
| 577 | u32 *frag_buf, unsigned frag_off, unsigned frag_len) { |
| 578 | fw_debug ( "pd_update node %p, pd %p, frag_buf %p, %x@%x\n", node, pd, frag_buf, frag_len, frag_off ); |
| 579 | if ( ipv4_frag_new ( pd, frag_off, frag_len ) == NULL) |
| 580 | return false; |
| 581 | memcpy(pd->pbuf + frag_off, frag_buf, frag_len); |
| 582 | |
| 583 | /* |
| 584 | * Move list entry to beginnig of list so that oldest partial |
| 585 | * datagrams percolate to the end of the list |
| 586 | */ |
| 587 | list_move_tail(&pd->pdg_list, &node->pdg_list); |
| 588 | fw_debug ( "New pd list:\n" ); |
| 589 | list_for_each_entry ( pd, &node->pdg_list, pdg_list ) { |
| 590 | fw_debug ( "pd %p\n", pd ); |
| 591 | } |
| 592 | return true; |
| 593 | } |
| 594 | |
| 595 | static bool ipv4_pd_is_complete ( struct ipv4_partial_datagram *pd ) { |
| 596 | struct ipv4_fragment_info *fi; |
| 597 | bool ret; |
| 598 | |
| 599 | fi = list_entry(pd->fragment_info.next, struct ipv4_fragment_info, fragment_info); |
| 600 | |
| 601 | ret = (fi->len == pd->datagram_size); |
| 602 | fw_debug ( "pd_is_complete (pd %p, dgs %x): fi %p (%x@%x) %s\n", pd, pd->datagram_size, fi, fi->len, fi->offset, ret ? "yes" : "no" ); |
| 603 | return ret; |
| 604 | } |
| 605 | |
| 606 | /* ------------------------------------------------------------------ */ |
| 607 | |
| 608 | static int ipv4_node_new ( struct fw_card *card, struct fw_device *device ) { |
| 609 | struct ipv4_node *node; |
| 610 | |
| 611 | node = kmalloc ( sizeof(*node), GFP_KERNEL ); |
| 612 | if ( ! node ) { |
| 613 | fw_error ( "allocate new node failed\n" ); |
| 614 | return -ENOMEM; |
| 615 | } |
| 616 | node->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4]; |
| 617 | node->fifo = INVALID_FIFO_ADDR; |
| 618 | INIT_LIST_HEAD(&node->pdg_list); |
| 619 | spin_lock_init(&node->pdg_lock); |
| 620 | node->pdg_size = 0; |
| 621 | node->generation = device->generation; |
| 622 | rmb(); |
| 623 | node->nodeid = device->node_id; |
| 624 | /* FIXME what should it really be? */ |
| 625 | node->max_payload = S100_BUFFER_SIZE - IPV4_UNFRAG_HDR_SIZE; |
| 626 | node->datagram_label = 0U; |
| 627 | node->xmt_speed = device->max_speed; |
| 628 | list_add_tail ( &node->ipv4_nodes, &card->ipv4_nodes ); |
| 629 | fw_debug ( "node_new: %p { guid %016llx, generation %u, nodeid %x, max_payload %x, xmt_speed %x } added\n", |
| 630 | node, (unsigned long long)node->guid, node->generation, node->nodeid, node->max_payload, node->xmt_speed ); |
| 631 | return 0; |
| 632 | } |
| 633 | |
| 634 | static struct ipv4_node *ipv4_node_find_by_guid(struct ipv4_priv *priv, u64 guid) { |
| 635 | struct ipv4_node *node; |
| 636 | unsigned long flags; |
| 637 | |
| 638 | spin_lock_irqsave(&priv->lock, flags); |
| 639 | list_for_each_entry(node, &priv->card->ipv4_nodes, ipv4_nodes) |
| 640 | if (node->guid == guid) { |
| 641 | /* FIXME: lock the node first? */ |
| 642 | spin_unlock_irqrestore ( &priv->lock, flags ); |
| 643 | fw_debug ( "node_find_by_guid (%016llx) found %p\n", (unsigned long long)guid, node ); |
| 644 | return node; |
| 645 | } |
| 646 | |
| 647 | spin_unlock_irqrestore ( &priv->lock, flags ); |
| 648 | fw_debug ( "node_find_by_guid (%016llx) not found\n", (unsigned long long)guid ); |
| 649 | return NULL; |
| 650 | } |
| 651 | |
| 652 | static struct ipv4_node *ipv4_node_find_by_nodeid(struct ipv4_priv *priv, u16 nodeid) { |
| 653 | struct ipv4_node *node; |
| 654 | unsigned long flags; |
| 655 | |
| 656 | spin_lock_irqsave(&priv->lock, flags); |
| 657 | list_for_each_entry(node, &priv->card->ipv4_nodes, ipv4_nodes) |
| 658 | if (node->nodeid == nodeid) { |
| 659 | /* FIXME: lock the node first? */ |
| 660 | spin_unlock_irqrestore ( &priv->lock, flags ); |
| 661 | fw_debug ( "node_find_by_nodeid (%x) found %p\n", nodeid, node ); |
| 662 | return node; |
| 663 | } |
| 664 | fw_debug ( "node_find_by_nodeid (%x) not found\n", nodeid ); |
| 665 | spin_unlock_irqrestore ( &priv->lock, flags ); |
| 666 | return NULL; |
| 667 | } |
| 668 | |
| 669 | /* This is only complicated because we can't assume priv exists */ |
| 670 | static void ipv4_node_delete ( struct fw_card *card, struct fw_device *device ) { |
| 671 | struct net_device *netdev; |
| 672 | struct ipv4_priv *priv; |
| 673 | struct ipv4_node *node; |
| 674 | u64 guid; |
| 675 | unsigned long flags; |
| 676 | struct ipv4_partial_datagram *pd, *pd_next; |
| 677 | |
| 678 | guid = (u64)device->config_rom[3] << 32 | device->config_rom[4]; |
| 679 | netdev = card->netdev; |
| 680 | if ( netdev ) |
| 681 | priv = netdev_priv ( netdev ); |
| 682 | else |
| 683 | priv = NULL; |
| 684 | if ( priv ) |
| 685 | spin_lock_irqsave ( &priv->lock, flags ); |
| 686 | list_for_each_entry( node, &card->ipv4_nodes, ipv4_nodes ) { |
| 687 | if ( node->guid == guid ) { |
| 688 | list_del ( &node->ipv4_nodes ); |
| 689 | list_for_each_entry_safe( pd, pd_next, &node->pdg_list, pdg_list ) |
| 690 | ipv4_pd_delete ( pd ); |
| 691 | break; |
| 692 | } |
| 693 | } |
| 694 | if ( priv ) |
| 695 | spin_unlock_irqrestore ( &priv->lock, flags ); |
| 696 | } |
| 697 | |
| 698 | /* ------------------------------------------------------------------ */ |
| 699 | |
| 700 | |
| 701 | static int ipv4_finish_incoming_packet ( struct net_device *netdev, |
| 702 | struct sk_buff *skb, u16 source_node_id, bool is_broadcast, u16 ether_type ) { |
| 703 | struct ipv4_priv *priv; |
| 704 | static u64 broadcast_hw = ~0ULL; |
| 705 | int status; |
| 706 | u64 guid; |
| 707 | |
| 708 | fw_debug ( "ipv4_finish_incoming_packet(%p, %p, %x, %s, %x\n", |
| 709 | netdev, skb, source_node_id, is_broadcast ? "true" : "false", ether_type ); |
| 710 | priv = netdev_priv(netdev); |
| 711 | /* Write metadata, and then pass to the receive level */ |
| 712 | skb->dev = netdev; |
| 713 | skb->ip_summed = CHECKSUM_UNNECESSARY; /* don't check it */ |
| 714 | |
| 715 | /* |
| 716 | * Parse the encapsulation header. This actually does the job of |
| 717 | * converting to an ethernet frame header, as well as arp |
| 718 | * conversion if needed. ARP conversion is easier in this |
| 719 | * direction, since we are using ethernet as our backend. |
| 720 | */ |
| 721 | /* |
| 722 | * If this is an ARP packet, convert it. First, we want to make |
| 723 | * use of some of the fields, since they tell us a little bit |
| 724 | * about the sending machine. |
| 725 | */ |
| 726 | if (ether_type == ETH_P_ARP) { |
| 727 | struct ipv4_arp *arp1394; |
| 728 | struct arphdr *arp; |
| 729 | unsigned char *arp_ptr; |
| 730 | u64 fifo_addr; |
| 731 | u8 max_rec; |
| 732 | u8 sspd; |
| 733 | u16 max_payload; |
| 734 | struct ipv4_node *node; |
| 735 | static const u16 ipv4_speed_to_max_payload[] = { |
| 736 | /* S100, S200, S400, S800, S1600, S3200 */ |
| 737 | 512, 1024, 2048, 4096, 4096, 4096 |
| 738 | }; |
| 739 | |
| 740 | /* fw_debug ( "ARP packet\n" ); */ |
| 741 | arp1394 = (struct ipv4_arp *)skb->data; |
| 742 | arp = (struct arphdr *)skb->data; |
| 743 | arp_ptr = (unsigned char *)(arp + 1); |
| 744 | fifo_addr = (u64)ntohs(arp1394->fifo_hi) << 32 | |
| 745 | ntohl(arp1394->fifo_lo); |
| 746 | max_rec = priv->card->max_receive; |
| 747 | if ( arp1394->max_rec < max_rec ) |
| 748 | max_rec = arp1394->max_rec; |
| 749 | sspd = arp1394->sspd; |
| 750 | /* |
| 751 | * Sanity check. MacOSX seems to be sending us 131 in this |
| 752 | * field (atleast on my Panther G5). Not sure why. |
| 753 | */ |
| 754 | if (sspd > 5 ) { |
| 755 | fw_notify ( "sspd %x out of range\n", sspd ); |
| 756 | sspd = 0; |
| 757 | } |
| 758 | |
| 759 | max_payload = min(ipv4_speed_to_max_payload[sspd], |
| 760 | (u16)(1 << (max_rec + 1))) - IPV4_UNFRAG_HDR_SIZE; |
| 761 | |
| 762 | guid = be64_to_cpu(get_unaligned(&arp1394->s_uniq_id)); |
| 763 | node = ipv4_node_find_by_guid(priv, guid); |
| 764 | if (!node) { |
| 765 | fw_notify ( "No node for ARP packet from %llx\n", guid ); |
| 766 | goto failed_proto; |
| 767 | } |
| 768 | if ( node->nodeid != source_node_id || node->generation != priv->card->generation ) { |
| 769 | fw_notify ( "Internal error: node->nodeid (%x) != soucre_node_id (%x) or node->generation (%x) != priv->card->generation(%x)\n", |
| 770 | node->nodeid, source_node_id, node->generation, priv->card->generation ); |
| 771 | node->nodeid = source_node_id; |
| 772 | node->generation = priv->card->generation; |
| 773 | } |
| 774 | |
| 775 | /* FIXME: for debugging */ |
| 776 | if ( sspd > SCODE_400 ) |
| 777 | sspd = SCODE_400; |
| 778 | /* Update our speed/payload/fifo_offset table */ |
| 779 | /* |
| 780 | * FIXME: this does not handle cases where two high-speed endpoints must use a slower speed because of |
| 781 | * a lower speed hub between them. We need to look at the actual topology map here. |
| 782 | */ |
| 783 | fw_debug ( "Setting node %p fifo %llx (was %llx), max_payload %x (was %x), speed %x (was %x)\n", |
| 784 | node, fifo_addr, node->fifo, max_payload, node->max_payload, sspd, node->xmt_speed ); |
| 785 | node->fifo = fifo_addr; |
| 786 | node->max_payload = max_payload; |
| 787 | /* |
| 788 | * Only allow speeds to go down from their initial value. |
| 789 | * Otherwise a local node that can only do S400 or slower may |
| 790 | * be told to transmit at S800 to a faster remote node. |
| 791 | */ |
| 792 | if ( node->xmt_speed > sspd ) |
| 793 | node->xmt_speed = sspd; |
| 794 | |
| 795 | /* |
| 796 | * Now that we're done with the 1394 specific stuff, we'll |
| 797 | * need to alter some of the data. Believe it or not, all |
| 798 | * that needs to be done is sender_IP_address needs to be |
| 799 | * moved, the destination hardware address get stuffed |
| 800 | * in and the hardware address length set to 8. |
| 801 | * |
| 802 | * IMPORTANT: The code below overwrites 1394 specific data |
| 803 | * needed above so keep the munging of the data for the |
| 804 | * higher level IP stack last. |
| 805 | */ |
| 806 | |
| 807 | arp->ar_hln = 8; |
| 808 | arp_ptr += arp->ar_hln; /* skip over sender unique id */ |
| 809 | *(u32 *)arp_ptr = arp1394->sip; /* move sender IP addr */ |
| 810 | arp_ptr += arp->ar_pln; /* skip over sender IP addr */ |
| 811 | |
| 812 | if (arp->ar_op == htons(ARPOP_REQUEST)) |
| 813 | memset(arp_ptr, 0, sizeof(u64)); |
| 814 | else |
| 815 | memcpy(arp_ptr, netdev->dev_addr, sizeof(u64)); |
| 816 | } |
| 817 | |
| 818 | /* Now add the ethernet header. */ |
| 819 | guid = cpu_to_be64(priv->card->guid); |
| 820 | if (dev_hard_header(skb, netdev, ether_type, is_broadcast ? &broadcast_hw : &guid, NULL, |
| 821 | skb->len) >= 0) { |
| 822 | struct ipv4_ether_hdr *eth; |
| 823 | u16 *rawp; |
| 824 | __be16 protocol; |
| 825 | |
| 826 | skb_reset_mac_header(skb); |
| 827 | skb_pull(skb, sizeof(*eth)); |
| 828 | eth = ipv4_ether_hdr(skb); |
| 829 | if (*eth->h_dest & 1) { |
| 830 | if (memcmp(eth->h_dest, netdev->broadcast, netdev->addr_len) == 0) { |
| 831 | fw_debug ( "Broadcast\n" ); |
| 832 | skb->pkt_type = PACKET_BROADCAST; |
| 833 | } |
| 834 | #if 0 |
| 835 | else |
| 836 | skb->pkt_type = PACKET_MULTICAST; |
| 837 | #endif |
| 838 | } else { |
| 839 | if (memcmp(eth->h_dest, netdev->dev_addr, netdev->addr_len)) { |
| 840 | u64 a1, a2; |
| 841 | |
| 842 | memcpy ( &a1, eth->h_dest, sizeof(u64)); |
| 843 | memcpy ( &a2, netdev->dev_addr, sizeof(u64)); |
| 844 | fw_debug ( "Otherhost %llx %llx %x\n", a1, a2, netdev->addr_len ); |
| 845 | skb->pkt_type = PACKET_OTHERHOST; |
| 846 | } |
| 847 | } |
| 848 | if (ntohs(eth->h_proto) >= 1536) { |
| 849 | fw_debug ( " proto %x %x\n", eth->h_proto, ntohs(eth->h_proto) ); |
| 850 | protocol = eth->h_proto; |
| 851 | } else { |
| 852 | rawp = (u16 *)skb->data; |
| 853 | if (*rawp == 0xFFFF) { |
| 854 | fw_debug ( "proto 802_3\n" ); |
| 855 | protocol = htons(ETH_P_802_3); |
| 856 | } else { |
| 857 | fw_debug ( "proto 802_2\n" ); |
| 858 | protocol = htons(ETH_P_802_2); |
| 859 | } |
| 860 | } |
| 861 | skb->protocol = protocol; |
| 862 | } |
| 863 | status = netif_rx(skb); |
| 864 | if ( status == NET_RX_DROP) { |
| 865 | netdev->stats.rx_errors++; |
| 866 | netdev->stats.rx_dropped++; |
| 867 | } else { |
| 868 | netdev->stats.rx_packets++; |
| 869 | netdev->stats.rx_bytes += skb->len; |
| 870 | } |
| 871 | if (netif_queue_stopped(netdev)) |
| 872 | netif_wake_queue(netdev); |
| 873 | return 0; |
| 874 | |
| 875 | failed_proto: |
| 876 | netdev->stats.rx_errors++; |
| 877 | netdev->stats.rx_dropped++; |
| 878 | dev_kfree_skb_any(skb); |
| 879 | if (netif_queue_stopped(netdev)) |
| 880 | netif_wake_queue(netdev); |
| 881 | netdev->last_rx = jiffies; |
| 882 | return 0; |
| 883 | } |
| 884 | |
| 885 | /* ------------------------------------------------------------------ */ |
| 886 | |
| 887 | static int ipv4_incoming_packet ( struct ipv4_priv *priv, u32 *buf, int len, u16 source_node_id, bool is_broadcast ) { |
| 888 | struct sk_buff *skb; |
| 889 | struct net_device *netdev; |
| 890 | struct ipv4_hdr hdr; |
| 891 | unsigned lf; |
| 892 | unsigned long flags; |
| 893 | struct ipv4_node *node; |
| 894 | struct ipv4_partial_datagram *pd; |
| 895 | int fg_off; |
| 896 | int dg_size; |
| 897 | u16 datagram_label; |
| 898 | int retval; |
| 899 | u16 ether_type; |
| 900 | |
| 901 | fw_debug ( "ipv4_incoming_packet(%p, %p, %d, %x, %s)\n", priv, buf, len, source_node_id, is_broadcast ? "true" : "false" ); |
| 902 | netdev = priv->card->netdev; |
| 903 | |
| 904 | hdr.w0 = ntohl(buf[0]); |
| 905 | lf = ipv4_get_hdr_lf(&hdr); |
| 906 | if ( lf == IPV4_HDR_UNFRAG ) { |
| 907 | /* |
| 908 | * An unfragmented datagram has been received by the ieee1394 |
| 909 | * bus. Build an skbuff around it so we can pass it to the |
| 910 | * high level network layer. |
| 911 | */ |
| 912 | ether_type = ipv4_get_hdr_ether_type(&hdr); |
| 913 | fw_debug ( "header w0 = %x, lf = %x, ether_type = %x\n", hdr.w0, lf, ether_type ); |
| 914 | buf++; |
| 915 | len -= IPV4_UNFRAG_HDR_SIZE; |
| 916 | |
| 917 | skb = dev_alloc_skb(len + netdev->hard_header_len + 15); |
| 918 | if (unlikely(!skb)) { |
| 919 | fw_error ( "Out of memory for incoming packet\n"); |
| 920 | netdev->stats.rx_dropped++; |
| 921 | return -1; |
| 922 | } |
| 923 | skb_reserve(skb, (netdev->hard_header_len + 15) & ~15); |
| 924 | memcpy(skb_put(skb, len), buf, len ); |
| 925 | return ipv4_finish_incoming_packet(netdev, skb, source_node_id, is_broadcast, ether_type ); |
| 926 | } |
| 927 | /* A datagram fragment has been received, now the fun begins. */ |
| 928 | hdr.w1 = ntohl(buf[1]); |
| 929 | buf +=2; |
| 930 | len -= IPV4_FRAG_HDR_SIZE; |
| 931 | if ( lf ==IPV4_HDR_FIRSTFRAG ) { |
| 932 | ether_type = ipv4_get_hdr_ether_type(&hdr); |
| 933 | fg_off = 0; |
| 934 | } else { |
| 935 | fg_off = ipv4_get_hdr_fg_off(&hdr); |
| 936 | ether_type = 0; /* Shut up compiler! */ |
| 937 | } |
| 938 | datagram_label = ipv4_get_hdr_dgl(&hdr); |
| 939 | dg_size = ipv4_get_hdr_dg_size(&hdr); /* ??? + 1 */ |
| 940 | fw_debug ( "fragmented: %x.%x = lf %x, ether_type %x, fg_off %x, dgl %x, dg_size %x\n", hdr.w0, hdr.w1, lf, ether_type, fg_off, datagram_label, dg_size ); |
| 941 | node = ipv4_node_find_by_nodeid ( priv, source_node_id); |
| 942 | spin_lock_irqsave(&node->pdg_lock, flags); |
| 943 | pd = ipv4_pd_find( node, datagram_label ); |
| 944 | if (pd == NULL) { |
| 945 | while ( node->pdg_size >= ipv4_mpd ) { |
| 946 | /* remove the oldest */ |
| 947 | ipv4_pd_delete ( list_first_entry(&node->pdg_list, struct ipv4_partial_datagram, pdg_list) ); |
| 948 | node->pdg_size--; |
| 949 | } |
| 950 | pd = ipv4_pd_new ( netdev, node, datagram_label, dg_size, |
| 951 | buf, fg_off, len); |
| 952 | if ( pd == NULL) { |
| 953 | retval = -ENOMEM; |
| 954 | goto bad_proto; |
| 955 | } |
| 956 | node->pdg_size++; |
| 957 | } else { |
| 958 | if (ipv4_frag_overlap(pd, fg_off, len) || pd->datagram_size != dg_size) { |
| 959 | /* |
| 960 | * Differing datagram sizes or overlapping fragments, |
| 961 | * Either way the remote machine is playing silly buggers |
| 962 | * with us: obliterate the old datagram and start a new one. |
| 963 | */ |
| 964 | ipv4_pd_delete ( pd ); |
| 965 | pd = ipv4_pd_new ( netdev, node, datagram_label, |
| 966 | dg_size, buf, fg_off, len); |
| 967 | if ( pd == NULL ) { |
| 968 | retval = -ENOMEM; |
| 969 | node->pdg_size--; |
| 970 | goto bad_proto; |
| 971 | } |
| 972 | } else { |
| 973 | bool worked; |
| 974 | |
| 975 | worked = ipv4_pd_update ( node, pd, |
| 976 | buf, fg_off, len ); |
| 977 | if ( ! worked ) { |
| 978 | /* |
| 979 | * Couldn't save off fragment anyway |
| 980 | * so might as well obliterate the |
| 981 | * datagram now. |
| 982 | */ |
| 983 | ipv4_pd_delete ( pd ); |
| 984 | node->pdg_size--; |
| 985 | goto bad_proto; |
| 986 | } |
| 987 | } |
| 988 | } /* new datagram or add to existing one */ |
| 989 | |
| 990 | if ( lf == IPV4_HDR_FIRSTFRAG ) |
| 991 | pd->ether_type = ether_type; |
| 992 | if ( ipv4_pd_is_complete ( pd ) ) { |
| 993 | ether_type = pd->ether_type; |
| 994 | node->pdg_size--; |
| 995 | skb = skb_get(pd->skb); |
| 996 | ipv4_pd_delete ( pd ); |
| 997 | spin_unlock_irqrestore(&node->pdg_lock, flags); |
| 998 | return ipv4_finish_incoming_packet ( netdev, skb, source_node_id, false, ether_type ); |
| 999 | } |
| 1000 | /* |
| 1001 | * Datagram is not complete, we're done for the |
| 1002 | * moment. |
| 1003 | */ |
| 1004 | spin_unlock_irqrestore(&node->pdg_lock, flags); |
| 1005 | return 0; |
| 1006 | |
| 1007 | bad_proto: |
| 1008 | spin_unlock_irqrestore(&node->pdg_lock, flags); |
| 1009 | if (netif_queue_stopped(netdev)) |
| 1010 | netif_wake_queue(netdev); |
| 1011 | return 0; |
| 1012 | } |
| 1013 | |
| 1014 | static void ipv4_receive_packet ( struct fw_card *card, struct fw_request *r, |
| 1015 | int tcode, int destination, int source, int generation, int speed, |
| 1016 | unsigned long long offset, void *payload, size_t length, void *callback_data ) { |
| 1017 | struct ipv4_priv *priv; |
| 1018 | int status; |
| 1019 | |
| 1020 | fw_debug ( "ipv4_receive_packet(%p,%p,%x,%x,%x,%x,%x,%llx,%p,%lx,%p)\n", |
| 1021 | card, r, tcode, destination, source, generation, speed, offset, payload, |
| 1022 | (unsigned long)length, callback_data); |
| 1023 | print_hex_dump ( KERN_DEBUG, "header: ", DUMP_PREFIX_OFFSET, 32, 1, payload, length, false ); |
| 1024 | priv = callback_data; |
| 1025 | if ( tcode != TCODE_WRITE_BLOCK_REQUEST |
| 1026 | || destination != card->node_id |
| 1027 | || generation != card->generation |
| 1028 | || offset != priv->handler.offset ) { |
| 1029 | fw_send_response(card, r, RCODE_CONFLICT_ERROR); |
| 1030 | fw_debug("Conflict error card node_id=%x, card generation=%x, local offset %llx\n", |
| 1031 | card->node_id, card->generation, (unsigned long long)priv->handler.offset ); |
| 1032 | return; |
| 1033 | } |
| 1034 | status = ipv4_incoming_packet ( priv, payload, length, source, false ); |
| 1035 | if ( status != 0 ) { |
| 1036 | fw_error ( "Incoming packet failure\n" ); |
| 1037 | fw_send_response ( card, r, RCODE_CONFLICT_ERROR ); |
| 1038 | return; |
| 1039 | } |
| 1040 | fw_send_response ( card, r, RCODE_COMPLETE ); |
| 1041 | } |
| 1042 | |
| 1043 | static void ipv4_receive_broadcast(struct fw_iso_context *context, u32 cycle, |
| 1044 | size_t header_length, void *header, void *data) { |
| 1045 | struct ipv4_priv *priv; |
| 1046 | struct fw_iso_packet packet; |
| 1047 | struct fw_card *card; |
| 1048 | u16 *hdr_ptr; |
| 1049 | u32 *buf_ptr; |
| 1050 | int retval; |
| 1051 | u32 length; |
| 1052 | u16 source_node_id; |
| 1053 | u32 specifier_id; |
| 1054 | u32 ver; |
| 1055 | unsigned long offset; |
| 1056 | unsigned long flags; |
| 1057 | |
| 1058 | fw_debug ( "ipv4_receive_broadcast ( context=%p, cycle=%x, header_length=%lx, header=%p, data=%p )\n", context, cycle, (unsigned long)header_length, header, data ); |
| 1059 | print_hex_dump ( KERN_DEBUG, "header: ", DUMP_PREFIX_OFFSET, 32, 1, header, header_length, false ); |
| 1060 | priv = data; |
| 1061 | card = priv->card; |
| 1062 | hdr_ptr = header; |
| 1063 | length = ntohs(hdr_ptr[0]); |
| 1064 | spin_lock_irqsave(&priv->lock,flags); |
| 1065 | offset = priv->rcv_buffer_size * priv->broadcast_rcv_next_ptr; |
| 1066 | buf_ptr = priv->broadcast_rcv_buffer_ptrs[priv->broadcast_rcv_next_ptr++]; |
| 1067 | if ( priv->broadcast_rcv_next_ptr == priv->num_broadcast_rcv_ptrs ) |
| 1068 | priv->broadcast_rcv_next_ptr = 0; |
| 1069 | spin_unlock_irqrestore(&priv->lock,flags); |
| 1070 | fw_debug ( "length %u at %p\n", length, buf_ptr ); |
| 1071 | print_hex_dump ( KERN_DEBUG, "buffer: ", DUMP_PREFIX_OFFSET, 32, 1, buf_ptr, length, false ); |
| 1072 | |
| 1073 | specifier_id = (be32_to_cpu(buf_ptr[0]) & 0xffff) << 8 |
| 1074 | | (be32_to_cpu(buf_ptr[1]) & 0xff000000) >> 24; |
| 1075 | ver = be32_to_cpu(buf_ptr[1]) & 0xFFFFFF; |
| 1076 | source_node_id = be32_to_cpu(buf_ptr[0]) >> 16; |
| 1077 | /* fw_debug ( "source %x SpecID %x ver %x\n", source_node_id, specifier_id, ver ); */ |
| 1078 | if ( specifier_id == IPV4_GASP_SPECIFIER_ID && ver == IPV4_GASP_VERSION ) { |
| 1079 | buf_ptr += 2; |
| 1080 | length -= IPV4_GASP_OVERHEAD; |
| 1081 | ipv4_incoming_packet(priv, buf_ptr, length, source_node_id, true); |
| 1082 | } else |
| 1083 | fw_debug ( "Ignoring packet: not GASP\n" ); |
| 1084 | packet.payload_length = priv->rcv_buffer_size; |
| 1085 | packet.interrupt = 1; |
| 1086 | packet.skip = 0; |
| 1087 | packet.tag = 3; |
| 1088 | packet.sy = 0; |
| 1089 | packet.header_length = IPV4_GASP_OVERHEAD; |
| 1090 | spin_lock_irqsave(&priv->lock,flags); |
| 1091 | retval = fw_iso_context_queue ( priv->broadcast_rcv_context, &packet, |
| 1092 | &priv->broadcast_rcv_buffer, offset ); |
| 1093 | spin_unlock_irqrestore(&priv->lock,flags); |
| 1094 | if ( retval < 0 ) |
| 1095 | fw_error ( "requeue failed\n" ); |
| 1096 | } |
| 1097 | |
| 1098 | static void debug_ptask ( struct ipv4_packet_task *ptask ) { |
| 1099 | static const char *tx_types[] = { "Unknown", "GASP", "Write" }; |
| 1100 | |
| 1101 | fw_debug ( "packet %p { hdr { w0 %x w1 %x }, skb %p, priv %p," |
| 1102 | " tx_type %s, outstanding_pkts %d, max_payload %x, fifo %llx," |
| 1103 | " speed %x, dest_node %x, generation %x }\n", |
| 1104 | ptask, ptask->hdr.w0, ptask->hdr.w1, ptask->skb, ptask->priv, |
| 1105 | ptask->tx_type > IPV4_WRREQ ? "Invalid" : tx_types[ptask->tx_type], |
| 1106 | ptask->outstanding_pkts, ptask->max_payload, |
| 1107 | ptask->fifo_addr, ptask->speed, ptask->dest_node, ptask->generation ); |
| 1108 | print_hex_dump ( KERN_DEBUG, "packet :", DUMP_PREFIX_OFFSET, 32, 1, |
| 1109 | ptask->skb->data, ptask->skb->len, false ); |
| 1110 | } |
| 1111 | |
| 1112 | static void ipv4_transmit_packet_done ( struct ipv4_packet_task *ptask ) { |
| 1113 | struct ipv4_priv *priv; |
| 1114 | unsigned long flags; |
| 1115 | |
| 1116 | priv = ptask->priv; |
| 1117 | spin_lock_irqsave ( &priv->lock, flags ); |
| 1118 | list_del ( &ptask->packet_list ); |
| 1119 | spin_unlock_irqrestore ( &priv->lock, flags ); |
| 1120 | ptask->outstanding_pkts--; |
| 1121 | if ( ptask->outstanding_pkts > 0 ) { |
| 1122 | u16 dg_size; |
| 1123 | u16 fg_off; |
| 1124 | u16 datagram_label; |
| 1125 | u16 lf; |
| 1126 | struct sk_buff *skb; |
| 1127 | |
| 1128 | /* Update the ptask to point to the next fragment and send it */ |
| 1129 | lf = ipv4_get_hdr_lf(&ptask->hdr); |
| 1130 | switch (lf) { |
| 1131 | case IPV4_HDR_LASTFRAG: |
| 1132 | case IPV4_HDR_UNFRAG: |
| 1133 | default: |
| 1134 | fw_error ( "Outstanding packet %x lf %x, header %x,%x\n", ptask->outstanding_pkts, lf, ptask->hdr.w0, ptask->hdr.w1 ); |
| 1135 | BUG(); |
| 1136 | |
| 1137 | case IPV4_HDR_FIRSTFRAG: |
| 1138 | /* Set frag type here for future interior fragments */ |
| 1139 | dg_size = ipv4_get_hdr_dg_size(&ptask->hdr); |
| 1140 | fg_off = ptask->max_payload - IPV4_FRAG_HDR_SIZE; |
| 1141 | datagram_label = ipv4_get_hdr_dgl(&ptask->hdr); |
| 1142 | break; |
| 1143 | |
| 1144 | case IPV4_HDR_INTFRAG: |
| 1145 | dg_size = ipv4_get_hdr_dg_size(&ptask->hdr); |
| 1146 | fg_off = ipv4_get_hdr_fg_off(&ptask->hdr) + ptask->max_payload - IPV4_FRAG_HDR_SIZE; |
| 1147 | datagram_label = ipv4_get_hdr_dgl(&ptask->hdr); |
| 1148 | break; |
| 1149 | } |
| 1150 | skb = ptask->skb; |
| 1151 | skb_pull ( skb, ptask->max_payload ); |
| 1152 | if ( ptask->outstanding_pkts > 1 ) { |
| 1153 | ipv4_make_sf_hdr ( &ptask->hdr, |
| 1154 | IPV4_HDR_INTFRAG, dg_size, fg_off, datagram_label ); |
| 1155 | } else { |
| 1156 | ipv4_make_sf_hdr ( &ptask->hdr, |
| 1157 | IPV4_HDR_LASTFRAG, dg_size, fg_off, datagram_label ); |
| 1158 | ptask->max_payload = skb->len + IPV4_FRAG_HDR_SIZE; |
| 1159 | |
| 1160 | } |
| 1161 | ipv4_send_packet ( ptask ); |
| 1162 | } else { |
| 1163 | dev_kfree_skb_any ( ptask->skb ); |
| 1164 | kmem_cache_free( ipv4_packet_task_cache, ptask ); |
| 1165 | } |
| 1166 | } |
| 1167 | |
| 1168 | static void ipv4_write_complete ( struct fw_card *card, int rcode, |
| 1169 | void *payload, size_t length, void *data ) { |
| 1170 | struct ipv4_packet_task *ptask; |
| 1171 | |
| 1172 | ptask = data; |
| 1173 | fw_debug ( "ipv4_write_complete ( %p, %x, %p, %lx, %p )\n", |
| 1174 | card, rcode, payload, (unsigned long)length, data ); |
| 1175 | debug_ptask ( ptask ); |
| 1176 | |
| 1177 | if ( rcode == RCODE_COMPLETE ) { |
| 1178 | ipv4_transmit_packet_done ( ptask ); |
| 1179 | } else { |
| 1180 | fw_error ( "ipv4_write_complete: failed: %x\n", rcode ); |
| 1181 | /* ??? error recovery */ |
| 1182 | } |
| 1183 | } |
| 1184 | |
| 1185 | static int ipv4_send_packet ( struct ipv4_packet_task *ptask ) { |
| 1186 | struct ipv4_priv *priv; |
| 1187 | unsigned tx_len; |
| 1188 | struct ipv4_hdr *bufhdr; |
| 1189 | unsigned long flags; |
| 1190 | struct net_device *netdev; |
| 1191 | #if 0 /* stefanr */ |
| 1192 | int retval; |
| 1193 | #endif |
| 1194 | |
| 1195 | fw_debug ( "ipv4_send_packet\n" ); |
| 1196 | debug_ptask ( ptask ); |
| 1197 | priv = ptask->priv; |
| 1198 | tx_len = ptask->max_payload; |
| 1199 | switch (ipv4_get_hdr_lf(&ptask->hdr)) { |
| 1200 | case IPV4_HDR_UNFRAG: |
| 1201 | bufhdr = (struct ipv4_hdr *)skb_push(ptask->skb, IPV4_UNFRAG_HDR_SIZE); |
| 1202 | bufhdr->w0 = htonl(ptask->hdr.w0); |
| 1203 | break; |
| 1204 | |
| 1205 | case IPV4_HDR_FIRSTFRAG: |
| 1206 | case IPV4_HDR_INTFRAG: |
| 1207 | case IPV4_HDR_LASTFRAG: |
| 1208 | bufhdr = (struct ipv4_hdr *)skb_push(ptask->skb, IPV4_FRAG_HDR_SIZE); |
| 1209 | bufhdr->w0 = htonl(ptask->hdr.w0); |
| 1210 | bufhdr->w1 = htonl(ptask->hdr.w1); |
| 1211 | break; |
| 1212 | |
| 1213 | default: |
| 1214 | BUG(); |
| 1215 | } |
| 1216 | if ( ptask->tx_type == IPV4_GASP ) { |
| 1217 | u32 *packets; |
| 1218 | int generation; |
| 1219 | int nodeid; |
| 1220 | |
| 1221 | /* ptask->generation may not have been set yet */ |
| 1222 | generation = priv->card->generation; |
| 1223 | smp_rmb(); |
| 1224 | nodeid = priv->card->node_id; |
| 1225 | packets = (u32 *)skb_push(ptask->skb, sizeof(u32)*2); |
| 1226 | packets[0] = htonl(nodeid << 16 | (IPV4_GASP_SPECIFIER_ID>>8)); |
| 1227 | packets[1] = htonl((IPV4_GASP_SPECIFIER_ID & 0xFF) << 24 | IPV4_GASP_VERSION); |
| 1228 | fw_send_request ( priv->card, &ptask->transaction, TCODE_STREAM_DATA, |
| 1229 | fw_stream_packet_destination_id(3, BROADCAST_CHANNEL, 0), |
| 1230 | generation, SCODE_100, 0ULL, ptask->skb->data, tx_len + 8, ipv4_write_complete, ptask ); |
| 1231 | spin_lock_irqsave(&priv->lock,flags); |
| 1232 | list_add_tail ( &ptask->packet_list, &priv->broadcasted_list ); |
| 1233 | spin_unlock_irqrestore(&priv->lock,flags); |
| 1234 | #if 0 /* stefanr */ |
| 1235 | return retval; |
| 1236 | #else |
| 1237 | return 0; |
| 1238 | #endif |
| 1239 | } |
| 1240 | fw_debug("send_request (%p, %p, WRITE_BLOCK, %x, %x, %x, %llx, %p, %d, %p, %p\n", |
| 1241 | priv->card, &ptask->transaction, ptask->dest_node, ptask->generation, |
| 1242 | ptask->speed, (unsigned long long)ptask->fifo_addr, ptask->skb->data, tx_len, |
| 1243 | ipv4_write_complete, ptask ); |
| 1244 | fw_send_request ( priv->card, &ptask->transaction, |
| 1245 | TCODE_WRITE_BLOCK_REQUEST, ptask->dest_node, ptask->generation, ptask->speed, |
| 1246 | ptask->fifo_addr, ptask->skb->data, tx_len, ipv4_write_complete, ptask ); |
| 1247 | spin_lock_irqsave(&priv->lock,flags); |
| 1248 | list_add_tail ( &ptask->packet_list, &priv->sent_list ); |
| 1249 | spin_unlock_irqrestore(&priv->lock,flags); |
| 1250 | netdev = priv->card->netdev; |
| 1251 | netdev->trans_start = jiffies; |
| 1252 | return 0; |
| 1253 | } |
| 1254 | |
| 1255 | static int ipv4_broadcast_start ( struct ipv4_priv *priv ) { |
| 1256 | struct fw_iso_context *context; |
| 1257 | int retval; |
| 1258 | unsigned num_packets; |
| 1259 | unsigned max_receive; |
| 1260 | struct fw_iso_packet packet; |
| 1261 | unsigned long offset; |
| 1262 | unsigned u; |
| 1263 | /* unsigned transmit_speed; */ |
| 1264 | |
| 1265 | #if 0 /* stefanr */ |
| 1266 | if ( priv->card->broadcast_channel != (BROADCAST_CHANNEL_VALID|BROADCAST_CHANNEL_INITIAL)) { |
| 1267 | fw_notify ( "Invalid broadcast channel %x\n", priv->card->broadcast_channel ); |
| 1268 | /* FIXME: try again later? */ |
| 1269 | /* return -EINVAL; */ |
| 1270 | } |
| 1271 | #endif |
| 1272 | if ( priv->local_fifo == INVALID_FIFO_ADDR ) { |
| 1273 | struct fw_address_region region; |
| 1274 | |
| 1275 | priv->handler.length = FIFO_SIZE; |
| 1276 | priv->handler.address_callback = ipv4_receive_packet; |
| 1277 | priv->handler.callback_data = priv; |
| 1278 | /* FIXME: this is OHCI, but what about others? */ |
| 1279 | region.start = 0xffff00000000ULL; |
| 1280 | region.end = 0xfffffffffffcULL; |
| 1281 | |
| 1282 | retval = fw_core_add_address_handler ( &priv->handler, ®ion ); |
| 1283 | if ( retval < 0 ) |
| 1284 | goto failed_initial; |
| 1285 | priv->local_fifo = priv->handler.offset; |
| 1286 | } |
| 1287 | |
| 1288 | /* |
| 1289 | * FIXME: rawiso limits us to PAGE_SIZE. This only matters if we ever have |
| 1290 | * a machine with PAGE_SIZE < 4096 |
| 1291 | */ |
| 1292 | max_receive = 1U << (priv->card->max_receive + 1); |
| 1293 | num_packets = ( ipv4_iso_page_count * PAGE_SIZE ) / max_receive; |
| 1294 | if ( ! priv->broadcast_rcv_context ) { |
| 1295 | void **ptrptr; |
| 1296 | |
| 1297 | context = fw_iso_context_create ( priv->card, |
| 1298 | FW_ISO_CONTEXT_RECEIVE, BROADCAST_CHANNEL, |
| 1299 | priv->card->link_speed, 8, ipv4_receive_broadcast, priv ); |
| 1300 | if (IS_ERR(context)) { |
| 1301 | retval = PTR_ERR(context); |
| 1302 | goto failed_context_create; |
| 1303 | } |
| 1304 | retval = fw_iso_buffer_init ( &priv->broadcast_rcv_buffer, |
| 1305 | priv->card, ipv4_iso_page_count, DMA_FROM_DEVICE ); |
| 1306 | if ( retval < 0 ) |
| 1307 | goto failed_buffer_init; |
| 1308 | ptrptr = kmalloc ( sizeof(void*)*num_packets, GFP_KERNEL ); |
| 1309 | if ( ! ptrptr ) { |
| 1310 | retval = -ENOMEM; |
| 1311 | goto failed_ptrs_alloc; |
| 1312 | } |
| 1313 | priv->broadcast_rcv_buffer_ptrs = ptrptr; |
| 1314 | for ( u = 0; u < ipv4_iso_page_count; u++ ) { |
| 1315 | void *ptr; |
| 1316 | unsigned v; |
| 1317 | |
| 1318 | ptr = kmap ( priv->broadcast_rcv_buffer.pages[u] ); |
| 1319 | for ( v = 0; v < num_packets / ipv4_iso_page_count; v++ ) |
| 1320 | *ptrptr++ = (void *)((char *)ptr + v * max_receive); |
| 1321 | } |
| 1322 | priv->broadcast_rcv_context = context; |
| 1323 | } else |
| 1324 | context = priv->broadcast_rcv_context; |
| 1325 | |
| 1326 | packet.payload_length = max_receive; |
| 1327 | packet.interrupt = 1; |
| 1328 | packet.skip = 0; |
| 1329 | packet.tag = 3; |
| 1330 | packet.sy = 0; |
| 1331 | packet.header_length = IPV4_GASP_OVERHEAD; |
| 1332 | offset = 0; |
| 1333 | for ( u = 0; u < num_packets; u++ ) { |
| 1334 | retval = fw_iso_context_queue ( context, &packet, |
| 1335 | &priv->broadcast_rcv_buffer, offset ); |
| 1336 | if ( retval < 0 ) |
| 1337 | goto failed_rcv_queue; |
| 1338 | offset += max_receive; |
| 1339 | } |
| 1340 | priv->num_broadcast_rcv_ptrs = num_packets; |
| 1341 | priv->rcv_buffer_size = max_receive; |
| 1342 | priv->broadcast_rcv_next_ptr = 0U; |
| 1343 | retval = fw_iso_context_start ( context, -1, 0, FW_ISO_CONTEXT_MATCH_ALL_TAGS ); /* ??? sync */ |
| 1344 | if ( retval < 0 ) |
| 1345 | goto failed_rcv_queue; |
| 1346 | /* FIXME: adjust this when we know the max receive speeds of all other IP nodes on the bus. */ |
| 1347 | /* since we only xmt at S100 ??? */ |
| 1348 | priv->broadcast_xmt_max_payload = S100_BUFFER_SIZE - IPV4_GASP_OVERHEAD - IPV4_UNFRAG_HDR_SIZE; |
| 1349 | priv->broadcast_state = IPV4_BROADCAST_RUNNING; |
| 1350 | return 0; |
| 1351 | |
| 1352 | failed_rcv_queue: |
| 1353 | kfree ( priv->broadcast_rcv_buffer_ptrs ); |
| 1354 | priv->broadcast_rcv_buffer_ptrs = NULL; |
| 1355 | failed_ptrs_alloc: |
| 1356 | fw_iso_buffer_destroy ( &priv->broadcast_rcv_buffer, priv->card ); |
| 1357 | failed_buffer_init: |
| 1358 | fw_iso_context_destroy ( context ); |
| 1359 | priv->broadcast_rcv_context = NULL; |
| 1360 | failed_context_create: |
| 1361 | fw_core_remove_address_handler ( &priv->handler ); |
| 1362 | failed_initial: |
| 1363 | priv->local_fifo = INVALID_FIFO_ADDR; |
| 1364 | return retval; |
| 1365 | } |
| 1366 | |
| 1367 | /* This is called after an "ifup" */ |
| 1368 | static int ipv4_open(struct net_device *dev) { |
| 1369 | struct ipv4_priv *priv; |
| 1370 | int ret; |
| 1371 | |
| 1372 | priv = netdev_priv(dev); |
| 1373 | if (priv->broadcast_state == IPV4_BROADCAST_ERROR) { |
| 1374 | ret = ipv4_broadcast_start ( priv ); |
| 1375 | if (ret) |
| 1376 | return ret; |
| 1377 | } |
| 1378 | netif_start_queue(dev); |
| 1379 | return 0; |
| 1380 | } |
| 1381 | |
| 1382 | /* This is called after an "ifdown" */ |
| 1383 | static int ipv4_stop(struct net_device *netdev) |
| 1384 | { |
| 1385 | /* flush priv->wake */ |
| 1386 | /* flush_scheduled_work(); */ |
| 1387 | |
| 1388 | netif_stop_queue(netdev); |
| 1389 | return 0; |
| 1390 | } |
| 1391 | |
| 1392 | /* Transmit a packet (called by kernel) */ |
| 1393 | static int ipv4_tx(struct sk_buff *skb, struct net_device *netdev) |
| 1394 | { |
| 1395 | struct ipv4_ether_hdr hdr_buf; |
| 1396 | struct ipv4_priv *priv = netdev_priv(netdev); |
| 1397 | __be16 proto; |
| 1398 | u16 dest_node; |
| 1399 | enum ipv4_tx_type tx_type; |
| 1400 | unsigned max_payload; |
| 1401 | u16 dg_size; |
| 1402 | u16 *datagram_label_ptr; |
| 1403 | struct ipv4_packet_task *ptask; |
| 1404 | struct ipv4_node *node = NULL; |
| 1405 | |
| 1406 | ptask = kmem_cache_alloc(ipv4_packet_task_cache, GFP_ATOMIC); |
| 1407 | if (ptask == NULL) |
| 1408 | goto fail; |
| 1409 | |
| 1410 | skb = skb_share_check(skb, GFP_ATOMIC); |
| 1411 | if (!skb) |
| 1412 | goto fail; |
| 1413 | |
| 1414 | /* |
| 1415 | * Get rid of the fake ipv4 header, but first make a copy. |
| 1416 | * We might need to rebuild the header on tx failure. |
| 1417 | */ |
| 1418 | memcpy(&hdr_buf, skb->data, sizeof(hdr_buf)); |
| 1419 | skb_pull(skb, sizeof(hdr_buf)); |
| 1420 | |
| 1421 | proto = hdr_buf.h_proto; |
| 1422 | dg_size = skb->len; |
| 1423 | |
| 1424 | /* |
| 1425 | * Set the transmission type for the packet. ARP packets and IP |
| 1426 | * broadcast packets are sent via GASP. |
| 1427 | */ |
| 1428 | if ( memcmp(hdr_buf.h_dest, netdev->broadcast, IPV4_ALEN) == 0 |
| 1429 | || proto == htons(ETH_P_ARP) |
| 1430 | || ( proto == htons(ETH_P_IP) |
| 1431 | && IN_MULTICAST(ntohl(ip_hdr(skb)->daddr)) ) ) { |
| 1432 | /* fw_debug ( "transmitting arp or multicast packet\n" );*/ |
| 1433 | tx_type = IPV4_GASP; |
| 1434 | dest_node = ALL_NODES; |
| 1435 | max_payload = priv->broadcast_xmt_max_payload; |
| 1436 | /* BUG_ON(max_payload < S100_BUFFER_SIZE - IPV4_GASP_OVERHEAD); */ |
| 1437 | datagram_label_ptr = &priv->broadcast_xmt_datagramlabel; |
| 1438 | ptask->fifo_addr = INVALID_FIFO_ADDR; |
| 1439 | ptask->generation = 0U; |
| 1440 | ptask->dest_node = 0U; |
| 1441 | ptask->speed = 0; |
| 1442 | } else { |
| 1443 | __be64 guid = get_unaligned((u64 *)hdr_buf.h_dest); |
| 1444 | u8 generation; |
| 1445 | |
| 1446 | node = ipv4_node_find_by_guid(priv, be64_to_cpu(guid)); |
| 1447 | if (!node) { |
| 1448 | fw_debug ( "Normal packet but no node\n" ); |
| 1449 | goto fail; |
| 1450 | } |
| 1451 | |
| 1452 | if (node->fifo == INVALID_FIFO_ADDR) { |
| 1453 | fw_debug ( "Normal packet but no fifo addr\n" ); |
| 1454 | goto fail; |
| 1455 | } |
| 1456 | |
| 1457 | /* fw_debug ( "Transmitting normal packet to %x at %llxx\n", node->nodeid, node->fifo ); */ |
| 1458 | generation = node->generation; |
| 1459 | dest_node = node->nodeid; |
| 1460 | max_payload = node->max_payload; |
| 1461 | /* BUG_ON(max_payload < S100_BUFFER_SIZE - IPV4_FRAG_HDR_SIZE); */ |
| 1462 | |
| 1463 | datagram_label_ptr = &node->datagram_label; |
| 1464 | tx_type = IPV4_WRREQ; |
| 1465 | ptask->fifo_addr = node->fifo; |
| 1466 | ptask->generation = generation; |
| 1467 | ptask->dest_node = dest_node; |
| 1468 | ptask->speed = node->xmt_speed; |
| 1469 | } |
| 1470 | |
| 1471 | /* If this is an ARP packet, convert it */ |
| 1472 | if (proto == htons(ETH_P_ARP)) { |
| 1473 | /* Convert a standard ARP packet to 1394 ARP. The first 8 bytes (the entire |
| 1474 | * arphdr) is the same format as the ip1394 header, so they overlap. The rest |
| 1475 | * needs to be munged a bit. The remainder of the arphdr is formatted based |
| 1476 | * on hwaddr len and ipaddr len. We know what they'll be, so it's easy to |
| 1477 | * judge. |
| 1478 | * |
| 1479 | * Now that the EUI is used for the hardware address all we need to do to make |
| 1480 | * this work for 1394 is to insert 2 quadlets that contain max_rec size, |
| 1481 | * speed, and unicast FIFO address information between the sender_unique_id |
| 1482 | * and the IP addresses. |
| 1483 | */ |
| 1484 | struct arphdr *arp = (struct arphdr *)skb->data; |
| 1485 | unsigned char *arp_ptr = (unsigned char *)(arp + 1); |
| 1486 | struct ipv4_arp *arp1394 = (struct ipv4_arp *)skb->data; |
| 1487 | u32 ipaddr; |
| 1488 | |
| 1489 | ipaddr = *(u32*)(arp_ptr + IPV4_ALEN); |
| 1490 | arp1394->hw_addr_len = 16; |
| 1491 | arp1394->max_rec = priv->card->max_receive; |
| 1492 | arp1394->sspd = priv->card->link_speed; |
| 1493 | arp1394->fifo_hi = htons(priv->local_fifo >> 32); |
| 1494 | arp1394->fifo_lo = htonl(priv->local_fifo & 0xFFFFFFFF); |
| 1495 | arp1394->sip = ipaddr; |
| 1496 | } |
| 1497 | if ( ipv4_max_xmt && max_payload > ipv4_max_xmt ) |
| 1498 | max_payload = ipv4_max_xmt; |
| 1499 | |
| 1500 | ptask->hdr.w0 = 0; |
| 1501 | ptask->hdr.w1 = 0; |
| 1502 | ptask->skb = skb; |
| 1503 | ptask->priv = priv; |
| 1504 | ptask->tx_type = tx_type; |
| 1505 | /* Does it all fit in one packet? */ |
| 1506 | if ( dg_size <= max_payload ) { |
| 1507 | ipv4_make_uf_hdr(&ptask->hdr, be16_to_cpu(proto)); |
| 1508 | ptask->outstanding_pkts = 1; |
| 1509 | max_payload = dg_size + IPV4_UNFRAG_HDR_SIZE; |
| 1510 | } else { |
| 1511 | u16 datagram_label; |
| 1512 | |
| 1513 | max_payload -= IPV4_FRAG_OVERHEAD; |
| 1514 | datagram_label = (*datagram_label_ptr)++; |
| 1515 | ipv4_make_ff_hdr(&ptask->hdr, be16_to_cpu(proto), dg_size, datagram_label ); |
| 1516 | ptask->outstanding_pkts = DIV_ROUND_UP(dg_size, max_payload); |
| 1517 | max_payload += IPV4_FRAG_HDR_SIZE; |
| 1518 | } |
| 1519 | ptask->max_payload = max_payload; |
| 1520 | ipv4_send_packet ( ptask ); |
| 1521 | return NETDEV_TX_OK; |
| 1522 | |
| 1523 | fail: |
| 1524 | if (ptask) |
| 1525 | kmem_cache_free(ipv4_packet_task_cache, ptask); |
| 1526 | |
| 1527 | if (skb != NULL) |
| 1528 | dev_kfree_skb(skb); |
| 1529 | |
| 1530 | netdev->stats.tx_dropped++; |
| 1531 | netdev->stats.tx_errors++; |
| 1532 | |
| 1533 | /* |
| 1534 | * FIXME: According to a patch from 2003-02-26, "returning non-zero |
| 1535 | * causes serious problems" here, allegedly. Before that patch, |
| 1536 | * -ERRNO was returned which is not appropriate under Linux 2.6. |
| 1537 | * Perhaps more needs to be done? Stop the queue in serious |
| 1538 | * conditions and restart it elsewhere? |
| 1539 | */ |
| 1540 | return NETDEV_TX_OK; |
| 1541 | } |
| 1542 | |
| 1543 | /* |
| 1544 | * FIXME: What to do if we timeout? I think a host reset is probably in order, |
| 1545 | * so that's what we do. Should we increment the stat counters too? |
| 1546 | */ |
| 1547 | static void ipv4_tx_timeout(struct net_device *dev) { |
| 1548 | struct ipv4_priv *priv; |
| 1549 | |
| 1550 | priv = netdev_priv(dev); |
| 1551 | fw_error ( "%s: Timeout, resetting host\n", dev->name ); |
| 1552 | #if 0 /* stefanr */ |
| 1553 | fw_core_initiate_bus_reset ( priv->card, 1 ); |
| 1554 | #endif |
| 1555 | } |
| 1556 | |
| 1557 | static int ipv4_change_mtu ( struct net_device *dev, int new_mtu ) { |
| 1558 | #if 0 |
| 1559 | int max_mtu; |
| 1560 | struct ipv4_priv *priv; |
| 1561 | #endif |
| 1562 | |
| 1563 | if (new_mtu < 68) |
| 1564 | return -EINVAL; |
| 1565 | |
| 1566 | #if 0 |
| 1567 | priv = netdev_priv(dev); |
| 1568 | /* This is not actually true because we can fragment packets at the firewire layer */ |
| 1569 | max_mtu = (1 << (priv->card->max_receive + 1)) |
| 1570 | - sizeof(struct ipv4_hdr) - IPV4_GASP_OVERHEAD; |
| 1571 | if (new_mtu > max_mtu) { |
| 1572 | fw_notify ( "%s: Local node constrains MTU to %d\n", dev->name, max_mtu); |
| 1573 | return -ERANGE; |
| 1574 | } |
| 1575 | #endif |
| 1576 | dev->mtu = new_mtu; |
| 1577 | return 0; |
| 1578 | } |
| 1579 | |
| 1580 | static void ipv4_get_drvinfo(struct net_device *dev, |
| 1581 | struct ethtool_drvinfo *info) { |
| 1582 | strcpy(info->driver, ipv4_driver_name); |
| 1583 | strcpy(info->bus_info, "ieee1394"); /* FIXME provide more detail? */ |
| 1584 | } |
| 1585 | |
| 1586 | static struct ethtool_ops ipv4_ethtool_ops = { |
| 1587 | .get_drvinfo = ipv4_get_drvinfo, |
| 1588 | }; |
| 1589 | |
| 1590 | static const struct net_device_ops ipv4_netdev_ops = { |
| 1591 | .ndo_open = ipv4_open, |
| 1592 | .ndo_stop = ipv4_stop, |
| 1593 | .ndo_start_xmit = ipv4_tx, |
| 1594 | .ndo_tx_timeout = ipv4_tx_timeout, |
| 1595 | .ndo_change_mtu = ipv4_change_mtu, |
| 1596 | }; |
| 1597 | |
| 1598 | static void ipv4_init_dev ( struct net_device *dev ) { |
| 1599 | dev->header_ops = &ipv4_header_ops; |
| 1600 | dev->netdev_ops = &ipv4_netdev_ops; |
| 1601 | SET_ETHTOOL_OPS(dev, &ipv4_ethtool_ops); |
| 1602 | |
| 1603 | dev->watchdog_timeo = IPV4_TIMEOUT; |
| 1604 | dev->flags = IFF_BROADCAST | IFF_MULTICAST; |
| 1605 | dev->features = NETIF_F_HIGHDMA; |
| 1606 | dev->addr_len = IPV4_ALEN; |
| 1607 | dev->hard_header_len = IPV4_HLEN; |
| 1608 | dev->type = ARPHRD_IEEE1394; |
| 1609 | |
| 1610 | /* FIXME: This value was copied from ether_setup(). Is it too much? */ |
| 1611 | dev->tx_queue_len = 1000; |
| 1612 | } |
| 1613 | |
| 1614 | static int ipv4_probe ( struct device *dev ) { |
| 1615 | struct fw_unit * unit; |
| 1616 | struct fw_device *device; |
| 1617 | struct fw_card *card; |
| 1618 | struct net_device *netdev; |
| 1619 | struct ipv4_priv *priv; |
| 1620 | unsigned max_mtu; |
| 1621 | __be64 guid; |
| 1622 | |
| 1623 | fw_debug("ipv4 Probing\n" ); |
| 1624 | unit = fw_unit ( dev ); |
| 1625 | device = fw_device ( unit->device.parent ); |
| 1626 | card = device->card; |
| 1627 | |
| 1628 | if ( ! device->is_local ) { |
| 1629 | int added; |
| 1630 | |
| 1631 | fw_debug ( "Non-local, adding remote node entry\n" ); |
| 1632 | added = ipv4_node_new ( card, device ); |
| 1633 | return added; |
| 1634 | } |
| 1635 | fw_debug("ipv4 Local: adding netdev\n" ); |
Stefan Richter | b9530fd | 2009-06-07 22:57:53 +0200 | [diff] [blame^] | 1636 | netdev = alloc_netdev ( sizeof(*priv), "firewire%d", ipv4_init_dev ); |
Jay Fenlason | c76acec | 2009-05-18 13:08:06 -0400 | [diff] [blame] | 1637 | if ( netdev == NULL) { |
| 1638 | fw_error( "Out of memory\n"); |
| 1639 | goto out; |
| 1640 | } |
| 1641 | |
| 1642 | SET_NETDEV_DEV(netdev, card->device); |
| 1643 | priv = netdev_priv(netdev); |
| 1644 | |
| 1645 | spin_lock_init(&priv->lock); |
| 1646 | priv->broadcast_state = IPV4_BROADCAST_ERROR; |
| 1647 | priv->broadcast_rcv_context = NULL; |
| 1648 | priv->broadcast_xmt_max_payload = 0; |
| 1649 | priv->broadcast_xmt_datagramlabel = 0; |
| 1650 | |
| 1651 | priv->local_fifo = INVALID_FIFO_ADDR; |
| 1652 | |
| 1653 | /* INIT_WORK(&priv->wake, ipv4_handle_queue);*/ |
| 1654 | INIT_LIST_HEAD(&priv->packet_list); |
| 1655 | INIT_LIST_HEAD(&priv->broadcasted_list); |
| 1656 | INIT_LIST_HEAD(&priv->sent_list ); |
| 1657 | |
| 1658 | priv->card = card; |
| 1659 | |
| 1660 | /* |
| 1661 | * Use the RFC 2734 default 1500 octets or the maximum payload |
| 1662 | * as initial MTU |
| 1663 | */ |
| 1664 | max_mtu = (1 << (card->max_receive + 1)) |
| 1665 | - sizeof(struct ipv4_hdr) - IPV4_GASP_OVERHEAD; |
| 1666 | netdev->mtu = min(1500U, max_mtu); |
| 1667 | |
| 1668 | /* Set our hardware address while we're at it */ |
| 1669 | guid = cpu_to_be64(card->guid); |
| 1670 | memcpy(netdev->dev_addr, &guid, sizeof(u64)); |
| 1671 | memset(netdev->broadcast, 0xff, sizeof(u64)); |
| 1672 | if ( register_netdev ( netdev ) ) { |
| 1673 | fw_error ( "Cannot register the driver\n"); |
| 1674 | goto out; |
| 1675 | } |
| 1676 | |
| 1677 | fw_notify ( "%s: IPv4 over Firewire on device %016llx\n", |
| 1678 | netdev->name, card->guid ); |
| 1679 | card->netdev = netdev; |
| 1680 | |
| 1681 | return 0 /* ipv4_new_node ( ud ) */; |
| 1682 | out: |
| 1683 | if ( netdev ) |
| 1684 | free_netdev ( netdev ); |
| 1685 | return -ENOENT; |
| 1686 | } |
| 1687 | |
| 1688 | |
| 1689 | static int ipv4_remove ( struct device *dev ) { |
| 1690 | struct fw_unit * unit; |
| 1691 | struct fw_device *device; |
| 1692 | struct fw_card *card; |
| 1693 | struct net_device *netdev; |
| 1694 | struct ipv4_priv *priv; |
| 1695 | struct ipv4_node *node; |
| 1696 | struct ipv4_partial_datagram *pd, *pd_next; |
| 1697 | struct ipv4_packet_task *ptask, *pt_next; |
| 1698 | |
| 1699 | fw_debug("ipv4 Removing\n" ); |
| 1700 | unit = fw_unit ( dev ); |
| 1701 | device = fw_device ( unit->device.parent ); |
| 1702 | card = device->card; |
| 1703 | |
| 1704 | if ( ! device->is_local ) { |
| 1705 | fw_debug ( "Node %x is non-local, removing remote node entry\n", device->node_id ); |
| 1706 | ipv4_node_delete ( card, device ); |
| 1707 | return 0; |
| 1708 | } |
| 1709 | netdev = card->netdev; |
| 1710 | if ( netdev ) { |
| 1711 | fw_debug ( "Node %x is local: deleting netdev\n", device->node_id ); |
| 1712 | priv = netdev_priv ( netdev ); |
| 1713 | unregister_netdev ( netdev ); |
| 1714 | fw_debug ( "unregistered\n" ); |
| 1715 | if ( priv->local_fifo != INVALID_FIFO_ADDR ) |
| 1716 | fw_core_remove_address_handler ( &priv->handler ); |
| 1717 | fw_debug ( "address handler gone\n" ); |
| 1718 | if ( priv->broadcast_rcv_context ) { |
| 1719 | fw_iso_context_stop ( priv->broadcast_rcv_context ); |
| 1720 | fw_iso_buffer_destroy ( &priv->broadcast_rcv_buffer, priv->card ); |
| 1721 | fw_iso_context_destroy ( priv->broadcast_rcv_context ); |
| 1722 | fw_debug ( "rcv stopped\n" ); |
| 1723 | } |
| 1724 | list_for_each_entry_safe( ptask, pt_next, &priv->packet_list, packet_list ) { |
| 1725 | dev_kfree_skb_any ( ptask->skb ); |
| 1726 | kmem_cache_free( ipv4_packet_task_cache, ptask ); |
| 1727 | } |
| 1728 | list_for_each_entry_safe( ptask, pt_next, &priv->broadcasted_list, packet_list ) { |
| 1729 | dev_kfree_skb_any ( ptask->skb ); |
| 1730 | kmem_cache_free( ipv4_packet_task_cache, ptask ); |
| 1731 | } |
| 1732 | list_for_each_entry_safe( ptask, pt_next, &priv->sent_list, packet_list ) { |
| 1733 | dev_kfree_skb_any ( ptask->skb ); |
| 1734 | kmem_cache_free( ipv4_packet_task_cache, ptask ); |
| 1735 | } |
| 1736 | fw_debug ( "lists emptied\n" ); |
| 1737 | list_for_each_entry( node, &card->ipv4_nodes, ipv4_nodes ) { |
| 1738 | if ( node->pdg_size ) { |
| 1739 | list_for_each_entry_safe( pd, pd_next, &node->pdg_list, pdg_list ) |
| 1740 | ipv4_pd_delete ( pd ); |
| 1741 | node->pdg_size = 0; |
| 1742 | } |
| 1743 | node->fifo = INVALID_FIFO_ADDR; |
| 1744 | } |
| 1745 | fw_debug ( "nodes cleaned up\n" ); |
| 1746 | free_netdev ( netdev ); |
| 1747 | card->netdev = NULL; |
| 1748 | fw_debug ( "done\n" ); |
| 1749 | } |
| 1750 | return 0; |
| 1751 | } |
| 1752 | |
| 1753 | static void ipv4_update ( struct fw_unit *unit ) { |
| 1754 | struct fw_device *device; |
| 1755 | struct fw_card *card; |
| 1756 | |
| 1757 | fw_debug ( "ipv4_update unit %p\n", unit ); |
| 1758 | device = fw_device ( unit->device.parent ); |
| 1759 | card = device->card; |
| 1760 | if ( ! device->is_local ) { |
| 1761 | struct ipv4_node *node; |
| 1762 | u64 guid; |
| 1763 | struct net_device *netdev; |
| 1764 | struct ipv4_priv *priv; |
| 1765 | |
| 1766 | netdev = card->netdev; |
| 1767 | if ( netdev ) { |
| 1768 | priv = netdev_priv ( netdev ); |
| 1769 | guid = (u64)device->config_rom[3] << 32 | device->config_rom[4]; |
| 1770 | node = ipv4_node_find_by_guid ( priv, guid ); |
| 1771 | if ( ! node ) { |
| 1772 | fw_error ( "ipv4_update: no node for device %llx\n", guid ); |
| 1773 | return; |
| 1774 | } |
| 1775 | fw_debug ( "Non-local, updating remote node entry for guid %llx old generation %x, old nodeid %x\n", guid, node->generation, node->nodeid ); |
| 1776 | node->generation = device->generation; |
| 1777 | rmb(); |
| 1778 | node->nodeid = device->node_id; |
| 1779 | fw_debug ( "New generation %x, new nodeid %x\n", node->generation, node->nodeid ); |
| 1780 | } else |
| 1781 | fw_error ( "nonlocal, but no netdev? How can that be?\n" ); |
| 1782 | } else { |
| 1783 | /* FIXME: What do we need to do on bus reset? */ |
| 1784 | fw_debug ( "Local, doing nothing\n" ); |
| 1785 | } |
| 1786 | } |
| 1787 | |
| 1788 | static struct fw_driver ipv4_driver = { |
| 1789 | .driver = { |
| 1790 | .owner = THIS_MODULE, |
| 1791 | .name = ipv4_driver_name, |
| 1792 | .bus = &fw_bus_type, |
| 1793 | .probe = ipv4_probe, |
| 1794 | .remove = ipv4_remove, |
| 1795 | }, |
| 1796 | .update = ipv4_update, |
| 1797 | .id_table = ipv4_id_table, |
| 1798 | }; |
| 1799 | |
| 1800 | static int __init ipv4_init ( void ) { |
| 1801 | int added; |
| 1802 | |
| 1803 | added = fw_core_add_descriptor ( &ipv4_unit_directory ); |
| 1804 | if ( added < 0 ) |
| 1805 | fw_error ( "Failed to add descriptor" ); |
| 1806 | ipv4_packet_task_cache = kmem_cache_create("packet_task", |
| 1807 | sizeof(struct ipv4_packet_task), 0, 0, NULL); |
| 1808 | fw_debug("Adding ipv4 module\n" ); |
| 1809 | return driver_register ( &ipv4_driver.driver ); |
| 1810 | } |
| 1811 | |
| 1812 | static void __exit ipv4_cleanup ( void ) { |
| 1813 | fw_core_remove_descriptor ( &ipv4_unit_directory ); |
| 1814 | fw_debug("Removing ipv4 module\n" ); |
| 1815 | driver_unregister ( &ipv4_driver.driver ); |
| 1816 | } |
| 1817 | |
| 1818 | module_init(ipv4_init); |
| 1819 | module_exit(ipv4_cleanup); |