blob: f4ea80d602f73bd6bc5adac2a32bbbe2b58de716 [file] [log] [blame]
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001/*
2 * IPv4 over IEEE 1394, per RFC 2734
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00003 * IPv6 over IEEE 1394, per RFC 3146
Jay Fenlasonc76acec2009-05-18 13:08:06 -04004 *
5 * Copyright (C) 2009 Jay Fenlason <fenlason@redhat.com>
6 *
7 * based on eth1394 by Ben Collins et al
8 */
9
Stefan Richterf91e3bd2009-06-07 22:57:53 +020010#include <linux/bug.h>
August Lilleaasbf337b12011-05-29 19:07:19 +020011#include <linux/compiler.h>
Stefan Richter48553012010-11-06 23:18:23 +010012#include <linux/delay.h>
Jay Fenlasonc76acec2009-05-18 13:08:06 -040013#include <linux/device.h>
Stefan Richterc1671472010-12-17 22:22:33 +010014#include <linux/ethtool.h>
Jay Fenlasonc76acec2009-05-18 13:08:06 -040015#include <linux/firewire.h>
16#include <linux/firewire-constants.h>
17#include <linux/highmem.h>
18#include <linux/in.h>
19#include <linux/ip.h>
Stefan Richterf91e3bd2009-06-07 22:57:53 +020020#include <linux/jiffies.h>
Jay Fenlasonc76acec2009-05-18 13:08:06 -040021#include <linux/mod_devicetable.h>
22#include <linux/module.h>
23#include <linux/moduleparam.h>
Stefan Richter5a124d32009-06-14 11:45:27 +020024#include <linux/mutex.h>
Jay Fenlasonc76acec2009-05-18 13:08:06 -040025#include <linux/netdevice.h>
26#include <linux/skbuff.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090027#include <linux/slab.h>
Stefan Richter5a124d32009-06-14 11:45:27 +020028#include <linux/spinlock.h>
Jay Fenlasonc76acec2009-05-18 13:08:06 -040029
30#include <asm/unaligned.h>
31#include <net/arp.h>
YOSHIFUJI Hideaki / 吉藤英明6752c8d2013-03-25 08:26:16 +000032#include <net/firewire.h>
Jay Fenlasonc76acec2009-05-18 13:08:06 -040033
Stefan Richterb2268832010-11-14 14:35:40 +010034/* rx limits */
35#define FWNET_MAX_FRAGMENTS 30 /* arbitrary, > TX queue depth */
36#define FWNET_ISO_PAGE_COUNT (PAGE_SIZE < 16*1024 ? 4 : 2)
37
38/* tx limits */
39#define FWNET_MAX_QUEUED_DATAGRAMS 20 /* < 64 = number of tlabels */
40#define FWNET_MIN_QUEUED_DATAGRAMS 10 /* should keep AT DMA busy enough */
41#define FWNET_TX_QUEUE_LEN FWNET_MAX_QUEUED_DATAGRAMS /* ? */
Jay Fenlasonc76acec2009-05-18 13:08:06 -040042
Stefan Richterf91e3bd2009-06-07 22:57:53 +020043#define IEEE1394_BROADCAST_CHANNEL 31
44#define IEEE1394_ALL_NODES (0xffc0 | 0x003f)
45#define IEEE1394_MAX_PAYLOAD_S100 512
46#define FWNET_NO_FIFO_ADDR (~0ULL)
Jay Fenlasonc76acec2009-05-18 13:08:06 -040047
Stefan Richterf91e3bd2009-06-07 22:57:53 +020048#define IANA_SPECIFIER_ID 0x00005eU
49#define RFC2734_SW_VERSION 0x000001U
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +000050#define RFC3146_SW_VERSION 0x000002U
Jay Fenlasonc76acec2009-05-18 13:08:06 -040051
Stefan Richterf91e3bd2009-06-07 22:57:53 +020052#define IEEE1394_GASP_HDR_SIZE 8
Jay Fenlasonc76acec2009-05-18 13:08:06 -040053
Stefan Richterf91e3bd2009-06-07 22:57:53 +020054#define RFC2374_UNFRAG_HDR_SIZE 4
55#define RFC2374_FRAG_HDR_SIZE 8
56#define RFC2374_FRAG_OVERHEAD 4
Jay Fenlasonc76acec2009-05-18 13:08:06 -040057
Stefan Richterf91e3bd2009-06-07 22:57:53 +020058#define RFC2374_HDR_UNFRAG 0 /* unfragmented */
59#define RFC2374_HDR_FIRSTFRAG 1 /* first fragment */
60#define RFC2374_HDR_LASTFRAG 2 /* last fragment */
61#define RFC2374_HDR_INTFRAG 3 /* interior fragment */
Jay Fenlasonc76acec2009-05-18 13:08:06 -040062
YOSHIFUJI Hideaki / 吉藤英明021b97e2013-03-25 08:25:48 +000063static bool fwnet_hwaddr_is_multicast(u8 *ha)
64{
65 return !!(*ha & 1);
66}
67
Stefan Richterf91e3bd2009-06-07 22:57:53 +020068/* IPv4 and IPv6 encapsulation header */
69struct rfc2734_header {
Jay Fenlasonc76acec2009-05-18 13:08:06 -040070 u32 w0;
71 u32 w1;
72};
73
Stefan Richterf91e3bd2009-06-07 22:57:53 +020074#define fwnet_get_hdr_lf(h) (((h)->w0 & 0xc0000000) >> 30)
75#define fwnet_get_hdr_ether_type(h) (((h)->w0 & 0x0000ffff))
76#define fwnet_get_hdr_dg_size(h) (((h)->w0 & 0x0fff0000) >> 16)
77#define fwnet_get_hdr_fg_off(h) (((h)->w0 & 0x00000fff))
78#define fwnet_get_hdr_dgl(h) (((h)->w1 & 0xffff0000) >> 16)
79
80#define fwnet_set_hdr_lf(lf) ((lf) << 30)
81#define fwnet_set_hdr_ether_type(et) (et)
82#define fwnet_set_hdr_dg_size(dgs) ((dgs) << 16)
83#define fwnet_set_hdr_fg_off(fgo) (fgo)
84
85#define fwnet_set_hdr_dgl(dgl) ((dgl) << 16)
86
87static inline void fwnet_make_uf_hdr(struct rfc2734_header *hdr,
88 unsigned ether_type)
89{
90 hdr->w0 = fwnet_set_hdr_lf(RFC2374_HDR_UNFRAG)
91 | fwnet_set_hdr_ether_type(ether_type);
Jay Fenlasonc76acec2009-05-18 13:08:06 -040092}
93
Stefan Richterf91e3bd2009-06-07 22:57:53 +020094static inline void fwnet_make_ff_hdr(struct rfc2734_header *hdr,
95 unsigned ether_type, unsigned dg_size, unsigned dgl)
96{
97 hdr->w0 = fwnet_set_hdr_lf(RFC2374_HDR_FIRSTFRAG)
98 | fwnet_set_hdr_dg_size(dg_size)
99 | fwnet_set_hdr_ether_type(ether_type);
100 hdr->w1 = fwnet_set_hdr_dgl(dgl);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400101}
102
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200103static inline void fwnet_make_sf_hdr(struct rfc2734_header *hdr,
104 unsigned lf, unsigned dg_size, unsigned fg_off, unsigned dgl)
105{
106 hdr->w0 = fwnet_set_hdr_lf(lf)
107 | fwnet_set_hdr_dg_size(dg_size)
108 | fwnet_set_hdr_fg_off(fg_off);
109 hdr->w1 = fwnet_set_hdr_dgl(dgl);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400110}
111
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400112/* This list keeps track of what parts of the datagram have been filled in */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200113struct fwnet_fragment_info {
114 struct list_head fi_link;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400115 u16 offset;
116 u16 len;
117};
118
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200119struct fwnet_partial_datagram {
120 struct list_head pd_link;
121 struct list_head fi_list;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400122 struct sk_buff *skb;
123 /* FIXME Why not use skb->data? */
124 char *pbuf;
125 u16 datagram_label;
126 u16 ether_type;
127 u16 datagram_size;
128};
129
Stefan Richter5a124d32009-06-14 11:45:27 +0200130static DEFINE_MUTEX(fwnet_device_mutex);
131static LIST_HEAD(fwnet_device_list);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400132
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200133struct fwnet_device {
Stefan Richter5a124d32009-06-14 11:45:27 +0200134 struct list_head dev_link;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400135 spinlock_t lock;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200136 enum {
137 FWNET_BROADCAST_ERROR,
138 FWNET_BROADCAST_RUNNING,
139 FWNET_BROADCAST_STOPPED,
140 } broadcast_state;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400141 struct fw_iso_context *broadcast_rcv_context;
142 struct fw_iso_buffer broadcast_rcv_buffer;
143 void **broadcast_rcv_buffer_ptrs;
144 unsigned broadcast_rcv_next_ptr;
145 unsigned num_broadcast_rcv_ptrs;
146 unsigned rcv_buffer_size;
147 /*
148 * This value is the maximum unfragmented datagram size that can be
149 * sent by the hardware. It already has the GASP overhead and the
150 * unfragmented datagram header overhead calculated into it.
151 */
152 unsigned broadcast_xmt_max_payload;
153 u16 broadcast_xmt_datagramlabel;
154
155 /*
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200156 * The CSR address that remote nodes must send datagrams to for us to
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400157 * receive them.
158 */
159 struct fw_address_handler handler;
160 u64 local_fifo;
161
Stefan Richter48553012010-11-06 23:18:23 +0100162 /* Number of tx datagrams that have been queued but not yet acked */
163 int queued_datagrams;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400164
Stefan Richterc1671472010-12-17 22:22:33 +0100165 int peer_count;
Stefan Richter5a124d32009-06-14 11:45:27 +0200166 struct list_head peer_list;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400167 struct fw_card *card;
Stefan Richter5a124d32009-06-14 11:45:27 +0200168 struct net_device *netdev;
169};
170
171struct fwnet_peer {
172 struct list_head peer_link;
173 struct fwnet_device *dev;
174 u64 guid;
Stefan Richter5a124d32009-06-14 11:45:27 +0200175
176 /* guarded by dev->lock */
177 struct list_head pd_list; /* received partial datagrams */
178 unsigned pdg_size; /* pd_list size */
179
180 u16 datagram_label; /* outgoing datagram label */
Stefan Richter48553012010-11-06 23:18:23 +0100181 u16 max_payload; /* includes RFC2374_FRAG_HDR_SIZE overhead */
Stefan Richter5a124d32009-06-14 11:45:27 +0200182 int node_id;
183 int generation;
184 unsigned speed;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400185};
186
187/* This is our task struct. It's used for the packet complete callback. */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200188struct fwnet_packet_task {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400189 struct fw_transaction transaction;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200190 struct rfc2734_header hdr;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400191 struct sk_buff *skb;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200192 struct fwnet_device *dev;
193
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400194 int outstanding_pkts;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400195 u64 fifo_addr;
196 u16 dest_node;
Stefan Richter48553012010-11-06 23:18:23 +0100197 u16 max_payload;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400198 u8 generation;
199 u8 speed;
Stefan Richter48553012010-11-06 23:18:23 +0100200 u8 enqueued;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400201};
202
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200203/*
YOSHIFUJI Hideaki / 吉藤英明6752c8d2013-03-25 08:26:16 +0000204 * Get fifo address embedded in hwaddr
205 */
206static __u64 fwnet_hwaddr_fifo(union fwnet_hwaddr *ha)
207{
208 return (u64)get_unaligned_be16(&ha->uc.fifo_hi) << 32
209 | get_unaligned_be32(&ha->uc.fifo_lo);
210}
211
212/*
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200213 * saddr == NULL means use device source address.
214 * daddr == NULL means leave destination address (eg unresolved arp).
215 */
216static int fwnet_header_create(struct sk_buff *skb, struct net_device *net,
217 unsigned short type, const void *daddr,
218 const void *saddr, unsigned len)
219{
220 struct fwnet_header *h;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400221
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200222 h = (struct fwnet_header *)skb_push(skb, sizeof(*h));
223 put_unaligned_be16(type, &h->h_proto);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400224
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200225 if (net->flags & (IFF_LOOPBACK | IFF_NOARP)) {
226 memset(h->h_dest, 0, net->addr_len);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400227
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200228 return net->hard_header_len;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400229 }
230
231 if (daddr) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200232 memcpy(h->h_dest, daddr, net->addr_len);
233
234 return net->hard_header_len;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400235 }
236
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200237 return -net->hard_header_len;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400238}
239
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200240static int fwnet_header_cache(const struct neighbour *neigh,
David S. Millere69dd332011-07-12 23:28:12 -0700241 struct hh_cache *hh, __be16 type)
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200242{
243 struct net_device *net;
244 struct fwnet_header *h;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400245
David S. Millere69dd332011-07-12 23:28:12 -0700246 if (type == cpu_to_be16(ETH_P_802_3))
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400247 return -1;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200248 net = neigh->dev;
YOSHIFUJI Hideaki / 吉藤英明82586342013-01-19 22:03:07 +0000249 h = (struct fwnet_header *)((u8 *)hh->hh_data + HH_DATA_OFF(sizeof(*h)));
David S. Millere69dd332011-07-12 23:28:12 -0700250 h->h_proto = type;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200251 memcpy(h->h_dest, neigh->ha, net->addr_len);
252 hh->hh_len = FWNET_HLEN;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400253
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400254 return 0;
255}
256
257/* Called by Address Resolution module to notify changes in address. */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200258static void fwnet_header_cache_update(struct hh_cache *hh,
259 const struct net_device *net, const unsigned char *haddr)
260{
YOSHIFUJI Hideaki / 吉藤英明82586342013-01-19 22:03:07 +0000261 memcpy((u8 *)hh->hh_data + HH_DATA_OFF(FWNET_HLEN), haddr, net->addr_len);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400262}
263
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200264static int fwnet_header_parse(const struct sk_buff *skb, unsigned char *haddr)
265{
266 memcpy(haddr, skb->dev->dev_addr, FWNET_ALEN);
267
268 return FWNET_ALEN;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400269}
270
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200271static const struct header_ops fwnet_header_ops = {
272 .create = fwnet_header_create,
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200273 .cache = fwnet_header_cache,
274 .cache_update = fwnet_header_cache_update,
275 .parse = fwnet_header_parse,
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400276};
277
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400278/* FIXME: is this correct for all cases? */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200279static bool fwnet_frag_overlap(struct fwnet_partial_datagram *pd,
280 unsigned offset, unsigned len)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400281{
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200282 struct fwnet_fragment_info *fi;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400283 unsigned end = offset + len;
284
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200285 list_for_each_entry(fi, &pd->fi_list, fi_link)
286 if (offset < fi->offset + fi->len && end > fi->offset)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400287 return true;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200288
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400289 return false;
290}
291
292/* Assumes that new fragment does not overlap any existing fragments */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200293static struct fwnet_fragment_info *fwnet_frag_new(
294 struct fwnet_partial_datagram *pd, unsigned offset, unsigned len)
295{
296 struct fwnet_fragment_info *fi, *fi2, *new;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400297 struct list_head *list;
298
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200299 list = &pd->fi_list;
300 list_for_each_entry(fi, &pd->fi_list, fi_link) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400301 if (fi->offset + fi->len == offset) {
302 /* The new fragment can be tacked on to the end */
303 /* Did the new fragment plug a hole? */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200304 fi2 = list_entry(fi->fi_link.next,
305 struct fwnet_fragment_info, fi_link);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400306 if (fi->offset + fi->len == fi2->offset) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400307 /* glue fragments together */
308 fi->len += len + fi2->len;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200309 list_del(&fi2->fi_link);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400310 kfree(fi2);
311 } else {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400312 fi->len += len;
313 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200314
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400315 return fi;
316 }
317 if (offset + len == fi->offset) {
318 /* The new fragment can be tacked on to the beginning */
319 /* Did the new fragment plug a hole? */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200320 fi2 = list_entry(fi->fi_link.prev,
321 struct fwnet_fragment_info, fi_link);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400322 if (fi2->offset + fi2->len == fi->offset) {
323 /* glue fragments together */
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400324 fi2->len += fi->len + len;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200325 list_del(&fi->fi_link);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400326 kfree(fi);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200327
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400328 return fi2;
329 }
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400330 fi->offset = offset;
331 fi->len += len;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200332
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400333 return fi;
334 }
335 if (offset > fi->offset + fi->len) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200336 list = &fi->fi_link;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400337 break;
338 }
339 if (offset + len < fi->offset) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200340 list = fi->fi_link.prev;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400341 break;
342 }
343 }
344
345 new = kmalloc(sizeof(*new), GFP_ATOMIC);
Stefan Richtercfb0c9d2013-03-24 17:32:00 +0100346 if (!new)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400347 return NULL;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400348
349 new->offset = offset;
350 new->len = len;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200351 list_add(&new->fi_link, list);
352
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400353 return new;
354}
355
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200356static struct fwnet_partial_datagram *fwnet_pd_new(struct net_device *net,
357 struct fwnet_peer *peer, u16 datagram_label, unsigned dg_size,
358 void *frag_buf, unsigned frag_off, unsigned frag_len)
359{
360 struct fwnet_partial_datagram *new;
361 struct fwnet_fragment_info *fi;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400362
363 new = kmalloc(sizeof(*new), GFP_ATOMIC);
364 if (!new)
365 goto fail;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200366
367 INIT_LIST_HEAD(&new->fi_list);
368 fi = fwnet_frag_new(new, frag_off, frag_len);
369 if (fi == NULL)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400370 goto fail_w_new;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200371
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400372 new->datagram_label = datagram_label;
373 new->datagram_size = dg_size;
YOSHIFUJI Hideaki / 吉藤英明82586342013-01-19 22:03:07 +0000374 new->skb = dev_alloc_skb(dg_size + LL_RESERVED_SPACE(net));
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200375 if (new->skb == NULL)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400376 goto fail_w_fi;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200377
YOSHIFUJI Hideaki / 吉藤英明82586342013-01-19 22:03:07 +0000378 skb_reserve(new->skb, LL_RESERVED_SPACE(net));
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400379 new->pbuf = skb_put(new->skb, dg_size);
380 memcpy(new->pbuf + frag_off, frag_buf, frag_len);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200381 list_add_tail(&new->pd_link, &peer->pd_list);
382
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400383 return new;
384
385fail_w_fi:
386 kfree(fi);
387fail_w_new:
388 kfree(new);
389fail:
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400390 return NULL;
391}
392
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200393static struct fwnet_partial_datagram *fwnet_pd_find(struct fwnet_peer *peer,
394 u16 datagram_label)
395{
396 struct fwnet_partial_datagram *pd;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400397
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200398 list_for_each_entry(pd, &peer->pd_list, pd_link)
399 if (pd->datagram_label == datagram_label)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400400 return pd;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200401
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400402 return NULL;
403}
404
405
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200406static void fwnet_pd_delete(struct fwnet_partial_datagram *old)
407{
408 struct fwnet_fragment_info *fi, *n;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400409
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200410 list_for_each_entry_safe(fi, n, &old->fi_list, fi_link)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400411 kfree(fi);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200412
413 list_del(&old->pd_link);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400414 dev_kfree_skb_any(old->skb);
415 kfree(old);
416}
417
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200418static bool fwnet_pd_update(struct fwnet_peer *peer,
419 struct fwnet_partial_datagram *pd, void *frag_buf,
420 unsigned frag_off, unsigned frag_len)
421{
422 if (fwnet_frag_new(pd, frag_off, frag_len) == NULL)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400423 return false;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200424
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400425 memcpy(pd->pbuf + frag_off, frag_buf, frag_len);
426
427 /*
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300428 * Move list entry to beginning of list so that oldest partial
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400429 * datagrams percolate to the end of the list
430 */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200431 list_move_tail(&pd->pd_link, &peer->pd_list);
432
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400433 return true;
434}
435
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200436static bool fwnet_pd_is_complete(struct fwnet_partial_datagram *pd)
437{
438 struct fwnet_fragment_info *fi;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400439
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200440 fi = list_entry(pd->fi_list.next, struct fwnet_fragment_info, fi_link);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400441
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200442 return fi->len == pd->datagram_size;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400443}
444
Stefan Richter5a124d32009-06-14 11:45:27 +0200445/* caller must hold dev->lock */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200446static struct fwnet_peer *fwnet_peer_find_by_guid(struct fwnet_device *dev,
447 u64 guid)
448{
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200449 struct fwnet_peer *peer;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400450
Stefan Richter5a124d32009-06-14 11:45:27 +0200451 list_for_each_entry(peer, &dev->peer_list, peer_link)
452 if (peer->guid == guid)
453 return peer;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200454
Stefan Richter5a124d32009-06-14 11:45:27 +0200455 return NULL;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400456}
457
Stefan Richter5a124d32009-06-14 11:45:27 +0200458/* caller must hold dev->lock */
459static struct fwnet_peer *fwnet_peer_find_by_node_id(struct fwnet_device *dev,
460 int node_id, int generation)
461{
462 struct fwnet_peer *peer;
463
464 list_for_each_entry(peer, &dev->peer_list, peer_link)
465 if (peer->node_id == node_id &&
466 peer->generation == generation)
467 return peer;
468
469 return NULL;
470}
471
472/* See IEEE 1394-2008 table 6-4, table 8-8, table 16-18. */
473static unsigned fwnet_max_payload(unsigned max_rec, unsigned speed)
474{
475 max_rec = min(max_rec, speed + 8);
Stefan Richter4ec4a672011-09-19 00:20:48 +0200476 max_rec = clamp(max_rec, 8U, 11U); /* 512...4096 */
Stefan Richter5a124d32009-06-14 11:45:27 +0200477
478 return (1 << (max_rec + 1)) - RFC2374_FRAG_HDR_SIZE;
479}
480
481
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200482static int fwnet_finish_incoming_packet(struct net_device *net,
483 struct sk_buff *skb, u16 source_node_id,
484 bool is_broadcast, u16 ether_type)
485{
486 struct fwnet_device *dev;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400487 int status;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200488 __be64 guid;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400489
YOSHIFUJI Hideaki / 吉藤英明18406d72013-03-25 08:25:38 +0000490 switch (ether_type) {
491 case ETH_P_ARP:
492 case ETH_P_IP:
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +0000493#if IS_ENABLED(CONFIG_IPV6)
494 case ETH_P_IPV6:
495#endif
YOSHIFUJI Hideaki / 吉藤英明18406d72013-03-25 08:25:38 +0000496 break;
497 default:
498 goto err;
499 }
500
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200501 dev = netdev_priv(net);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400502 /* Write metadata, and then pass to the receive level */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200503 skb->dev = net;
YOSHIFUJI Hideaki / 吉藤英明b577d7e2013-01-19 21:43:40 +0000504 skb->ip_summed = CHECKSUM_NONE;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400505
506 /*
507 * Parse the encapsulation header. This actually does the job of
YOSHIFUJI Hideaki / 吉藤英明6752c8d2013-03-25 08:26:16 +0000508 * converting to an ethernet-like pseudo frame header.
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400509 */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200510 guid = cpu_to_be64(dev->card->guid);
511 if (dev_hard_header(skb, net, ether_type,
YOSHIFUJI Hideaki / 吉藤英明6752c8d2013-03-25 08:26:16 +0000512 is_broadcast ? net->broadcast : net->dev_addr,
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200513 NULL, skb->len) >= 0) {
514 struct fwnet_header *eth;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400515 u16 *rawp;
516 __be16 protocol;
517
518 skb_reset_mac_header(skb);
519 skb_pull(skb, sizeof(*eth));
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200520 eth = (struct fwnet_header *)skb_mac_header(skb);
YOSHIFUJI Hideaki / 吉藤英明021b97e2013-03-25 08:25:48 +0000521 if (fwnet_hwaddr_is_multicast(eth->h_dest)) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200522 if (memcmp(eth->h_dest, net->broadcast,
523 net->addr_len) == 0)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400524 skb->pkt_type = PACKET_BROADCAST;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400525#if 0
526 else
527 skb->pkt_type = PACKET_MULTICAST;
528#endif
529 } else {
Stefan Richter156ce862009-06-14 11:46:57 +0200530 if (memcmp(eth->h_dest, net->dev_addr, net->addr_len))
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400531 skb->pkt_type = PACKET_OTHERHOST;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400532 }
Simon Hormane5c5d222013-03-28 13:38:25 +0900533 if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400534 protocol = eth->h_proto;
535 } else {
536 rawp = (u16 *)skb->data;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200537 if (*rawp == 0xffff)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400538 protocol = htons(ETH_P_802_3);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200539 else
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400540 protocol = htons(ETH_P_802_2);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400541 }
542 skb->protocol = protocol;
543 }
544 status = netif_rx(skb);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200545 if (status == NET_RX_DROP) {
546 net->stats.rx_errors++;
547 net->stats.rx_dropped++;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400548 } else {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200549 net->stats.rx_packets++;
550 net->stats.rx_bytes += skb->len;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400551 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200552
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400553 return 0;
554
YOSHIFUJI Hideaki / 吉藤英明18406d72013-03-25 08:25:38 +0000555 err:
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200556 net->stats.rx_errors++;
557 net->stats.rx_dropped++;
558
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400559 dev_kfree_skb_any(skb);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200560
Stefan Richter1bf145f2010-08-16 23:45:54 +0200561 return -ENOENT;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400562}
563
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200564static int fwnet_incoming_packet(struct fwnet_device *dev, __be32 *buf, int len,
Stefan Richter5a124d32009-06-14 11:45:27 +0200565 int source_node_id, int generation,
566 bool is_broadcast)
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200567{
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400568 struct sk_buff *skb;
Stefan Richter5a124d32009-06-14 11:45:27 +0200569 struct net_device *net = dev->netdev;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200570 struct rfc2734_header hdr;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400571 unsigned lf;
572 unsigned long flags;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200573 struct fwnet_peer *peer;
574 struct fwnet_partial_datagram *pd;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400575 int fg_off;
576 int dg_size;
577 u16 datagram_label;
578 int retval;
579 u16 ether_type;
580
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200581 hdr.w0 = be32_to_cpu(buf[0]);
582 lf = fwnet_get_hdr_lf(&hdr);
583 if (lf == RFC2374_HDR_UNFRAG) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400584 /*
585 * An unfragmented datagram has been received by the ieee1394
586 * bus. Build an skbuff around it so we can pass it to the
587 * high level network layer.
588 */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200589 ether_type = fwnet_get_hdr_ether_type(&hdr);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400590 buf++;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200591 len -= RFC2374_UNFRAG_HDR_SIZE;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400592
YOSHIFUJI Hideaki / 吉藤英明82586342013-01-19 22:03:07 +0000593 skb = dev_alloc_skb(len + LL_RESERVED_SPACE(net));
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400594 if (unlikely(!skb)) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200595 net->stats.rx_dropped++;
596
Stefan Richter1bf145f2010-08-16 23:45:54 +0200597 return -ENOMEM;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400598 }
YOSHIFUJI Hideaki / 吉藤英明82586342013-01-19 22:03:07 +0000599 skb_reserve(skb, LL_RESERVED_SPACE(net));
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200600 memcpy(skb_put(skb, len), buf, len);
601
602 return fwnet_finish_incoming_packet(net, skb, source_node_id,
603 is_broadcast, ether_type);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400604 }
605 /* A datagram fragment has been received, now the fun begins. */
606 hdr.w1 = ntohl(buf[1]);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200607 buf += 2;
608 len -= RFC2374_FRAG_HDR_SIZE;
609 if (lf == RFC2374_HDR_FIRSTFRAG) {
610 ether_type = fwnet_get_hdr_ether_type(&hdr);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400611 fg_off = 0;
612 } else {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200613 ether_type = 0;
614 fg_off = fwnet_get_hdr_fg_off(&hdr);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400615 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200616 datagram_label = fwnet_get_hdr_dgl(&hdr);
617 dg_size = fwnet_get_hdr_dg_size(&hdr); /* ??? + 1 */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200618
Stefan Richter5a124d32009-06-14 11:45:27 +0200619 spin_lock_irqsave(&dev->lock, flags);
620
621 peer = fwnet_peer_find_by_node_id(dev, source_node_id, generation);
Stefan Richter1bf145f2010-08-16 23:45:54 +0200622 if (!peer) {
623 retval = -ENOENT;
624 goto fail;
625 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200626
627 pd = fwnet_pd_find(peer, datagram_label);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400628 if (pd == NULL) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200629 while (peer->pdg_size >= FWNET_MAX_FRAGMENTS) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400630 /* remove the oldest */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200631 fwnet_pd_delete(list_first_entry(&peer->pd_list,
632 struct fwnet_partial_datagram, pd_link));
633 peer->pdg_size--;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400634 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200635 pd = fwnet_pd_new(net, peer, datagram_label,
636 dg_size, buf, fg_off, len);
637 if (pd == NULL) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400638 retval = -ENOMEM;
Stefan Richter1bf145f2010-08-16 23:45:54 +0200639 goto fail;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400640 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200641 peer->pdg_size++;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400642 } else {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200643 if (fwnet_frag_overlap(pd, fg_off, len) ||
644 pd->datagram_size != dg_size) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400645 /*
646 * Differing datagram sizes or overlapping fragments,
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200647 * discard old datagram and start a new one.
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400648 */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200649 fwnet_pd_delete(pd);
650 pd = fwnet_pd_new(net, peer, datagram_label,
651 dg_size, buf, fg_off, len);
652 if (pd == NULL) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200653 peer->pdg_size--;
Stefan Richter1bf145f2010-08-16 23:45:54 +0200654 retval = -ENOMEM;
655 goto fail;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400656 }
657 } else {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200658 if (!fwnet_pd_update(peer, pd, buf, fg_off, len)) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400659 /*
660 * Couldn't save off fragment anyway
661 * so might as well obliterate the
662 * datagram now.
663 */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200664 fwnet_pd_delete(pd);
665 peer->pdg_size--;
Stefan Richter1bf145f2010-08-16 23:45:54 +0200666 retval = -ENOMEM;
667 goto fail;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400668 }
669 }
670 } /* new datagram or add to existing one */
671
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200672 if (lf == RFC2374_HDR_FIRSTFRAG)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400673 pd->ether_type = ether_type;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200674
675 if (fwnet_pd_is_complete(pd)) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400676 ether_type = pd->ether_type;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200677 peer->pdg_size--;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400678 skb = skb_get(pd->skb);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200679 fwnet_pd_delete(pd);
680
Stefan Richter5a124d32009-06-14 11:45:27 +0200681 spin_unlock_irqrestore(&dev->lock, flags);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200682
683 return fwnet_finish_incoming_packet(net, skb, source_node_id,
684 false, ether_type);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400685 }
686 /*
687 * Datagram is not complete, we're done for the
688 * moment.
689 */
Stefan Richterb2268832010-11-14 14:35:40 +0100690 retval = 0;
Stefan Richter1bf145f2010-08-16 23:45:54 +0200691 fail:
Stefan Richter5a124d32009-06-14 11:45:27 +0200692 spin_unlock_irqrestore(&dev->lock, flags);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200693
Stefan Richter1bf145f2010-08-16 23:45:54 +0200694 return retval;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400695}
696
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200697static void fwnet_receive_packet(struct fw_card *card, struct fw_request *r,
698 int tcode, int destination, int source, int generation,
Stefan Richter33e553f2010-06-20 22:50:35 +0200699 unsigned long long offset, void *payload, size_t length,
700 void *callback_data)
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200701{
Stefan Richter00635b82009-06-16 22:35:32 +0200702 struct fwnet_device *dev = callback_data;
703 int rcode;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400704
Stefan Richter00635b82009-06-16 22:35:32 +0200705 if (destination == IEEE1394_ALL_NODES) {
706 kfree(r);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200707
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400708 return;
709 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200710
Stefan Richter00635b82009-06-16 22:35:32 +0200711 if (offset != dev->handler.offset)
712 rcode = RCODE_ADDRESS_ERROR;
713 else if (tcode != TCODE_WRITE_BLOCK_REQUEST)
714 rcode = RCODE_TYPE_ERROR;
715 else if (fwnet_incoming_packet(dev, payload, length,
716 source, generation, false) != 0) {
Stefan Richter8408dc12012-02-19 12:48:36 +0100717 dev_err(&dev->netdev->dev, "incoming packet failure\n");
Stefan Richter00635b82009-06-16 22:35:32 +0200718 rcode = RCODE_CONFLICT_ERROR;
719 } else
720 rcode = RCODE_COMPLETE;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200721
Stefan Richter00635b82009-06-16 22:35:32 +0200722 fw_send_response(card, r, rcode);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400723}
724
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200725static void fwnet_receive_broadcast(struct fw_iso_context *context,
726 u32 cycle, size_t header_length, void *header, void *data)
727{
728 struct fwnet_device *dev;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400729 struct fw_iso_packet packet;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200730 __be16 *hdr_ptr;
731 __be32 *buf_ptr;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400732 int retval;
733 u32 length;
734 u16 source_node_id;
735 u32 specifier_id;
736 u32 ver;
737 unsigned long offset;
738 unsigned long flags;
739
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200740 dev = data;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400741 hdr_ptr = header;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200742 length = be16_to_cpup(hdr_ptr);
743
744 spin_lock_irqsave(&dev->lock, flags);
745
746 offset = dev->rcv_buffer_size * dev->broadcast_rcv_next_ptr;
747 buf_ptr = dev->broadcast_rcv_buffer_ptrs[dev->broadcast_rcv_next_ptr++];
748 if (dev->broadcast_rcv_next_ptr == dev->num_broadcast_rcv_ptrs)
749 dev->broadcast_rcv_next_ptr = 0;
750
751 spin_unlock_irqrestore(&dev->lock, flags);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400752
753 specifier_id = (be32_to_cpu(buf_ptr[0]) & 0xffff) << 8
754 | (be32_to_cpu(buf_ptr[1]) & 0xff000000) >> 24;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200755 ver = be32_to_cpu(buf_ptr[1]) & 0xffffff;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400756 source_node_id = be32_to_cpu(buf_ptr[0]) >> 16;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200757
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +0000758 if (specifier_id == IANA_SPECIFIER_ID &&
759 (ver == RFC2734_SW_VERSION
760#if IS_ENABLED(CONFIG_IPV6)
761 || ver == RFC3146_SW_VERSION
762#endif
763 )) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400764 buf_ptr += 2;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200765 length -= IEEE1394_GASP_HDR_SIZE;
Stephan Gatzka9d237342012-11-28 20:04:32 +0100766 fwnet_incoming_packet(dev, buf_ptr, length, source_node_id,
767 context->card->generation, true);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200768 }
769
770 packet.payload_length = dev->rcv_buffer_size;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400771 packet.interrupt = 1;
772 packet.skip = 0;
773 packet.tag = 3;
774 packet.sy = 0;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200775 packet.header_length = IEEE1394_GASP_HDR_SIZE;
776
777 spin_lock_irqsave(&dev->lock, flags);
778
779 retval = fw_iso_context_queue(dev->broadcast_rcv_context, &packet,
780 &dev->broadcast_rcv_buffer, offset);
781
782 spin_unlock_irqrestore(&dev->lock, flags);
783
Clemens Ladisch13882a82011-05-02 09:33:56 +0200784 if (retval >= 0)
785 fw_iso_context_queue_flush(dev->broadcast_rcv_context);
786 else
Stefan Richter8408dc12012-02-19 12:48:36 +0100787 dev_err(&dev->netdev->dev, "requeue failed\n");
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400788}
789
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200790static struct kmem_cache *fwnet_packet_task_cache;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400791
Stefan Richter110f82d2010-01-18 22:36:49 +0100792static void fwnet_free_ptask(struct fwnet_packet_task *ptask)
793{
794 dev_kfree_skb_any(ptask->skb);
795 kmem_cache_free(fwnet_packet_task_cache, ptask);
796}
797
Stefan Richterb2268832010-11-14 14:35:40 +0100798/* Caller must hold dev->lock. */
799static void dec_queued_datagrams(struct fwnet_device *dev)
800{
801 if (--dev->queued_datagrams == FWNET_MIN_QUEUED_DATAGRAMS)
802 netif_wake_queue(dev->netdev);
803}
804
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200805static int fwnet_send_packet(struct fwnet_packet_task *ptask);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400806
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200807static void fwnet_transmit_packet_done(struct fwnet_packet_task *ptask)
808{
Stefan Richter110f82d2010-01-18 22:36:49 +0100809 struct fwnet_device *dev = ptask->dev;
Stefan Richter902bca02010-11-06 12:36:13 +0100810 struct sk_buff *skb = ptask->skb;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400811 unsigned long flags;
Stefan Richter110f82d2010-01-18 22:36:49 +0100812 bool free;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200813
814 spin_lock_irqsave(&dev->lock, flags);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200815
Stefan Richter110f82d2010-01-18 22:36:49 +0100816 ptask->outstanding_pkts--;
817
818 /* Check whether we or the networking TX soft-IRQ is last user. */
Stefan Richter48553012010-11-06 23:18:23 +0100819 free = (ptask->outstanding_pkts == 0 && ptask->enqueued);
Stefan Richter7ee11fa2010-11-06 16:57:28 +0100820 if (free)
Stefan Richterb2268832010-11-14 14:35:40 +0100821 dec_queued_datagrams(dev);
Stefan Richter110f82d2010-01-18 22:36:49 +0100822
Stefan Richter902bca02010-11-06 12:36:13 +0100823 if (ptask->outstanding_pkts == 0) {
Stefan Richter902bca02010-11-06 12:36:13 +0100824 dev->netdev->stats.tx_packets++;
825 dev->netdev->stats.tx_bytes += skb->len;
826 }
Stefan Richter110f82d2010-01-18 22:36:49 +0100827
828 spin_unlock_irqrestore(&dev->lock, flags);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200829
830 if (ptask->outstanding_pkts > 0) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400831 u16 dg_size;
832 u16 fg_off;
833 u16 datagram_label;
834 u16 lf;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400835
836 /* Update the ptask to point to the next fragment and send it */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200837 lf = fwnet_get_hdr_lf(&ptask->hdr);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400838 switch (lf) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200839 case RFC2374_HDR_LASTFRAG:
840 case RFC2374_HDR_UNFRAG:
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400841 default:
Stefan Richter8408dc12012-02-19 12:48:36 +0100842 dev_err(&dev->netdev->dev,
843 "outstanding packet %x lf %x, header %x,%x\n",
844 ptask->outstanding_pkts, lf, ptask->hdr.w0,
845 ptask->hdr.w1);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400846 BUG();
847
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200848 case RFC2374_HDR_FIRSTFRAG:
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400849 /* Set frag type here for future interior fragments */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200850 dg_size = fwnet_get_hdr_dg_size(&ptask->hdr);
851 fg_off = ptask->max_payload - RFC2374_FRAG_HDR_SIZE;
852 datagram_label = fwnet_get_hdr_dgl(&ptask->hdr);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400853 break;
854
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200855 case RFC2374_HDR_INTFRAG:
856 dg_size = fwnet_get_hdr_dg_size(&ptask->hdr);
857 fg_off = fwnet_get_hdr_fg_off(&ptask->hdr)
858 + ptask->max_payload - RFC2374_FRAG_HDR_SIZE;
859 datagram_label = fwnet_get_hdr_dgl(&ptask->hdr);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400860 break;
861 }
Stefan Richter902bca02010-11-06 12:36:13 +0100862
Stephan Gatzka9d237342012-11-28 20:04:32 +0100863 if (ptask->dest_node == IEEE1394_ALL_NODES) {
864 skb_pull(skb,
865 ptask->max_payload + IEEE1394_GASP_HDR_SIZE);
866 } else {
867 skb_pull(skb, ptask->max_payload);
868 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200869 if (ptask->outstanding_pkts > 1) {
870 fwnet_make_sf_hdr(&ptask->hdr, RFC2374_HDR_INTFRAG,
871 dg_size, fg_off, datagram_label);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400872 } else {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200873 fwnet_make_sf_hdr(&ptask->hdr, RFC2374_HDR_LASTFRAG,
874 dg_size, fg_off, datagram_label);
875 ptask->max_payload = skb->len + RFC2374_FRAG_HDR_SIZE;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400876 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200877 fwnet_send_packet(ptask);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400878 }
Stefan Richter110f82d2010-01-18 22:36:49 +0100879
880 if (free)
881 fwnet_free_ptask(ptask);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400882}
883
Stefan Richter7ee11fa2010-11-06 16:57:28 +0100884static void fwnet_transmit_packet_failed(struct fwnet_packet_task *ptask)
885{
886 struct fwnet_device *dev = ptask->dev;
887 unsigned long flags;
888 bool free;
889
890 spin_lock_irqsave(&dev->lock, flags);
891
892 /* One fragment failed; don't try to send remaining fragments. */
893 ptask->outstanding_pkts = 0;
894
895 /* Check whether we or the networking TX soft-IRQ is last user. */
Stefan Richter48553012010-11-06 23:18:23 +0100896 free = ptask->enqueued;
Stefan Richter7ee11fa2010-11-06 16:57:28 +0100897 if (free)
Stefan Richterb2268832010-11-14 14:35:40 +0100898 dec_queued_datagrams(dev);
Stefan Richter7ee11fa2010-11-06 16:57:28 +0100899
900 dev->netdev->stats.tx_dropped++;
901 dev->netdev->stats.tx_errors++;
902
903 spin_unlock_irqrestore(&dev->lock, flags);
904
905 if (free)
906 fwnet_free_ptask(ptask);
907}
908
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200909static void fwnet_write_complete(struct fw_card *card, int rcode,
910 void *payload, size_t length, void *data)
911{
Maxim Levitskyc4d6fd42010-11-29 04:09:53 +0200912 struct fwnet_packet_task *ptask = data;
913 static unsigned long j;
914 static int last_rcode, errors_skipped;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400915
Stefan Richter7ee11fa2010-11-06 16:57:28 +0100916 if (rcode == RCODE_COMPLETE) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200917 fwnet_transmit_packet_done(ptask);
Stefan Richter7ee11fa2010-11-06 16:57:28 +0100918 } else {
Maxim Levitskyc4d6fd42010-11-29 04:09:53 +0200919 if (printk_timed_ratelimit(&j, 1000) || rcode != last_rcode) {
Stefan Richter8408dc12012-02-19 12:48:36 +0100920 dev_err(&ptask->dev->netdev->dev,
921 "fwnet_write_complete failed: %x (skipped %d)\n",
922 rcode, errors_skipped);
Maxim Levitskyc4d6fd42010-11-29 04:09:53 +0200923
924 errors_skipped = 0;
925 last_rcode = rcode;
Stefan Richter89875832014-02-18 22:25:15 +0100926 } else {
Maxim Levitskyc4d6fd42010-11-29 04:09:53 +0200927 errors_skipped++;
Stefan Richter89875832014-02-18 22:25:15 +0100928 }
929 fwnet_transmit_packet_failed(ptask);
Stefan Richter7ee11fa2010-11-06 16:57:28 +0100930 }
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400931}
932
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200933static int fwnet_send_packet(struct fwnet_packet_task *ptask)
934{
935 struct fwnet_device *dev;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400936 unsigned tx_len;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200937 struct rfc2734_header *bufhdr;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400938 unsigned long flags;
Stefan Richter110f82d2010-01-18 22:36:49 +0100939 bool free;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400940
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200941 dev = ptask->dev;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400942 tx_len = ptask->max_payload;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200943 switch (fwnet_get_hdr_lf(&ptask->hdr)) {
944 case RFC2374_HDR_UNFRAG:
945 bufhdr = (struct rfc2734_header *)
946 skb_push(ptask->skb, RFC2374_UNFRAG_HDR_SIZE);
947 put_unaligned_be32(ptask->hdr.w0, &bufhdr->w0);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400948 break;
949
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200950 case RFC2374_HDR_FIRSTFRAG:
951 case RFC2374_HDR_INTFRAG:
952 case RFC2374_HDR_LASTFRAG:
953 bufhdr = (struct rfc2734_header *)
954 skb_push(ptask->skb, RFC2374_FRAG_HDR_SIZE);
955 put_unaligned_be32(ptask->hdr.w0, &bufhdr->w0);
956 put_unaligned_be32(ptask->hdr.w1, &bufhdr->w1);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400957 break;
958
959 default:
960 BUG();
961 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200962 if (ptask->dest_node == IEEE1394_ALL_NODES) {
963 u8 *p;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400964 int generation;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200965 int node_id;
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +0000966 unsigned int sw_version;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400967
968 /* ptask->generation may not have been set yet */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200969 generation = dev->card->generation;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400970 smp_rmb();
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200971 node_id = dev->card->node_id;
972
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +0000973 switch (ptask->skb->protocol) {
974 default:
975 sw_version = RFC2734_SW_VERSION;
976 break;
977#if IS_ENABLED(CONFIG_IPV6)
978 case htons(ETH_P_IPV6):
979 sw_version = RFC3146_SW_VERSION;
980#endif
981 }
982
Stephan Gatzka9d237342012-11-28 20:04:32 +0100983 p = skb_push(ptask->skb, IEEE1394_GASP_HDR_SIZE);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200984 put_unaligned_be32(node_id << 16 | IANA_SPECIFIER_ID >> 8, p);
985 put_unaligned_be32((IANA_SPECIFIER_ID & 0xff) << 24
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +0000986 | sw_version, &p[4]);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200987
988 /* We should not transmit if broadcast_channel.valid == 0. */
989 fw_send_request(dev->card, &ptask->transaction,
990 TCODE_STREAM_DATA,
991 fw_stream_packet_destination_id(3,
992 IEEE1394_BROADCAST_CHANNEL, 0),
993 generation, SCODE_100, 0ULL, ptask->skb->data,
994 tx_len + 8, fwnet_write_complete, ptask);
995
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200996 spin_lock_irqsave(&dev->lock, flags);
Stefan Richter110f82d2010-01-18 22:36:49 +0100997
998 /* If the AT tasklet already ran, we may be last user. */
Stefan Richter48553012010-11-06 23:18:23 +0100999 free = (ptask->outstanding_pkts == 0 && !ptask->enqueued);
Stefan Richter110f82d2010-01-18 22:36:49 +01001000 if (!free)
Stefan Richter48553012010-11-06 23:18:23 +01001001 ptask->enqueued = true;
1002 else
Stefan Richterb2268832010-11-14 14:35:40 +01001003 dec_queued_datagrams(dev);
Stefan Richter110f82d2010-01-18 22:36:49 +01001004
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001005 spin_unlock_irqrestore(&dev->lock, flags);
1006
Stefan Richter110f82d2010-01-18 22:36:49 +01001007 goto out;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001008 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001009
1010 fw_send_request(dev->card, &ptask->transaction,
1011 TCODE_WRITE_BLOCK_REQUEST, ptask->dest_node,
1012 ptask->generation, ptask->speed, ptask->fifo_addr,
1013 ptask->skb->data, tx_len, fwnet_write_complete, ptask);
1014
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001015 spin_lock_irqsave(&dev->lock, flags);
Stefan Richter110f82d2010-01-18 22:36:49 +01001016
1017 /* If the AT tasklet already ran, we may be last user. */
Stefan Richter48553012010-11-06 23:18:23 +01001018 free = (ptask->outstanding_pkts == 0 && !ptask->enqueued);
Stefan Richter110f82d2010-01-18 22:36:49 +01001019 if (!free)
Stefan Richter48553012010-11-06 23:18:23 +01001020 ptask->enqueued = true;
1021 else
Stefan Richterb2268832010-11-14 14:35:40 +01001022 dec_queued_datagrams(dev);
Stefan Richter110f82d2010-01-18 22:36:49 +01001023
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001024 spin_unlock_irqrestore(&dev->lock, flags);
1025
Stefan Richter5a124d32009-06-14 11:45:27 +02001026 dev->netdev->trans_start = jiffies;
Stefan Richter110f82d2010-01-18 22:36:49 +01001027 out:
1028 if (free)
1029 fwnet_free_ptask(ptask);
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001030
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001031 return 0;
1032}
1033
YOSHIFUJI Hideaki9d39c902013-03-08 10:42:26 +09001034static void fwnet_fifo_stop(struct fwnet_device *dev)
1035{
1036 if (dev->local_fifo == FWNET_NO_FIFO_ADDR)
1037 return;
1038
1039 fw_core_remove_address_handler(&dev->handler);
1040 dev->local_fifo = FWNET_NO_FIFO_ADDR;
1041}
1042
1043static int fwnet_fifo_start(struct fwnet_device *dev)
1044{
1045 int retval;
1046
1047 if (dev->local_fifo != FWNET_NO_FIFO_ADDR)
1048 return 0;
1049
1050 dev->handler.length = 4096;
1051 dev->handler.address_callback = fwnet_receive_packet;
1052 dev->handler.callback_data = dev;
1053
1054 retval = fw_core_add_address_handler(&dev->handler,
1055 &fw_high_memory_region);
1056 if (retval < 0)
1057 return retval;
1058
1059 dev->local_fifo = dev->handler.offset;
1060
1061 return 0;
1062}
1063
YOSHIFUJI Hideaki111534c2013-03-08 10:45:50 +09001064static void __fwnet_broadcast_stop(struct fwnet_device *dev)
1065{
1066 unsigned u;
1067
1068 if (dev->broadcast_state != FWNET_BROADCAST_ERROR) {
1069 for (u = 0; u < FWNET_ISO_PAGE_COUNT; u++)
1070 kunmap(dev->broadcast_rcv_buffer.pages[u]);
1071 fw_iso_buffer_destroy(&dev->broadcast_rcv_buffer, dev->card);
1072 }
1073 if (dev->broadcast_rcv_context) {
1074 fw_iso_context_destroy(dev->broadcast_rcv_context);
1075 dev->broadcast_rcv_context = NULL;
1076 }
1077 kfree(dev->broadcast_rcv_buffer_ptrs);
1078 dev->broadcast_rcv_buffer_ptrs = NULL;
1079 dev->broadcast_state = FWNET_BROADCAST_ERROR;
1080}
1081
1082static void fwnet_broadcast_stop(struct fwnet_device *dev)
1083{
1084 if (dev->broadcast_state == FWNET_BROADCAST_ERROR)
1085 return;
1086 fw_iso_context_stop(dev->broadcast_rcv_context);
1087 __fwnet_broadcast_stop(dev);
1088}
1089
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001090static int fwnet_broadcast_start(struct fwnet_device *dev)
1091{
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001092 struct fw_iso_context *context;
1093 int retval;
1094 unsigned num_packets;
1095 unsigned max_receive;
1096 struct fw_iso_packet packet;
1097 unsigned long offset;
YOSHIFUJI Hideakif2090592013-03-08 10:43:25 +09001098 void **ptrptr;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001099 unsigned u;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001100
YOSHIFUJI Hideaki2fbd8df2013-03-08 10:43:14 +09001101 if (dev->broadcast_state != FWNET_BROADCAST_ERROR)
1102 return 0;
1103
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001104 max_receive = 1U << (dev->card->max_receive + 1);
1105 num_packets = (FWNET_ISO_PAGE_COUNT * PAGE_SIZE) / max_receive;
1106
YOSHIFUJI Hideakieac31d52013-03-08 10:43:55 +09001107 ptrptr = kmalloc(sizeof(void *) * num_packets, GFP_KERNEL);
1108 if (!ptrptr) {
1109 retval = -ENOMEM;
YOSHIFUJI Hideaki111534c2013-03-08 10:45:50 +09001110 goto failed;
YOSHIFUJI Hideakieac31d52013-03-08 10:43:55 +09001111 }
1112 dev->broadcast_rcv_buffer_ptrs = ptrptr;
1113
YOSHIFUJI Hideakif2090592013-03-08 10:43:25 +09001114 context = fw_iso_context_create(dev->card, FW_ISO_CONTEXT_RECEIVE,
1115 IEEE1394_BROADCAST_CHANNEL,
1116 dev->card->link_speed, 8,
1117 fwnet_receive_broadcast, dev);
1118 if (IS_ERR(context)) {
1119 retval = PTR_ERR(context);
YOSHIFUJI Hideaki111534c2013-03-08 10:45:50 +09001120 goto failed;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001121 }
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001122
YOSHIFUJI Hideakif2090592013-03-08 10:43:25 +09001123 retval = fw_iso_buffer_init(&dev->broadcast_rcv_buffer, dev->card,
1124 FWNET_ISO_PAGE_COUNT, DMA_FROM_DEVICE);
1125 if (retval < 0)
YOSHIFUJI Hideaki111534c2013-03-08 10:45:50 +09001126 goto failed;
1127
1128 dev->broadcast_state = FWNET_BROADCAST_STOPPED;
YOSHIFUJI Hideakif2090592013-03-08 10:43:25 +09001129
YOSHIFUJI Hideakif2090592013-03-08 10:43:25 +09001130 for (u = 0; u < FWNET_ISO_PAGE_COUNT; u++) {
1131 void *ptr;
1132 unsigned v;
1133
1134 ptr = kmap(dev->broadcast_rcv_buffer.pages[u]);
1135 for (v = 0; v < num_packets / FWNET_ISO_PAGE_COUNT; v++)
1136 *ptrptr++ = (void *) ((char *)ptr + v * max_receive);
1137 }
1138 dev->broadcast_rcv_context = context;
1139
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001140 packet.payload_length = max_receive;
1141 packet.interrupt = 1;
1142 packet.skip = 0;
1143 packet.tag = 3;
1144 packet.sy = 0;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001145 packet.header_length = IEEE1394_GASP_HDR_SIZE;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001146 offset = 0;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001147
1148 for (u = 0; u < num_packets; u++) {
1149 retval = fw_iso_context_queue(context, &packet,
1150 &dev->broadcast_rcv_buffer, offset);
1151 if (retval < 0)
YOSHIFUJI Hideaki111534c2013-03-08 10:45:50 +09001152 goto failed;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001153
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001154 offset += max_receive;
1155 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001156 dev->num_broadcast_rcv_ptrs = num_packets;
1157 dev->rcv_buffer_size = max_receive;
1158 dev->broadcast_rcv_next_ptr = 0U;
1159 retval = fw_iso_context_start(context, -1, 0,
1160 FW_ISO_CONTEXT_MATCH_ALL_TAGS); /* ??? sync */
1161 if (retval < 0)
YOSHIFUJI Hideaki111534c2013-03-08 10:45:50 +09001162 goto failed;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001163
1164 /* FIXME: adjust it according to the min. speed of all known peers? */
1165 dev->broadcast_xmt_max_payload = IEEE1394_MAX_PAYLOAD_S100
1166 - IEEE1394_GASP_HDR_SIZE - RFC2374_UNFRAG_HDR_SIZE;
1167 dev->broadcast_state = FWNET_BROADCAST_RUNNING;
1168
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001169 return 0;
1170
YOSHIFUJI Hideaki111534c2013-03-08 10:45:50 +09001171 failed:
1172 __fwnet_broadcast_stop(dev);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001173 return retval;
1174}
1175
Stefan Richterc1671472010-12-17 22:22:33 +01001176static void set_carrier_state(struct fwnet_device *dev)
1177{
1178 if (dev->peer_count > 1)
1179 netif_carrier_on(dev->netdev);
1180 else
1181 netif_carrier_off(dev->netdev);
1182}
1183
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001184/* ifup */
1185static int fwnet_open(struct net_device *net)
1186{
1187 struct fwnet_device *dev = netdev_priv(net);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001188 int ret;
1189
YOSHIFUJI Hideaki2fbd8df2013-03-08 10:43:14 +09001190 ret = fwnet_broadcast_start(dev);
1191 if (ret)
YOSHIFUJI Hideaki / 吉藤英明382c4b42013-03-25 08:25:57 +00001192 return ret;
YOSHIFUJI Hideaki2fbd8df2013-03-08 10:43:14 +09001193
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001194 netif_start_queue(net);
1195
Stefan Richterc1671472010-12-17 22:22:33 +01001196 spin_lock_irq(&dev->lock);
1197 set_carrier_state(dev);
1198 spin_unlock_irq(&dev->lock);
1199
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001200 return 0;
1201}
1202
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001203/* ifdown */
1204static int fwnet_stop(struct net_device *net)
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001205{
YOSHIFUJI Hideaki8559e7f2013-03-08 10:45:57 +09001206 struct fwnet_device *dev = netdev_priv(net);
1207
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001208 netif_stop_queue(net);
YOSHIFUJI Hideaki8559e7f2013-03-08 10:45:57 +09001209 fwnet_broadcast_stop(dev);
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001210
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001211 return 0;
1212}
1213
Stephen Hemminger424efe92009-08-31 19:50:51 +00001214static netdev_tx_t fwnet_tx(struct sk_buff *skb, struct net_device *net)
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001215{
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001216 struct fwnet_header hdr_buf;
1217 struct fwnet_device *dev = netdev_priv(net);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001218 __be16 proto;
1219 u16 dest_node;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001220 unsigned max_payload;
1221 u16 dg_size;
1222 u16 *datagram_label_ptr;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001223 struct fwnet_packet_task *ptask;
Stefan Richter5a124d32009-06-14 11:45:27 +02001224 struct fwnet_peer *peer;
1225 unsigned long flags;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001226
Stefan Richterb2268832010-11-14 14:35:40 +01001227 spin_lock_irqsave(&dev->lock, flags);
1228
1229 /* Can this happen? */
1230 if (netif_queue_stopped(dev->netdev)) {
1231 spin_unlock_irqrestore(&dev->lock, flags);
1232
1233 return NETDEV_TX_BUSY;
1234 }
1235
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001236 ptask = kmem_cache_alloc(fwnet_packet_task_cache, GFP_ATOMIC);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001237 if (ptask == NULL)
1238 goto fail;
1239
1240 skb = skb_share_check(skb, GFP_ATOMIC);
1241 if (!skb)
1242 goto fail;
1243
1244 /*
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001245 * Make a copy of the driver-specific header.
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001246 * We might need to rebuild the header on tx failure.
1247 */
1248 memcpy(&hdr_buf, skb->data, sizeof(hdr_buf));
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001249 proto = hdr_buf.h_proto;
YOSHIFUJI Hideaki / 吉藤英明18406d72013-03-25 08:25:38 +00001250
1251 switch (proto) {
1252 case htons(ETH_P_ARP):
1253 case htons(ETH_P_IP):
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001254#if IS_ENABLED(CONFIG_IPV6)
1255 case htons(ETH_P_IPV6):
1256#endif
YOSHIFUJI Hideaki / 吉藤英明18406d72013-03-25 08:25:38 +00001257 break;
1258 default:
1259 goto fail;
1260 }
1261
1262 skb_pull(skb, sizeof(hdr_buf));
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001263 dg_size = skb->len;
1264
1265 /*
1266 * Set the transmission type for the packet. ARP packets and IP
1267 * broadcast packets are sent via GASP.
1268 */
YOSHIFUJI Hideaki / 吉藤英明021b97e2013-03-25 08:25:48 +00001269 if (fwnet_hwaddr_is_multicast(hdr_buf.h_dest)) {
Stefan Richter5a124d32009-06-14 11:45:27 +02001270 max_payload = dev->broadcast_xmt_max_payload;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001271 datagram_label_ptr = &dev->broadcast_xmt_datagramlabel;
1272
Stefan Richter5a124d32009-06-14 11:45:27 +02001273 ptask->fifo_addr = FWNET_NO_FIFO_ADDR;
1274 ptask->generation = 0;
1275 ptask->dest_node = IEEE1394_ALL_NODES;
1276 ptask->speed = SCODE_100;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001277 } else {
YOSHIFUJI Hideaki / 吉藤英明6752c8d2013-03-25 08:26:16 +00001278 union fwnet_hwaddr *ha = (union fwnet_hwaddr *)hdr_buf.h_dest;
1279 __be64 guid = get_unaligned(&ha->uc.uniq_id);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001280 u8 generation;
1281
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001282 peer = fwnet_peer_find_by_guid(dev, be64_to_cpu(guid));
YOSHIFUJI Hideaki / 吉藤英明6752c8d2013-03-25 08:26:16 +00001283 if (!peer)
Stefan Richterb2268832010-11-14 14:35:40 +01001284 goto fail;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001285
Stefan Richter5a124d32009-06-14 11:45:27 +02001286 generation = peer->generation;
1287 dest_node = peer->node_id;
1288 max_payload = peer->max_payload;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001289 datagram_label_ptr = &peer->datagram_label;
1290
YOSHIFUJI Hideaki / 吉藤英明6752c8d2013-03-25 08:26:16 +00001291 ptask->fifo_addr = fwnet_hwaddr_fifo(ha);
Stefan Richter5a124d32009-06-14 11:45:27 +02001292 ptask->generation = generation;
1293 ptask->dest_node = dest_node;
1294 ptask->speed = peer->speed;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001295 }
1296
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001297 ptask->hdr.w0 = 0;
1298 ptask->hdr.w1 = 0;
1299 ptask->skb = skb;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001300 ptask->dev = dev;
1301
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001302 /* Does it all fit in one packet? */
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001303 if (dg_size <= max_payload) {
1304 fwnet_make_uf_hdr(&ptask->hdr, ntohs(proto));
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001305 ptask->outstanding_pkts = 1;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001306 max_payload = dg_size + RFC2374_UNFRAG_HDR_SIZE;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001307 } else {
1308 u16 datagram_label;
1309
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001310 max_payload -= RFC2374_FRAG_OVERHEAD;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001311 datagram_label = (*datagram_label_ptr)++;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001312 fwnet_make_ff_hdr(&ptask->hdr, ntohs(proto), dg_size,
1313 datagram_label);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001314 ptask->outstanding_pkts = DIV_ROUND_UP(dg_size, max_payload);
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001315 max_payload += RFC2374_FRAG_HDR_SIZE;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001316 }
Stefan Richter5a124d32009-06-14 11:45:27 +02001317
Stefan Richterb2268832010-11-14 14:35:40 +01001318 if (++dev->queued_datagrams == FWNET_MAX_QUEUED_DATAGRAMS)
1319 netif_stop_queue(dev->netdev);
Stefan Richter48553012010-11-06 23:18:23 +01001320
Stefan Richter5a124d32009-06-14 11:45:27 +02001321 spin_unlock_irqrestore(&dev->lock, flags);
1322
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001323 ptask->max_payload = max_payload;
Stefan Richter48553012010-11-06 23:18:23 +01001324 ptask->enqueued = 0;
Stefan Richter110f82d2010-01-18 22:36:49 +01001325
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001326 fwnet_send_packet(ptask);
1327
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001328 return NETDEV_TX_OK;
1329
1330 fail:
Stefan Richterb2268832010-11-14 14:35:40 +01001331 spin_unlock_irqrestore(&dev->lock, flags);
1332
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001333 if (ptask)
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001334 kmem_cache_free(fwnet_packet_task_cache, ptask);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001335
1336 if (skb != NULL)
1337 dev_kfree_skb(skb);
1338
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001339 net->stats.tx_dropped++;
1340 net->stats.tx_errors++;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001341
1342 /*
1343 * FIXME: According to a patch from 2003-02-26, "returning non-zero
1344 * causes serious problems" here, allegedly. Before that patch,
1345 * -ERRNO was returned which is not appropriate under Linux 2.6.
1346 * Perhaps more needs to be done? Stop the queue in serious
1347 * conditions and restart it elsewhere?
1348 */
1349 return NETDEV_TX_OK;
1350}
1351
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001352static int fwnet_change_mtu(struct net_device *net, int new_mtu)
1353{
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001354 if (new_mtu < 68)
1355 return -EINVAL;
1356
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001357 net->mtu = new_mtu;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001358 return 0;
1359}
1360
Maxim Levitsky18bb36f2010-12-08 04:22:57 +02001361static const struct ethtool_ops fwnet_ethtool_ops = {
1362 .get_link = ethtool_op_get_link,
1363};
1364
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001365static const struct net_device_ops fwnet_netdev_ops = {
1366 .ndo_open = fwnet_open,
1367 .ndo_stop = fwnet_stop,
1368 .ndo_start_xmit = fwnet_tx,
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001369 .ndo_change_mtu = fwnet_change_mtu,
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001370};
1371
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001372static void fwnet_init_dev(struct net_device *net)
1373{
1374 net->header_ops = &fwnet_header_ops;
1375 net->netdev_ops = &fwnet_netdev_ops;
Stefan Richter1337f852009-06-14 11:47:44 +02001376 net->watchdog_timeo = 2 * HZ;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001377 net->flags = IFF_BROADCAST | IFF_MULTICAST;
1378 net->features = NETIF_F_HIGHDMA;
1379 net->addr_len = FWNET_ALEN;
1380 net->hard_header_len = FWNET_HLEN;
1381 net->type = ARPHRD_IEEE1394;
Stefan Richterb2268832010-11-14 14:35:40 +01001382 net->tx_queue_len = FWNET_TX_QUEUE_LEN;
Maxim Levitsky18bb36f2010-12-08 04:22:57 +02001383 net->ethtool_ops = &fwnet_ethtool_ops;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001384}
1385
Stefan Richter5a124d32009-06-14 11:45:27 +02001386/* caller must hold fwnet_device_mutex */
1387static struct fwnet_device *fwnet_dev_find(struct fw_card *card)
1388{
1389 struct fwnet_device *dev;
1390
1391 list_for_each_entry(dev, &fwnet_device_list, dev_link)
1392 if (dev->card == card)
1393 return dev;
1394
1395 return NULL;
1396}
1397
1398static int fwnet_add_peer(struct fwnet_device *dev,
1399 struct fw_unit *unit, struct fw_device *device)
1400{
1401 struct fwnet_peer *peer;
1402
1403 peer = kmalloc(sizeof(*peer), GFP_KERNEL);
1404 if (!peer)
1405 return -ENOMEM;
1406
Stefan Richterb01b4ba2009-06-16 20:43:55 +02001407 dev_set_drvdata(&unit->device, peer);
1408
Stefan Richter5a124d32009-06-14 11:45:27 +02001409 peer->dev = dev;
1410 peer->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4];
Stefan Richter5a124d32009-06-14 11:45:27 +02001411 INIT_LIST_HEAD(&peer->pd_list);
1412 peer->pdg_size = 0;
1413 peer->datagram_label = 0;
1414 peer->speed = device->max_speed;
1415 peer->max_payload = fwnet_max_payload(device->max_rec, peer->speed);
1416
1417 peer->generation = device->generation;
1418 smp_rmb();
1419 peer->node_id = device->node_id;
1420
1421 spin_lock_irq(&dev->lock);
1422 list_add_tail(&peer->peer_link, &dev->peer_list);
Maxim Levitsky18bb36f2010-12-08 04:22:57 +02001423 dev->peer_count++;
Stefan Richterc1671472010-12-17 22:22:33 +01001424 set_carrier_state(dev);
Stefan Richter5a124d32009-06-14 11:45:27 +02001425 spin_unlock_irq(&dev->lock);
1426
1427 return 0;
1428}
1429
Stefan Richter94a87152013-06-09 18:15:00 +02001430static int fwnet_probe(struct fw_unit *unit,
1431 const struct ieee1394_device_id *id)
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001432{
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001433 struct fw_device *device = fw_parent_device(unit);
1434 struct fw_card *card = device->card;
1435 struct net_device *net;
Stefan Richterb01b4ba2009-06-16 20:43:55 +02001436 bool allocated_netdev = false;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001437 struct fwnet_device *dev;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001438 unsigned max_mtu;
Stefan Richter5a124d32009-06-14 11:45:27 +02001439 int ret;
YOSHIFUJI Hideaki / 吉藤英明6752c8d2013-03-25 08:26:16 +00001440 union fwnet_hwaddr *ha;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001441
Stefan Richter5a124d32009-06-14 11:45:27 +02001442 mutex_lock(&fwnet_device_mutex);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001443
Stefan Richter5a124d32009-06-14 11:45:27 +02001444 dev = fwnet_dev_find(card);
1445 if (dev) {
Stefan Richter5a124d32009-06-14 11:45:27 +02001446 net = dev->netdev;
1447 goto have_dev;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001448 }
Stefan Richter5a124d32009-06-14 11:45:27 +02001449
Tom Gundersenc835a672014-07-14 16:37:24 +02001450 net = alloc_netdev(sizeof(*dev), "firewire%d", NET_NAME_UNKNOWN,
1451 fwnet_init_dev);
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001452 if (net == NULL) {
Daeseok Youn1118f8d2014-04-29 18:49:47 +09001453 mutex_unlock(&fwnet_device_mutex);
1454 return -ENOMEM;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001455 }
1456
Stefan Richterb01b4ba2009-06-16 20:43:55 +02001457 allocated_netdev = true;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001458 SET_NETDEV_DEV(net, card->device);
1459 dev = netdev_priv(net);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001460
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001461 spin_lock_init(&dev->lock);
1462 dev->broadcast_state = FWNET_BROADCAST_ERROR;
1463 dev->broadcast_rcv_context = NULL;
1464 dev->broadcast_xmt_max_payload = 0;
1465 dev->broadcast_xmt_datagramlabel = 0;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001466 dev->local_fifo = FWNET_NO_FIFO_ADDR;
Stefan Richter48553012010-11-06 23:18:23 +01001467 dev->queued_datagrams = 0;
Stefan Richter5a124d32009-06-14 11:45:27 +02001468 INIT_LIST_HEAD(&dev->peer_list);
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001469 dev->card = card;
Stefan Richter5a124d32009-06-14 11:45:27 +02001470 dev->netdev = net;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001471
YOSHIFUJI Hideaki / 吉藤英明382c4b42013-03-25 08:25:57 +00001472 ret = fwnet_fifo_start(dev);
1473 if (ret < 0)
1474 goto out;
1475 dev->local_fifo = dev->handler.offset;
1476
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001477 /*
1478 * Use the RFC 2734 default 1500 octets or the maximum payload
1479 * as initial MTU
1480 */
1481 max_mtu = (1 << (card->max_receive + 1))
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001482 - sizeof(struct rfc2734_header) - IEEE1394_GASP_HDR_SIZE;
1483 net->mtu = min(1500U, max_mtu);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001484
1485 /* Set our hardware address while we're at it */
YOSHIFUJI Hideaki / 吉藤英明6752c8d2013-03-25 08:26:16 +00001486 ha = (union fwnet_hwaddr *)net->dev_addr;
1487 put_unaligned_be64(card->guid, &ha->uc.uniq_id);
1488 ha->uc.max_rec = dev->card->max_receive;
1489 ha->uc.sspd = dev->card->link_speed;
1490 put_unaligned_be16(dev->local_fifo >> 32, &ha->uc.fifo_hi);
1491 put_unaligned_be32(dev->local_fifo & 0xffffffff, &ha->uc.fifo_lo);
1492
1493 memset(net->broadcast, -1, net->addr_len);
1494
Stefan Richter5a124d32009-06-14 11:45:27 +02001495 ret = register_netdev(net);
Stefan Richter8408dc12012-02-19 12:48:36 +01001496 if (ret)
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001497 goto out;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001498
Stefan Richter5a124d32009-06-14 11:45:27 +02001499 list_add_tail(&dev->dev_link, &fwnet_device_list);
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001500 dev_notice(&net->dev, "IP over IEEE 1394 on card %s\n",
Stefan Richter8408dc12012-02-19 12:48:36 +01001501 dev_name(card->device));
Stefan Richter5a124d32009-06-14 11:45:27 +02001502 have_dev:
1503 ret = fwnet_add_peer(dev, unit, device);
Stefan Richterb01b4ba2009-06-16 20:43:55 +02001504 if (ret && allocated_netdev) {
Stefan Richter5a124d32009-06-14 11:45:27 +02001505 unregister_netdev(net);
1506 list_del(&dev->dev_link);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001507 out:
YOSHIFUJI Hideaki / 吉藤英明382c4b42013-03-25 08:25:57 +00001508 fwnet_fifo_stop(dev);
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001509 free_netdev(net);
YOSHIFUJI Hideaki / 吉藤英明382c4b42013-03-25 08:25:57 +00001510 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001511
Stefan Richter5a124d32009-06-14 11:45:27 +02001512 mutex_unlock(&fwnet_device_mutex);
1513
1514 return ret;
1515}
1516
Stefan Richter94a87152013-06-09 18:15:00 +02001517/*
1518 * FIXME abort partially sent fragmented datagrams,
1519 * discard partially received fragmented datagrams
1520 */
1521static void fwnet_update(struct fw_unit *unit)
1522{
1523 struct fw_device *device = fw_parent_device(unit);
1524 struct fwnet_peer *peer = dev_get_drvdata(&unit->device);
1525 int generation;
1526
1527 generation = device->generation;
1528
1529 spin_lock_irq(&peer->dev->lock);
1530 peer->node_id = device->node_id;
1531 peer->generation = generation;
1532 spin_unlock_irq(&peer->dev->lock);
1533}
1534
Stefan Richterc1671472010-12-17 22:22:33 +01001535static void fwnet_remove_peer(struct fwnet_peer *peer, struct fwnet_device *dev)
Stefan Richter5a124d32009-06-14 11:45:27 +02001536{
1537 struct fwnet_partial_datagram *pd, *pd_next;
1538
Stefan Richterc1671472010-12-17 22:22:33 +01001539 spin_lock_irq(&dev->lock);
Stefan Richter5a124d32009-06-14 11:45:27 +02001540 list_del(&peer->peer_link);
Stefan Richterc1671472010-12-17 22:22:33 +01001541 dev->peer_count--;
1542 set_carrier_state(dev);
1543 spin_unlock_irq(&dev->lock);
Stefan Richter5a124d32009-06-14 11:45:27 +02001544
1545 list_for_each_entry_safe(pd, pd_next, &peer->pd_list, pd_link)
1546 fwnet_pd_delete(pd);
1547
1548 kfree(peer);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001549}
1550
Stefan Richter94a87152013-06-09 18:15:00 +02001551static void fwnet_remove(struct fw_unit *unit)
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001552{
Stefan Richter94a87152013-06-09 18:15:00 +02001553 struct fwnet_peer *peer = dev_get_drvdata(&unit->device);
Stefan Richter5a124d32009-06-14 11:45:27 +02001554 struct fwnet_device *dev = peer->dev;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001555 struct net_device *net;
Stefan Richter48553012010-11-06 23:18:23 +01001556 int i;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001557
Stefan Richter5a124d32009-06-14 11:45:27 +02001558 mutex_lock(&fwnet_device_mutex);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001559
Maxim Levitsky74a14502010-11-29 04:09:52 +02001560 net = dev->netdev;
Maxim Levitsky74a14502010-11-29 04:09:52 +02001561
Stefan Richterc1671472010-12-17 22:22:33 +01001562 fwnet_remove_peer(peer, dev);
Maxim Levitsky18bb36f2010-12-08 04:22:57 +02001563
Stefan Richter5a124d32009-06-14 11:45:27 +02001564 if (list_empty(&dev->peer_list)) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001565 unregister_netdev(net);
1566
YOSHIFUJI Hideaki / 吉藤英明382c4b42013-03-25 08:25:57 +00001567 fwnet_fifo_stop(dev);
1568
Stefan Richter48553012010-11-06 23:18:23 +01001569 for (i = 0; dev->queued_datagrams && i < 5; i++)
1570 ssleep(1);
1571 WARN_ON(dev->queued_datagrams);
Stefan Richterb01b4ba2009-06-16 20:43:55 +02001572 list_del(&dev->dev_link);
1573
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001574 free_netdev(net);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001575 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001576
Stefan Richter5a124d32009-06-14 11:45:27 +02001577 mutex_unlock(&fwnet_device_mutex);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001578}
1579
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001580static const struct ieee1394_device_id fwnet_id_table[] = {
1581 {
1582 .match_flags = IEEE1394_MATCH_SPECIFIER_ID |
1583 IEEE1394_MATCH_VERSION,
1584 .specifier_id = IANA_SPECIFIER_ID,
1585 .version = RFC2734_SW_VERSION,
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001586 },
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001587#if IS_ENABLED(CONFIG_IPV6)
1588 {
1589 .match_flags = IEEE1394_MATCH_SPECIFIER_ID |
1590 IEEE1394_MATCH_VERSION,
1591 .specifier_id = IANA_SPECIFIER_ID,
1592 .version = RFC3146_SW_VERSION,
1593 },
1594#endif
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001595 { }
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001596};
1597
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001598static struct fw_driver fwnet_driver = {
1599 .driver = {
1600 .owner = THIS_MODULE,
Stefan Richter59759ff2012-02-18 22:01:54 +01001601 .name = KBUILD_MODNAME,
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001602 .bus = &fw_bus_type,
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001603 },
Stefan Richter94a87152013-06-09 18:15:00 +02001604 .probe = fwnet_probe,
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001605 .update = fwnet_update,
Stefan Richter94a87152013-06-09 18:15:00 +02001606 .remove = fwnet_remove,
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001607 .id_table = fwnet_id_table,
1608};
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001609
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001610static const u32 rfc2374_unit_directory_data[] = {
1611 0x00040000, /* directory_length */
1612 0x1200005e, /* unit_specifier_id: IANA */
1613 0x81000003, /* textual descriptor offset */
1614 0x13000001, /* unit_sw_version: RFC 2734 */
1615 0x81000005, /* textual descriptor offset */
1616 0x00030000, /* descriptor_length */
1617 0x00000000, /* text */
1618 0x00000000, /* minimal ASCII, en */
1619 0x49414e41, /* I A N A */
1620 0x00030000, /* descriptor_length */
1621 0x00000000, /* text */
1622 0x00000000, /* minimal ASCII, en */
1623 0x49507634, /* I P v 4 */
1624};
1625
1626static struct fw_descriptor rfc2374_unit_directory = {
1627 .length = ARRAY_SIZE(rfc2374_unit_directory_data),
1628 .key = (CSR_DIRECTORY | CSR_UNIT) << 24,
1629 .data = rfc2374_unit_directory_data
1630};
1631
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001632#if IS_ENABLED(CONFIG_IPV6)
1633static const u32 rfc3146_unit_directory_data[] = {
1634 0x00040000, /* directory_length */
1635 0x1200005e, /* unit_specifier_id: IANA */
1636 0x81000003, /* textual descriptor offset */
1637 0x13000002, /* unit_sw_version: RFC 3146 */
1638 0x81000005, /* textual descriptor offset */
1639 0x00030000, /* descriptor_length */
1640 0x00000000, /* text */
1641 0x00000000, /* minimal ASCII, en */
1642 0x49414e41, /* I A N A */
1643 0x00030000, /* descriptor_length */
1644 0x00000000, /* text */
1645 0x00000000, /* minimal ASCII, en */
1646 0x49507636, /* I P v 6 */
1647};
1648
1649static struct fw_descriptor rfc3146_unit_directory = {
1650 .length = ARRAY_SIZE(rfc3146_unit_directory_data),
1651 .key = (CSR_DIRECTORY | CSR_UNIT) << 24,
1652 .data = rfc3146_unit_directory_data
1653};
1654#endif
1655
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001656static int __init fwnet_init(void)
1657{
1658 int err;
1659
1660 err = fw_core_add_descriptor(&rfc2374_unit_directory);
1661 if (err)
1662 return err;
1663
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001664#if IS_ENABLED(CONFIG_IPV6)
1665 err = fw_core_add_descriptor(&rfc3146_unit_directory);
1666 if (err)
1667 goto out;
1668#endif
1669
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001670 fwnet_packet_task_cache = kmem_cache_create("packet_task",
1671 sizeof(struct fwnet_packet_task), 0, 0, NULL);
1672 if (!fwnet_packet_task_cache) {
1673 err = -ENOMEM;
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001674 goto out2;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001675 }
1676
1677 err = driver_register(&fwnet_driver.driver);
1678 if (!err)
1679 return 0;
1680
1681 kmem_cache_destroy(fwnet_packet_task_cache);
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001682out2:
1683#if IS_ENABLED(CONFIG_IPV6)
1684 fw_core_remove_descriptor(&rfc3146_unit_directory);
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001685out:
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001686#endif
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001687 fw_core_remove_descriptor(&rfc2374_unit_directory);
1688
1689 return err;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001690}
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001691module_init(fwnet_init);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001692
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001693static void __exit fwnet_cleanup(void)
1694{
1695 driver_unregister(&fwnet_driver.driver);
1696 kmem_cache_destroy(fwnet_packet_task_cache);
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001697#if IS_ENABLED(CONFIG_IPV6)
1698 fw_core_remove_descriptor(&rfc3146_unit_directory);
1699#endif
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001700 fw_core_remove_descriptor(&rfc2374_unit_directory);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001701}
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001702module_exit(fwnet_cleanup);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001703
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001704MODULE_AUTHOR("Jay Fenlason <fenlason@redhat.com>");
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001705MODULE_DESCRIPTION("IP over IEEE1394 as per RFC 2734/3146");
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001706MODULE_LICENSE("GPL");
1707MODULE_DEVICE_TABLE(ieee1394, fwnet_id_table);