Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 2 | * eth1394.c -- IPv4 driver for Linux IEEE-1394 Subsystem |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 2001-2003 Ben Collins <bcollins@debian.org> |
| 5 | * 2000 Bonin Franck <boninf@free.fr> |
| 6 | * 2003 Steve Kinneberg <kinnebergsteve@acmsystems.com> |
| 7 | * |
| 8 | * Mainly based on work by Emanuel Pirker and Andreas E. Bombe |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; either version 2 of the License, or |
| 13 | * (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | * GNU General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with this program; if not, write to the Free Software Foundation, |
| 22 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 23 | */ |
| 24 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 25 | /* |
| 26 | * This driver intends to support RFC 2734, which describes a method for |
| 27 | * transporting IPv4 datagrams over IEEE-1394 serial busses. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | * |
| 29 | * TODO: |
| 30 | * RFC 2734 related: |
| 31 | * - Add MCAP. Limited Multicast exists only to 224.0.0.1 and 224.0.0.2. |
| 32 | * |
| 33 | * Non-RFC 2734 related: |
| 34 | * - Handle fragmented skb's coming from the networking layer. |
| 35 | * - Move generic GASP reception to core 1394 code |
| 36 | * - Convert kmalloc/kfree for link fragments to use kmem_cache_* instead |
| 37 | * - Stability improvements |
| 38 | * - Performance enhancements |
| 39 | * - Consider garbage collecting old partial datagrams after X amount of time |
| 40 | */ |
| 41 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #include <linux/module.h> |
| 43 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include <linux/kernel.h> |
| 45 | #include <linux/slab.h> |
| 46 | #include <linux/errno.h> |
| 47 | #include <linux/types.h> |
| 48 | #include <linux/delay.h> |
| 49 | #include <linux/init.h> |
Stefan Richter | 7a97bc0 | 2007-05-05 17:25:51 +0200 | [diff] [blame] | 50 | #include <linux/workqueue.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
| 52 | #include <linux/netdevice.h> |
| 53 | #include <linux/inetdevice.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | #include <linux/if_arp.h> |
| 55 | #include <linux/if_ether.h> |
| 56 | #include <linux/ip.h> |
| 57 | #include <linux/in.h> |
| 58 | #include <linux/tcp.h> |
| 59 | #include <linux/skbuff.h> |
| 60 | #include <linux/bitops.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | #include <asm/uaccess.h> |
| 62 | #include <asm/delay.h> |
David S. Miller | c20e394 | 2006-10-29 16:14:55 -0800 | [diff] [blame] | 63 | #include <asm/unaligned.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | #include <net/arp.h> |
| 65 | |
Stefan Richter | de4394f | 2006-07-03 12:02:29 -0400 | [diff] [blame] | 66 | #include "config_roms.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | #include "csr1212.h" |
Stefan Richter | de4394f | 2006-07-03 12:02:29 -0400 | [diff] [blame] | 68 | #include "eth1394.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | #include "highlevel.h" |
Stefan Richter | de4394f | 2006-07-03 12:02:29 -0400 | [diff] [blame] | 70 | #include "ieee1394.h" |
| 71 | #include "ieee1394_core.h" |
| 72 | #include "ieee1394_hotplug.h" |
| 73 | #include "ieee1394_transactions.h" |
| 74 | #include "ieee1394_types.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | #include "iso.h" |
| 76 | #include "nodemgr.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | |
| 78 | #define ETH1394_PRINT_G(level, fmt, args...) \ |
| 79 | printk(level "%s: " fmt, driver_name, ## args) |
| 80 | |
| 81 | #define ETH1394_PRINT(level, dev_name, fmt, args...) \ |
| 82 | printk(level "%s: %s: " fmt, driver_name, dev_name, ## args) |
| 83 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | struct fragment_info { |
| 85 | struct list_head list; |
| 86 | int offset; |
| 87 | int len; |
| 88 | }; |
| 89 | |
| 90 | struct partial_datagram { |
| 91 | struct list_head list; |
| 92 | u16 dgl; |
| 93 | u16 dg_size; |
Harvey Harrison | faf26bc | 2008-12-13 15:03:06 -0800 | [diff] [blame] | 94 | __be16 ether_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | struct sk_buff *skb; |
| 96 | char *pbuf; |
| 97 | struct list_head frag_info; |
| 98 | }; |
| 99 | |
| 100 | struct pdg_list { |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 101 | struct list_head list; /* partial datagram list per node */ |
| 102 | unsigned int sz; /* partial datagram list size per node */ |
| 103 | spinlock_t lock; /* partial datagram lock */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | }; |
| 105 | |
| 106 | struct eth1394_host_info { |
| 107 | struct hpsb_host *host; |
| 108 | struct net_device *dev; |
| 109 | }; |
| 110 | |
| 111 | struct eth1394_node_ref { |
| 112 | struct unit_directory *ud; |
| 113 | struct list_head list; |
| 114 | }; |
| 115 | |
| 116 | struct eth1394_node_info { |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 117 | u16 maxpayload; /* max payload */ |
| 118 | u8 sspd; /* max speed */ |
| 119 | u64 fifo; /* FIFO address */ |
| 120 | struct pdg_list pdg; /* partial RX datagram lists */ |
| 121 | int dgl; /* outgoing datagram label */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | }; |
| 123 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 124 | static const char driver_name[] = "eth1394"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 126 | static struct kmem_cache *packet_task_cache; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | |
| 128 | static struct hpsb_highlevel eth1394_highlevel; |
| 129 | |
| 130 | /* Use common.lf to determine header len */ |
| 131 | static const int hdr_type_len[] = { |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 132 | sizeof(struct eth1394_uf_hdr), |
| 133 | sizeof(struct eth1394_ff_hdr), |
| 134 | sizeof(struct eth1394_sf_hdr), |
| 135 | sizeof(struct eth1394_sf_hdr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | }; |
| 137 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | static const u16 eth1394_speedto_maxpayload[] = { |
| 139 | /* S100, S200, S400, S800, S1600, S3200 */ |
| 140 | 512, 1024, 2048, 4096, 4096, 4096 |
| 141 | }; |
| 142 | |
| 143 | MODULE_AUTHOR("Ben Collins (bcollins@debian.org)"); |
| 144 | MODULE_DESCRIPTION("IEEE 1394 IPv4 Driver (IPv4-over-1394 as per RFC 2734)"); |
| 145 | MODULE_LICENSE("GPL"); |
| 146 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 147 | /* |
| 148 | * The max_partial_datagrams parameter is the maximum number of fragmented |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | * datagrams per node that eth1394 will keep in memory. Providing an upper |
| 150 | * bound allows us to limit the amount of memory that partial datagrams |
| 151 | * consume in the event that some partial datagrams are never completed. |
| 152 | */ |
| 153 | static int max_partial_datagrams = 25; |
| 154 | module_param(max_partial_datagrams, int, S_IRUGO | S_IWUSR); |
| 155 | MODULE_PARM_DESC(max_partial_datagrams, |
| 156 | "Maximum number of partially received fragmented datagrams " |
| 157 | "(default = 25)."); |
| 158 | |
| 159 | |
| 160 | static int ether1394_header(struct sk_buff *skb, struct net_device *dev, |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 161 | unsigned short type, const void *daddr, |
| 162 | const void *saddr, unsigned len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | static int ether1394_rebuild_header(struct sk_buff *skb); |
Stephen Hemminger | b95cce3 | 2007-09-26 22:13:38 -0700 | [diff] [blame] | 164 | static int ether1394_header_parse(const struct sk_buff *skb, |
| 165 | unsigned char *haddr); |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 166 | static int ether1394_header_cache(const struct neighbour *neigh, |
| 167 | struct hh_cache *hh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | static void ether1394_header_cache_update(struct hh_cache *hh, |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 169 | const struct net_device *dev, |
| 170 | const unsigned char *haddr); |
Stephen Hemminger | 6fef4c0 | 2009-08-31 19:50:41 +0000 | [diff] [blame] | 171 | static netdev_tx_t ether1394_tx(struct sk_buff *skb, |
| 172 | struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | static void ether1394_iso(struct hpsb_iso *iso); |
| 174 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | static int ether1394_write(struct hpsb_host *host, int srcid, int destid, |
| 176 | quadlet_t *data, u64 addr, size_t len, u16 flags); |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 177 | static void ether1394_add_host(struct hpsb_host *host); |
| 178 | static void ether1394_remove_host(struct hpsb_host *host); |
| 179 | static void ether1394_host_reset(struct hpsb_host *host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | |
| 181 | /* Function for incoming 1394 packets */ |
Tobias Klauser | 1c4fb57 | 2009-02-09 22:05:06 +0100 | [diff] [blame] | 182 | static const struct hpsb_address_ops addr_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | .write = ether1394_write, |
| 184 | }; |
| 185 | |
| 186 | /* Ieee1394 highlevel driver functions */ |
| 187 | static struct hpsb_highlevel eth1394_highlevel = { |
| 188 | .name = driver_name, |
| 189 | .add_host = ether1394_add_host, |
| 190 | .remove_host = ether1394_remove_host, |
| 191 | .host_reset = ether1394_host_reset, |
| 192 | }; |
| 193 | |
Stefan Richter | 5009d26 | 2007-04-02 02:15:53 +0200 | [diff] [blame] | 194 | static int ether1394_recv_init(struct eth1394_priv *priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | { |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 196 | unsigned int iso_buf_size; |
| 197 | |
| 198 | /* FIXME: rawiso limits us to PAGE_SIZE */ |
| 199 | iso_buf_size = min((unsigned int)PAGE_SIZE, |
| 200 | 2 * (1U << (priv->host->csr.max_rec + 1))); |
Jean Delvare | 09d7a96 | 2007-04-01 10:06:33 +0200 | [diff] [blame] | 201 | |
| 202 | priv->iso = hpsb_iso_recv_init(priv->host, |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 203 | ETHER1394_GASP_BUFFERS * iso_buf_size, |
Jean Delvare | 09d7a96 | 2007-04-01 10:06:33 +0200 | [diff] [blame] | 204 | ETHER1394_GASP_BUFFERS, |
| 205 | priv->broadcast_channel, |
| 206 | HPSB_ISO_DMA_PACKET_PER_BUFFER, |
| 207 | 1, ether1394_iso); |
| 208 | if (priv->iso == NULL) { |
Stefan Richter | 5009d26 | 2007-04-02 02:15:53 +0200 | [diff] [blame] | 209 | ETH1394_PRINT_G(KERN_ERR, "Failed to allocate IR context\n"); |
Jean Delvare | 09d7a96 | 2007-04-01 10:06:33 +0200 | [diff] [blame] | 210 | priv->bc_state = ETHER1394_BC_ERROR; |
| 211 | return -EAGAIN; |
| 212 | } |
| 213 | |
| 214 | if (hpsb_iso_recv_start(priv->iso, -1, (1 << 3), -1) < 0) |
| 215 | priv->bc_state = ETHER1394_BC_STOPPED; |
| 216 | else |
| 217 | priv->bc_state = ETHER1394_BC_RUNNING; |
| 218 | return 0; |
| 219 | } |
| 220 | |
| 221 | /* This is called after an "ifup" */ |
| 222 | static int ether1394_open(struct net_device *dev) |
| 223 | { |
| 224 | struct eth1394_priv *priv = netdev_priv(dev); |
| 225 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | if (priv->bc_state == ETHER1394_BC_ERROR) { |
Stefan Richter | 5009d26 | 2007-04-02 02:15:53 +0200 | [diff] [blame] | 228 | ret = ether1394_recv_init(priv); |
Jean Delvare | 09d7a96 | 2007-04-01 10:06:33 +0200 | [diff] [blame] | 229 | if (ret) |
| 230 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | } |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 232 | netif_start_queue(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | return 0; |
| 234 | } |
| 235 | |
| 236 | /* This is called after an "ifdown" */ |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 237 | static int ether1394_stop(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | { |
Stefan Richter | 7a97bc0 | 2007-05-05 17:25:51 +0200 | [diff] [blame] | 239 | /* flush priv->wake */ |
| 240 | flush_scheduled_work(); |
| 241 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 242 | netif_stop_queue(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | return 0; |
| 244 | } |
| 245 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 246 | /* FIXME: What to do if we timeout? I think a host reset is probably in order, |
| 247 | * so that's what we do. Should we increment the stat counters too? */ |
| 248 | static void ether1394_tx_timeout(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | { |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 250 | struct hpsb_host *host = |
| 251 | ((struct eth1394_priv *)netdev_priv(dev))->host; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | |
Stefan Richter | 246a5fd | 2007-04-02 02:16:40 +0200 | [diff] [blame] | 253 | ETH1394_PRINT(KERN_ERR, dev->name, "Timeout, resetting host\n"); |
| 254 | ether1394_host_reset(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | } |
| 256 | |
Stefan Richter | 17bab40 | 2007-04-03 23:55:40 +0200 | [diff] [blame] | 257 | static inline int ether1394_max_mtu(struct hpsb_host* host) |
| 258 | { |
| 259 | return (1 << (host->csr.max_rec + 1)) |
| 260 | - sizeof(union eth1394_hdr) - ETHER1394_GASP_OVERHEAD; |
| 261 | } |
| 262 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | static int ether1394_change_mtu(struct net_device *dev, int new_mtu) |
| 264 | { |
Stefan Richter | 17bab40 | 2007-04-03 23:55:40 +0200 | [diff] [blame] | 265 | int max_mtu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | |
Stefan Richter | 17bab40 | 2007-04-03 23:55:40 +0200 | [diff] [blame] | 267 | if (new_mtu < 68) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | return -EINVAL; |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 269 | |
Stefan Richter | 17bab40 | 2007-04-03 23:55:40 +0200 | [diff] [blame] | 270 | max_mtu = ether1394_max_mtu( |
| 271 | ((struct eth1394_priv *)netdev_priv(dev))->host); |
| 272 | if (new_mtu > max_mtu) { |
| 273 | ETH1394_PRINT(KERN_INFO, dev->name, |
| 274 | "Local node constrains MTU to %d\n", max_mtu); |
| 275 | return -ERANGE; |
| 276 | } |
| 277 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | dev->mtu = new_mtu; |
| 279 | return 0; |
| 280 | } |
| 281 | |
| 282 | static void purge_partial_datagram(struct list_head *old) |
| 283 | { |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 284 | struct partial_datagram *pd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | struct list_head *lh, *n; |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 286 | struct fragment_info *fi; |
| 287 | |
| 288 | pd = list_entry(old, struct partial_datagram, list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | |
| 290 | list_for_each_safe(lh, n, &pd->frag_info) { |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 291 | fi = list_entry(lh, struct fragment_info, list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | list_del(lh); |
| 293 | kfree(fi); |
| 294 | } |
| 295 | list_del(old); |
| 296 | kfree_skb(pd->skb); |
| 297 | kfree(pd); |
| 298 | } |
| 299 | |
| 300 | /****************************************** |
| 301 | * 1394 bus activity functions |
| 302 | ******************************************/ |
| 303 | |
| 304 | static struct eth1394_node_ref *eth1394_find_node(struct list_head *inl, |
| 305 | struct unit_directory *ud) |
| 306 | { |
| 307 | struct eth1394_node_ref *node; |
| 308 | |
| 309 | list_for_each_entry(node, inl, list) |
| 310 | if (node->ud == ud) |
| 311 | return node; |
| 312 | |
| 313 | return NULL; |
| 314 | } |
| 315 | |
| 316 | static struct eth1394_node_ref *eth1394_find_node_guid(struct list_head *inl, |
| 317 | u64 guid) |
| 318 | { |
| 319 | struct eth1394_node_ref *node; |
| 320 | |
| 321 | list_for_each_entry(node, inl, list) |
| 322 | if (node->ud->ne->guid == guid) |
| 323 | return node; |
| 324 | |
| 325 | return NULL; |
| 326 | } |
| 327 | |
| 328 | static struct eth1394_node_ref *eth1394_find_node_nodeid(struct list_head *inl, |
| 329 | nodeid_t nodeid) |
| 330 | { |
| 331 | struct eth1394_node_ref *node; |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 332 | |
| 333 | list_for_each_entry(node, inl, list) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | if (node->ud->ne->nodeid == nodeid) |
| 335 | return node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | |
| 337 | return NULL; |
| 338 | } |
| 339 | |
Stefan Richter | d06c1dd | 2007-04-02 02:14:45 +0200 | [diff] [blame] | 340 | static int eth1394_new_node(struct eth1394_host_info *hi, |
| 341 | struct unit_directory *ud) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | struct eth1394_priv *priv; |
| 344 | struct eth1394_node_ref *new_node; |
| 345 | struct eth1394_node_info *node_info; |
| 346 | |
Stefan Richter | 5e7abcc | 2007-04-02 02:13:51 +0200 | [diff] [blame] | 347 | new_node = kmalloc(sizeof(*new_node), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | if (!new_node) |
| 349 | return -ENOMEM; |
| 350 | |
Stefan Richter | 5e7abcc | 2007-04-02 02:13:51 +0200 | [diff] [blame] | 351 | node_info = kmalloc(sizeof(*node_info), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | if (!node_info) { |
| 353 | kfree(new_node); |
| 354 | return -ENOMEM; |
| 355 | } |
| 356 | |
| 357 | spin_lock_init(&node_info->pdg.lock); |
| 358 | INIT_LIST_HEAD(&node_info->pdg.list); |
| 359 | node_info->pdg.sz = 0; |
Ben Collins | 6737231 | 2006-06-12 18:15:31 -0400 | [diff] [blame] | 360 | node_info->fifo = CSR1212_INVALID_ADDR_SPACE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | |
Greg Kroah-Hartman | bab0305 | 2009-04-30 14:43:31 -0700 | [diff] [blame] | 362 | dev_set_drvdata(&ud->device, node_info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | new_node->ud = ud; |
| 364 | |
| 365 | priv = netdev_priv(hi->dev); |
| 366 | list_add_tail(&new_node->list, &priv->ip_node_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | return 0; |
| 368 | } |
| 369 | |
Stefan Richter | d06c1dd | 2007-04-02 02:14:45 +0200 | [diff] [blame] | 370 | static int eth1394_probe(struct device *dev) |
| 371 | { |
| 372 | struct unit_directory *ud; |
| 373 | struct eth1394_host_info *hi; |
| 374 | |
| 375 | ud = container_of(dev, struct unit_directory, device); |
| 376 | hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host); |
| 377 | if (!hi) |
| 378 | return -ENOENT; |
| 379 | |
| 380 | return eth1394_new_node(hi, ud); |
| 381 | } |
| 382 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | static int eth1394_remove(struct device *dev) |
| 384 | { |
| 385 | struct unit_directory *ud; |
| 386 | struct eth1394_host_info *hi; |
| 387 | struct eth1394_priv *priv; |
| 388 | struct eth1394_node_ref *old_node; |
| 389 | struct eth1394_node_info *node_info; |
| 390 | struct list_head *lh, *n; |
| 391 | unsigned long flags; |
| 392 | |
| 393 | ud = container_of(dev, struct unit_directory, device); |
| 394 | hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host); |
| 395 | if (!hi) |
| 396 | return -ENOENT; |
| 397 | |
| 398 | priv = netdev_priv(hi->dev); |
| 399 | |
| 400 | old_node = eth1394_find_node(&priv->ip_node_list, ud); |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 401 | if (!old_node) |
| 402 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 404 | list_del(&old_node->list); |
| 405 | kfree(old_node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | |
Greg Kroah-Hartman | bab0305 | 2009-04-30 14:43:31 -0700 | [diff] [blame] | 407 | node_info = dev_get_drvdata(&ud->device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 409 | spin_lock_irqsave(&node_info->pdg.lock, flags); |
| 410 | /* The partial datagram list should be empty, but we'll just |
| 411 | * make sure anyway... */ |
| 412 | list_for_each_safe(lh, n, &node_info->pdg.list) |
| 413 | purge_partial_datagram(lh); |
| 414 | spin_unlock_irqrestore(&node_info->pdg.lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 416 | kfree(node_info); |
Greg Kroah-Hartman | bab0305 | 2009-04-30 14:43:31 -0700 | [diff] [blame] | 417 | dev_set_drvdata(&ud->device, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | return 0; |
| 419 | } |
| 420 | |
| 421 | static int eth1394_update(struct unit_directory *ud) |
| 422 | { |
| 423 | struct eth1394_host_info *hi; |
| 424 | struct eth1394_priv *priv; |
| 425 | struct eth1394_node_ref *node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | |
| 427 | hi = hpsb_get_hostinfo(ð1394_highlevel, ud->ne->host); |
| 428 | if (!hi) |
| 429 | return -ENOENT; |
| 430 | |
| 431 | priv = netdev_priv(hi->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | node = eth1394_find_node(&priv->ip_node_list, ud); |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 433 | if (node) |
| 434 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | |
Stefan Richter | d06c1dd | 2007-04-02 02:14:45 +0200 | [diff] [blame] | 436 | return eth1394_new_node(hi, ud); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | } |
| 438 | |
Stefan Richter | c640946 | 2009-02-15 23:11:38 +0100 | [diff] [blame] | 439 | static const struct ieee1394_device_id eth1394_id_table[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | { |
| 441 | .match_flags = (IEEE1394_MATCH_SPECIFIER_ID | |
| 442 | IEEE1394_MATCH_VERSION), |
| 443 | .specifier_id = ETHER1394_GASP_SPECIFIER_ID, |
| 444 | .version = ETHER1394_GASP_VERSION, |
| 445 | }, |
| 446 | {} |
| 447 | }; |
| 448 | |
| 449 | MODULE_DEVICE_TABLE(ieee1394, eth1394_id_table); |
| 450 | |
| 451 | static struct hpsb_protocol_driver eth1394_proto_driver = { |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 452 | .name = driver_name, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | .id_table = eth1394_id_table, |
| 454 | .update = eth1394_update, |
| 455 | .driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | .probe = eth1394_probe, |
| 457 | .remove = eth1394_remove, |
| 458 | }, |
| 459 | }; |
| 460 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 461 | static void ether1394_reset_priv(struct net_device *dev, int set_mtu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | { |
| 463 | unsigned long flags; |
| 464 | int i; |
| 465 | struct eth1394_priv *priv = netdev_priv(dev); |
| 466 | struct hpsb_host *host = priv->host; |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 467 | u64 guid = get_unaligned((u64 *)&(host->csr.rom->bus_info_data[3])); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | int max_speed = IEEE1394_SPEED_MAX; |
| 469 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 470 | spin_lock_irqsave(&priv->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | |
Stefan Richter | 027611b | 2007-04-02 02:15:21 +0200 | [diff] [blame] | 472 | memset(priv->ud_list, 0, sizeof(priv->ud_list)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | priv->bc_maxpayload = 512; |
| 474 | |
| 475 | /* Determine speed limit */ |
Stefan Richter | 21b2c56 | 2007-04-23 21:28:47 +0200 | [diff] [blame] | 476 | /* FIXME: This is broken for nodes with link speed < PHY speed, |
| 477 | * and it is suboptimal for S200B...S800B hardware. |
| 478 | * The result of nodemgr's speed probe should be used somehow. */ |
| 479 | for (i = 0; i < host->node_count; i++) { |
| 480 | /* take care of S100B...S400B PHY ports */ |
| 481 | if (host->speed[i] == SELFID_SPEED_UNKNOWN) { |
| 482 | max_speed = IEEE1394_SPEED_100; |
| 483 | break; |
| 484 | } |
Ben Collins | 647dcb5 | 2006-06-12 18:12:37 -0400 | [diff] [blame] | 485 | if (max_speed > host->speed[i]) |
| 486 | max_speed = host->speed[i]; |
Stefan Richter | 21b2c56 | 2007-04-23 21:28:47 +0200 | [diff] [blame] | 487 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | priv->bc_sspd = max_speed; |
| 489 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | if (set_mtu) { |
Stefan Richter | 17bab40 | 2007-04-03 23:55:40 +0200 | [diff] [blame] | 491 | /* Use the RFC 2734 default 1500 octets or the maximum payload |
| 492 | * as initial MTU */ |
| 493 | dev->mtu = min(1500, ether1394_max_mtu(host)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | |
| 495 | /* Set our hardware address while we're at it */ |
David S. Miller | c20e394 | 2006-10-29 16:14:55 -0800 | [diff] [blame] | 496 | memcpy(dev->dev_addr, &guid, sizeof(u64)); |
| 497 | memset(dev->broadcast, 0xff, sizeof(u64)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | } |
| 499 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 500 | spin_unlock_irqrestore(&priv->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | } |
| 502 | |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 503 | static const struct header_ops ether1394_header_ops = { |
| 504 | .create = ether1394_header, |
| 505 | .rebuild = ether1394_rebuild_header, |
| 506 | .cache = ether1394_header_cache, |
| 507 | .cache_update = ether1394_header_cache_update, |
| 508 | .parse = ether1394_header_parse, |
| 509 | }; |
| 510 | |
Stephen Hemminger | 79994c9 | 2009-01-06 12:54:56 +0000 | [diff] [blame] | 511 | static const struct net_device_ops ether1394_netdev_ops = { |
| 512 | .ndo_open = ether1394_open, |
| 513 | .ndo_stop = ether1394_stop, |
| 514 | .ndo_start_xmit = ether1394_tx, |
Stephen Hemminger | 79994c9 | 2009-01-06 12:54:56 +0000 | [diff] [blame] | 515 | .ndo_tx_timeout = ether1394_tx_timeout, |
| 516 | .ndo_change_mtu = ether1394_change_mtu, |
| 517 | }; |
| 518 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 519 | static void ether1394_init_dev(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 522 | dev->header_ops = ðer1394_header_ops; |
Stephen Hemminger | 79994c9 | 2009-01-06 12:54:56 +0000 | [diff] [blame] | 523 | dev->netdev_ops = ðer1394_netdev_ops; |
Stefan Richter | 01590d2 | 2007-04-02 02:20:37 +0200 | [diff] [blame] | 524 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | dev->watchdog_timeo = ETHER1394_TIMEOUT; |
| 526 | dev->flags = IFF_BROADCAST | IFF_MULTICAST; |
| 527 | dev->features = NETIF_F_HIGHDMA; |
| 528 | dev->addr_len = ETH1394_ALEN; |
| 529 | dev->hard_header_len = ETH1394_HLEN; |
| 530 | dev->type = ARPHRD_IEEE1394; |
| 531 | |
Stefan Richter | 01590d2 | 2007-04-02 02:20:37 +0200 | [diff] [blame] | 532 | /* FIXME: This value was copied from ether_setup(). Is it too much? */ |
| 533 | dev->tx_queue_len = 1000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | } |
| 535 | |
| 536 | /* |
Stefan Richter | 7a97bc0 | 2007-05-05 17:25:51 +0200 | [diff] [blame] | 537 | * Wake the queue up after commonly encountered transmit failure conditions are |
| 538 | * hopefully over. Currently only tlabel exhaustion is accounted for. |
| 539 | */ |
| 540 | static void ether1394_wake_queue(struct work_struct *work) |
| 541 | { |
| 542 | struct eth1394_priv *priv; |
| 543 | struct hpsb_packet *packet; |
| 544 | |
| 545 | priv = container_of(work, struct eth1394_priv, wake); |
| 546 | packet = hpsb_alloc_packet(0); |
| 547 | |
| 548 | /* This is really bad, but unjam the queue anyway. */ |
| 549 | if (!packet) |
| 550 | goto out; |
| 551 | |
| 552 | packet->host = priv->host; |
| 553 | packet->node_id = priv->wake_node; |
| 554 | /* |
| 555 | * A transaction label is all we really want. If we get one, it almost |
| 556 | * always means we can get a lot more because the ieee1394 core recycled |
| 557 | * a whole batch of tlabels, at last. |
| 558 | */ |
| 559 | if (hpsb_get_tlabel(packet) == 0) |
| 560 | hpsb_free_tlabel(packet); |
| 561 | |
| 562 | hpsb_free_packet(packet); |
| 563 | out: |
| 564 | netif_wake_queue(priv->wake_dev); |
| 565 | } |
| 566 | |
| 567 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | * This function is called every time a card is found. It is generally called |
| 569 | * when the module is installed. This is where we add all of our ethernet |
| 570 | * devices. One for each host. |
| 571 | */ |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 572 | static void ether1394_add_host(struct hpsb_host *host) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | { |
| 574 | struct eth1394_host_info *hi = NULL; |
| 575 | struct net_device *dev = NULL; |
| 576 | struct eth1394_priv *priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | u64 fifo_addr; |
| 578 | |
Stefan Richter | 70093cf | 2007-03-27 01:36:50 +0200 | [diff] [blame] | 579 | if (hpsb_config_rom_ip1394_add(host) != 0) { |
| 580 | ETH1394_PRINT_G(KERN_ERR, "Can't add IP-over-1394 ROM entry\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | return; |
Stefan Richter | 70093cf | 2007-03-27 01:36:50 +0200 | [diff] [blame] | 582 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | |
Ben Collins | 6737231 | 2006-06-12 18:15:31 -0400 | [diff] [blame] | 584 | fifo_addr = hpsb_allocate_and_register_addrspace( |
| 585 | ð1394_highlevel, host, &addr_ops, |
| 586 | ETHER1394_REGION_ADDR_LEN, ETHER1394_REGION_ADDR_LEN, |
| 587 | CSR1212_INVALID_ADDR_SPACE, CSR1212_INVALID_ADDR_SPACE); |
Stefan Richter | 157188c | 2007-02-10 23:56:38 +0100 | [diff] [blame] | 588 | if (fifo_addr == CSR1212_INVALID_ADDR_SPACE) { |
| 589 | ETH1394_PRINT_G(KERN_ERR, "Cannot register CSR space\n"); |
Stefan Richter | 70093cf | 2007-03-27 01:36:50 +0200 | [diff] [blame] | 590 | hpsb_config_rom_ip1394_remove(host); |
Stefan Richter | 157188c | 2007-02-10 23:56:38 +0100 | [diff] [blame] | 591 | return; |
| 592 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | |
Stefan Richter | 01590d2 | 2007-04-02 02:20:37 +0200 | [diff] [blame] | 594 | dev = alloc_netdev(sizeof(*priv), "eth%d", ether1394_init_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | if (dev == NULL) { |
Stefan Richter | 5009d26 | 2007-04-02 02:15:53 +0200 | [diff] [blame] | 596 | ETH1394_PRINT_G(KERN_ERR, "Out of memory\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | goto out; |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 598 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | |
Stefan Richter | 8e4dc40 | 2007-05-27 23:14:05 +0200 | [diff] [blame] | 600 | SET_NETDEV_DEV(dev, &host->device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | |
| 602 | priv = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | INIT_LIST_HEAD(&priv->ip_node_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | spin_lock_init(&priv->lock); |
| 605 | priv->host = host; |
| 606 | priv->local_fifo = fifo_addr; |
Stefan Richter | 7a97bc0 | 2007-05-05 17:25:51 +0200 | [diff] [blame] | 607 | INIT_WORK(&priv->wake, ether1394_wake_queue); |
| 608 | priv->wake_dev = dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | |
| 610 | hi = hpsb_create_hostinfo(ð1394_highlevel, host, sizeof(*hi)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | if (hi == NULL) { |
Stefan Richter | 5009d26 | 2007-04-02 02:15:53 +0200 | [diff] [blame] | 612 | ETH1394_PRINT_G(KERN_ERR, "Out of memory\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | goto out; |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 614 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | |
Stefan Richter | 01590d2 | 2007-04-02 02:20:37 +0200 | [diff] [blame] | 616 | ether1394_reset_priv(dev, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | |
Stefan Richter | 5009d26 | 2007-04-02 02:15:53 +0200 | [diff] [blame] | 618 | if (register_netdev(dev)) { |
| 619 | ETH1394_PRINT_G(KERN_ERR, "Cannot register the driver\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | goto out; |
| 621 | } |
| 622 | |
Stefan Richter | 5009d26 | 2007-04-02 02:15:53 +0200 | [diff] [blame] | 623 | ETH1394_PRINT(KERN_INFO, dev->name, "IPv4 over IEEE 1394 (fw-host%d)\n", |
| 624 | host->id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | |
| 626 | hi->host = host; |
| 627 | hi->dev = dev; |
| 628 | |
| 629 | /* Ignore validity in hopes that it will be set in the future. It'll |
| 630 | * be checked when the eth device is opened. */ |
| 631 | priv->broadcast_channel = host->csr.broadcast_channel & 0x3f; |
| 632 | |
Stefan Richter | 5009d26 | 2007-04-02 02:15:53 +0200 | [diff] [blame] | 633 | ether1394_recv_init(priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | out: |
Stefan Richter | 157188c | 2007-02-10 23:56:38 +0100 | [diff] [blame] | 636 | if (dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | free_netdev(dev); |
| 638 | if (hi) |
| 639 | hpsb_destroy_hostinfo(ð1394_highlevel, host); |
Stefan Richter | 157188c | 2007-02-10 23:56:38 +0100 | [diff] [blame] | 640 | hpsb_unregister_addrspace(ð1394_highlevel, host, fifo_addr); |
Stefan Richter | 70093cf | 2007-03-27 01:36:50 +0200 | [diff] [blame] | 641 | hpsb_config_rom_ip1394_remove(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | } |
| 643 | |
| 644 | /* Remove a card from our list */ |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 645 | static void ether1394_remove_host(struct hpsb_host *host) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | { |
| 647 | struct eth1394_host_info *hi; |
Stefan Richter | 2cd556a | 2007-02-10 23:57:57 +0100 | [diff] [blame] | 648 | struct eth1394_priv *priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | |
| 650 | hi = hpsb_get_hostinfo(ð1394_highlevel, host); |
Stefan Richter | 2cd556a | 2007-02-10 23:57:57 +0100 | [diff] [blame] | 651 | if (!hi) |
| 652 | return; |
| 653 | priv = netdev_priv(hi->dev); |
| 654 | hpsb_unregister_addrspace(ð1394_highlevel, host, priv->local_fifo); |
Stefan Richter | 70093cf | 2007-03-27 01:36:50 +0200 | [diff] [blame] | 655 | hpsb_config_rom_ip1394_remove(host); |
Stefan Richter | 2cd556a | 2007-02-10 23:57:57 +0100 | [diff] [blame] | 656 | if (priv->iso) |
| 657 | hpsb_iso_shutdown(priv->iso); |
| 658 | unregister_netdev(hi->dev); |
| 659 | free_netdev(hi->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | } |
| 661 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 662 | /* A bus reset happened */ |
| 663 | static void ether1394_host_reset(struct hpsb_host *host) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | { |
| 665 | struct eth1394_host_info *hi; |
| 666 | struct eth1394_priv *priv; |
| 667 | struct net_device *dev; |
| 668 | struct list_head *lh, *n; |
| 669 | struct eth1394_node_ref *node; |
| 670 | struct eth1394_node_info *node_info; |
| 671 | unsigned long flags; |
| 672 | |
| 673 | hi = hpsb_get_hostinfo(ð1394_highlevel, host); |
| 674 | |
| 675 | /* This can happen for hosts that we don't use */ |
Stefan Richter | 2cd556a | 2007-02-10 23:57:57 +0100 | [diff] [blame] | 676 | if (!hi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | return; |
| 678 | |
| 679 | dev = hi->dev; |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 680 | priv = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 682 | /* Reset our private host data, but not our MTU */ |
| 683 | netif_stop_queue(dev); |
| 684 | ether1394_reset_priv(dev, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | |
| 686 | list_for_each_entry(node, &priv->ip_node_list, list) { |
Greg Kroah-Hartman | bab0305 | 2009-04-30 14:43:31 -0700 | [diff] [blame] | 687 | node_info = dev_get_drvdata(&node->ud->device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | |
| 689 | spin_lock_irqsave(&node_info->pdg.lock, flags); |
| 690 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 691 | list_for_each_safe(lh, n, &node_info->pdg.list) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | purge_partial_datagram(lh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | |
| 694 | INIT_LIST_HEAD(&(node_info->pdg.list)); |
| 695 | node_info->pdg.sz = 0; |
| 696 | |
| 697 | spin_unlock_irqrestore(&node_info->pdg.lock, flags); |
| 698 | } |
| 699 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 700 | netif_wake_queue(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | } |
| 702 | |
| 703 | /****************************************** |
| 704 | * HW Header net device functions |
| 705 | ******************************************/ |
| 706 | /* These functions have been adapted from net/ethernet/eth.c */ |
| 707 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | /* Create a fake MAC header for an arbitrary protocol layer. |
| 709 | * saddr=NULL means use device source address |
| 710 | * daddr=NULL means leave destination address (eg unresolved arp). */ |
| 711 | static int ether1394_header(struct sk_buff *skb, struct net_device *dev, |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 712 | unsigned short type, const void *daddr, |
| 713 | const void *saddr, unsigned len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | { |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 715 | struct eth1394hdr *eth = |
| 716 | (struct eth1394hdr *)skb_push(skb, ETH1394_HLEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | |
| 718 | eth->h_proto = htons(type); |
| 719 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 720 | if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | memset(eth->h_dest, 0, dev->addr_len); |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 722 | return dev->hard_header_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | } |
| 724 | |
| 725 | if (daddr) { |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 726 | memcpy(eth->h_dest, daddr, dev->addr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | return dev->hard_header_len; |
| 728 | } |
| 729 | |
| 730 | return -dev->hard_header_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | } |
| 732 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | /* Rebuild the faked MAC header. This is called after an ARP |
| 734 | * (or in future other address resolution) has completed on this |
| 735 | * sk_buff. We now let ARP fill in the other fields. |
| 736 | * |
| 737 | * This routine CANNOT use cached dst->neigh! |
| 738 | * Really, it is used only when dst->neigh is wrong. |
| 739 | */ |
| 740 | static int ether1394_rebuild_header(struct sk_buff *skb) |
| 741 | { |
| 742 | struct eth1394hdr *eth = (struct eth1394hdr *)skb->data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | |
Stefan Richter | 599bba9 | 2007-04-02 02:19:02 +0200 | [diff] [blame] | 744 | if (eth->h_proto == htons(ETH_P_IP)) |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 745 | return arp_find((unsigned char *)ð->h_dest, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | |
Stefan Richter | 599bba9 | 2007-04-02 02:19:02 +0200 | [diff] [blame] | 747 | ETH1394_PRINT(KERN_DEBUG, skb->dev->name, |
| 748 | "unable to resolve type %04x addresses\n", |
| 749 | ntohs(eth->h_proto)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | return 0; |
| 751 | } |
| 752 | |
Stephen Hemminger | b95cce3 | 2007-09-26 22:13:38 -0700 | [diff] [blame] | 753 | static int ether1394_header_parse(const struct sk_buff *skb, |
| 754 | unsigned char *haddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | { |
Stephen Hemminger | b95cce3 | 2007-09-26 22:13:38 -0700 | [diff] [blame] | 756 | memcpy(haddr, skb->dev->dev_addr, ETH1394_ALEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | return ETH1394_ALEN; |
| 758 | } |
| 759 | |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 760 | static int ether1394_header_cache(const struct neighbour *neigh, |
| 761 | struct hh_cache *hh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | { |
Harvey Harrison | faf26bc | 2008-12-13 15:03:06 -0800 | [diff] [blame] | 763 | __be16 type = hh->hh_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | struct net_device *dev = neigh->dev; |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 765 | struct eth1394hdr *eth = |
| 766 | (struct eth1394hdr *)((u8 *)hh->hh_data + 16 - ETH1394_HLEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | |
Ben Collins | 7136b80 | 2006-06-12 18:16:25 -0400 | [diff] [blame] | 768 | if (type == htons(ETH_P_802_3)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | return -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | |
| 771 | eth->h_proto = type; |
| 772 | memcpy(eth->h_dest, neigh->ha, dev->addr_len); |
| 773 | |
| 774 | hh->hh_len = ETH1394_HLEN; |
| 775 | return 0; |
| 776 | } |
| 777 | |
| 778 | /* Called by Address Resolution module to notify changes in address. */ |
| 779 | static void ether1394_header_cache_update(struct hh_cache *hh, |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 780 | const struct net_device *dev, |
| 781 | const unsigned char * haddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | { |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 783 | memcpy((u8 *)hh->hh_data + 16 - ETH1394_HLEN, haddr, dev->addr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | } |
| 785 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | /****************************************** |
| 787 | * Datagram reception code |
| 788 | ******************************************/ |
| 789 | |
| 790 | /* Copied from net/ethernet/eth.c */ |
Harvey Harrison | faf26bc | 2008-12-13 15:03:06 -0800 | [diff] [blame] | 791 | static __be16 ether1394_type_trans(struct sk_buff *skb, struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | { |
| 793 | struct eth1394hdr *eth; |
| 794 | unsigned char *rawp; |
| 795 | |
Arnaldo Carvalho de Melo | 459a98e | 2007-03-19 15:30:44 -0700 | [diff] [blame] | 796 | skb_reset_mac_header(skb); |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 797 | skb_pull(skb, ETH1394_HLEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | eth = eth1394_hdr(skb); |
| 799 | |
| 800 | if (*eth->h_dest & 1) { |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 801 | if (memcmp(eth->h_dest, dev->broadcast, dev->addr_len) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | skb->pkt_type = PACKET_BROADCAST; |
| 803 | #if 0 |
| 804 | else |
| 805 | skb->pkt_type = PACKET_MULTICAST; |
| 806 | #endif |
| 807 | } else { |
| 808 | if (memcmp(eth->h_dest, dev->dev_addr, dev->addr_len)) |
| 809 | skb->pkt_type = PACKET_OTHERHOST; |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 810 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 812 | if (ntohs(eth->h_proto) >= 1536) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | return eth->h_proto; |
| 814 | |
| 815 | rawp = skb->data; |
| 816 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 817 | if (*(unsigned short *)rawp == 0xFFFF) |
| 818 | return htons(ETH_P_802_3); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 820 | return htons(ETH_P_802_2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | } |
| 822 | |
| 823 | /* Parse an encapsulated IP1394 header into an ethernet frame packet. |
| 824 | * We also perform ARP translation here, if need be. */ |
Harvey Harrison | faf26bc | 2008-12-13 15:03:06 -0800 | [diff] [blame] | 825 | static __be16 ether1394_parse_encap(struct sk_buff *skb, struct net_device *dev, |
Stefan Richter | e00f04a | 2007-03-18 12:23:11 +0100 | [diff] [blame] | 826 | nodeid_t srcid, nodeid_t destid, |
Harvey Harrison | faf26bc | 2008-12-13 15:03:06 -0800 | [diff] [blame] | 827 | __be16 ether_type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | { |
| 829 | struct eth1394_priv *priv = netdev_priv(dev); |
Harvey Harrison | faf26bc | 2008-12-13 15:03:06 -0800 | [diff] [blame] | 830 | __be64 dest_hw; |
| 831 | __be16 ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 833 | /* Setup our hw addresses. We use these to build the ethernet header. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | if (destid == (LOCAL_BUS | ALL_NODES)) |
Harvey Harrison | faf26bc | 2008-12-13 15:03:06 -0800 | [diff] [blame] | 835 | dest_hw = ~cpu_to_be64(0); /* broadcast */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 836 | else |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 837 | dest_hw = cpu_to_be64((u64)priv->host->csr.guid_hi << 32 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | priv->host->csr.guid_lo); |
| 839 | |
| 840 | /* If this is an ARP packet, convert it. First, we want to make |
| 841 | * use of some of the fields, since they tell us a little bit |
| 842 | * about the sending machine. */ |
Ben Collins | 7136b80 | 2006-06-12 18:16:25 -0400 | [diff] [blame] | 843 | if (ether_type == htons(ETH_P_ARP)) { |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 844 | struct eth1394_arp *arp1394 = (struct eth1394_arp *)skb->data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 845 | struct arphdr *arp = (struct arphdr *)skb->data; |
| 846 | unsigned char *arp_ptr = (unsigned char *)(arp + 1); |
| 847 | u64 fifo_addr = (u64)ntohs(arp1394->fifo_hi) << 32 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 848 | ntohl(arp1394->fifo_lo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | u8 max_rec = min(priv->host->csr.max_rec, |
| 850 | (u8)(arp1394->max_rec)); |
| 851 | int sspd = arp1394->sspd; |
| 852 | u16 maxpayload; |
| 853 | struct eth1394_node_ref *node; |
| 854 | struct eth1394_node_info *node_info; |
David S. Miller | c20e394 | 2006-10-29 16:14:55 -0800 | [diff] [blame] | 855 | __be64 guid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | |
| 857 | /* Sanity check. MacOSX seems to be sending us 131 in this |
| 858 | * field (atleast on my Panther G5). Not sure why. */ |
| 859 | if (sspd > 5 || sspd < 0) |
| 860 | sspd = 0; |
| 861 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 862 | maxpayload = min(eth1394_speedto_maxpayload[sspd], |
| 863 | (u16)(1 << (max_rec + 1))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | |
David S. Miller | c20e394 | 2006-10-29 16:14:55 -0800 | [diff] [blame] | 865 | guid = get_unaligned(&arp1394->s_uniq_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | node = eth1394_find_node_guid(&priv->ip_node_list, |
David S. Miller | c20e394 | 2006-10-29 16:14:55 -0800 | [diff] [blame] | 867 | be64_to_cpu(guid)); |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 868 | if (!node) |
Harvey Harrison | faf26bc | 2008-12-13 15:03:06 -0800 | [diff] [blame] | 869 | return cpu_to_be16(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | |
Greg Kroah-Hartman | bab0305 | 2009-04-30 14:43:31 -0700 | [diff] [blame] | 871 | node_info = dev_get_drvdata(&node->ud->device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | |
| 873 | /* Update our speed/payload/fifo_offset table */ |
| 874 | node_info->maxpayload = maxpayload; |
| 875 | node_info->sspd = sspd; |
| 876 | node_info->fifo = fifo_addr; |
| 877 | |
| 878 | /* Now that we're done with the 1394 specific stuff, we'll |
| 879 | * need to alter some of the data. Believe it or not, all |
| 880 | * that needs to be done is sender_IP_address needs to be |
| 881 | * moved, the destination hardware address get stuffed |
| 882 | * in and the hardware address length set to 8. |
| 883 | * |
| 884 | * IMPORTANT: The code below overwrites 1394 specific data |
| 885 | * needed above so keep the munging of the data for the |
| 886 | * higher level IP stack last. */ |
| 887 | |
| 888 | arp->ar_hln = 8; |
| 889 | arp_ptr += arp->ar_hln; /* skip over sender unique id */ |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 890 | *(u32 *)arp_ptr = arp1394->sip; /* move sender IP addr */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | arp_ptr += arp->ar_pln; /* skip over sender IP addr */ |
| 892 | |
Ben Collins | 02f4213 | 2006-06-12 18:15:11 -0400 | [diff] [blame] | 893 | if (arp->ar_op == htons(ARPOP_REQUEST)) |
David S. Miller | c20e394 | 2006-10-29 16:14:55 -0800 | [diff] [blame] | 894 | memset(arp_ptr, 0, sizeof(u64)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | else |
David S. Miller | c20e394 | 2006-10-29 16:14:55 -0800 | [diff] [blame] | 896 | memcpy(arp_ptr, dev->dev_addr, sizeof(u64)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | } |
| 898 | |
| 899 | /* Now add the ethernet header. */ |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 900 | if (dev_hard_header(skb, dev, ntohs(ether_type), &dest_hw, NULL, |
| 901 | skb->len) >= 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 902 | ret = ether1394_type_trans(skb, dev); |
| 903 | |
| 904 | return ret; |
| 905 | } |
| 906 | |
Stefan Richter | e00f04a | 2007-03-18 12:23:11 +0100 | [diff] [blame] | 907 | static int fragment_overlap(struct list_head *frag_list, int offset, int len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 908 | { |
| 909 | struct fragment_info *fi; |
Stefan Richter | 2e2173d | 2007-04-02 02:21:46 +0200 | [diff] [blame] | 910 | int end = offset + len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | |
Stefan Richter | 2e2173d | 2007-04-02 02:21:46 +0200 | [diff] [blame] | 912 | list_for_each_entry(fi, frag_list, list) |
| 913 | if (offset < fi->offset + fi->len && end > fi->offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | return 1; |
Stefan Richter | 2e2173d | 2007-04-02 02:21:46 +0200 | [diff] [blame] | 915 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | return 0; |
| 917 | } |
| 918 | |
Stefan Richter | e00f04a | 2007-03-18 12:23:11 +0100 | [diff] [blame] | 919 | static struct list_head *find_partial_datagram(struct list_head *pdgl, int dgl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | { |
| 921 | struct partial_datagram *pd; |
| 922 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 923 | list_for_each_entry(pd, pdgl, list) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 924 | if (pd->dgl == dgl) |
| 925 | return &pd->list; |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 926 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | return NULL; |
| 928 | } |
| 929 | |
| 930 | /* Assumes that new fragment does not overlap any existing fragments */ |
Stefan Richter | e00f04a | 2007-03-18 12:23:11 +0100 | [diff] [blame] | 931 | static int new_fragment(struct list_head *frag_info, int offset, int len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | { |
| 933 | struct list_head *lh; |
| 934 | struct fragment_info *fi, *fi2, *new; |
| 935 | |
| 936 | list_for_each(lh, frag_info) { |
| 937 | fi = list_entry(lh, struct fragment_info, list); |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 938 | if (fi->offset + fi->len == offset) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | /* The new fragment can be tacked on to the end */ |
| 940 | fi->len += len; |
| 941 | /* Did the new fragment plug a hole? */ |
| 942 | fi2 = list_entry(lh->next, struct fragment_info, list); |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 943 | if (fi->offset + fi->len == fi2->offset) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 944 | /* glue fragments together */ |
| 945 | fi->len += fi2->len; |
| 946 | list_del(lh->next); |
| 947 | kfree(fi2); |
| 948 | } |
| 949 | return 0; |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 950 | } else if (offset + len == fi->offset) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | /* The new fragment can be tacked on to the beginning */ |
| 952 | fi->offset = offset; |
| 953 | fi->len += len; |
| 954 | /* Did the new fragment plug a hole? */ |
| 955 | fi2 = list_entry(lh->prev, struct fragment_info, list); |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 956 | if (fi2->offset + fi2->len == fi->offset) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | /* glue fragments together */ |
| 958 | fi2->len += fi->len; |
| 959 | list_del(lh); |
| 960 | kfree(fi); |
| 961 | } |
| 962 | return 0; |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 963 | } else if (offset > fi->offset + fi->len) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | break; |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 965 | } else if (offset + len < fi->offset) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | lh = lh->prev; |
| 967 | break; |
| 968 | } |
| 969 | } |
| 970 | |
Stefan Richter | 8551158 | 2005-11-07 06:31:45 -0500 | [diff] [blame] | 971 | new = kmalloc(sizeof(*new), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | if (!new) |
| 973 | return -ENOMEM; |
| 974 | |
| 975 | new->offset = offset; |
| 976 | new->len = len; |
| 977 | |
| 978 | list_add(&new->list, lh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | return 0; |
| 980 | } |
| 981 | |
Stefan Richter | e00f04a | 2007-03-18 12:23:11 +0100 | [diff] [blame] | 982 | static int new_partial_datagram(struct net_device *dev, struct list_head *pdgl, |
| 983 | int dgl, int dg_size, char *frag_buf, |
| 984 | int frag_off, int frag_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | { |
| 986 | struct partial_datagram *new; |
| 987 | |
Stefan Richter | 8551158 | 2005-11-07 06:31:45 -0500 | [diff] [blame] | 988 | new = kmalloc(sizeof(*new), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 989 | if (!new) |
| 990 | return -ENOMEM; |
| 991 | |
| 992 | INIT_LIST_HEAD(&new->frag_info); |
| 993 | |
| 994 | if (new_fragment(&new->frag_info, frag_off, frag_len) < 0) { |
| 995 | kfree(new); |
| 996 | return -ENOMEM; |
| 997 | } |
| 998 | |
| 999 | new->dgl = dgl; |
| 1000 | new->dg_size = dg_size; |
| 1001 | |
| 1002 | new->skb = dev_alloc_skb(dg_size + dev->hard_header_len + 15); |
| 1003 | if (!new->skb) { |
| 1004 | struct fragment_info *fi = list_entry(new->frag_info.next, |
| 1005 | struct fragment_info, |
| 1006 | list); |
| 1007 | kfree(fi); |
| 1008 | kfree(new); |
| 1009 | return -ENOMEM; |
| 1010 | } |
| 1011 | |
| 1012 | skb_reserve(new->skb, (dev->hard_header_len + 15) & ~15); |
| 1013 | new->pbuf = skb_put(new->skb, dg_size); |
| 1014 | memcpy(new->pbuf + frag_off, frag_buf, frag_len); |
| 1015 | |
| 1016 | list_add(&new->list, pdgl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | return 0; |
| 1018 | } |
| 1019 | |
Stefan Richter | e00f04a | 2007-03-18 12:23:11 +0100 | [diff] [blame] | 1020 | static int update_partial_datagram(struct list_head *pdgl, struct list_head *lh, |
| 1021 | char *frag_buf, int frag_off, int frag_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1022 | { |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 1023 | struct partial_datagram *pd = |
| 1024 | list_entry(lh, struct partial_datagram, list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 1026 | if (new_fragment(&pd->frag_info, frag_off, frag_len) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | |
| 1029 | memcpy(pd->pbuf + frag_off, frag_buf, frag_len); |
| 1030 | |
| 1031 | /* Move list entry to beginnig of list so that oldest partial |
| 1032 | * datagrams percolate to the end of the list */ |
Akinobu Mita | 179e091 | 2006-06-26 00:24:41 -0700 | [diff] [blame] | 1033 | list_move(lh, pdgl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | return 0; |
| 1035 | } |
| 1036 | |
Stefan Richter | e00f04a | 2007-03-18 12:23:11 +0100 | [diff] [blame] | 1037 | static int is_datagram_complete(struct list_head *lh, int dg_size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | { |
Stefan Richter | e00f04a | 2007-03-18 12:23:11 +0100 | [diff] [blame] | 1039 | struct partial_datagram *pd; |
| 1040 | struct fragment_info *fi; |
| 1041 | |
| 1042 | pd = list_entry(lh, struct partial_datagram, list); |
| 1043 | fi = list_entry(pd->frag_info.next, struct fragment_info, list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | |
| 1045 | return (fi->len == dg_size); |
| 1046 | } |
| 1047 | |
| 1048 | /* Packet reception. We convert the IP1394 encapsulation header to an |
| 1049 | * ethernet header, and fill it with some of our other fields. This is |
| 1050 | * an incoming packet from the 1394 bus. */ |
| 1051 | static int ether1394_data_handler(struct net_device *dev, int srcid, int destid, |
| 1052 | char *buf, int len) |
| 1053 | { |
| 1054 | struct sk_buff *skb; |
| 1055 | unsigned long flags; |
| 1056 | struct eth1394_priv *priv = netdev_priv(dev); |
| 1057 | union eth1394_hdr *hdr = (union eth1394_hdr *)buf; |
Harvey Harrison | faf26bc | 2008-12-13 15:03:06 -0800 | [diff] [blame] | 1058 | __be16 ether_type = cpu_to_be16(0); /* initialized to clear warning */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | int hdr_len; |
| 1060 | struct unit_directory *ud = priv->ud_list[NODEID_TO_NODE(srcid)]; |
| 1061 | struct eth1394_node_info *node_info; |
| 1062 | |
| 1063 | if (!ud) { |
| 1064 | struct eth1394_node_ref *node; |
| 1065 | node = eth1394_find_node_nodeid(&priv->ip_node_list, srcid); |
Stefan Richter | 0993987 | 2007-04-02 02:22:21 +0200 | [diff] [blame] | 1066 | if (unlikely(!node)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | HPSB_PRINT(KERN_ERR, "ether1394 rx: sender nodeid " |
| 1068 | "lookup failure: " NODE_BUS_FMT, |
| 1069 | NODE_BUS_ARGS(priv->host, srcid)); |
Stephen Hemminger | 92dc8cc | 2009-01-06 12:56:50 +0000 | [diff] [blame] | 1070 | dev->stats.rx_dropped++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | return -1; |
| 1072 | } |
| 1073 | ud = node->ud; |
| 1074 | |
| 1075 | priv->ud_list[NODEID_TO_NODE(srcid)] = ud; |
| 1076 | } |
| 1077 | |
Greg Kroah-Hartman | bab0305 | 2009-04-30 14:43:31 -0700 | [diff] [blame] | 1078 | node_info = dev_get_drvdata(&ud->device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1079 | |
| 1080 | /* First, did we receive a fragmented or unfragmented datagram? */ |
| 1081 | hdr->words.word1 = ntohs(hdr->words.word1); |
| 1082 | |
| 1083 | hdr_len = hdr_type_len[hdr->common.lf]; |
| 1084 | |
| 1085 | if (hdr->common.lf == ETH1394_HDR_LF_UF) { |
| 1086 | /* An unfragmented datagram has been received by the ieee1394 |
| 1087 | * bus. Build an skbuff around it so we can pass it to the |
| 1088 | * high level network layer. */ |
| 1089 | |
| 1090 | skb = dev_alloc_skb(len + dev->hard_header_len + 15); |
Stefan Richter | 0993987 | 2007-04-02 02:22:21 +0200 | [diff] [blame] | 1091 | if (unlikely(!skb)) { |
Stefan Richter | 5009d26 | 2007-04-02 02:15:53 +0200 | [diff] [blame] | 1092 | ETH1394_PRINT_G(KERN_ERR, "Out of memory\n"); |
Stephen Hemminger | 92dc8cc | 2009-01-06 12:56:50 +0000 | [diff] [blame] | 1093 | dev->stats.rx_dropped++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | return -1; |
| 1095 | } |
| 1096 | skb_reserve(skb, (dev->hard_header_len + 15) & ~15); |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 1097 | memcpy(skb_put(skb, len - hdr_len), buf + hdr_len, |
| 1098 | len - hdr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | ether_type = hdr->uf.ether_type; |
| 1100 | } else { |
| 1101 | /* A datagram fragment has been received, now the fun begins. */ |
| 1102 | |
| 1103 | struct list_head *pdgl, *lh; |
| 1104 | struct partial_datagram *pd; |
| 1105 | int fg_off; |
| 1106 | int fg_len = len - hdr_len; |
| 1107 | int dg_size; |
| 1108 | int dgl; |
| 1109 | int retval; |
| 1110 | struct pdg_list *pdg = &(node_info->pdg); |
| 1111 | |
| 1112 | hdr->words.word3 = ntohs(hdr->words.word3); |
| 1113 | /* The 4th header word is reserved so no need to do ntohs() */ |
| 1114 | |
| 1115 | if (hdr->common.lf == ETH1394_HDR_LF_FF) { |
| 1116 | ether_type = hdr->ff.ether_type; |
| 1117 | dgl = hdr->ff.dgl; |
| 1118 | dg_size = hdr->ff.dg_size + 1; |
| 1119 | fg_off = 0; |
| 1120 | } else { |
| 1121 | hdr->words.word2 = ntohs(hdr->words.word2); |
| 1122 | dgl = hdr->sf.dgl; |
| 1123 | dg_size = hdr->sf.dg_size + 1; |
| 1124 | fg_off = hdr->sf.fg_off; |
| 1125 | } |
| 1126 | spin_lock_irqsave(&pdg->lock, flags); |
| 1127 | |
| 1128 | pdgl = &(pdg->list); |
| 1129 | lh = find_partial_datagram(pdgl, dgl); |
| 1130 | |
| 1131 | if (lh == NULL) { |
| 1132 | while (pdg->sz >= max_partial_datagrams) { |
| 1133 | /* remove the oldest */ |
| 1134 | purge_partial_datagram(pdgl->prev); |
| 1135 | pdg->sz--; |
| 1136 | } |
| 1137 | |
| 1138 | retval = new_partial_datagram(dev, pdgl, dgl, dg_size, |
| 1139 | buf + hdr_len, fg_off, |
| 1140 | fg_len); |
| 1141 | if (retval < 0) { |
| 1142 | spin_unlock_irqrestore(&pdg->lock, flags); |
| 1143 | goto bad_proto; |
| 1144 | } |
| 1145 | pdg->sz++; |
| 1146 | lh = find_partial_datagram(pdgl, dgl); |
| 1147 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | pd = list_entry(lh, struct partial_datagram, list); |
| 1149 | |
| 1150 | if (fragment_overlap(&pd->frag_info, fg_off, fg_len)) { |
| 1151 | /* Overlapping fragments, obliterate old |
| 1152 | * datagram and start new one. */ |
| 1153 | purge_partial_datagram(lh); |
| 1154 | retval = new_partial_datagram(dev, pdgl, dgl, |
| 1155 | dg_size, |
| 1156 | buf + hdr_len, |
| 1157 | fg_off, fg_len); |
| 1158 | if (retval < 0) { |
| 1159 | pdg->sz--; |
| 1160 | spin_unlock_irqrestore(&pdg->lock, flags); |
| 1161 | goto bad_proto; |
| 1162 | } |
| 1163 | } else { |
| 1164 | retval = update_partial_datagram(pdgl, lh, |
| 1165 | buf + hdr_len, |
| 1166 | fg_off, fg_len); |
| 1167 | if (retval < 0) { |
| 1168 | /* Couldn't save off fragment anyway |
| 1169 | * so might as well obliterate the |
| 1170 | * datagram now. */ |
| 1171 | purge_partial_datagram(lh); |
| 1172 | pdg->sz--; |
| 1173 | spin_unlock_irqrestore(&pdg->lock, flags); |
| 1174 | goto bad_proto; |
| 1175 | } |
| 1176 | } /* fragment overlap */ |
| 1177 | } /* new datagram or add to existing one */ |
| 1178 | |
| 1179 | pd = list_entry(lh, struct partial_datagram, list); |
| 1180 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 1181 | if (hdr->common.lf == ETH1394_HDR_LF_FF) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1182 | pd->ether_type = ether_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1183 | |
| 1184 | if (is_datagram_complete(lh, dg_size)) { |
| 1185 | ether_type = pd->ether_type; |
| 1186 | pdg->sz--; |
| 1187 | skb = skb_get(pd->skb); |
| 1188 | purge_partial_datagram(lh); |
| 1189 | spin_unlock_irqrestore(&pdg->lock, flags); |
| 1190 | } else { |
| 1191 | /* Datagram is not complete, we're done for the |
| 1192 | * moment. */ |
| 1193 | spin_unlock_irqrestore(&pdg->lock, flags); |
| 1194 | return 0; |
| 1195 | } |
| 1196 | } /* unframgented datagram or fragmented one */ |
| 1197 | |
| 1198 | /* Write metadata, and then pass to the receive level */ |
| 1199 | skb->dev = dev; |
| 1200 | skb->ip_summed = CHECKSUM_UNNECESSARY; /* don't check it */ |
| 1201 | |
| 1202 | /* Parse the encapsulation header. This actually does the job of |
| 1203 | * converting to an ethernet frame header, aswell as arp |
| 1204 | * conversion if needed. ARP conversion is easier in this |
| 1205 | * direction, since we are using ethernet as our backend. */ |
| 1206 | skb->protocol = ether1394_parse_encap(skb, dev, srcid, destid, |
| 1207 | ether_type); |
| 1208 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | spin_lock_irqsave(&priv->lock, flags); |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 1210 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1211 | if (!skb->protocol) { |
Stephen Hemminger | 92dc8cc | 2009-01-06 12:56:50 +0000 | [diff] [blame] | 1212 | dev->stats.rx_errors++; |
| 1213 | dev->stats.rx_dropped++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1214 | dev_kfree_skb_any(skb); |
Stefan Richter | 661afca | 2007-07-28 23:45:03 +0200 | [diff] [blame] | 1215 | } else if (netif_rx(skb) == NET_RX_DROP) { |
Stephen Hemminger | 92dc8cc | 2009-01-06 12:56:50 +0000 | [diff] [blame] | 1216 | dev->stats.rx_errors++; |
| 1217 | dev->stats.rx_dropped++; |
Stefan Richter | 661afca | 2007-07-28 23:45:03 +0200 | [diff] [blame] | 1218 | } else { |
Stephen Hemminger | 92dc8cc | 2009-01-06 12:56:50 +0000 | [diff] [blame] | 1219 | dev->stats.rx_packets++; |
| 1220 | dev->stats.rx_bytes += skb->len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1221 | } |
| 1222 | |
Stefan Richter | 661afca | 2007-07-28 23:45:03 +0200 | [diff] [blame] | 1223 | spin_unlock_irqrestore(&priv->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1224 | |
| 1225 | bad_proto: |
| 1226 | if (netif_queue_stopped(dev)) |
| 1227 | netif_wake_queue(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1228 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1229 | return 0; |
| 1230 | } |
| 1231 | |
| 1232 | static int ether1394_write(struct hpsb_host *host, int srcid, int destid, |
| 1233 | quadlet_t *data, u64 addr, size_t len, u16 flags) |
| 1234 | { |
| 1235 | struct eth1394_host_info *hi; |
| 1236 | |
| 1237 | hi = hpsb_get_hostinfo(ð1394_highlevel, host); |
Stefan Richter | 0993987 | 2007-04-02 02:22:21 +0200 | [diff] [blame] | 1238 | if (unlikely(!hi)) { |
Stefan Richter | 5009d26 | 2007-04-02 02:15:53 +0200 | [diff] [blame] | 1239 | ETH1394_PRINT_G(KERN_ERR, "No net device at fw-host%d\n", |
| 1240 | host->id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1241 | return RCODE_ADDRESS_ERROR; |
| 1242 | } |
| 1243 | |
| 1244 | if (ether1394_data_handler(hi->dev, srcid, destid, (char*)data, len)) |
| 1245 | return RCODE_ADDRESS_ERROR; |
| 1246 | else |
| 1247 | return RCODE_COMPLETE; |
| 1248 | } |
| 1249 | |
| 1250 | static void ether1394_iso(struct hpsb_iso *iso) |
| 1251 | { |
Harvey Harrison | faf26bc | 2008-12-13 15:03:06 -0800 | [diff] [blame] | 1252 | __be32 *data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1253 | char *buf; |
| 1254 | struct eth1394_host_info *hi; |
| 1255 | struct net_device *dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1256 | unsigned int len; |
| 1257 | u32 specifier_id; |
| 1258 | u16 source_id; |
| 1259 | int i; |
| 1260 | int nready; |
| 1261 | |
| 1262 | hi = hpsb_get_hostinfo(ð1394_highlevel, iso->host); |
Stefan Richter | 0993987 | 2007-04-02 02:22:21 +0200 | [diff] [blame] | 1263 | if (unlikely(!hi)) { |
Stefan Richter | 5009d26 | 2007-04-02 02:15:53 +0200 | [diff] [blame] | 1264 | ETH1394_PRINT_G(KERN_ERR, "No net device at fw-host%d\n", |
| 1265 | iso->host->id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1266 | return; |
| 1267 | } |
| 1268 | |
| 1269 | dev = hi->dev; |
| 1270 | |
| 1271 | nready = hpsb_iso_n_ready(iso); |
| 1272 | for (i = 0; i < nready; i++) { |
| 1273 | struct hpsb_iso_packet_info *info = |
| 1274 | &iso->infos[(iso->first_packet + i) % iso->buf_packets]; |
Harvey Harrison | faf26bc | 2008-12-13 15:03:06 -0800 | [diff] [blame] | 1275 | data = (__be32 *)(iso->data_buf.kvirt + info->offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1276 | |
| 1277 | /* skip over GASP header */ |
| 1278 | buf = (char *)data + 8; |
| 1279 | len = info->len - 8; |
| 1280 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 1281 | specifier_id = (be32_to_cpu(data[0]) & 0xffff) << 8 | |
| 1282 | (be32_to_cpu(data[1]) & 0xff000000) >> 24; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1283 | source_id = be32_to_cpu(data[0]) >> 16; |
| 1284 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 1285 | if (info->channel != (iso->host->csr.broadcast_channel & 0x3f) |
| 1286 | || specifier_id != ETHER1394_GASP_SPECIFIER_ID) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1287 | /* This packet is not for us */ |
| 1288 | continue; |
| 1289 | } |
| 1290 | ether1394_data_handler(dev, source_id, LOCAL_BUS | ALL_NODES, |
| 1291 | buf, len); |
| 1292 | } |
| 1293 | |
| 1294 | hpsb_iso_recv_release_packets(iso, i); |
| 1295 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | } |
| 1297 | |
| 1298 | /****************************************** |
| 1299 | * Datagram transmission code |
| 1300 | ******************************************/ |
| 1301 | |
| 1302 | /* Convert a standard ARP packet to 1394 ARP. The first 8 bytes (the entire |
| 1303 | * arphdr) is the same format as the ip1394 header, so they overlap. The rest |
| 1304 | * needs to be munged a bit. The remainder of the arphdr is formatted based |
| 1305 | * on hwaddr len and ipaddr len. We know what they'll be, so it's easy to |
| 1306 | * judge. |
| 1307 | * |
| 1308 | * Now that the EUI is used for the hardware address all we need to do to make |
| 1309 | * this work for 1394 is to insert 2 quadlets that contain max_rec size, |
| 1310 | * speed, and unicast FIFO address information between the sender_unique_id |
| 1311 | * and the IP addresses. |
| 1312 | */ |
Stefan Richter | e00f04a | 2007-03-18 12:23:11 +0100 | [diff] [blame] | 1313 | static void ether1394_arp_to_1394arp(struct sk_buff *skb, |
| 1314 | struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1315 | { |
| 1316 | struct eth1394_priv *priv = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1317 | struct arphdr *arp = (struct arphdr *)skb->data; |
| 1318 | unsigned char *arp_ptr = (unsigned char *)(arp + 1); |
| 1319 | struct eth1394_arp *arp1394 = (struct eth1394_arp *)skb->data; |
| 1320 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1321 | arp1394->hw_addr_len = 16; |
| 1322 | arp1394->sip = *(u32*)(arp_ptr + ETH1394_ALEN); |
| 1323 | arp1394->max_rec = priv->host->csr.max_rec; |
| 1324 | arp1394->sspd = priv->host->csr.lnk_spd; |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 1325 | arp1394->fifo_hi = htons(priv->local_fifo >> 32); |
| 1326 | arp1394->fifo_lo = htonl(priv->local_fifo & ~0x0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1327 | } |
| 1328 | |
| 1329 | /* We need to encapsulate the standard header with our own. We use the |
| 1330 | * ethernet header's proto for our own. */ |
Stefan Richter | e00f04a | 2007-03-18 12:23:11 +0100 | [diff] [blame] | 1331 | static unsigned int ether1394_encapsulate_prep(unsigned int max_payload, |
| 1332 | __be16 proto, |
| 1333 | union eth1394_hdr *hdr, |
| 1334 | u16 dg_size, u16 dgl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1335 | { |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 1336 | unsigned int adj_max_payload = |
| 1337 | max_payload - hdr_type_len[ETH1394_HDR_LF_UF]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | |
| 1339 | /* Does it all fit in one packet? */ |
| 1340 | if (dg_size <= adj_max_payload) { |
| 1341 | hdr->uf.lf = ETH1394_HDR_LF_UF; |
| 1342 | hdr->uf.ether_type = proto; |
| 1343 | } else { |
| 1344 | hdr->ff.lf = ETH1394_HDR_LF_FF; |
| 1345 | hdr->ff.ether_type = proto; |
| 1346 | hdr->ff.dg_size = dg_size - 1; |
| 1347 | hdr->ff.dgl = dgl; |
| 1348 | adj_max_payload = max_payload - hdr_type_len[ETH1394_HDR_LF_FF]; |
| 1349 | } |
Julia Lawall | 68e2aa7 | 2008-08-02 17:13:09 +0200 | [diff] [blame] | 1350 | return DIV_ROUND_UP(dg_size, adj_max_payload); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1351 | } |
| 1352 | |
Stefan Richter | e00f04a | 2007-03-18 12:23:11 +0100 | [diff] [blame] | 1353 | static unsigned int ether1394_encapsulate(struct sk_buff *skb, |
| 1354 | unsigned int max_payload, |
| 1355 | union eth1394_hdr *hdr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1356 | { |
| 1357 | union eth1394_hdr *bufhdr; |
| 1358 | int ftype = hdr->common.lf; |
| 1359 | int hdrsz = hdr_type_len[ftype]; |
| 1360 | unsigned int adj_max_payload = max_payload - hdrsz; |
| 1361 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 1362 | switch (ftype) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1363 | case ETH1394_HDR_LF_UF: |
| 1364 | bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz); |
| 1365 | bufhdr->words.word1 = htons(hdr->words.word1); |
| 1366 | bufhdr->words.word2 = hdr->words.word2; |
| 1367 | break; |
| 1368 | |
| 1369 | case ETH1394_HDR_LF_FF: |
| 1370 | bufhdr = (union eth1394_hdr *)skb_push(skb, hdrsz); |
| 1371 | bufhdr->words.word1 = htons(hdr->words.word1); |
| 1372 | bufhdr->words.word2 = hdr->words.word2; |
| 1373 | bufhdr->words.word3 = htons(hdr->words.word3); |
| 1374 | bufhdr->words.word4 = 0; |
| 1375 | |
| 1376 | /* Set frag type here for future interior fragments */ |
| 1377 | hdr->common.lf = ETH1394_HDR_LF_IF; |
| 1378 | hdr->sf.fg_off = 0; |
| 1379 | break; |
| 1380 | |
| 1381 | default: |
| 1382 | hdr->sf.fg_off += adj_max_payload; |
| 1383 | bufhdr = (union eth1394_hdr *)skb_pull(skb, adj_max_payload); |
| 1384 | if (max_payload >= skb->len) |
| 1385 | hdr->common.lf = ETH1394_HDR_LF_LF; |
| 1386 | bufhdr->words.word1 = htons(hdr->words.word1); |
| 1387 | bufhdr->words.word2 = htons(hdr->words.word2); |
| 1388 | bufhdr->words.word3 = htons(hdr->words.word3); |
| 1389 | bufhdr->words.word4 = 0; |
| 1390 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | return min(max_payload, skb->len); |
| 1392 | } |
| 1393 | |
Stefan Richter | e00f04a | 2007-03-18 12:23:11 +0100 | [diff] [blame] | 1394 | static struct hpsb_packet *ether1394_alloc_common_packet(struct hpsb_host *host) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1395 | { |
| 1396 | struct hpsb_packet *p; |
| 1397 | |
| 1398 | p = hpsb_alloc_packet(0); |
| 1399 | if (p) { |
| 1400 | p->host = host; |
| 1401 | p->generation = get_hpsb_generation(host); |
| 1402 | p->type = hpsb_async; |
| 1403 | } |
| 1404 | return p; |
| 1405 | } |
| 1406 | |
Stefan Richter | e00f04a | 2007-03-18 12:23:11 +0100 | [diff] [blame] | 1407 | static int ether1394_prep_write_packet(struct hpsb_packet *p, |
| 1408 | struct hpsb_host *host, nodeid_t node, |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 1409 | u64 addr, void *data, int tx_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1410 | { |
| 1411 | p->node_id = node; |
Stefan Richter | 7a97bc0 | 2007-05-05 17:25:51 +0200 | [diff] [blame] | 1412 | |
| 1413 | if (hpsb_get_tlabel(p)) |
| 1414 | return -EAGAIN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1415 | |
| 1416 | p->tcode = TCODE_WRITEB; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1417 | p->header_size = 16; |
| 1418 | p->expect_response = 1; |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 1419 | p->header[0] = |
| 1420 | p->node_id << 16 | p->tlabel << 10 | 1 << 8 | TCODE_WRITEB << 4; |
Stefan Richter | 7a97bc0 | 2007-05-05 17:25:51 +0200 | [diff] [blame] | 1421 | p->header[1] = host->node_id << 16 | addr >> 32; |
| 1422 | p->header[2] = addr & 0xffffffff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1423 | p->header[3] = tx_len << 16; |
| 1424 | p->data_size = (tx_len + 3) & ~3; |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 1425 | p->data = data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1426 | |
| 1427 | return 0; |
| 1428 | } |
| 1429 | |
Stefan Richter | e00f04a | 2007-03-18 12:23:11 +0100 | [diff] [blame] | 1430 | static void ether1394_prep_gasp_packet(struct hpsb_packet *p, |
| 1431 | struct eth1394_priv *priv, |
| 1432 | struct sk_buff *skb, int length) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1433 | { |
| 1434 | p->header_size = 4; |
| 1435 | p->tcode = TCODE_STREAM_DATA; |
| 1436 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 1437 | p->header[0] = length << 16 | 3 << 14 | priv->broadcast_channel << 8 | |
| 1438 | TCODE_STREAM_DATA << 4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1439 | p->data_size = length; |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 1440 | p->data = (quadlet_t *)skb->data - 2; |
| 1441 | p->data[0] = cpu_to_be32(priv->host->node_id << 16 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1442 | ETHER1394_GASP_SPECIFIER_ID_HI); |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 1443 | p->data[1] = cpu_to_be32(ETHER1394_GASP_SPECIFIER_ID_LO << 24 | |
Ben Collins | 7136b80 | 2006-06-12 18:16:25 -0400 | [diff] [blame] | 1444 | ETHER1394_GASP_VERSION); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1445 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1446 | p->speed_code = priv->bc_sspd; |
Stefan Richter | 21b2c56 | 2007-04-23 21:28:47 +0200 | [diff] [blame] | 1447 | |
| 1448 | /* prevent hpsb_send_packet() from overriding our speed code */ |
| 1449 | p->node_id = LOCAL_BUS | ALL_NODES; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1450 | } |
| 1451 | |
Stefan Richter | e00f04a | 2007-03-18 12:23:11 +0100 | [diff] [blame] | 1452 | static void ether1394_free_packet(struct hpsb_packet *packet) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1453 | { |
| 1454 | if (packet->tcode != TCODE_STREAM_DATA) |
| 1455 | hpsb_free_tlabel(packet); |
| 1456 | hpsb_free_packet(packet); |
| 1457 | } |
| 1458 | |
| 1459 | static void ether1394_complete_cb(void *__ptask); |
| 1460 | |
| 1461 | static int ether1394_send_packet(struct packet_task *ptask, unsigned int tx_len) |
| 1462 | { |
| 1463 | struct eth1394_priv *priv = ptask->priv; |
| 1464 | struct hpsb_packet *packet = NULL; |
| 1465 | |
| 1466 | packet = ether1394_alloc_common_packet(priv->host); |
| 1467 | if (!packet) |
Stefan Richter | 7a97bc0 | 2007-05-05 17:25:51 +0200 | [diff] [blame] | 1468 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1469 | |
| 1470 | if (ptask->tx_type == ETH1394_GASP) { |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 1471 | int length = tx_len + 2 * sizeof(quadlet_t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1472 | |
| 1473 | ether1394_prep_gasp_packet(packet, priv, ptask->skb, length); |
| 1474 | } else if (ether1394_prep_write_packet(packet, priv->host, |
| 1475 | ptask->dest_node, |
| 1476 | ptask->addr, ptask->skb->data, |
| 1477 | tx_len)) { |
| 1478 | hpsb_free_packet(packet); |
Stefan Richter | 7a97bc0 | 2007-05-05 17:25:51 +0200 | [diff] [blame] | 1479 | return -EAGAIN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1480 | } |
| 1481 | |
| 1482 | ptask->packet = packet; |
| 1483 | hpsb_set_packet_complete_task(ptask->packet, ether1394_complete_cb, |
| 1484 | ptask); |
| 1485 | |
| 1486 | if (hpsb_send_packet(packet) < 0) { |
| 1487 | ether1394_free_packet(packet); |
Stefan Richter | 7a97bc0 | 2007-05-05 17:25:51 +0200 | [diff] [blame] | 1488 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1489 | } |
| 1490 | |
| 1491 | return 0; |
| 1492 | } |
| 1493 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1494 | /* Task function to be run when a datagram transmission is completed */ |
Stefan Richter | e00f04a | 2007-03-18 12:23:11 +0100 | [diff] [blame] | 1495 | static void ether1394_dg_complete(struct packet_task *ptask, int fail) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1496 | { |
| 1497 | struct sk_buff *skb = ptask->skb; |
Stephen Hemminger | 92dc8cc | 2009-01-06 12:56:50 +0000 | [diff] [blame] | 1498 | struct net_device *dev = skb->dev; |
| 1499 | struct eth1394_priv *priv = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1500 | unsigned long flags; |
| 1501 | |
| 1502 | /* Statistics */ |
| 1503 | spin_lock_irqsave(&priv->lock, flags); |
| 1504 | if (fail) { |
Stephen Hemminger | 92dc8cc | 2009-01-06 12:56:50 +0000 | [diff] [blame] | 1505 | dev->stats.tx_dropped++; |
| 1506 | dev->stats.tx_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1507 | } else { |
Stephen Hemminger | 92dc8cc | 2009-01-06 12:56:50 +0000 | [diff] [blame] | 1508 | dev->stats.tx_bytes += skb->len; |
| 1509 | dev->stats.tx_packets++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1510 | } |
| 1511 | spin_unlock_irqrestore(&priv->lock, flags); |
| 1512 | |
| 1513 | dev_kfree_skb_any(skb); |
| 1514 | kmem_cache_free(packet_task_cache, ptask); |
| 1515 | } |
| 1516 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1517 | /* Callback for when a packet has been sent and the status of that packet is |
| 1518 | * known */ |
| 1519 | static void ether1394_complete_cb(void *__ptask) |
| 1520 | { |
| 1521 | struct packet_task *ptask = (struct packet_task *)__ptask; |
| 1522 | struct hpsb_packet *packet = ptask->packet; |
| 1523 | int fail = 0; |
| 1524 | |
| 1525 | if (packet->tcode != TCODE_STREAM_DATA) |
| 1526 | fail = hpsb_packet_success(packet); |
| 1527 | |
| 1528 | ether1394_free_packet(packet); |
| 1529 | |
| 1530 | ptask->outstanding_pkts--; |
| 1531 | if (ptask->outstanding_pkts > 0 && !fail) { |
Stefan Richter | 7a97bc0 | 2007-05-05 17:25:51 +0200 | [diff] [blame] | 1532 | int tx_len, err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1533 | |
| 1534 | /* Add the encapsulation header to the fragment */ |
| 1535 | tx_len = ether1394_encapsulate(ptask->skb, ptask->max_payload, |
| 1536 | &ptask->hdr); |
Stefan Richter | 7a97bc0 | 2007-05-05 17:25:51 +0200 | [diff] [blame] | 1537 | err = ether1394_send_packet(ptask, tx_len); |
| 1538 | if (err) { |
| 1539 | if (err == -EAGAIN) |
| 1540 | ETH1394_PRINT_G(KERN_ERR, "Out of tlabels\n"); |
| 1541 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1542 | ether1394_dg_complete(ptask, 1); |
Stefan Richter | 7a97bc0 | 2007-05-05 17:25:51 +0200 | [diff] [blame] | 1543 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1544 | } else { |
| 1545 | ether1394_dg_complete(ptask, fail); |
| 1546 | } |
| 1547 | } |
| 1548 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1549 | /* Transmit a packet (called by kernel) */ |
Stephen Hemminger | 6fef4c0 | 2009-08-31 19:50:41 +0000 | [diff] [blame] | 1550 | static netdev_tx_t ether1394_tx(struct sk_buff *skb, |
| 1551 | struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1552 | { |
Carlos E. Ugarte | 18b4617 | 2007-06-04 11:49:19 -0400 | [diff] [blame] | 1553 | struct eth1394hdr hdr_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1554 | struct eth1394_priv *priv = netdev_priv(dev); |
Ben Collins | 02f4213 | 2006-06-12 18:15:11 -0400 | [diff] [blame] | 1555 | __be16 proto; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1556 | unsigned long flags; |
| 1557 | nodeid_t dest_node; |
| 1558 | eth1394_tx_type tx_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1559 | unsigned int tx_len; |
| 1560 | unsigned int max_payload; |
| 1561 | u16 dg_size; |
| 1562 | u16 dgl; |
| 1563 | struct packet_task *ptask; |
| 1564 | struct eth1394_node_ref *node; |
| 1565 | struct eth1394_node_info *node_info = NULL; |
| 1566 | |
Stefan Richter | 53f374e | 2007-04-02 02:23:19 +0200 | [diff] [blame] | 1567 | ptask = kmem_cache_alloc(packet_task_cache, GFP_ATOMIC); |
Stefan Richter | fdc0092 | 2007-04-02 02:24:27 +0200 | [diff] [blame] | 1568 | if (ptask == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1569 | goto fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1570 | |
| 1571 | /* XXX Ignore this for now. Noticed that when MacOSX is the IRM, |
| 1572 | * it does not set our validity bit. We need to compensate for |
| 1573 | * that somewhere else, but not in eth1394. */ |
| 1574 | #if 0 |
Stefan Richter | fdc0092 | 2007-04-02 02:24:27 +0200 | [diff] [blame] | 1575 | if ((priv->host->csr.broadcast_channel & 0xc0000000) != 0xc0000000) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1576 | goto fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1577 | #endif |
| 1578 | |
Stefan Richter | 53f374e | 2007-04-02 02:23:19 +0200 | [diff] [blame] | 1579 | skb = skb_share_check(skb, GFP_ATOMIC); |
Stefan Richter | fdc0092 | 2007-04-02 02:24:27 +0200 | [diff] [blame] | 1580 | if (!skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1581 | goto fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1582 | |
Carlos E. Ugarte | 18b4617 | 2007-06-04 11:49:19 -0400 | [diff] [blame] | 1583 | /* Get rid of the fake eth1394 header, but first make a copy. |
| 1584 | * We might need to rebuild the header on tx failure. */ |
| 1585 | memcpy(&hdr_buf, skb->data, sizeof(hdr_buf)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1586 | skb_pull(skb, ETH1394_HLEN); |
| 1587 | |
Carlos E. Ugarte | 18b4617 | 2007-06-04 11:49:19 -0400 | [diff] [blame] | 1588 | proto = hdr_buf.h_proto; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1589 | dg_size = skb->len; |
| 1590 | |
| 1591 | /* Set the transmission type for the packet. ARP packets and IP |
| 1592 | * broadcast packets are sent via GASP. */ |
Carlos E. Ugarte | 18b4617 | 2007-06-04 11:49:19 -0400 | [diff] [blame] | 1593 | if (memcmp(hdr_buf.h_dest, dev->broadcast, ETH1394_ALEN) == 0 || |
Ben Collins | 7136b80 | 2006-06-12 18:16:25 -0400 | [diff] [blame] | 1594 | proto == htons(ETH_P_ARP) || |
| 1595 | (proto == htons(ETH_P_IP) && |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 1596 | IN_MULTICAST(ntohl(ip_hdr(skb)->daddr)))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1597 | tx_type = ETH1394_GASP; |
| 1598 | dest_node = LOCAL_BUS | ALL_NODES; |
| 1599 | max_payload = priv->bc_maxpayload - ETHER1394_GASP_OVERHEAD; |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 1600 | BUG_ON(max_payload < 512 - ETHER1394_GASP_OVERHEAD); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1601 | dgl = priv->bc_dgl; |
| 1602 | if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF]) |
| 1603 | priv->bc_dgl++; |
| 1604 | } else { |
Harvey Harrison | faf26bc | 2008-12-13 15:03:06 -0800 | [diff] [blame] | 1605 | __be64 guid = get_unaligned((__be64 *)hdr_buf.h_dest); |
David S. Miller | c20e394 | 2006-10-29 16:14:55 -0800 | [diff] [blame] | 1606 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1607 | node = eth1394_find_node_guid(&priv->ip_node_list, |
David S. Miller | c20e394 | 2006-10-29 16:14:55 -0800 | [diff] [blame] | 1608 | be64_to_cpu(guid)); |
Stefan Richter | fdc0092 | 2007-04-02 02:24:27 +0200 | [diff] [blame] | 1609 | if (!node) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1610 | goto fail; |
Stefan Richter | fdc0092 | 2007-04-02 02:24:27 +0200 | [diff] [blame] | 1611 | |
Greg Kroah-Hartman | bab0305 | 2009-04-30 14:43:31 -0700 | [diff] [blame] | 1612 | node_info = dev_get_drvdata(&node->ud->device); |
Stefan Richter | fdc0092 | 2007-04-02 02:24:27 +0200 | [diff] [blame] | 1613 | if (node_info->fifo == CSR1212_INVALID_ADDR_SPACE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1614 | goto fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1615 | |
| 1616 | dest_node = node->ud->ne->nodeid; |
| 1617 | max_payload = node_info->maxpayload; |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 1618 | BUG_ON(max_payload < 512 - ETHER1394_GASP_OVERHEAD); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1619 | |
| 1620 | dgl = node_info->dgl; |
| 1621 | if (max_payload < dg_size + hdr_type_len[ETH1394_HDR_LF_UF]) |
| 1622 | node_info->dgl++; |
| 1623 | tx_type = ETH1394_WRREQ; |
| 1624 | } |
| 1625 | |
| 1626 | /* If this is an ARP packet, convert it */ |
Ben Collins | 7136b80 | 2006-06-12 18:16:25 -0400 | [diff] [blame] | 1627 | if (proto == htons(ETH_P_ARP)) |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 1628 | ether1394_arp_to_1394arp(skb, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1629 | |
| 1630 | ptask->hdr.words.word1 = 0; |
| 1631 | ptask->hdr.words.word2 = 0; |
| 1632 | ptask->hdr.words.word3 = 0; |
| 1633 | ptask->hdr.words.word4 = 0; |
| 1634 | ptask->skb = skb; |
| 1635 | ptask->priv = priv; |
| 1636 | ptask->tx_type = tx_type; |
| 1637 | |
| 1638 | if (tx_type != ETH1394_GASP) { |
| 1639 | u64 addr; |
| 1640 | |
| 1641 | spin_lock_irqsave(&priv->lock, flags); |
| 1642 | addr = node_info->fifo; |
| 1643 | spin_unlock_irqrestore(&priv->lock, flags); |
| 1644 | |
| 1645 | ptask->addr = addr; |
| 1646 | ptask->dest_node = dest_node; |
| 1647 | } |
| 1648 | |
| 1649 | ptask->tx_type = tx_type; |
| 1650 | ptask->max_payload = max_payload; |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 1651 | ptask->outstanding_pkts = ether1394_encapsulate_prep(max_payload, |
| 1652 | proto, &ptask->hdr, dg_size, dgl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1653 | |
| 1654 | /* Add the encapsulation header to the fragment */ |
| 1655 | tx_len = ether1394_encapsulate(skb, max_payload, &ptask->hdr); |
| 1656 | dev->trans_start = jiffies; |
Stefan Richter | 7a97bc0 | 2007-05-05 17:25:51 +0200 | [diff] [blame] | 1657 | if (ether1394_send_packet(ptask, tx_len)) { |
| 1658 | if (dest_node == (LOCAL_BUS | ALL_NODES)) |
| 1659 | goto fail; |
| 1660 | |
Carlos E. Ugarte | 18b4617 | 2007-06-04 11:49:19 -0400 | [diff] [blame] | 1661 | /* At this point we want to restore the packet. When we return |
| 1662 | * here with NETDEV_TX_BUSY we will get another entrance in this |
| 1663 | * routine with the same skb and we need it to look the same. |
| 1664 | * So we pull 4 more bytes, then build the header again. */ |
| 1665 | skb_pull(skb, 4); |
| 1666 | ether1394_header(skb, dev, ntohs(hdr_buf.h_proto), |
| 1667 | hdr_buf.h_dest, NULL, 0); |
| 1668 | |
Stefan Richter | 7a97bc0 | 2007-05-05 17:25:51 +0200 | [diff] [blame] | 1669 | /* Most failures of ether1394_send_packet are recoverable. */ |
| 1670 | netif_stop_queue(dev); |
| 1671 | priv->wake_node = dest_node; |
| 1672 | schedule_work(&priv->wake); |
| 1673 | kmem_cache_free(packet_task_cache, ptask); |
| 1674 | return NETDEV_TX_BUSY; |
| 1675 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1676 | |
Stefan Richter | fdc0092 | 2007-04-02 02:24:27 +0200 | [diff] [blame] | 1677 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1678 | fail: |
| 1679 | if (ptask) |
| 1680 | kmem_cache_free(packet_task_cache, ptask); |
| 1681 | |
| 1682 | if (skb != NULL) |
| 1683 | dev_kfree_skb(skb); |
| 1684 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 1685 | spin_lock_irqsave(&priv->lock, flags); |
Stephen Hemminger | 92dc8cc | 2009-01-06 12:56:50 +0000 | [diff] [blame] | 1686 | dev->stats.tx_dropped++; |
| 1687 | dev->stats.tx_errors++; |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 1688 | spin_unlock_irqrestore(&priv->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1689 | |
Stefan Richter | fdc0092 | 2007-04-02 02:24:27 +0200 | [diff] [blame] | 1690 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1691 | } |
| 1692 | |
Akinobu Mita | 809e905 | 2007-04-21 18:36:26 +0900 | [diff] [blame] | 1693 | static int __init ether1394_init_module(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1694 | { |
Akinobu Mita | 809e905 | 2007-04-21 18:36:26 +0900 | [diff] [blame] | 1695 | int err; |
| 1696 | |
Stefan Richter | efbeccf | 2007-04-02 02:12:32 +0200 | [diff] [blame] | 1697 | packet_task_cache = kmem_cache_create("packet_task", |
| 1698 | sizeof(struct packet_task), |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1699 | 0, 0, NULL); |
Akinobu Mita | 809e905 | 2007-04-21 18:36:26 +0900 | [diff] [blame] | 1700 | if (!packet_task_cache) |
| 1701 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1702 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1703 | hpsb_register_highlevel(ð1394_highlevel); |
Akinobu Mita | 809e905 | 2007-04-21 18:36:26 +0900 | [diff] [blame] | 1704 | err = hpsb_register_protocol(ð1394_proto_driver); |
| 1705 | if (err) { |
| 1706 | hpsb_unregister_highlevel(ð1394_highlevel); |
| 1707 | kmem_cache_destroy(packet_task_cache); |
| 1708 | } |
| 1709 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1710 | } |
| 1711 | |
Akinobu Mita | 809e905 | 2007-04-21 18:36:26 +0900 | [diff] [blame] | 1712 | static void __exit ether1394_exit_module(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1713 | { |
| 1714 | hpsb_unregister_protocol(ð1394_proto_driver); |
| 1715 | hpsb_unregister_highlevel(ð1394_highlevel); |
| 1716 | kmem_cache_destroy(packet_task_cache); |
| 1717 | } |
| 1718 | |
| 1719 | module_init(ether1394_init_module); |
| 1720 | module_exit(ether1394_exit_module); |