blob: 15475892af0c948c12f0f5c9ba6375c1f51bdcbf [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))
Stefan Richtere9300a42016-10-30 17:32:01 +010076#define fwnet_get_hdr_dg_size(h) ((((h)->w0 & 0x0fff0000) >> 16) + 1)
Stefan Richterf91e3bd2009-06-07 22:57:53 +020077#define fwnet_get_hdr_fg_off(h) (((h)->w0 & 0x00000fff))
78#define fwnet_get_hdr_dgl(h) (((h)->w1 & 0xffff0000) >> 16)
79
Stefan Richtere9300a42016-10-30 17:32:01 +010080#define fwnet_set_hdr_lf(lf) ((lf) << 30)
Stefan Richterf91e3bd2009-06-07 22:57:53 +020081#define fwnet_set_hdr_ether_type(et) (et)
Stefan Richtere9300a42016-10-30 17:32:01 +010082#define fwnet_set_hdr_dg_size(dgs) (((dgs) - 1) << 16)
Stefan Richterf91e3bd2009-06-07 22:57:53 +020083#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 Richter667121a2016-10-29 21:28:18 +0200581 if (len <= RFC2374_UNFRAG_HDR_SIZE)
582 return 0;
583
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200584 hdr.w0 = be32_to_cpu(buf[0]);
585 lf = fwnet_get_hdr_lf(&hdr);
586 if (lf == RFC2374_HDR_UNFRAG) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400587 /*
588 * An unfragmented datagram has been received by the ieee1394
589 * bus. Build an skbuff around it so we can pass it to the
590 * high level network layer.
591 */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200592 ether_type = fwnet_get_hdr_ether_type(&hdr);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400593 buf++;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200594 len -= RFC2374_UNFRAG_HDR_SIZE;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400595
YOSHIFUJI Hideaki / 吉藤英明82586342013-01-19 22:03:07 +0000596 skb = dev_alloc_skb(len + LL_RESERVED_SPACE(net));
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400597 if (unlikely(!skb)) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200598 net->stats.rx_dropped++;
599
Stefan Richter1bf145f2010-08-16 23:45:54 +0200600 return -ENOMEM;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400601 }
YOSHIFUJI Hideaki / 吉藤英明82586342013-01-19 22:03:07 +0000602 skb_reserve(skb, LL_RESERVED_SPACE(net));
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200603 memcpy(skb_put(skb, len), buf, len);
604
605 return fwnet_finish_incoming_packet(net, skb, source_node_id,
606 is_broadcast, ether_type);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400607 }
Stefan Richter667121a2016-10-29 21:28:18 +0200608
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400609 /* A datagram fragment has been received, now the fun begins. */
Stefan Richter667121a2016-10-29 21:28:18 +0200610
611 if (len <= RFC2374_FRAG_HDR_SIZE)
612 return 0;
613
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400614 hdr.w1 = ntohl(buf[1]);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200615 buf += 2;
616 len -= RFC2374_FRAG_HDR_SIZE;
617 if (lf == RFC2374_HDR_FIRSTFRAG) {
618 ether_type = fwnet_get_hdr_ether_type(&hdr);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400619 fg_off = 0;
620 } else {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200621 ether_type = 0;
622 fg_off = fwnet_get_hdr_fg_off(&hdr);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400623 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200624 datagram_label = fwnet_get_hdr_dgl(&hdr);
Stefan Richtere9300a42016-10-30 17:32:01 +0100625 dg_size = fwnet_get_hdr_dg_size(&hdr);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200626
Stefan Richter667121a2016-10-29 21:28:18 +0200627 if (fg_off + len > dg_size)
628 return 0;
629
Stefan Richter5a124d32009-06-14 11:45:27 +0200630 spin_lock_irqsave(&dev->lock, flags);
631
632 peer = fwnet_peer_find_by_node_id(dev, source_node_id, generation);
Stefan Richter1bf145f2010-08-16 23:45:54 +0200633 if (!peer) {
634 retval = -ENOENT;
635 goto fail;
636 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200637
638 pd = fwnet_pd_find(peer, datagram_label);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400639 if (pd == NULL) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200640 while (peer->pdg_size >= FWNET_MAX_FRAGMENTS) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400641 /* remove the oldest */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200642 fwnet_pd_delete(list_first_entry(&peer->pd_list,
643 struct fwnet_partial_datagram, pd_link));
644 peer->pdg_size--;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400645 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200646 pd = fwnet_pd_new(net, peer, datagram_label,
647 dg_size, buf, fg_off, len);
648 if (pd == NULL) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400649 retval = -ENOMEM;
Stefan Richter1bf145f2010-08-16 23:45:54 +0200650 goto fail;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400651 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200652 peer->pdg_size++;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400653 } else {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200654 if (fwnet_frag_overlap(pd, fg_off, len) ||
655 pd->datagram_size != dg_size) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400656 /*
657 * Differing datagram sizes or overlapping fragments,
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200658 * discard old datagram and start a new one.
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400659 */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200660 fwnet_pd_delete(pd);
661 pd = fwnet_pd_new(net, peer, datagram_label,
662 dg_size, buf, fg_off, len);
663 if (pd == NULL) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200664 peer->pdg_size--;
Stefan Richter1bf145f2010-08-16 23:45:54 +0200665 retval = -ENOMEM;
666 goto fail;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400667 }
668 } else {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200669 if (!fwnet_pd_update(peer, pd, buf, fg_off, len)) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400670 /*
671 * Couldn't save off fragment anyway
672 * so might as well obliterate the
673 * datagram now.
674 */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200675 fwnet_pd_delete(pd);
676 peer->pdg_size--;
Stefan Richter1bf145f2010-08-16 23:45:54 +0200677 retval = -ENOMEM;
678 goto fail;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400679 }
680 }
681 } /* new datagram or add to existing one */
682
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200683 if (lf == RFC2374_HDR_FIRSTFRAG)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400684 pd->ether_type = ether_type;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200685
686 if (fwnet_pd_is_complete(pd)) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400687 ether_type = pd->ether_type;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200688 peer->pdg_size--;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400689 skb = skb_get(pd->skb);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200690 fwnet_pd_delete(pd);
691
Stefan Richter5a124d32009-06-14 11:45:27 +0200692 spin_unlock_irqrestore(&dev->lock, flags);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200693
694 return fwnet_finish_incoming_packet(net, skb, source_node_id,
695 false, ether_type);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400696 }
697 /*
698 * Datagram is not complete, we're done for the
699 * moment.
700 */
Stefan Richterb2268832010-11-14 14:35:40 +0100701 retval = 0;
Stefan Richter1bf145f2010-08-16 23:45:54 +0200702 fail:
Stefan Richter5a124d32009-06-14 11:45:27 +0200703 spin_unlock_irqrestore(&dev->lock, flags);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200704
Stefan Richter1bf145f2010-08-16 23:45:54 +0200705 return retval;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400706}
707
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200708static void fwnet_receive_packet(struct fw_card *card, struct fw_request *r,
709 int tcode, int destination, int source, int generation,
Stefan Richter33e553f2010-06-20 22:50:35 +0200710 unsigned long long offset, void *payload, size_t length,
711 void *callback_data)
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200712{
Stefan Richter00635b82009-06-16 22:35:32 +0200713 struct fwnet_device *dev = callback_data;
714 int rcode;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400715
Stefan Richter00635b82009-06-16 22:35:32 +0200716 if (destination == IEEE1394_ALL_NODES) {
717 kfree(r);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200718
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400719 return;
720 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200721
Stefan Richter00635b82009-06-16 22:35:32 +0200722 if (offset != dev->handler.offset)
723 rcode = RCODE_ADDRESS_ERROR;
724 else if (tcode != TCODE_WRITE_BLOCK_REQUEST)
725 rcode = RCODE_TYPE_ERROR;
726 else if (fwnet_incoming_packet(dev, payload, length,
727 source, generation, false) != 0) {
Stefan Richter8408dc12012-02-19 12:48:36 +0100728 dev_err(&dev->netdev->dev, "incoming packet failure\n");
Stefan Richter00635b82009-06-16 22:35:32 +0200729 rcode = RCODE_CONFLICT_ERROR;
730 } else
731 rcode = RCODE_COMPLETE;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200732
Stefan Richter00635b82009-06-16 22:35:32 +0200733 fw_send_response(card, r, rcode);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400734}
735
Stefan Richter667121a2016-10-29 21:28:18 +0200736static int gasp_source_id(__be32 *p)
737{
738 return be32_to_cpu(p[0]) >> 16;
739}
740
741static u32 gasp_specifier_id(__be32 *p)
742{
743 return (be32_to_cpu(p[0]) & 0xffff) << 8 |
744 (be32_to_cpu(p[1]) & 0xff000000) >> 24;
745}
746
747static u32 gasp_version(__be32 *p)
748{
749 return be32_to_cpu(p[1]) & 0xffffff;
750}
751
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200752static void fwnet_receive_broadcast(struct fw_iso_context *context,
753 u32 cycle, size_t header_length, void *header, void *data)
754{
755 struct fwnet_device *dev;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400756 struct fw_iso_packet packet;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200757 __be16 *hdr_ptr;
758 __be32 *buf_ptr;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400759 int retval;
760 u32 length;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400761 unsigned long offset;
762 unsigned long flags;
763
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200764 dev = data;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400765 hdr_ptr = header;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200766 length = be16_to_cpup(hdr_ptr);
767
768 spin_lock_irqsave(&dev->lock, flags);
769
770 offset = dev->rcv_buffer_size * dev->broadcast_rcv_next_ptr;
771 buf_ptr = dev->broadcast_rcv_buffer_ptrs[dev->broadcast_rcv_next_ptr++];
772 if (dev->broadcast_rcv_next_ptr == dev->num_broadcast_rcv_ptrs)
773 dev->broadcast_rcv_next_ptr = 0;
774
775 spin_unlock_irqrestore(&dev->lock, flags);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400776
Stefan Richter667121a2016-10-29 21:28:18 +0200777 if (length > IEEE1394_GASP_HDR_SIZE &&
778 gasp_specifier_id(buf_ptr) == IANA_SPECIFIER_ID &&
779 (gasp_version(buf_ptr) == RFC2734_SW_VERSION
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +0000780#if IS_ENABLED(CONFIG_IPV6)
Stefan Richter667121a2016-10-29 21:28:18 +0200781 || gasp_version(buf_ptr) == RFC3146_SW_VERSION
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +0000782#endif
Stefan Richter667121a2016-10-29 21:28:18 +0200783 ))
784 fwnet_incoming_packet(dev, buf_ptr + 2,
785 length - IEEE1394_GASP_HDR_SIZE,
786 gasp_source_id(buf_ptr),
Stephan Gatzka9d237342012-11-28 20:04:32 +0100787 context->card->generation, true);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200788
789 packet.payload_length = dev->rcv_buffer_size;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400790 packet.interrupt = 1;
791 packet.skip = 0;
792 packet.tag = 3;
793 packet.sy = 0;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200794 packet.header_length = IEEE1394_GASP_HDR_SIZE;
795
796 spin_lock_irqsave(&dev->lock, flags);
797
798 retval = fw_iso_context_queue(dev->broadcast_rcv_context, &packet,
799 &dev->broadcast_rcv_buffer, offset);
800
801 spin_unlock_irqrestore(&dev->lock, flags);
802
Clemens Ladisch13882a82011-05-02 09:33:56 +0200803 if (retval >= 0)
804 fw_iso_context_queue_flush(dev->broadcast_rcv_context);
805 else
Stefan Richter8408dc12012-02-19 12:48:36 +0100806 dev_err(&dev->netdev->dev, "requeue failed\n");
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400807}
808
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200809static struct kmem_cache *fwnet_packet_task_cache;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400810
Stefan Richter110f82d2010-01-18 22:36:49 +0100811static void fwnet_free_ptask(struct fwnet_packet_task *ptask)
812{
813 dev_kfree_skb_any(ptask->skb);
814 kmem_cache_free(fwnet_packet_task_cache, ptask);
815}
816
Stefan Richterb2268832010-11-14 14:35:40 +0100817/* Caller must hold dev->lock. */
818static void dec_queued_datagrams(struct fwnet_device *dev)
819{
820 if (--dev->queued_datagrams == FWNET_MIN_QUEUED_DATAGRAMS)
821 netif_wake_queue(dev->netdev);
822}
823
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200824static int fwnet_send_packet(struct fwnet_packet_task *ptask);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400825
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200826static void fwnet_transmit_packet_done(struct fwnet_packet_task *ptask)
827{
Stefan Richter110f82d2010-01-18 22:36:49 +0100828 struct fwnet_device *dev = ptask->dev;
Stefan Richter902bca02010-11-06 12:36:13 +0100829 struct sk_buff *skb = ptask->skb;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400830 unsigned long flags;
Stefan Richter110f82d2010-01-18 22:36:49 +0100831 bool free;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200832
833 spin_lock_irqsave(&dev->lock, flags);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200834
Stefan Richter110f82d2010-01-18 22:36:49 +0100835 ptask->outstanding_pkts--;
836
837 /* Check whether we or the networking TX soft-IRQ is last user. */
Stefan Richter48553012010-11-06 23:18:23 +0100838 free = (ptask->outstanding_pkts == 0 && ptask->enqueued);
Stefan Richter7ee11fa2010-11-06 16:57:28 +0100839 if (free)
Stefan Richterb2268832010-11-14 14:35:40 +0100840 dec_queued_datagrams(dev);
Stefan Richter110f82d2010-01-18 22:36:49 +0100841
Stefan Richter902bca02010-11-06 12:36:13 +0100842 if (ptask->outstanding_pkts == 0) {
Stefan Richter902bca02010-11-06 12:36:13 +0100843 dev->netdev->stats.tx_packets++;
844 dev->netdev->stats.tx_bytes += skb->len;
845 }
Stefan Richter110f82d2010-01-18 22:36:49 +0100846
847 spin_unlock_irqrestore(&dev->lock, flags);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200848
849 if (ptask->outstanding_pkts > 0) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400850 u16 dg_size;
851 u16 fg_off;
852 u16 datagram_label;
853 u16 lf;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400854
855 /* Update the ptask to point to the next fragment and send it */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200856 lf = fwnet_get_hdr_lf(&ptask->hdr);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400857 switch (lf) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200858 case RFC2374_HDR_LASTFRAG:
859 case RFC2374_HDR_UNFRAG:
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400860 default:
Stefan Richter8408dc12012-02-19 12:48:36 +0100861 dev_err(&dev->netdev->dev,
862 "outstanding packet %x lf %x, header %x,%x\n",
863 ptask->outstanding_pkts, lf, ptask->hdr.w0,
864 ptask->hdr.w1);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400865 BUG();
866
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200867 case RFC2374_HDR_FIRSTFRAG:
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400868 /* Set frag type here for future interior fragments */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200869 dg_size = fwnet_get_hdr_dg_size(&ptask->hdr);
870 fg_off = ptask->max_payload - RFC2374_FRAG_HDR_SIZE;
871 datagram_label = fwnet_get_hdr_dgl(&ptask->hdr);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400872 break;
873
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200874 case RFC2374_HDR_INTFRAG:
875 dg_size = fwnet_get_hdr_dg_size(&ptask->hdr);
876 fg_off = fwnet_get_hdr_fg_off(&ptask->hdr)
877 + ptask->max_payload - RFC2374_FRAG_HDR_SIZE;
878 datagram_label = fwnet_get_hdr_dgl(&ptask->hdr);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400879 break;
880 }
Stefan Richter902bca02010-11-06 12:36:13 +0100881
Stephan Gatzka9d237342012-11-28 20:04:32 +0100882 if (ptask->dest_node == IEEE1394_ALL_NODES) {
883 skb_pull(skb,
884 ptask->max_payload + IEEE1394_GASP_HDR_SIZE);
885 } else {
886 skb_pull(skb, ptask->max_payload);
887 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200888 if (ptask->outstanding_pkts > 1) {
889 fwnet_make_sf_hdr(&ptask->hdr, RFC2374_HDR_INTFRAG,
890 dg_size, fg_off, datagram_label);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400891 } else {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200892 fwnet_make_sf_hdr(&ptask->hdr, RFC2374_HDR_LASTFRAG,
893 dg_size, fg_off, datagram_label);
894 ptask->max_payload = skb->len + RFC2374_FRAG_HDR_SIZE;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400895 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200896 fwnet_send_packet(ptask);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400897 }
Stefan Richter110f82d2010-01-18 22:36:49 +0100898
899 if (free)
900 fwnet_free_ptask(ptask);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400901}
902
Stefan Richter7ee11fa2010-11-06 16:57:28 +0100903static void fwnet_transmit_packet_failed(struct fwnet_packet_task *ptask)
904{
905 struct fwnet_device *dev = ptask->dev;
906 unsigned long flags;
907 bool free;
908
909 spin_lock_irqsave(&dev->lock, flags);
910
911 /* One fragment failed; don't try to send remaining fragments. */
912 ptask->outstanding_pkts = 0;
913
914 /* Check whether we or the networking TX soft-IRQ is last user. */
Stefan Richter48553012010-11-06 23:18:23 +0100915 free = ptask->enqueued;
Stefan Richter7ee11fa2010-11-06 16:57:28 +0100916 if (free)
Stefan Richterb2268832010-11-14 14:35:40 +0100917 dec_queued_datagrams(dev);
Stefan Richter7ee11fa2010-11-06 16:57:28 +0100918
919 dev->netdev->stats.tx_dropped++;
920 dev->netdev->stats.tx_errors++;
921
922 spin_unlock_irqrestore(&dev->lock, flags);
923
924 if (free)
925 fwnet_free_ptask(ptask);
926}
927
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200928static void fwnet_write_complete(struct fw_card *card, int rcode,
929 void *payload, size_t length, void *data)
930{
Maxim Levitskyc4d6fd42010-11-29 04:09:53 +0200931 struct fwnet_packet_task *ptask = data;
932 static unsigned long j;
933 static int last_rcode, errors_skipped;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400934
Stefan Richter7ee11fa2010-11-06 16:57:28 +0100935 if (rcode == RCODE_COMPLETE) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200936 fwnet_transmit_packet_done(ptask);
Stefan Richter7ee11fa2010-11-06 16:57:28 +0100937 } else {
Maxim Levitskyc4d6fd42010-11-29 04:09:53 +0200938 if (printk_timed_ratelimit(&j, 1000) || rcode != last_rcode) {
Stefan Richter8408dc12012-02-19 12:48:36 +0100939 dev_err(&ptask->dev->netdev->dev,
940 "fwnet_write_complete failed: %x (skipped %d)\n",
941 rcode, errors_skipped);
Maxim Levitskyc4d6fd42010-11-29 04:09:53 +0200942
943 errors_skipped = 0;
944 last_rcode = rcode;
Stefan Richter89875832014-02-18 22:25:15 +0100945 } else {
Maxim Levitskyc4d6fd42010-11-29 04:09:53 +0200946 errors_skipped++;
Stefan Richter89875832014-02-18 22:25:15 +0100947 }
948 fwnet_transmit_packet_failed(ptask);
Stefan Richter7ee11fa2010-11-06 16:57:28 +0100949 }
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400950}
951
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200952static int fwnet_send_packet(struct fwnet_packet_task *ptask)
953{
954 struct fwnet_device *dev;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400955 unsigned tx_len;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200956 struct rfc2734_header *bufhdr;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400957 unsigned long flags;
Stefan Richter110f82d2010-01-18 22:36:49 +0100958 bool free;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400959
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200960 dev = ptask->dev;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400961 tx_len = ptask->max_payload;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200962 switch (fwnet_get_hdr_lf(&ptask->hdr)) {
963 case RFC2374_HDR_UNFRAG:
964 bufhdr = (struct rfc2734_header *)
965 skb_push(ptask->skb, RFC2374_UNFRAG_HDR_SIZE);
966 put_unaligned_be32(ptask->hdr.w0, &bufhdr->w0);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400967 break;
968
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200969 case RFC2374_HDR_FIRSTFRAG:
970 case RFC2374_HDR_INTFRAG:
971 case RFC2374_HDR_LASTFRAG:
972 bufhdr = (struct rfc2734_header *)
973 skb_push(ptask->skb, RFC2374_FRAG_HDR_SIZE);
974 put_unaligned_be32(ptask->hdr.w0, &bufhdr->w0);
975 put_unaligned_be32(ptask->hdr.w1, &bufhdr->w1);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400976 break;
977
978 default:
979 BUG();
980 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200981 if (ptask->dest_node == IEEE1394_ALL_NODES) {
982 u8 *p;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400983 int generation;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200984 int node_id;
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +0000985 unsigned int sw_version;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400986
987 /* ptask->generation may not have been set yet */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200988 generation = dev->card->generation;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400989 smp_rmb();
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200990 node_id = dev->card->node_id;
991
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +0000992 switch (ptask->skb->protocol) {
993 default:
994 sw_version = RFC2734_SW_VERSION;
995 break;
996#if IS_ENABLED(CONFIG_IPV6)
997 case htons(ETH_P_IPV6):
998 sw_version = RFC3146_SW_VERSION;
999#endif
1000 }
1001
Stephan Gatzka9d237342012-11-28 20:04:32 +01001002 p = skb_push(ptask->skb, IEEE1394_GASP_HDR_SIZE);
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001003 put_unaligned_be32(node_id << 16 | IANA_SPECIFIER_ID >> 8, p);
1004 put_unaligned_be32((IANA_SPECIFIER_ID & 0xff) << 24
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001005 | sw_version, &p[4]);
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001006
1007 /* We should not transmit if broadcast_channel.valid == 0. */
1008 fw_send_request(dev->card, &ptask->transaction,
1009 TCODE_STREAM_DATA,
1010 fw_stream_packet_destination_id(3,
1011 IEEE1394_BROADCAST_CHANNEL, 0),
1012 generation, SCODE_100, 0ULL, ptask->skb->data,
1013 tx_len + 8, 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 Richter110f82d2010-01-18 22:36:49 +01001026 goto out;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001027 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001028
1029 fw_send_request(dev->card, &ptask->transaction,
1030 TCODE_WRITE_BLOCK_REQUEST, ptask->dest_node,
1031 ptask->generation, ptask->speed, ptask->fifo_addr,
1032 ptask->skb->data, tx_len, fwnet_write_complete, ptask);
1033
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001034 spin_lock_irqsave(&dev->lock, flags);
Stefan Richter110f82d2010-01-18 22:36:49 +01001035
1036 /* If the AT tasklet already ran, we may be last user. */
Stefan Richter48553012010-11-06 23:18:23 +01001037 free = (ptask->outstanding_pkts == 0 && !ptask->enqueued);
Stefan Richter110f82d2010-01-18 22:36:49 +01001038 if (!free)
Stefan Richter48553012010-11-06 23:18:23 +01001039 ptask->enqueued = true;
1040 else
Stefan Richterb2268832010-11-14 14:35:40 +01001041 dec_queued_datagrams(dev);
Stefan Richter110f82d2010-01-18 22:36:49 +01001042
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001043 spin_unlock_irqrestore(&dev->lock, flags);
1044
Florian Westphal860e9532016-05-03 16:33:13 +02001045 netif_trans_update(dev->netdev);
Stefan Richter110f82d2010-01-18 22:36:49 +01001046 out:
1047 if (free)
1048 fwnet_free_ptask(ptask);
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001049
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001050 return 0;
1051}
1052
YOSHIFUJI Hideaki9d39c902013-03-08 10:42:26 +09001053static void fwnet_fifo_stop(struct fwnet_device *dev)
1054{
1055 if (dev->local_fifo == FWNET_NO_FIFO_ADDR)
1056 return;
1057
1058 fw_core_remove_address_handler(&dev->handler);
1059 dev->local_fifo = FWNET_NO_FIFO_ADDR;
1060}
1061
1062static int fwnet_fifo_start(struct fwnet_device *dev)
1063{
1064 int retval;
1065
1066 if (dev->local_fifo != FWNET_NO_FIFO_ADDR)
1067 return 0;
1068
1069 dev->handler.length = 4096;
1070 dev->handler.address_callback = fwnet_receive_packet;
1071 dev->handler.callback_data = dev;
1072
1073 retval = fw_core_add_address_handler(&dev->handler,
1074 &fw_high_memory_region);
1075 if (retval < 0)
1076 return retval;
1077
1078 dev->local_fifo = dev->handler.offset;
1079
1080 return 0;
1081}
1082
YOSHIFUJI Hideaki111534c2013-03-08 10:45:50 +09001083static void __fwnet_broadcast_stop(struct fwnet_device *dev)
1084{
1085 unsigned u;
1086
1087 if (dev->broadcast_state != FWNET_BROADCAST_ERROR) {
1088 for (u = 0; u < FWNET_ISO_PAGE_COUNT; u++)
1089 kunmap(dev->broadcast_rcv_buffer.pages[u]);
1090 fw_iso_buffer_destroy(&dev->broadcast_rcv_buffer, dev->card);
1091 }
1092 if (dev->broadcast_rcv_context) {
1093 fw_iso_context_destroy(dev->broadcast_rcv_context);
1094 dev->broadcast_rcv_context = NULL;
1095 }
1096 kfree(dev->broadcast_rcv_buffer_ptrs);
1097 dev->broadcast_rcv_buffer_ptrs = NULL;
1098 dev->broadcast_state = FWNET_BROADCAST_ERROR;
1099}
1100
1101static void fwnet_broadcast_stop(struct fwnet_device *dev)
1102{
1103 if (dev->broadcast_state == FWNET_BROADCAST_ERROR)
1104 return;
1105 fw_iso_context_stop(dev->broadcast_rcv_context);
1106 __fwnet_broadcast_stop(dev);
1107}
1108
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001109static int fwnet_broadcast_start(struct fwnet_device *dev)
1110{
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001111 struct fw_iso_context *context;
1112 int retval;
1113 unsigned num_packets;
1114 unsigned max_receive;
1115 struct fw_iso_packet packet;
1116 unsigned long offset;
YOSHIFUJI Hideakif2090592013-03-08 10:43:25 +09001117 void **ptrptr;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001118 unsigned u;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001119
YOSHIFUJI Hideaki2fbd8df2013-03-08 10:43:14 +09001120 if (dev->broadcast_state != FWNET_BROADCAST_ERROR)
1121 return 0;
1122
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001123 max_receive = 1U << (dev->card->max_receive + 1);
1124 num_packets = (FWNET_ISO_PAGE_COUNT * PAGE_SIZE) / max_receive;
1125
YOSHIFUJI Hideakieac31d52013-03-08 10:43:55 +09001126 ptrptr = kmalloc(sizeof(void *) * num_packets, GFP_KERNEL);
1127 if (!ptrptr) {
1128 retval = -ENOMEM;
YOSHIFUJI Hideaki111534c2013-03-08 10:45:50 +09001129 goto failed;
YOSHIFUJI Hideakieac31d52013-03-08 10:43:55 +09001130 }
1131 dev->broadcast_rcv_buffer_ptrs = ptrptr;
1132
YOSHIFUJI Hideakif2090592013-03-08 10:43:25 +09001133 context = fw_iso_context_create(dev->card, FW_ISO_CONTEXT_RECEIVE,
1134 IEEE1394_BROADCAST_CHANNEL,
1135 dev->card->link_speed, 8,
1136 fwnet_receive_broadcast, dev);
1137 if (IS_ERR(context)) {
1138 retval = PTR_ERR(context);
YOSHIFUJI Hideaki111534c2013-03-08 10:45:50 +09001139 goto failed;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001140 }
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001141
YOSHIFUJI Hideakif2090592013-03-08 10:43:25 +09001142 retval = fw_iso_buffer_init(&dev->broadcast_rcv_buffer, dev->card,
1143 FWNET_ISO_PAGE_COUNT, DMA_FROM_DEVICE);
1144 if (retval < 0)
YOSHIFUJI Hideaki111534c2013-03-08 10:45:50 +09001145 goto failed;
1146
1147 dev->broadcast_state = FWNET_BROADCAST_STOPPED;
YOSHIFUJI Hideakif2090592013-03-08 10:43:25 +09001148
YOSHIFUJI Hideakif2090592013-03-08 10:43:25 +09001149 for (u = 0; u < FWNET_ISO_PAGE_COUNT; u++) {
1150 void *ptr;
1151 unsigned v;
1152
1153 ptr = kmap(dev->broadcast_rcv_buffer.pages[u]);
1154 for (v = 0; v < num_packets / FWNET_ISO_PAGE_COUNT; v++)
1155 *ptrptr++ = (void *) ((char *)ptr + v * max_receive);
1156 }
1157 dev->broadcast_rcv_context = context;
1158
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001159 packet.payload_length = max_receive;
1160 packet.interrupt = 1;
1161 packet.skip = 0;
1162 packet.tag = 3;
1163 packet.sy = 0;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001164 packet.header_length = IEEE1394_GASP_HDR_SIZE;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001165 offset = 0;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001166
1167 for (u = 0; u < num_packets; u++) {
1168 retval = fw_iso_context_queue(context, &packet,
1169 &dev->broadcast_rcv_buffer, offset);
1170 if (retval < 0)
YOSHIFUJI Hideaki111534c2013-03-08 10:45:50 +09001171 goto failed;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001172
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001173 offset += max_receive;
1174 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001175 dev->num_broadcast_rcv_ptrs = num_packets;
1176 dev->rcv_buffer_size = max_receive;
1177 dev->broadcast_rcv_next_ptr = 0U;
1178 retval = fw_iso_context_start(context, -1, 0,
1179 FW_ISO_CONTEXT_MATCH_ALL_TAGS); /* ??? sync */
1180 if (retval < 0)
YOSHIFUJI Hideaki111534c2013-03-08 10:45:50 +09001181 goto failed;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001182
1183 /* FIXME: adjust it according to the min. speed of all known peers? */
1184 dev->broadcast_xmt_max_payload = IEEE1394_MAX_PAYLOAD_S100
1185 - IEEE1394_GASP_HDR_SIZE - RFC2374_UNFRAG_HDR_SIZE;
1186 dev->broadcast_state = FWNET_BROADCAST_RUNNING;
1187
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001188 return 0;
1189
YOSHIFUJI Hideaki111534c2013-03-08 10:45:50 +09001190 failed:
1191 __fwnet_broadcast_stop(dev);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001192 return retval;
1193}
1194
Stefan Richterc1671472010-12-17 22:22:33 +01001195static void set_carrier_state(struct fwnet_device *dev)
1196{
1197 if (dev->peer_count > 1)
1198 netif_carrier_on(dev->netdev);
1199 else
1200 netif_carrier_off(dev->netdev);
1201}
1202
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001203/* ifup */
1204static int fwnet_open(struct net_device *net)
1205{
1206 struct fwnet_device *dev = netdev_priv(net);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001207 int ret;
1208
YOSHIFUJI Hideaki2fbd8df2013-03-08 10:43:14 +09001209 ret = fwnet_broadcast_start(dev);
1210 if (ret)
YOSHIFUJI Hideaki / 吉藤英明382c4b42013-03-25 08:25:57 +00001211 return ret;
YOSHIFUJI Hideaki2fbd8df2013-03-08 10:43:14 +09001212
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001213 netif_start_queue(net);
1214
Stefan Richterc1671472010-12-17 22:22:33 +01001215 spin_lock_irq(&dev->lock);
1216 set_carrier_state(dev);
1217 spin_unlock_irq(&dev->lock);
1218
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001219 return 0;
1220}
1221
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001222/* ifdown */
1223static int fwnet_stop(struct net_device *net)
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001224{
YOSHIFUJI Hideaki8559e7f2013-03-08 10:45:57 +09001225 struct fwnet_device *dev = netdev_priv(net);
1226
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001227 netif_stop_queue(net);
YOSHIFUJI Hideaki8559e7f2013-03-08 10:45:57 +09001228 fwnet_broadcast_stop(dev);
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001229
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001230 return 0;
1231}
1232
Stephen Hemminger424efe92009-08-31 19:50:51 +00001233static netdev_tx_t fwnet_tx(struct sk_buff *skb, struct net_device *net)
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001234{
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001235 struct fwnet_header hdr_buf;
1236 struct fwnet_device *dev = netdev_priv(net);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001237 __be16 proto;
1238 u16 dest_node;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001239 unsigned max_payload;
1240 u16 dg_size;
1241 u16 *datagram_label_ptr;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001242 struct fwnet_packet_task *ptask;
Stefan Richter5a124d32009-06-14 11:45:27 +02001243 struct fwnet_peer *peer;
1244 unsigned long flags;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001245
Stefan Richterb2268832010-11-14 14:35:40 +01001246 spin_lock_irqsave(&dev->lock, flags);
1247
1248 /* Can this happen? */
1249 if (netif_queue_stopped(dev->netdev)) {
1250 spin_unlock_irqrestore(&dev->lock, flags);
1251
1252 return NETDEV_TX_BUSY;
1253 }
1254
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001255 ptask = kmem_cache_alloc(fwnet_packet_task_cache, GFP_ATOMIC);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001256 if (ptask == NULL)
1257 goto fail;
1258
1259 skb = skb_share_check(skb, GFP_ATOMIC);
1260 if (!skb)
1261 goto fail;
1262
1263 /*
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001264 * Make a copy of the driver-specific header.
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001265 * We might need to rebuild the header on tx failure.
1266 */
1267 memcpy(&hdr_buf, skb->data, sizeof(hdr_buf));
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001268 proto = hdr_buf.h_proto;
YOSHIFUJI Hideaki / 吉藤英明18406d72013-03-25 08:25:38 +00001269
1270 switch (proto) {
1271 case htons(ETH_P_ARP):
1272 case htons(ETH_P_IP):
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001273#if IS_ENABLED(CONFIG_IPV6)
1274 case htons(ETH_P_IPV6):
1275#endif
YOSHIFUJI Hideaki / 吉藤英明18406d72013-03-25 08:25:38 +00001276 break;
1277 default:
1278 goto fail;
1279 }
1280
1281 skb_pull(skb, sizeof(hdr_buf));
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001282 dg_size = skb->len;
1283
1284 /*
1285 * Set the transmission type for the packet. ARP packets and IP
1286 * broadcast packets are sent via GASP.
1287 */
YOSHIFUJI Hideaki / 吉藤英明021b97e2013-03-25 08:25:48 +00001288 if (fwnet_hwaddr_is_multicast(hdr_buf.h_dest)) {
Stefan Richter5a124d32009-06-14 11:45:27 +02001289 max_payload = dev->broadcast_xmt_max_payload;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001290 datagram_label_ptr = &dev->broadcast_xmt_datagramlabel;
1291
Stefan Richter5a124d32009-06-14 11:45:27 +02001292 ptask->fifo_addr = FWNET_NO_FIFO_ADDR;
1293 ptask->generation = 0;
1294 ptask->dest_node = IEEE1394_ALL_NODES;
1295 ptask->speed = SCODE_100;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001296 } else {
YOSHIFUJI Hideaki / 吉藤英明6752c8d2013-03-25 08:26:16 +00001297 union fwnet_hwaddr *ha = (union fwnet_hwaddr *)hdr_buf.h_dest;
1298 __be64 guid = get_unaligned(&ha->uc.uniq_id);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001299 u8 generation;
1300
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001301 peer = fwnet_peer_find_by_guid(dev, be64_to_cpu(guid));
YOSHIFUJI Hideaki / 吉藤英明6752c8d2013-03-25 08:26:16 +00001302 if (!peer)
Stefan Richterb2268832010-11-14 14:35:40 +01001303 goto fail;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001304
Stefan Richter5a124d32009-06-14 11:45:27 +02001305 generation = peer->generation;
1306 dest_node = peer->node_id;
1307 max_payload = peer->max_payload;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001308 datagram_label_ptr = &peer->datagram_label;
1309
YOSHIFUJI Hideaki / 吉藤英明6752c8d2013-03-25 08:26:16 +00001310 ptask->fifo_addr = fwnet_hwaddr_fifo(ha);
Stefan Richter5a124d32009-06-14 11:45:27 +02001311 ptask->generation = generation;
1312 ptask->dest_node = dest_node;
1313 ptask->speed = peer->speed;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001314 }
1315
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001316 ptask->hdr.w0 = 0;
1317 ptask->hdr.w1 = 0;
1318 ptask->skb = skb;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001319 ptask->dev = dev;
1320
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001321 /* Does it all fit in one packet? */
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001322 if (dg_size <= max_payload) {
1323 fwnet_make_uf_hdr(&ptask->hdr, ntohs(proto));
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001324 ptask->outstanding_pkts = 1;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001325 max_payload = dg_size + RFC2374_UNFRAG_HDR_SIZE;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001326 } else {
1327 u16 datagram_label;
1328
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001329 max_payload -= RFC2374_FRAG_OVERHEAD;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001330 datagram_label = (*datagram_label_ptr)++;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001331 fwnet_make_ff_hdr(&ptask->hdr, ntohs(proto), dg_size,
1332 datagram_label);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001333 ptask->outstanding_pkts = DIV_ROUND_UP(dg_size, max_payload);
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001334 max_payload += RFC2374_FRAG_HDR_SIZE;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001335 }
Stefan Richter5a124d32009-06-14 11:45:27 +02001336
Stefan Richterb2268832010-11-14 14:35:40 +01001337 if (++dev->queued_datagrams == FWNET_MAX_QUEUED_DATAGRAMS)
1338 netif_stop_queue(dev->netdev);
Stefan Richter48553012010-11-06 23:18:23 +01001339
Stefan Richter5a124d32009-06-14 11:45:27 +02001340 spin_unlock_irqrestore(&dev->lock, flags);
1341
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001342 ptask->max_payload = max_payload;
Stefan Richter48553012010-11-06 23:18:23 +01001343 ptask->enqueued = 0;
Stefan Richter110f82d2010-01-18 22:36:49 +01001344
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001345 fwnet_send_packet(ptask);
1346
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001347 return NETDEV_TX_OK;
1348
1349 fail:
Stefan Richterb2268832010-11-14 14:35:40 +01001350 spin_unlock_irqrestore(&dev->lock, flags);
1351
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001352 if (ptask)
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001353 kmem_cache_free(fwnet_packet_task_cache, ptask);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001354
1355 if (skb != NULL)
1356 dev_kfree_skb(skb);
1357
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001358 net->stats.tx_dropped++;
1359 net->stats.tx_errors++;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001360
1361 /*
1362 * FIXME: According to a patch from 2003-02-26, "returning non-zero
1363 * causes serious problems" here, allegedly. Before that patch,
1364 * -ERRNO was returned which is not appropriate under Linux 2.6.
1365 * Perhaps more needs to be done? Stop the queue in serious
1366 * conditions and restart it elsewhere?
1367 */
1368 return NETDEV_TX_OK;
1369}
1370
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001371static int fwnet_change_mtu(struct net_device *net, int new_mtu)
1372{
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001373 if (new_mtu < 68)
1374 return -EINVAL;
1375
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001376 net->mtu = new_mtu;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001377 return 0;
1378}
1379
Maxim Levitsky18bb36f2010-12-08 04:22:57 +02001380static const struct ethtool_ops fwnet_ethtool_ops = {
1381 .get_link = ethtool_op_get_link,
1382};
1383
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001384static const struct net_device_ops fwnet_netdev_ops = {
1385 .ndo_open = fwnet_open,
1386 .ndo_stop = fwnet_stop,
1387 .ndo_start_xmit = fwnet_tx,
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001388 .ndo_change_mtu = fwnet_change_mtu,
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001389};
1390
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001391static void fwnet_init_dev(struct net_device *net)
1392{
1393 net->header_ops = &fwnet_header_ops;
1394 net->netdev_ops = &fwnet_netdev_ops;
Stefan Richter1337f852009-06-14 11:47:44 +02001395 net->watchdog_timeo = 2 * HZ;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001396 net->flags = IFF_BROADCAST | IFF_MULTICAST;
1397 net->features = NETIF_F_HIGHDMA;
1398 net->addr_len = FWNET_ALEN;
1399 net->hard_header_len = FWNET_HLEN;
1400 net->type = ARPHRD_IEEE1394;
Stefan Richterb2268832010-11-14 14:35:40 +01001401 net->tx_queue_len = FWNET_TX_QUEUE_LEN;
Maxim Levitsky18bb36f2010-12-08 04:22:57 +02001402 net->ethtool_ops = &fwnet_ethtool_ops;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001403}
1404
Stefan Richter5a124d32009-06-14 11:45:27 +02001405/* caller must hold fwnet_device_mutex */
1406static struct fwnet_device *fwnet_dev_find(struct fw_card *card)
1407{
1408 struct fwnet_device *dev;
1409
1410 list_for_each_entry(dev, &fwnet_device_list, dev_link)
1411 if (dev->card == card)
1412 return dev;
1413
1414 return NULL;
1415}
1416
1417static int fwnet_add_peer(struct fwnet_device *dev,
1418 struct fw_unit *unit, struct fw_device *device)
1419{
1420 struct fwnet_peer *peer;
1421
1422 peer = kmalloc(sizeof(*peer), GFP_KERNEL);
1423 if (!peer)
1424 return -ENOMEM;
1425
Stefan Richterb01b4ba2009-06-16 20:43:55 +02001426 dev_set_drvdata(&unit->device, peer);
1427
Stefan Richter5a124d32009-06-14 11:45:27 +02001428 peer->dev = dev;
1429 peer->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4];
Stefan Richter5a124d32009-06-14 11:45:27 +02001430 INIT_LIST_HEAD(&peer->pd_list);
1431 peer->pdg_size = 0;
1432 peer->datagram_label = 0;
1433 peer->speed = device->max_speed;
1434 peer->max_payload = fwnet_max_payload(device->max_rec, peer->speed);
1435
1436 peer->generation = device->generation;
1437 smp_rmb();
1438 peer->node_id = device->node_id;
1439
1440 spin_lock_irq(&dev->lock);
1441 list_add_tail(&peer->peer_link, &dev->peer_list);
Maxim Levitsky18bb36f2010-12-08 04:22:57 +02001442 dev->peer_count++;
Stefan Richterc1671472010-12-17 22:22:33 +01001443 set_carrier_state(dev);
Stefan Richter5a124d32009-06-14 11:45:27 +02001444 spin_unlock_irq(&dev->lock);
1445
1446 return 0;
1447}
1448
Stefan Richter94a87152013-06-09 18:15:00 +02001449static int fwnet_probe(struct fw_unit *unit,
1450 const struct ieee1394_device_id *id)
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001451{
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001452 struct fw_device *device = fw_parent_device(unit);
1453 struct fw_card *card = device->card;
1454 struct net_device *net;
Stefan Richterb01b4ba2009-06-16 20:43:55 +02001455 bool allocated_netdev = false;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001456 struct fwnet_device *dev;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001457 unsigned max_mtu;
Stefan Richter5a124d32009-06-14 11:45:27 +02001458 int ret;
YOSHIFUJI Hideaki / 吉藤英明6752c8d2013-03-25 08:26:16 +00001459 union fwnet_hwaddr *ha;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001460
Stefan Richter5a124d32009-06-14 11:45:27 +02001461 mutex_lock(&fwnet_device_mutex);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001462
Stefan Richter5a124d32009-06-14 11:45:27 +02001463 dev = fwnet_dev_find(card);
1464 if (dev) {
Stefan Richter5a124d32009-06-14 11:45:27 +02001465 net = dev->netdev;
1466 goto have_dev;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001467 }
Stefan Richter5a124d32009-06-14 11:45:27 +02001468
Tom Gundersenc835a672014-07-14 16:37:24 +02001469 net = alloc_netdev(sizeof(*dev), "firewire%d", NET_NAME_UNKNOWN,
1470 fwnet_init_dev);
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001471 if (net == NULL) {
Daeseok Youn1118f8d2014-04-29 18:49:47 +09001472 mutex_unlock(&fwnet_device_mutex);
1473 return -ENOMEM;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001474 }
1475
Stefan Richterb01b4ba2009-06-16 20:43:55 +02001476 allocated_netdev = true;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001477 SET_NETDEV_DEV(net, card->device);
1478 dev = netdev_priv(net);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001479
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001480 spin_lock_init(&dev->lock);
1481 dev->broadcast_state = FWNET_BROADCAST_ERROR;
1482 dev->broadcast_rcv_context = NULL;
1483 dev->broadcast_xmt_max_payload = 0;
1484 dev->broadcast_xmt_datagramlabel = 0;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001485 dev->local_fifo = FWNET_NO_FIFO_ADDR;
Stefan Richter48553012010-11-06 23:18:23 +01001486 dev->queued_datagrams = 0;
Stefan Richter5a124d32009-06-14 11:45:27 +02001487 INIT_LIST_HEAD(&dev->peer_list);
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001488 dev->card = card;
Stefan Richter5a124d32009-06-14 11:45:27 +02001489 dev->netdev = net;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001490
YOSHIFUJI Hideaki / 吉藤英明382c4b42013-03-25 08:25:57 +00001491 ret = fwnet_fifo_start(dev);
1492 if (ret < 0)
1493 goto out;
1494 dev->local_fifo = dev->handler.offset;
1495
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001496 /*
1497 * Use the RFC 2734 default 1500 octets or the maximum payload
1498 * as initial MTU
1499 */
1500 max_mtu = (1 << (card->max_receive + 1))
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001501 - sizeof(struct rfc2734_header) - IEEE1394_GASP_HDR_SIZE;
1502 net->mtu = min(1500U, max_mtu);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001503
1504 /* Set our hardware address while we're at it */
YOSHIFUJI Hideaki / 吉藤英明6752c8d2013-03-25 08:26:16 +00001505 ha = (union fwnet_hwaddr *)net->dev_addr;
1506 put_unaligned_be64(card->guid, &ha->uc.uniq_id);
1507 ha->uc.max_rec = dev->card->max_receive;
1508 ha->uc.sspd = dev->card->link_speed;
1509 put_unaligned_be16(dev->local_fifo >> 32, &ha->uc.fifo_hi);
1510 put_unaligned_be32(dev->local_fifo & 0xffffffff, &ha->uc.fifo_lo);
1511
1512 memset(net->broadcast, -1, net->addr_len);
1513
Stefan Richter5a124d32009-06-14 11:45:27 +02001514 ret = register_netdev(net);
Stefan Richter8408dc12012-02-19 12:48:36 +01001515 if (ret)
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001516 goto out;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001517
Stefan Richter5a124d32009-06-14 11:45:27 +02001518 list_add_tail(&dev->dev_link, &fwnet_device_list);
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001519 dev_notice(&net->dev, "IP over IEEE 1394 on card %s\n",
Stefan Richter8408dc12012-02-19 12:48:36 +01001520 dev_name(card->device));
Stefan Richter5a124d32009-06-14 11:45:27 +02001521 have_dev:
1522 ret = fwnet_add_peer(dev, unit, device);
Stefan Richterb01b4ba2009-06-16 20:43:55 +02001523 if (ret && allocated_netdev) {
Stefan Richter5a124d32009-06-14 11:45:27 +02001524 unregister_netdev(net);
1525 list_del(&dev->dev_link);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001526 out:
YOSHIFUJI Hideaki / 吉藤英明382c4b42013-03-25 08:25:57 +00001527 fwnet_fifo_stop(dev);
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001528 free_netdev(net);
YOSHIFUJI Hideaki / 吉藤英明382c4b42013-03-25 08:25:57 +00001529 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001530
Stefan Richter5a124d32009-06-14 11:45:27 +02001531 mutex_unlock(&fwnet_device_mutex);
1532
1533 return ret;
1534}
1535
Stefan Richter94a87152013-06-09 18:15:00 +02001536/*
1537 * FIXME abort partially sent fragmented datagrams,
1538 * discard partially received fragmented datagrams
1539 */
1540static void fwnet_update(struct fw_unit *unit)
1541{
1542 struct fw_device *device = fw_parent_device(unit);
1543 struct fwnet_peer *peer = dev_get_drvdata(&unit->device);
1544 int generation;
1545
1546 generation = device->generation;
1547
1548 spin_lock_irq(&peer->dev->lock);
1549 peer->node_id = device->node_id;
1550 peer->generation = generation;
1551 spin_unlock_irq(&peer->dev->lock);
1552}
1553
Stefan Richterc1671472010-12-17 22:22:33 +01001554static void fwnet_remove_peer(struct fwnet_peer *peer, struct fwnet_device *dev)
Stefan Richter5a124d32009-06-14 11:45:27 +02001555{
1556 struct fwnet_partial_datagram *pd, *pd_next;
1557
Stefan Richterc1671472010-12-17 22:22:33 +01001558 spin_lock_irq(&dev->lock);
Stefan Richter5a124d32009-06-14 11:45:27 +02001559 list_del(&peer->peer_link);
Stefan Richterc1671472010-12-17 22:22:33 +01001560 dev->peer_count--;
1561 set_carrier_state(dev);
1562 spin_unlock_irq(&dev->lock);
Stefan Richter5a124d32009-06-14 11:45:27 +02001563
1564 list_for_each_entry_safe(pd, pd_next, &peer->pd_list, pd_link)
1565 fwnet_pd_delete(pd);
1566
1567 kfree(peer);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001568}
1569
Stefan Richter94a87152013-06-09 18:15:00 +02001570static void fwnet_remove(struct fw_unit *unit)
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001571{
Stefan Richter94a87152013-06-09 18:15:00 +02001572 struct fwnet_peer *peer = dev_get_drvdata(&unit->device);
Stefan Richter5a124d32009-06-14 11:45:27 +02001573 struct fwnet_device *dev = peer->dev;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001574 struct net_device *net;
Stefan Richter48553012010-11-06 23:18:23 +01001575 int i;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001576
Stefan Richter5a124d32009-06-14 11:45:27 +02001577 mutex_lock(&fwnet_device_mutex);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001578
Maxim Levitsky74a14502010-11-29 04:09:52 +02001579 net = dev->netdev;
Maxim Levitsky74a14502010-11-29 04:09:52 +02001580
Stefan Richterc1671472010-12-17 22:22:33 +01001581 fwnet_remove_peer(peer, dev);
Maxim Levitsky18bb36f2010-12-08 04:22:57 +02001582
Stefan Richter5a124d32009-06-14 11:45:27 +02001583 if (list_empty(&dev->peer_list)) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001584 unregister_netdev(net);
1585
YOSHIFUJI Hideaki / 吉藤英明382c4b42013-03-25 08:25:57 +00001586 fwnet_fifo_stop(dev);
1587
Stefan Richter48553012010-11-06 23:18:23 +01001588 for (i = 0; dev->queued_datagrams && i < 5; i++)
1589 ssleep(1);
1590 WARN_ON(dev->queued_datagrams);
Stefan Richterb01b4ba2009-06-16 20:43:55 +02001591 list_del(&dev->dev_link);
1592
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001593 free_netdev(net);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001594 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001595
Stefan Richter5a124d32009-06-14 11:45:27 +02001596 mutex_unlock(&fwnet_device_mutex);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001597}
1598
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001599static const struct ieee1394_device_id fwnet_id_table[] = {
1600 {
1601 .match_flags = IEEE1394_MATCH_SPECIFIER_ID |
1602 IEEE1394_MATCH_VERSION,
1603 .specifier_id = IANA_SPECIFIER_ID,
1604 .version = RFC2734_SW_VERSION,
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001605 },
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001606#if IS_ENABLED(CONFIG_IPV6)
1607 {
1608 .match_flags = IEEE1394_MATCH_SPECIFIER_ID |
1609 IEEE1394_MATCH_VERSION,
1610 .specifier_id = IANA_SPECIFIER_ID,
1611 .version = RFC3146_SW_VERSION,
1612 },
1613#endif
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001614 { }
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001615};
1616
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001617static struct fw_driver fwnet_driver = {
1618 .driver = {
1619 .owner = THIS_MODULE,
Stefan Richter59759ff2012-02-18 22:01:54 +01001620 .name = KBUILD_MODNAME,
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001621 .bus = &fw_bus_type,
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001622 },
Stefan Richter94a87152013-06-09 18:15:00 +02001623 .probe = fwnet_probe,
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001624 .update = fwnet_update,
Stefan Richter94a87152013-06-09 18:15:00 +02001625 .remove = fwnet_remove,
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001626 .id_table = fwnet_id_table,
1627};
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001628
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001629static const u32 rfc2374_unit_directory_data[] = {
1630 0x00040000, /* directory_length */
1631 0x1200005e, /* unit_specifier_id: IANA */
1632 0x81000003, /* textual descriptor offset */
1633 0x13000001, /* unit_sw_version: RFC 2734 */
1634 0x81000005, /* textual descriptor offset */
1635 0x00030000, /* descriptor_length */
1636 0x00000000, /* text */
1637 0x00000000, /* minimal ASCII, en */
1638 0x49414e41, /* I A N A */
1639 0x00030000, /* descriptor_length */
1640 0x00000000, /* text */
1641 0x00000000, /* minimal ASCII, en */
1642 0x49507634, /* I P v 4 */
1643};
1644
1645static struct fw_descriptor rfc2374_unit_directory = {
1646 .length = ARRAY_SIZE(rfc2374_unit_directory_data),
1647 .key = (CSR_DIRECTORY | CSR_UNIT) << 24,
1648 .data = rfc2374_unit_directory_data
1649};
1650
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001651#if IS_ENABLED(CONFIG_IPV6)
1652static const u32 rfc3146_unit_directory_data[] = {
1653 0x00040000, /* directory_length */
1654 0x1200005e, /* unit_specifier_id: IANA */
1655 0x81000003, /* textual descriptor offset */
1656 0x13000002, /* unit_sw_version: RFC 3146 */
1657 0x81000005, /* textual descriptor offset */
1658 0x00030000, /* descriptor_length */
1659 0x00000000, /* text */
1660 0x00000000, /* minimal ASCII, en */
1661 0x49414e41, /* I A N A */
1662 0x00030000, /* descriptor_length */
1663 0x00000000, /* text */
1664 0x00000000, /* minimal ASCII, en */
1665 0x49507636, /* I P v 6 */
1666};
1667
1668static struct fw_descriptor rfc3146_unit_directory = {
1669 .length = ARRAY_SIZE(rfc3146_unit_directory_data),
1670 .key = (CSR_DIRECTORY | CSR_UNIT) << 24,
1671 .data = rfc3146_unit_directory_data
1672};
1673#endif
1674
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001675static int __init fwnet_init(void)
1676{
1677 int err;
1678
1679 err = fw_core_add_descriptor(&rfc2374_unit_directory);
1680 if (err)
1681 return err;
1682
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001683#if IS_ENABLED(CONFIG_IPV6)
1684 err = fw_core_add_descriptor(&rfc3146_unit_directory);
1685 if (err)
1686 goto out;
1687#endif
1688
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001689 fwnet_packet_task_cache = kmem_cache_create("packet_task",
1690 sizeof(struct fwnet_packet_task), 0, 0, NULL);
1691 if (!fwnet_packet_task_cache) {
1692 err = -ENOMEM;
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001693 goto out2;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001694 }
1695
1696 err = driver_register(&fwnet_driver.driver);
1697 if (!err)
1698 return 0;
1699
1700 kmem_cache_destroy(fwnet_packet_task_cache);
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001701out2:
1702#if IS_ENABLED(CONFIG_IPV6)
1703 fw_core_remove_descriptor(&rfc3146_unit_directory);
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001704out:
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001705#endif
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001706 fw_core_remove_descriptor(&rfc2374_unit_directory);
1707
1708 return err;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001709}
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001710module_init(fwnet_init);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001711
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001712static void __exit fwnet_cleanup(void)
1713{
1714 driver_unregister(&fwnet_driver.driver);
1715 kmem_cache_destroy(fwnet_packet_task_cache);
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001716#if IS_ENABLED(CONFIG_IPV6)
1717 fw_core_remove_descriptor(&rfc3146_unit_directory);
1718#endif
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001719 fw_core_remove_descriptor(&rfc2374_unit_directory);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001720}
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001721module_exit(fwnet_cleanup);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001722
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001723MODULE_AUTHOR("Jay Fenlason <fenlason@redhat.com>");
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001724MODULE_DESCRIPTION("IP over IEEE1394 as per RFC 2734/3146");
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001725MODULE_LICENSE("GPL");
1726MODULE_DEVICE_TABLE(ieee1394, fwnet_id_table);