blob: 6b895986dc225115573add201958e60897934853 [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_rebuild(struct sk_buff *skb)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400241{
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200242 struct fwnet_header *h = (struct fwnet_header *)skb->data;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400243
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200244 if (get_unaligned_be16(&h->h_proto) == ETH_P_IP)
245 return arp_find((unsigned char *)&h->h_dest, skb);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400246
Stefan Richter8408dc12012-02-19 12:48:36 +0100247 dev_notice(&skb->dev->dev, "unable to resolve type %04x addresses\n",
248 be16_to_cpu(h->h_proto));
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400249 return 0;
250}
251
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200252static int fwnet_header_cache(const struct neighbour *neigh,
David S. Millere69dd332011-07-12 23:28:12 -0700253 struct hh_cache *hh, __be16 type)
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200254{
255 struct net_device *net;
256 struct fwnet_header *h;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400257
David S. Millere69dd332011-07-12 23:28:12 -0700258 if (type == cpu_to_be16(ETH_P_802_3))
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400259 return -1;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200260 net = neigh->dev;
YOSHIFUJI Hideaki / 吉藤英明82586342013-01-19 22:03:07 +0000261 h = (struct fwnet_header *)((u8 *)hh->hh_data + HH_DATA_OFF(sizeof(*h)));
David S. Millere69dd332011-07-12 23:28:12 -0700262 h->h_proto = type;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200263 memcpy(h->h_dest, neigh->ha, net->addr_len);
264 hh->hh_len = FWNET_HLEN;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400265
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400266 return 0;
267}
268
269/* Called by Address Resolution module to notify changes in address. */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200270static void fwnet_header_cache_update(struct hh_cache *hh,
271 const struct net_device *net, const unsigned char *haddr)
272{
YOSHIFUJI Hideaki / 吉藤英明82586342013-01-19 22:03:07 +0000273 memcpy((u8 *)hh->hh_data + HH_DATA_OFF(FWNET_HLEN), haddr, net->addr_len);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400274}
275
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200276static int fwnet_header_parse(const struct sk_buff *skb, unsigned char *haddr)
277{
278 memcpy(haddr, skb->dev->dev_addr, FWNET_ALEN);
279
280 return FWNET_ALEN;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400281}
282
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200283static const struct header_ops fwnet_header_ops = {
284 .create = fwnet_header_create,
285 .rebuild = fwnet_header_rebuild,
286 .cache = fwnet_header_cache,
287 .cache_update = fwnet_header_cache_update,
288 .parse = fwnet_header_parse,
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400289};
290
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400291/* FIXME: is this correct for all cases? */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200292static bool fwnet_frag_overlap(struct fwnet_partial_datagram *pd,
293 unsigned offset, unsigned len)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400294{
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200295 struct fwnet_fragment_info *fi;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400296 unsigned end = offset + len;
297
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200298 list_for_each_entry(fi, &pd->fi_list, fi_link)
299 if (offset < fi->offset + fi->len && end > fi->offset)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400300 return true;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200301
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400302 return false;
303}
304
305/* Assumes that new fragment does not overlap any existing fragments */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200306static struct fwnet_fragment_info *fwnet_frag_new(
307 struct fwnet_partial_datagram *pd, unsigned offset, unsigned len)
308{
309 struct fwnet_fragment_info *fi, *fi2, *new;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400310 struct list_head *list;
311
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200312 list = &pd->fi_list;
313 list_for_each_entry(fi, &pd->fi_list, fi_link) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400314 if (fi->offset + fi->len == offset) {
315 /* The new fragment can be tacked on to the end */
316 /* Did the new fragment plug a hole? */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200317 fi2 = list_entry(fi->fi_link.next,
318 struct fwnet_fragment_info, fi_link);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400319 if (fi->offset + fi->len == fi2->offset) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400320 /* glue fragments together */
321 fi->len += len + fi2->len;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200322 list_del(&fi2->fi_link);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400323 kfree(fi2);
324 } else {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400325 fi->len += len;
326 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200327
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400328 return fi;
329 }
330 if (offset + len == fi->offset) {
331 /* The new fragment can be tacked on to the beginning */
332 /* Did the new fragment plug a hole? */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200333 fi2 = list_entry(fi->fi_link.prev,
334 struct fwnet_fragment_info, fi_link);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400335 if (fi2->offset + fi2->len == fi->offset) {
336 /* glue fragments together */
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400337 fi2->len += fi->len + len;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200338 list_del(&fi->fi_link);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400339 kfree(fi);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200340
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400341 return fi2;
342 }
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400343 fi->offset = offset;
344 fi->len += len;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200345
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400346 return fi;
347 }
348 if (offset > fi->offset + fi->len) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200349 list = &fi->fi_link;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400350 break;
351 }
352 if (offset + len < fi->offset) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200353 list = fi->fi_link.prev;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400354 break;
355 }
356 }
357
358 new = kmalloc(sizeof(*new), GFP_ATOMIC);
Stefan Richtercfb0c9d2013-03-24 17:32:00 +0100359 if (!new)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400360 return NULL;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400361
362 new->offset = offset;
363 new->len = len;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200364 list_add(&new->fi_link, list);
365
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400366 return new;
367}
368
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200369static struct fwnet_partial_datagram *fwnet_pd_new(struct net_device *net,
370 struct fwnet_peer *peer, u16 datagram_label, unsigned dg_size,
371 void *frag_buf, unsigned frag_off, unsigned frag_len)
372{
373 struct fwnet_partial_datagram *new;
374 struct fwnet_fragment_info *fi;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400375
376 new = kmalloc(sizeof(*new), GFP_ATOMIC);
377 if (!new)
378 goto fail;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200379
380 INIT_LIST_HEAD(&new->fi_list);
381 fi = fwnet_frag_new(new, frag_off, frag_len);
382 if (fi == NULL)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400383 goto fail_w_new;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200384
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400385 new->datagram_label = datagram_label;
386 new->datagram_size = dg_size;
YOSHIFUJI Hideaki / 吉藤英明82586342013-01-19 22:03:07 +0000387 new->skb = dev_alloc_skb(dg_size + LL_RESERVED_SPACE(net));
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200388 if (new->skb == NULL)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400389 goto fail_w_fi;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200390
YOSHIFUJI Hideaki / 吉藤英明82586342013-01-19 22:03:07 +0000391 skb_reserve(new->skb, LL_RESERVED_SPACE(net));
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400392 new->pbuf = skb_put(new->skb, dg_size);
393 memcpy(new->pbuf + frag_off, frag_buf, frag_len);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200394 list_add_tail(&new->pd_link, &peer->pd_list);
395
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400396 return new;
397
398fail_w_fi:
399 kfree(fi);
400fail_w_new:
401 kfree(new);
402fail:
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400403 return NULL;
404}
405
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200406static struct fwnet_partial_datagram *fwnet_pd_find(struct fwnet_peer *peer,
407 u16 datagram_label)
408{
409 struct fwnet_partial_datagram *pd;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400410
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200411 list_for_each_entry(pd, &peer->pd_list, pd_link)
412 if (pd->datagram_label == datagram_label)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400413 return pd;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200414
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400415 return NULL;
416}
417
418
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200419static void fwnet_pd_delete(struct fwnet_partial_datagram *old)
420{
421 struct fwnet_fragment_info *fi, *n;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400422
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200423 list_for_each_entry_safe(fi, n, &old->fi_list, fi_link)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400424 kfree(fi);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200425
426 list_del(&old->pd_link);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400427 dev_kfree_skb_any(old->skb);
428 kfree(old);
429}
430
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200431static bool fwnet_pd_update(struct fwnet_peer *peer,
432 struct fwnet_partial_datagram *pd, void *frag_buf,
433 unsigned frag_off, unsigned frag_len)
434{
435 if (fwnet_frag_new(pd, frag_off, frag_len) == NULL)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400436 return false;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200437
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400438 memcpy(pd->pbuf + frag_off, frag_buf, frag_len);
439
440 /*
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300441 * Move list entry to beginning of list so that oldest partial
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400442 * datagrams percolate to the end of the list
443 */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200444 list_move_tail(&pd->pd_link, &peer->pd_list);
445
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400446 return true;
447}
448
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200449static bool fwnet_pd_is_complete(struct fwnet_partial_datagram *pd)
450{
451 struct fwnet_fragment_info *fi;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400452
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200453 fi = list_entry(pd->fi_list.next, struct fwnet_fragment_info, fi_link);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400454
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200455 return fi->len == pd->datagram_size;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400456}
457
Stefan Richter5a124d32009-06-14 11:45:27 +0200458/* caller must hold dev->lock */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200459static struct fwnet_peer *fwnet_peer_find_by_guid(struct fwnet_device *dev,
460 u64 guid)
461{
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200462 struct fwnet_peer *peer;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400463
Stefan Richter5a124d32009-06-14 11:45:27 +0200464 list_for_each_entry(peer, &dev->peer_list, peer_link)
465 if (peer->guid == guid)
466 return peer;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200467
Stefan Richter5a124d32009-06-14 11:45:27 +0200468 return NULL;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400469}
470
Stefan Richter5a124d32009-06-14 11:45:27 +0200471/* caller must hold dev->lock */
472static struct fwnet_peer *fwnet_peer_find_by_node_id(struct fwnet_device *dev,
473 int node_id, int generation)
474{
475 struct fwnet_peer *peer;
476
477 list_for_each_entry(peer, &dev->peer_list, peer_link)
478 if (peer->node_id == node_id &&
479 peer->generation == generation)
480 return peer;
481
482 return NULL;
483}
484
485/* See IEEE 1394-2008 table 6-4, table 8-8, table 16-18. */
486static unsigned fwnet_max_payload(unsigned max_rec, unsigned speed)
487{
488 max_rec = min(max_rec, speed + 8);
Stefan Richter4ec4a672011-09-19 00:20:48 +0200489 max_rec = clamp(max_rec, 8U, 11U); /* 512...4096 */
Stefan Richter5a124d32009-06-14 11:45:27 +0200490
491 return (1 << (max_rec + 1)) - RFC2374_FRAG_HDR_SIZE;
492}
493
494
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200495static int fwnet_finish_incoming_packet(struct net_device *net,
496 struct sk_buff *skb, u16 source_node_id,
497 bool is_broadcast, u16 ether_type)
498{
499 struct fwnet_device *dev;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400500 int status;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200501 __be64 guid;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400502
YOSHIFUJI Hideaki / 吉藤英明18406d72013-03-25 08:25:38 +0000503 switch (ether_type) {
504 case ETH_P_ARP:
505 case ETH_P_IP:
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +0000506#if IS_ENABLED(CONFIG_IPV6)
507 case ETH_P_IPV6:
508#endif
YOSHIFUJI Hideaki / 吉藤英明18406d72013-03-25 08:25:38 +0000509 break;
510 default:
511 goto err;
512 }
513
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200514 dev = netdev_priv(net);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400515 /* Write metadata, and then pass to the receive level */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200516 skb->dev = net;
YOSHIFUJI Hideaki / 吉藤英明b577d7e2013-01-19 21:43:40 +0000517 skb->ip_summed = CHECKSUM_NONE;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400518
519 /*
520 * Parse the encapsulation header. This actually does the job of
YOSHIFUJI Hideaki / 吉藤英明6752c8d2013-03-25 08:26:16 +0000521 * converting to an ethernet-like pseudo frame header.
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400522 */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200523 guid = cpu_to_be64(dev->card->guid);
524 if (dev_hard_header(skb, net, ether_type,
YOSHIFUJI Hideaki / 吉藤英明6752c8d2013-03-25 08:26:16 +0000525 is_broadcast ? net->broadcast : net->dev_addr,
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200526 NULL, skb->len) >= 0) {
527 struct fwnet_header *eth;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400528 u16 *rawp;
529 __be16 protocol;
530
531 skb_reset_mac_header(skb);
532 skb_pull(skb, sizeof(*eth));
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200533 eth = (struct fwnet_header *)skb_mac_header(skb);
YOSHIFUJI Hideaki / 吉藤英明021b97e2013-03-25 08:25:48 +0000534 if (fwnet_hwaddr_is_multicast(eth->h_dest)) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200535 if (memcmp(eth->h_dest, net->broadcast,
536 net->addr_len) == 0)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400537 skb->pkt_type = PACKET_BROADCAST;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400538#if 0
539 else
540 skb->pkt_type = PACKET_MULTICAST;
541#endif
542 } else {
Stefan Richter156ce862009-06-14 11:46:57 +0200543 if (memcmp(eth->h_dest, net->dev_addr, net->addr_len))
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400544 skb->pkt_type = PACKET_OTHERHOST;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400545 }
Simon Hormane5c5d222013-03-28 13:38:25 +0900546 if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400547 protocol = eth->h_proto;
548 } else {
549 rawp = (u16 *)skb->data;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200550 if (*rawp == 0xffff)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400551 protocol = htons(ETH_P_802_3);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200552 else
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400553 protocol = htons(ETH_P_802_2);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400554 }
555 skb->protocol = protocol;
556 }
557 status = netif_rx(skb);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200558 if (status == NET_RX_DROP) {
559 net->stats.rx_errors++;
560 net->stats.rx_dropped++;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400561 } else {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200562 net->stats.rx_packets++;
563 net->stats.rx_bytes += skb->len;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400564 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200565
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400566 return 0;
567
YOSHIFUJI Hideaki / 吉藤英明18406d72013-03-25 08:25:38 +0000568 err:
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200569 net->stats.rx_errors++;
570 net->stats.rx_dropped++;
571
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400572 dev_kfree_skb_any(skb);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200573
Stefan Richter1bf145f2010-08-16 23:45:54 +0200574 return -ENOENT;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400575}
576
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200577static int fwnet_incoming_packet(struct fwnet_device *dev, __be32 *buf, int len,
Stefan Richter5a124d32009-06-14 11:45:27 +0200578 int source_node_id, int generation,
579 bool is_broadcast)
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200580{
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400581 struct sk_buff *skb;
Stefan Richter5a124d32009-06-14 11:45:27 +0200582 struct net_device *net = dev->netdev;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200583 struct rfc2734_header hdr;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400584 unsigned lf;
585 unsigned long flags;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200586 struct fwnet_peer *peer;
587 struct fwnet_partial_datagram *pd;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400588 int fg_off;
589 int dg_size;
590 u16 datagram_label;
591 int retval;
592 u16 ether_type;
593
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200594 hdr.w0 = be32_to_cpu(buf[0]);
595 lf = fwnet_get_hdr_lf(&hdr);
596 if (lf == RFC2374_HDR_UNFRAG) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400597 /*
598 * An unfragmented datagram has been received by the ieee1394
599 * bus. Build an skbuff around it so we can pass it to the
600 * high level network layer.
601 */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200602 ether_type = fwnet_get_hdr_ether_type(&hdr);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400603 buf++;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200604 len -= RFC2374_UNFRAG_HDR_SIZE;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400605
YOSHIFUJI Hideaki / 吉藤英明82586342013-01-19 22:03:07 +0000606 skb = dev_alloc_skb(len + LL_RESERVED_SPACE(net));
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400607 if (unlikely(!skb)) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200608 net->stats.rx_dropped++;
609
Stefan Richter1bf145f2010-08-16 23:45:54 +0200610 return -ENOMEM;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400611 }
YOSHIFUJI Hideaki / 吉藤英明82586342013-01-19 22:03:07 +0000612 skb_reserve(skb, LL_RESERVED_SPACE(net));
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200613 memcpy(skb_put(skb, len), buf, len);
614
615 return fwnet_finish_incoming_packet(net, skb, source_node_id,
616 is_broadcast, ether_type);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400617 }
618 /* A datagram fragment has been received, now the fun begins. */
619 hdr.w1 = ntohl(buf[1]);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200620 buf += 2;
621 len -= RFC2374_FRAG_HDR_SIZE;
622 if (lf == RFC2374_HDR_FIRSTFRAG) {
623 ether_type = fwnet_get_hdr_ether_type(&hdr);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400624 fg_off = 0;
625 } else {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200626 ether_type = 0;
627 fg_off = fwnet_get_hdr_fg_off(&hdr);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400628 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200629 datagram_label = fwnet_get_hdr_dgl(&hdr);
630 dg_size = fwnet_get_hdr_dg_size(&hdr); /* ??? + 1 */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200631
Stefan Richter5a124d32009-06-14 11:45:27 +0200632 spin_lock_irqsave(&dev->lock, flags);
633
634 peer = fwnet_peer_find_by_node_id(dev, source_node_id, generation);
Stefan Richter1bf145f2010-08-16 23:45:54 +0200635 if (!peer) {
636 retval = -ENOENT;
637 goto fail;
638 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200639
640 pd = fwnet_pd_find(peer, datagram_label);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400641 if (pd == NULL) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200642 while (peer->pdg_size >= FWNET_MAX_FRAGMENTS) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400643 /* remove the oldest */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200644 fwnet_pd_delete(list_first_entry(&peer->pd_list,
645 struct fwnet_partial_datagram, pd_link));
646 peer->pdg_size--;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400647 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200648 pd = fwnet_pd_new(net, peer, datagram_label,
649 dg_size, buf, fg_off, len);
650 if (pd == NULL) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400651 retval = -ENOMEM;
Stefan Richter1bf145f2010-08-16 23:45:54 +0200652 goto fail;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400653 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200654 peer->pdg_size++;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400655 } else {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200656 if (fwnet_frag_overlap(pd, fg_off, len) ||
657 pd->datagram_size != dg_size) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400658 /*
659 * Differing datagram sizes or overlapping fragments,
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200660 * discard old datagram and start a new one.
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400661 */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200662 fwnet_pd_delete(pd);
663 pd = fwnet_pd_new(net, peer, datagram_label,
664 dg_size, buf, fg_off, len);
665 if (pd == NULL) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200666 peer->pdg_size--;
Stefan Richter1bf145f2010-08-16 23:45:54 +0200667 retval = -ENOMEM;
668 goto fail;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400669 }
670 } else {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200671 if (!fwnet_pd_update(peer, pd, buf, fg_off, len)) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400672 /*
673 * Couldn't save off fragment anyway
674 * so might as well obliterate the
675 * datagram now.
676 */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200677 fwnet_pd_delete(pd);
678 peer->pdg_size--;
Stefan Richter1bf145f2010-08-16 23:45:54 +0200679 retval = -ENOMEM;
680 goto fail;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400681 }
682 }
683 } /* new datagram or add to existing one */
684
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200685 if (lf == RFC2374_HDR_FIRSTFRAG)
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400686 pd->ether_type = ether_type;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200687
688 if (fwnet_pd_is_complete(pd)) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400689 ether_type = pd->ether_type;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200690 peer->pdg_size--;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400691 skb = skb_get(pd->skb);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200692 fwnet_pd_delete(pd);
693
Stefan Richter5a124d32009-06-14 11:45:27 +0200694 spin_unlock_irqrestore(&dev->lock, flags);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200695
696 return fwnet_finish_incoming_packet(net, skb, source_node_id,
697 false, ether_type);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400698 }
699 /*
700 * Datagram is not complete, we're done for the
701 * moment.
702 */
Stefan Richterb2268832010-11-14 14:35:40 +0100703 retval = 0;
Stefan Richter1bf145f2010-08-16 23:45:54 +0200704 fail:
Stefan Richter5a124d32009-06-14 11:45:27 +0200705 spin_unlock_irqrestore(&dev->lock, flags);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200706
Stefan Richter1bf145f2010-08-16 23:45:54 +0200707 return retval;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400708}
709
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200710static void fwnet_receive_packet(struct fw_card *card, struct fw_request *r,
711 int tcode, int destination, int source, int generation,
Stefan Richter33e553f2010-06-20 22:50:35 +0200712 unsigned long long offset, void *payload, size_t length,
713 void *callback_data)
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200714{
Stefan Richter00635b82009-06-16 22:35:32 +0200715 struct fwnet_device *dev = callback_data;
716 int rcode;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400717
Stefan Richter00635b82009-06-16 22:35:32 +0200718 if (destination == IEEE1394_ALL_NODES) {
719 kfree(r);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200720
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400721 return;
722 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200723
Stefan Richter00635b82009-06-16 22:35:32 +0200724 if (offset != dev->handler.offset)
725 rcode = RCODE_ADDRESS_ERROR;
726 else if (tcode != TCODE_WRITE_BLOCK_REQUEST)
727 rcode = RCODE_TYPE_ERROR;
728 else if (fwnet_incoming_packet(dev, payload, length,
729 source, generation, false) != 0) {
Stefan Richter8408dc12012-02-19 12:48:36 +0100730 dev_err(&dev->netdev->dev, "incoming packet failure\n");
Stefan Richter00635b82009-06-16 22:35:32 +0200731 rcode = RCODE_CONFLICT_ERROR;
732 } else
733 rcode = RCODE_COMPLETE;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200734
Stefan Richter00635b82009-06-16 22:35:32 +0200735 fw_send_response(card, r, rcode);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400736}
737
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200738static void fwnet_receive_broadcast(struct fw_iso_context *context,
739 u32 cycle, size_t header_length, void *header, void *data)
740{
741 struct fwnet_device *dev;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400742 struct fw_iso_packet packet;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200743 __be16 *hdr_ptr;
744 __be32 *buf_ptr;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400745 int retval;
746 u32 length;
747 u16 source_node_id;
748 u32 specifier_id;
749 u32 ver;
750 unsigned long offset;
751 unsigned long flags;
752
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200753 dev = data;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400754 hdr_ptr = header;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200755 length = be16_to_cpup(hdr_ptr);
756
757 spin_lock_irqsave(&dev->lock, flags);
758
759 offset = dev->rcv_buffer_size * dev->broadcast_rcv_next_ptr;
760 buf_ptr = dev->broadcast_rcv_buffer_ptrs[dev->broadcast_rcv_next_ptr++];
761 if (dev->broadcast_rcv_next_ptr == dev->num_broadcast_rcv_ptrs)
762 dev->broadcast_rcv_next_ptr = 0;
763
764 spin_unlock_irqrestore(&dev->lock, flags);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400765
766 specifier_id = (be32_to_cpu(buf_ptr[0]) & 0xffff) << 8
767 | (be32_to_cpu(buf_ptr[1]) & 0xff000000) >> 24;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200768 ver = be32_to_cpu(buf_ptr[1]) & 0xffffff;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400769 source_node_id = be32_to_cpu(buf_ptr[0]) >> 16;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200770
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +0000771 if (specifier_id == IANA_SPECIFIER_ID &&
772 (ver == RFC2734_SW_VERSION
773#if IS_ENABLED(CONFIG_IPV6)
774 || ver == RFC3146_SW_VERSION
775#endif
776 )) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400777 buf_ptr += 2;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200778 length -= IEEE1394_GASP_HDR_SIZE;
Stephan Gatzka9d237342012-11-28 20:04:32 +0100779 fwnet_incoming_packet(dev, buf_ptr, length, source_node_id,
780 context->card->generation, true);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200781 }
782
783 packet.payload_length = dev->rcv_buffer_size;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400784 packet.interrupt = 1;
785 packet.skip = 0;
786 packet.tag = 3;
787 packet.sy = 0;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200788 packet.header_length = IEEE1394_GASP_HDR_SIZE;
789
790 spin_lock_irqsave(&dev->lock, flags);
791
792 retval = fw_iso_context_queue(dev->broadcast_rcv_context, &packet,
793 &dev->broadcast_rcv_buffer, offset);
794
795 spin_unlock_irqrestore(&dev->lock, flags);
796
Clemens Ladisch13882a82011-05-02 09:33:56 +0200797 if (retval >= 0)
798 fw_iso_context_queue_flush(dev->broadcast_rcv_context);
799 else
Stefan Richter8408dc12012-02-19 12:48:36 +0100800 dev_err(&dev->netdev->dev, "requeue failed\n");
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400801}
802
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200803static struct kmem_cache *fwnet_packet_task_cache;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400804
Stefan Richter110f82d2010-01-18 22:36:49 +0100805static void fwnet_free_ptask(struct fwnet_packet_task *ptask)
806{
807 dev_kfree_skb_any(ptask->skb);
808 kmem_cache_free(fwnet_packet_task_cache, ptask);
809}
810
Stefan Richterb2268832010-11-14 14:35:40 +0100811/* Caller must hold dev->lock. */
812static void dec_queued_datagrams(struct fwnet_device *dev)
813{
814 if (--dev->queued_datagrams == FWNET_MIN_QUEUED_DATAGRAMS)
815 netif_wake_queue(dev->netdev);
816}
817
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200818static int fwnet_send_packet(struct fwnet_packet_task *ptask);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400819
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200820static void fwnet_transmit_packet_done(struct fwnet_packet_task *ptask)
821{
Stefan Richter110f82d2010-01-18 22:36:49 +0100822 struct fwnet_device *dev = ptask->dev;
Stefan Richter902bca02010-11-06 12:36:13 +0100823 struct sk_buff *skb = ptask->skb;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400824 unsigned long flags;
Stefan Richter110f82d2010-01-18 22:36:49 +0100825 bool free;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200826
827 spin_lock_irqsave(&dev->lock, flags);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200828
Stefan Richter110f82d2010-01-18 22:36:49 +0100829 ptask->outstanding_pkts--;
830
831 /* Check whether we or the networking TX soft-IRQ is last user. */
Stefan Richter48553012010-11-06 23:18:23 +0100832 free = (ptask->outstanding_pkts == 0 && ptask->enqueued);
Stefan Richter7ee11fa2010-11-06 16:57:28 +0100833 if (free)
Stefan Richterb2268832010-11-14 14:35:40 +0100834 dec_queued_datagrams(dev);
Stefan Richter110f82d2010-01-18 22:36:49 +0100835
Stefan Richter902bca02010-11-06 12:36:13 +0100836 if (ptask->outstanding_pkts == 0) {
Stefan Richter902bca02010-11-06 12:36:13 +0100837 dev->netdev->stats.tx_packets++;
838 dev->netdev->stats.tx_bytes += skb->len;
839 }
Stefan Richter110f82d2010-01-18 22:36:49 +0100840
841 spin_unlock_irqrestore(&dev->lock, flags);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200842
843 if (ptask->outstanding_pkts > 0) {
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400844 u16 dg_size;
845 u16 fg_off;
846 u16 datagram_label;
847 u16 lf;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400848
849 /* Update the ptask to point to the next fragment and send it */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200850 lf = fwnet_get_hdr_lf(&ptask->hdr);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400851 switch (lf) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200852 case RFC2374_HDR_LASTFRAG:
853 case RFC2374_HDR_UNFRAG:
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400854 default:
Stefan Richter8408dc12012-02-19 12:48:36 +0100855 dev_err(&dev->netdev->dev,
856 "outstanding packet %x lf %x, header %x,%x\n",
857 ptask->outstanding_pkts, lf, ptask->hdr.w0,
858 ptask->hdr.w1);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400859 BUG();
860
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200861 case RFC2374_HDR_FIRSTFRAG:
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400862 /* Set frag type here for future interior fragments */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200863 dg_size = fwnet_get_hdr_dg_size(&ptask->hdr);
864 fg_off = ptask->max_payload - RFC2374_FRAG_HDR_SIZE;
865 datagram_label = fwnet_get_hdr_dgl(&ptask->hdr);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400866 break;
867
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200868 case RFC2374_HDR_INTFRAG:
869 dg_size = fwnet_get_hdr_dg_size(&ptask->hdr);
870 fg_off = fwnet_get_hdr_fg_off(&ptask->hdr)
871 + ptask->max_payload - RFC2374_FRAG_HDR_SIZE;
872 datagram_label = fwnet_get_hdr_dgl(&ptask->hdr);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400873 break;
874 }
Stefan Richter902bca02010-11-06 12:36:13 +0100875
Stephan Gatzka9d237342012-11-28 20:04:32 +0100876 if (ptask->dest_node == IEEE1394_ALL_NODES) {
877 skb_pull(skb,
878 ptask->max_payload + IEEE1394_GASP_HDR_SIZE);
879 } else {
880 skb_pull(skb, ptask->max_payload);
881 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200882 if (ptask->outstanding_pkts > 1) {
883 fwnet_make_sf_hdr(&ptask->hdr, RFC2374_HDR_INTFRAG,
884 dg_size, fg_off, datagram_label);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400885 } else {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200886 fwnet_make_sf_hdr(&ptask->hdr, RFC2374_HDR_LASTFRAG,
887 dg_size, fg_off, datagram_label);
888 ptask->max_payload = skb->len + RFC2374_FRAG_HDR_SIZE;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400889 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200890 fwnet_send_packet(ptask);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400891 }
Stefan Richter110f82d2010-01-18 22:36:49 +0100892
893 if (free)
894 fwnet_free_ptask(ptask);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400895}
896
Stefan Richter7ee11fa2010-11-06 16:57:28 +0100897static void fwnet_transmit_packet_failed(struct fwnet_packet_task *ptask)
898{
899 struct fwnet_device *dev = ptask->dev;
900 unsigned long flags;
901 bool free;
902
903 spin_lock_irqsave(&dev->lock, flags);
904
905 /* One fragment failed; don't try to send remaining fragments. */
906 ptask->outstanding_pkts = 0;
907
908 /* Check whether we or the networking TX soft-IRQ is last user. */
Stefan Richter48553012010-11-06 23:18:23 +0100909 free = ptask->enqueued;
Stefan Richter7ee11fa2010-11-06 16:57:28 +0100910 if (free)
Stefan Richterb2268832010-11-14 14:35:40 +0100911 dec_queued_datagrams(dev);
Stefan Richter7ee11fa2010-11-06 16:57:28 +0100912
913 dev->netdev->stats.tx_dropped++;
914 dev->netdev->stats.tx_errors++;
915
916 spin_unlock_irqrestore(&dev->lock, flags);
917
918 if (free)
919 fwnet_free_ptask(ptask);
920}
921
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200922static void fwnet_write_complete(struct fw_card *card, int rcode,
923 void *payload, size_t length, void *data)
924{
Maxim Levitskyc4d6fd42010-11-29 04:09:53 +0200925 struct fwnet_packet_task *ptask = data;
926 static unsigned long j;
927 static int last_rcode, errors_skipped;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400928
Stefan Richter7ee11fa2010-11-06 16:57:28 +0100929 if (rcode == RCODE_COMPLETE) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200930 fwnet_transmit_packet_done(ptask);
Stefan Richter7ee11fa2010-11-06 16:57:28 +0100931 } else {
Stefan Richter7ee11fa2010-11-06 16:57:28 +0100932 fwnet_transmit_packet_failed(ptask);
Maxim Levitskyc4d6fd42010-11-29 04:09:53 +0200933
934 if (printk_timed_ratelimit(&j, 1000) || rcode != last_rcode) {
Stefan Richter8408dc12012-02-19 12:48:36 +0100935 dev_err(&ptask->dev->netdev->dev,
936 "fwnet_write_complete failed: %x (skipped %d)\n",
937 rcode, errors_skipped);
Maxim Levitskyc4d6fd42010-11-29 04:09:53 +0200938
939 errors_skipped = 0;
940 last_rcode = rcode;
941 } else
942 errors_skipped++;
Stefan Richter7ee11fa2010-11-06 16:57:28 +0100943 }
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400944}
945
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200946static int fwnet_send_packet(struct fwnet_packet_task *ptask)
947{
948 struct fwnet_device *dev;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400949 unsigned tx_len;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200950 struct rfc2734_header *bufhdr;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400951 unsigned long flags;
Stefan Richter110f82d2010-01-18 22:36:49 +0100952 bool free;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400953
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200954 dev = ptask->dev;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400955 tx_len = ptask->max_payload;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200956 switch (fwnet_get_hdr_lf(&ptask->hdr)) {
957 case RFC2374_HDR_UNFRAG:
958 bufhdr = (struct rfc2734_header *)
959 skb_push(ptask->skb, RFC2374_UNFRAG_HDR_SIZE);
960 put_unaligned_be32(ptask->hdr.w0, &bufhdr->w0);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400961 break;
962
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200963 case RFC2374_HDR_FIRSTFRAG:
964 case RFC2374_HDR_INTFRAG:
965 case RFC2374_HDR_LASTFRAG:
966 bufhdr = (struct rfc2734_header *)
967 skb_push(ptask->skb, RFC2374_FRAG_HDR_SIZE);
968 put_unaligned_be32(ptask->hdr.w0, &bufhdr->w0);
969 put_unaligned_be32(ptask->hdr.w1, &bufhdr->w1);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400970 break;
971
972 default:
973 BUG();
974 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200975 if (ptask->dest_node == IEEE1394_ALL_NODES) {
976 u8 *p;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400977 int generation;
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200978 int node_id;
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +0000979 unsigned int sw_version;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400980
981 /* ptask->generation may not have been set yet */
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200982 generation = dev->card->generation;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400983 smp_rmb();
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200984 node_id = dev->card->node_id;
985
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +0000986 switch (ptask->skb->protocol) {
987 default:
988 sw_version = RFC2734_SW_VERSION;
989 break;
990#if IS_ENABLED(CONFIG_IPV6)
991 case htons(ETH_P_IPV6):
992 sw_version = RFC3146_SW_VERSION;
993#endif
994 }
995
Stephan Gatzka9d237342012-11-28 20:04:32 +0100996 p = skb_push(ptask->skb, IEEE1394_GASP_HDR_SIZE);
Stefan Richterf91e3bd2009-06-07 22:57:53 +0200997 put_unaligned_be32(node_id << 16 | IANA_SPECIFIER_ID >> 8, p);
998 put_unaligned_be32((IANA_SPECIFIER_ID & 0xff) << 24
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +0000999 | sw_version, &p[4]);
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001000
1001 /* We should not transmit if broadcast_channel.valid == 0. */
1002 fw_send_request(dev->card, &ptask->transaction,
1003 TCODE_STREAM_DATA,
1004 fw_stream_packet_destination_id(3,
1005 IEEE1394_BROADCAST_CHANNEL, 0),
1006 generation, SCODE_100, 0ULL, ptask->skb->data,
1007 tx_len + 8, fwnet_write_complete, ptask);
1008
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001009 spin_lock_irqsave(&dev->lock, flags);
Stefan Richter110f82d2010-01-18 22:36:49 +01001010
1011 /* If the AT tasklet already ran, we may be last user. */
Stefan Richter48553012010-11-06 23:18:23 +01001012 free = (ptask->outstanding_pkts == 0 && !ptask->enqueued);
Stefan Richter110f82d2010-01-18 22:36:49 +01001013 if (!free)
Stefan Richter48553012010-11-06 23:18:23 +01001014 ptask->enqueued = true;
1015 else
Stefan Richterb2268832010-11-14 14:35:40 +01001016 dec_queued_datagrams(dev);
Stefan Richter110f82d2010-01-18 22:36:49 +01001017
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001018 spin_unlock_irqrestore(&dev->lock, flags);
1019
Stefan Richter110f82d2010-01-18 22:36:49 +01001020 goto out;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001021 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001022
1023 fw_send_request(dev->card, &ptask->transaction,
1024 TCODE_WRITE_BLOCK_REQUEST, ptask->dest_node,
1025 ptask->generation, ptask->speed, ptask->fifo_addr,
1026 ptask->skb->data, tx_len, fwnet_write_complete, ptask);
1027
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001028 spin_lock_irqsave(&dev->lock, flags);
Stefan Richter110f82d2010-01-18 22:36:49 +01001029
1030 /* If the AT tasklet already ran, we may be last user. */
Stefan Richter48553012010-11-06 23:18:23 +01001031 free = (ptask->outstanding_pkts == 0 && !ptask->enqueued);
Stefan Richter110f82d2010-01-18 22:36:49 +01001032 if (!free)
Stefan Richter48553012010-11-06 23:18:23 +01001033 ptask->enqueued = true;
1034 else
Stefan Richterb2268832010-11-14 14:35:40 +01001035 dec_queued_datagrams(dev);
Stefan Richter110f82d2010-01-18 22:36:49 +01001036
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001037 spin_unlock_irqrestore(&dev->lock, flags);
1038
Stefan Richter5a124d32009-06-14 11:45:27 +02001039 dev->netdev->trans_start = jiffies;
Stefan Richter110f82d2010-01-18 22:36:49 +01001040 out:
1041 if (free)
1042 fwnet_free_ptask(ptask);
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001043
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001044 return 0;
1045}
1046
YOSHIFUJI Hideaki9d39c902013-03-08 10:42:26 +09001047static void fwnet_fifo_stop(struct fwnet_device *dev)
1048{
1049 if (dev->local_fifo == FWNET_NO_FIFO_ADDR)
1050 return;
1051
1052 fw_core_remove_address_handler(&dev->handler);
1053 dev->local_fifo = FWNET_NO_FIFO_ADDR;
1054}
1055
1056static int fwnet_fifo_start(struct fwnet_device *dev)
1057{
1058 int retval;
1059
1060 if (dev->local_fifo != FWNET_NO_FIFO_ADDR)
1061 return 0;
1062
1063 dev->handler.length = 4096;
1064 dev->handler.address_callback = fwnet_receive_packet;
1065 dev->handler.callback_data = dev;
1066
1067 retval = fw_core_add_address_handler(&dev->handler,
1068 &fw_high_memory_region);
1069 if (retval < 0)
1070 return retval;
1071
1072 dev->local_fifo = dev->handler.offset;
1073
1074 return 0;
1075}
1076
YOSHIFUJI Hideaki111534c2013-03-08 10:45:50 +09001077static void __fwnet_broadcast_stop(struct fwnet_device *dev)
1078{
1079 unsigned u;
1080
1081 if (dev->broadcast_state != FWNET_BROADCAST_ERROR) {
1082 for (u = 0; u < FWNET_ISO_PAGE_COUNT; u++)
1083 kunmap(dev->broadcast_rcv_buffer.pages[u]);
1084 fw_iso_buffer_destroy(&dev->broadcast_rcv_buffer, dev->card);
1085 }
1086 if (dev->broadcast_rcv_context) {
1087 fw_iso_context_destroy(dev->broadcast_rcv_context);
1088 dev->broadcast_rcv_context = NULL;
1089 }
1090 kfree(dev->broadcast_rcv_buffer_ptrs);
1091 dev->broadcast_rcv_buffer_ptrs = NULL;
1092 dev->broadcast_state = FWNET_BROADCAST_ERROR;
1093}
1094
1095static void fwnet_broadcast_stop(struct fwnet_device *dev)
1096{
1097 if (dev->broadcast_state == FWNET_BROADCAST_ERROR)
1098 return;
1099 fw_iso_context_stop(dev->broadcast_rcv_context);
1100 __fwnet_broadcast_stop(dev);
1101}
1102
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001103static int fwnet_broadcast_start(struct fwnet_device *dev)
1104{
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001105 struct fw_iso_context *context;
1106 int retval;
1107 unsigned num_packets;
1108 unsigned max_receive;
1109 struct fw_iso_packet packet;
1110 unsigned long offset;
YOSHIFUJI Hideakif2090592013-03-08 10:43:25 +09001111 void **ptrptr;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001112 unsigned u;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001113
YOSHIFUJI Hideaki2fbd8df2013-03-08 10:43:14 +09001114 if (dev->broadcast_state != FWNET_BROADCAST_ERROR)
1115 return 0;
1116
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001117 max_receive = 1U << (dev->card->max_receive + 1);
1118 num_packets = (FWNET_ISO_PAGE_COUNT * PAGE_SIZE) / max_receive;
1119
YOSHIFUJI Hideakieac31d52013-03-08 10:43:55 +09001120 ptrptr = kmalloc(sizeof(void *) * num_packets, GFP_KERNEL);
1121 if (!ptrptr) {
1122 retval = -ENOMEM;
YOSHIFUJI Hideaki111534c2013-03-08 10:45:50 +09001123 goto failed;
YOSHIFUJI Hideakieac31d52013-03-08 10:43:55 +09001124 }
1125 dev->broadcast_rcv_buffer_ptrs = ptrptr;
1126
YOSHIFUJI Hideakif2090592013-03-08 10:43:25 +09001127 context = fw_iso_context_create(dev->card, FW_ISO_CONTEXT_RECEIVE,
1128 IEEE1394_BROADCAST_CHANNEL,
1129 dev->card->link_speed, 8,
1130 fwnet_receive_broadcast, dev);
1131 if (IS_ERR(context)) {
1132 retval = PTR_ERR(context);
YOSHIFUJI Hideaki111534c2013-03-08 10:45:50 +09001133 goto failed;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001134 }
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001135
YOSHIFUJI Hideakif2090592013-03-08 10:43:25 +09001136 retval = fw_iso_buffer_init(&dev->broadcast_rcv_buffer, dev->card,
1137 FWNET_ISO_PAGE_COUNT, DMA_FROM_DEVICE);
1138 if (retval < 0)
YOSHIFUJI Hideaki111534c2013-03-08 10:45:50 +09001139 goto failed;
1140
1141 dev->broadcast_state = FWNET_BROADCAST_STOPPED;
YOSHIFUJI Hideakif2090592013-03-08 10:43:25 +09001142
YOSHIFUJI Hideakif2090592013-03-08 10:43:25 +09001143 for (u = 0; u < FWNET_ISO_PAGE_COUNT; u++) {
1144 void *ptr;
1145 unsigned v;
1146
1147 ptr = kmap(dev->broadcast_rcv_buffer.pages[u]);
1148 for (v = 0; v < num_packets / FWNET_ISO_PAGE_COUNT; v++)
1149 *ptrptr++ = (void *) ((char *)ptr + v * max_receive);
1150 }
1151 dev->broadcast_rcv_context = context;
1152
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001153 packet.payload_length = max_receive;
1154 packet.interrupt = 1;
1155 packet.skip = 0;
1156 packet.tag = 3;
1157 packet.sy = 0;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001158 packet.header_length = IEEE1394_GASP_HDR_SIZE;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001159 offset = 0;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001160
1161 for (u = 0; u < num_packets; u++) {
1162 retval = fw_iso_context_queue(context, &packet,
1163 &dev->broadcast_rcv_buffer, offset);
1164 if (retval < 0)
YOSHIFUJI Hideaki111534c2013-03-08 10:45:50 +09001165 goto failed;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001166
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001167 offset += max_receive;
1168 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001169 dev->num_broadcast_rcv_ptrs = num_packets;
1170 dev->rcv_buffer_size = max_receive;
1171 dev->broadcast_rcv_next_ptr = 0U;
1172 retval = fw_iso_context_start(context, -1, 0,
1173 FW_ISO_CONTEXT_MATCH_ALL_TAGS); /* ??? sync */
1174 if (retval < 0)
YOSHIFUJI Hideaki111534c2013-03-08 10:45:50 +09001175 goto failed;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001176
1177 /* FIXME: adjust it according to the min. speed of all known peers? */
1178 dev->broadcast_xmt_max_payload = IEEE1394_MAX_PAYLOAD_S100
1179 - IEEE1394_GASP_HDR_SIZE - RFC2374_UNFRAG_HDR_SIZE;
1180 dev->broadcast_state = FWNET_BROADCAST_RUNNING;
1181
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001182 return 0;
1183
YOSHIFUJI Hideaki111534c2013-03-08 10:45:50 +09001184 failed:
1185 __fwnet_broadcast_stop(dev);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001186 return retval;
1187}
1188
Stefan Richterc1671472010-12-17 22:22:33 +01001189static void set_carrier_state(struct fwnet_device *dev)
1190{
1191 if (dev->peer_count > 1)
1192 netif_carrier_on(dev->netdev);
1193 else
1194 netif_carrier_off(dev->netdev);
1195}
1196
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001197/* ifup */
1198static int fwnet_open(struct net_device *net)
1199{
1200 struct fwnet_device *dev = netdev_priv(net);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001201 int ret;
1202
YOSHIFUJI Hideaki2fbd8df2013-03-08 10:43:14 +09001203 ret = fwnet_broadcast_start(dev);
1204 if (ret)
YOSHIFUJI Hideaki / 吉藤英明382c4b42013-03-25 08:25:57 +00001205 return ret;
YOSHIFUJI Hideaki2fbd8df2013-03-08 10:43:14 +09001206
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001207 netif_start_queue(net);
1208
Stefan Richterc1671472010-12-17 22:22:33 +01001209 spin_lock_irq(&dev->lock);
1210 set_carrier_state(dev);
1211 spin_unlock_irq(&dev->lock);
1212
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001213 return 0;
1214}
1215
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001216/* ifdown */
1217static int fwnet_stop(struct net_device *net)
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001218{
YOSHIFUJI Hideaki8559e7f2013-03-08 10:45:57 +09001219 struct fwnet_device *dev = netdev_priv(net);
1220
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001221 netif_stop_queue(net);
YOSHIFUJI Hideaki8559e7f2013-03-08 10:45:57 +09001222 fwnet_broadcast_stop(dev);
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001223
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001224 return 0;
1225}
1226
Stephen Hemminger424efe92009-08-31 19:50:51 +00001227static netdev_tx_t fwnet_tx(struct sk_buff *skb, struct net_device *net)
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001228{
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001229 struct fwnet_header hdr_buf;
1230 struct fwnet_device *dev = netdev_priv(net);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001231 __be16 proto;
1232 u16 dest_node;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001233 unsigned max_payload;
1234 u16 dg_size;
1235 u16 *datagram_label_ptr;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001236 struct fwnet_packet_task *ptask;
Stefan Richter5a124d32009-06-14 11:45:27 +02001237 struct fwnet_peer *peer;
1238 unsigned long flags;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001239
Stefan Richterb2268832010-11-14 14:35:40 +01001240 spin_lock_irqsave(&dev->lock, flags);
1241
1242 /* Can this happen? */
1243 if (netif_queue_stopped(dev->netdev)) {
1244 spin_unlock_irqrestore(&dev->lock, flags);
1245
1246 return NETDEV_TX_BUSY;
1247 }
1248
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001249 ptask = kmem_cache_alloc(fwnet_packet_task_cache, GFP_ATOMIC);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001250 if (ptask == NULL)
1251 goto fail;
1252
1253 skb = skb_share_check(skb, GFP_ATOMIC);
1254 if (!skb)
1255 goto fail;
1256
1257 /*
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001258 * Make a copy of the driver-specific header.
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001259 * We might need to rebuild the header on tx failure.
1260 */
1261 memcpy(&hdr_buf, skb->data, sizeof(hdr_buf));
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001262 proto = hdr_buf.h_proto;
YOSHIFUJI Hideaki / 吉藤英明18406d72013-03-25 08:25:38 +00001263
1264 switch (proto) {
1265 case htons(ETH_P_ARP):
1266 case htons(ETH_P_IP):
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001267#if IS_ENABLED(CONFIG_IPV6)
1268 case htons(ETH_P_IPV6):
1269#endif
YOSHIFUJI Hideaki / 吉藤英明18406d72013-03-25 08:25:38 +00001270 break;
1271 default:
1272 goto fail;
1273 }
1274
1275 skb_pull(skb, sizeof(hdr_buf));
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001276 dg_size = skb->len;
1277
1278 /*
1279 * Set the transmission type for the packet. ARP packets and IP
1280 * broadcast packets are sent via GASP.
1281 */
YOSHIFUJI Hideaki / 吉藤英明021b97e2013-03-25 08:25:48 +00001282 if (fwnet_hwaddr_is_multicast(hdr_buf.h_dest)) {
Stefan Richter5a124d32009-06-14 11:45:27 +02001283 max_payload = dev->broadcast_xmt_max_payload;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001284 datagram_label_ptr = &dev->broadcast_xmt_datagramlabel;
1285
Stefan Richter5a124d32009-06-14 11:45:27 +02001286 ptask->fifo_addr = FWNET_NO_FIFO_ADDR;
1287 ptask->generation = 0;
1288 ptask->dest_node = IEEE1394_ALL_NODES;
1289 ptask->speed = SCODE_100;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001290 } else {
YOSHIFUJI Hideaki / 吉藤英明6752c8d2013-03-25 08:26:16 +00001291 union fwnet_hwaddr *ha = (union fwnet_hwaddr *)hdr_buf.h_dest;
1292 __be64 guid = get_unaligned(&ha->uc.uniq_id);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001293 u8 generation;
1294
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001295 peer = fwnet_peer_find_by_guid(dev, be64_to_cpu(guid));
YOSHIFUJI Hideaki / 吉藤英明6752c8d2013-03-25 08:26:16 +00001296 if (!peer)
Stefan Richterb2268832010-11-14 14:35:40 +01001297 goto fail;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001298
Stefan Richter5a124d32009-06-14 11:45:27 +02001299 generation = peer->generation;
1300 dest_node = peer->node_id;
1301 max_payload = peer->max_payload;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001302 datagram_label_ptr = &peer->datagram_label;
1303
YOSHIFUJI Hideaki / 吉藤英明6752c8d2013-03-25 08:26:16 +00001304 ptask->fifo_addr = fwnet_hwaddr_fifo(ha);
Stefan Richter5a124d32009-06-14 11:45:27 +02001305 ptask->generation = generation;
1306 ptask->dest_node = dest_node;
1307 ptask->speed = peer->speed;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001308 }
1309
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001310 ptask->hdr.w0 = 0;
1311 ptask->hdr.w1 = 0;
1312 ptask->skb = skb;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001313 ptask->dev = dev;
1314
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001315 /* Does it all fit in one packet? */
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001316 if (dg_size <= max_payload) {
1317 fwnet_make_uf_hdr(&ptask->hdr, ntohs(proto));
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001318 ptask->outstanding_pkts = 1;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001319 max_payload = dg_size + RFC2374_UNFRAG_HDR_SIZE;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001320 } else {
1321 u16 datagram_label;
1322
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001323 max_payload -= RFC2374_FRAG_OVERHEAD;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001324 datagram_label = (*datagram_label_ptr)++;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001325 fwnet_make_ff_hdr(&ptask->hdr, ntohs(proto), dg_size,
1326 datagram_label);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001327 ptask->outstanding_pkts = DIV_ROUND_UP(dg_size, max_payload);
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001328 max_payload += RFC2374_FRAG_HDR_SIZE;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001329 }
Stefan Richter5a124d32009-06-14 11:45:27 +02001330
Stefan Richterb2268832010-11-14 14:35:40 +01001331 if (++dev->queued_datagrams == FWNET_MAX_QUEUED_DATAGRAMS)
1332 netif_stop_queue(dev->netdev);
Stefan Richter48553012010-11-06 23:18:23 +01001333
Stefan Richter5a124d32009-06-14 11:45:27 +02001334 spin_unlock_irqrestore(&dev->lock, flags);
1335
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001336 ptask->max_payload = max_payload;
Stefan Richter48553012010-11-06 23:18:23 +01001337 ptask->enqueued = 0;
Stefan Richter110f82d2010-01-18 22:36:49 +01001338
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001339 fwnet_send_packet(ptask);
1340
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001341 return NETDEV_TX_OK;
1342
1343 fail:
Stefan Richterb2268832010-11-14 14:35:40 +01001344 spin_unlock_irqrestore(&dev->lock, flags);
1345
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001346 if (ptask)
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001347 kmem_cache_free(fwnet_packet_task_cache, ptask);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001348
1349 if (skb != NULL)
1350 dev_kfree_skb(skb);
1351
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001352 net->stats.tx_dropped++;
1353 net->stats.tx_errors++;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001354
1355 /*
1356 * FIXME: According to a patch from 2003-02-26, "returning non-zero
1357 * causes serious problems" here, allegedly. Before that patch,
1358 * -ERRNO was returned which is not appropriate under Linux 2.6.
1359 * Perhaps more needs to be done? Stop the queue in serious
1360 * conditions and restart it elsewhere?
1361 */
1362 return NETDEV_TX_OK;
1363}
1364
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001365static int fwnet_change_mtu(struct net_device *net, int new_mtu)
1366{
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001367 if (new_mtu < 68)
1368 return -EINVAL;
1369
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001370 net->mtu = new_mtu;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001371 return 0;
1372}
1373
Maxim Levitsky18bb36f2010-12-08 04:22:57 +02001374static const struct ethtool_ops fwnet_ethtool_ops = {
1375 .get_link = ethtool_op_get_link,
1376};
1377
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001378static const struct net_device_ops fwnet_netdev_ops = {
1379 .ndo_open = fwnet_open,
1380 .ndo_stop = fwnet_stop,
1381 .ndo_start_xmit = fwnet_tx,
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001382 .ndo_change_mtu = fwnet_change_mtu,
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001383};
1384
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001385static void fwnet_init_dev(struct net_device *net)
1386{
1387 net->header_ops = &fwnet_header_ops;
1388 net->netdev_ops = &fwnet_netdev_ops;
Stefan Richter1337f852009-06-14 11:47:44 +02001389 net->watchdog_timeo = 2 * HZ;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001390 net->flags = IFF_BROADCAST | IFF_MULTICAST;
1391 net->features = NETIF_F_HIGHDMA;
1392 net->addr_len = FWNET_ALEN;
1393 net->hard_header_len = FWNET_HLEN;
1394 net->type = ARPHRD_IEEE1394;
Stefan Richterb2268832010-11-14 14:35:40 +01001395 net->tx_queue_len = FWNET_TX_QUEUE_LEN;
Maxim Levitsky18bb36f2010-12-08 04:22:57 +02001396 net->ethtool_ops = &fwnet_ethtool_ops;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001397}
1398
Stefan Richter5a124d32009-06-14 11:45:27 +02001399/* caller must hold fwnet_device_mutex */
1400static struct fwnet_device *fwnet_dev_find(struct fw_card *card)
1401{
1402 struct fwnet_device *dev;
1403
1404 list_for_each_entry(dev, &fwnet_device_list, dev_link)
1405 if (dev->card == card)
1406 return dev;
1407
1408 return NULL;
1409}
1410
1411static int fwnet_add_peer(struct fwnet_device *dev,
1412 struct fw_unit *unit, struct fw_device *device)
1413{
1414 struct fwnet_peer *peer;
1415
1416 peer = kmalloc(sizeof(*peer), GFP_KERNEL);
1417 if (!peer)
1418 return -ENOMEM;
1419
Stefan Richterb01b4ba2009-06-16 20:43:55 +02001420 dev_set_drvdata(&unit->device, peer);
1421
Stefan Richter5a124d32009-06-14 11:45:27 +02001422 peer->dev = dev;
1423 peer->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4];
Stefan Richter5a124d32009-06-14 11:45:27 +02001424 INIT_LIST_HEAD(&peer->pd_list);
1425 peer->pdg_size = 0;
1426 peer->datagram_label = 0;
1427 peer->speed = device->max_speed;
1428 peer->max_payload = fwnet_max_payload(device->max_rec, peer->speed);
1429
1430 peer->generation = device->generation;
1431 smp_rmb();
1432 peer->node_id = device->node_id;
1433
1434 spin_lock_irq(&dev->lock);
1435 list_add_tail(&peer->peer_link, &dev->peer_list);
Maxim Levitsky18bb36f2010-12-08 04:22:57 +02001436 dev->peer_count++;
Stefan Richterc1671472010-12-17 22:22:33 +01001437 set_carrier_state(dev);
Stefan Richter5a124d32009-06-14 11:45:27 +02001438 spin_unlock_irq(&dev->lock);
1439
1440 return 0;
1441}
1442
Stefan Richter94a87152013-06-09 18:15:00 +02001443static int fwnet_probe(struct fw_unit *unit,
1444 const struct ieee1394_device_id *id)
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001445{
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001446 struct fw_device *device = fw_parent_device(unit);
1447 struct fw_card *card = device->card;
1448 struct net_device *net;
Stefan Richterb01b4ba2009-06-16 20:43:55 +02001449 bool allocated_netdev = false;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001450 struct fwnet_device *dev;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001451 unsigned max_mtu;
Stefan Richter5a124d32009-06-14 11:45:27 +02001452 int ret;
YOSHIFUJI Hideaki / 吉藤英明6752c8d2013-03-25 08:26:16 +00001453 union fwnet_hwaddr *ha;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001454
Stefan Richter5a124d32009-06-14 11:45:27 +02001455 mutex_lock(&fwnet_device_mutex);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001456
Stefan Richter5a124d32009-06-14 11:45:27 +02001457 dev = fwnet_dev_find(card);
1458 if (dev) {
Stefan Richter5a124d32009-06-14 11:45:27 +02001459 net = dev->netdev;
1460 goto have_dev;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001461 }
Stefan Richter5a124d32009-06-14 11:45:27 +02001462
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001463 net = alloc_netdev(sizeof(*dev), "firewire%d", fwnet_init_dev);
1464 if (net == NULL) {
Stefan Richter5a124d32009-06-14 11:45:27 +02001465 ret = -ENOMEM;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001466 goto out;
1467 }
1468
Stefan Richterb01b4ba2009-06-16 20:43:55 +02001469 allocated_netdev = true;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001470 SET_NETDEV_DEV(net, card->device);
1471 dev = netdev_priv(net);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001472
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001473 spin_lock_init(&dev->lock);
1474 dev->broadcast_state = FWNET_BROADCAST_ERROR;
1475 dev->broadcast_rcv_context = NULL;
1476 dev->broadcast_xmt_max_payload = 0;
1477 dev->broadcast_xmt_datagramlabel = 0;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001478 dev->local_fifo = FWNET_NO_FIFO_ADDR;
Stefan Richter48553012010-11-06 23:18:23 +01001479 dev->queued_datagrams = 0;
Stefan Richter5a124d32009-06-14 11:45:27 +02001480 INIT_LIST_HEAD(&dev->peer_list);
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001481 dev->card = card;
Stefan Richter5a124d32009-06-14 11:45:27 +02001482 dev->netdev = net;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001483
YOSHIFUJI Hideaki / 吉藤英明382c4b42013-03-25 08:25:57 +00001484 ret = fwnet_fifo_start(dev);
1485 if (ret < 0)
1486 goto out;
1487 dev->local_fifo = dev->handler.offset;
1488
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001489 /*
1490 * Use the RFC 2734 default 1500 octets or the maximum payload
1491 * as initial MTU
1492 */
1493 max_mtu = (1 << (card->max_receive + 1))
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001494 - sizeof(struct rfc2734_header) - IEEE1394_GASP_HDR_SIZE;
1495 net->mtu = min(1500U, max_mtu);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001496
1497 /* Set our hardware address while we're at it */
YOSHIFUJI Hideaki / 吉藤英明6752c8d2013-03-25 08:26:16 +00001498 ha = (union fwnet_hwaddr *)net->dev_addr;
1499 put_unaligned_be64(card->guid, &ha->uc.uniq_id);
1500 ha->uc.max_rec = dev->card->max_receive;
1501 ha->uc.sspd = dev->card->link_speed;
1502 put_unaligned_be16(dev->local_fifo >> 32, &ha->uc.fifo_hi);
1503 put_unaligned_be32(dev->local_fifo & 0xffffffff, &ha->uc.fifo_lo);
1504
1505 memset(net->broadcast, -1, net->addr_len);
1506
Stefan Richter5a124d32009-06-14 11:45:27 +02001507 ret = register_netdev(net);
Stefan Richter8408dc12012-02-19 12:48:36 +01001508 if (ret)
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001509 goto out;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001510
Stefan Richter5a124d32009-06-14 11:45:27 +02001511 list_add_tail(&dev->dev_link, &fwnet_device_list);
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001512 dev_notice(&net->dev, "IP over IEEE 1394 on card %s\n",
Stefan Richter8408dc12012-02-19 12:48:36 +01001513 dev_name(card->device));
Stefan Richter5a124d32009-06-14 11:45:27 +02001514 have_dev:
1515 ret = fwnet_add_peer(dev, unit, device);
Stefan Richterb01b4ba2009-06-16 20:43:55 +02001516 if (ret && allocated_netdev) {
Stefan Richter5a124d32009-06-14 11:45:27 +02001517 unregister_netdev(net);
1518 list_del(&dev->dev_link);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001519 out:
YOSHIFUJI Hideaki / 吉藤英明382c4b42013-03-25 08:25:57 +00001520 fwnet_fifo_stop(dev);
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001521 free_netdev(net);
YOSHIFUJI Hideaki / 吉藤英明382c4b42013-03-25 08:25:57 +00001522 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001523
Stefan Richter5a124d32009-06-14 11:45:27 +02001524 mutex_unlock(&fwnet_device_mutex);
1525
1526 return ret;
1527}
1528
Stefan Richter94a87152013-06-09 18:15:00 +02001529/*
1530 * FIXME abort partially sent fragmented datagrams,
1531 * discard partially received fragmented datagrams
1532 */
1533static void fwnet_update(struct fw_unit *unit)
1534{
1535 struct fw_device *device = fw_parent_device(unit);
1536 struct fwnet_peer *peer = dev_get_drvdata(&unit->device);
1537 int generation;
1538
1539 generation = device->generation;
1540
1541 spin_lock_irq(&peer->dev->lock);
1542 peer->node_id = device->node_id;
1543 peer->generation = generation;
1544 spin_unlock_irq(&peer->dev->lock);
1545}
1546
Stefan Richterc1671472010-12-17 22:22:33 +01001547static void fwnet_remove_peer(struct fwnet_peer *peer, struct fwnet_device *dev)
Stefan Richter5a124d32009-06-14 11:45:27 +02001548{
1549 struct fwnet_partial_datagram *pd, *pd_next;
1550
Stefan Richterc1671472010-12-17 22:22:33 +01001551 spin_lock_irq(&dev->lock);
Stefan Richter5a124d32009-06-14 11:45:27 +02001552 list_del(&peer->peer_link);
Stefan Richterc1671472010-12-17 22:22:33 +01001553 dev->peer_count--;
1554 set_carrier_state(dev);
1555 spin_unlock_irq(&dev->lock);
Stefan Richter5a124d32009-06-14 11:45:27 +02001556
1557 list_for_each_entry_safe(pd, pd_next, &peer->pd_list, pd_link)
1558 fwnet_pd_delete(pd);
1559
1560 kfree(peer);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001561}
1562
Stefan Richter94a87152013-06-09 18:15:00 +02001563static void fwnet_remove(struct fw_unit *unit)
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001564{
Stefan Richter94a87152013-06-09 18:15:00 +02001565 struct fwnet_peer *peer = dev_get_drvdata(&unit->device);
Stefan Richter5a124d32009-06-14 11:45:27 +02001566 struct fwnet_device *dev = peer->dev;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001567 struct net_device *net;
Stefan Richter48553012010-11-06 23:18:23 +01001568 int i;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001569
Stefan Richter5a124d32009-06-14 11:45:27 +02001570 mutex_lock(&fwnet_device_mutex);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001571
Maxim Levitsky74a14502010-11-29 04:09:52 +02001572 net = dev->netdev;
Maxim Levitsky74a14502010-11-29 04:09:52 +02001573
Stefan Richterc1671472010-12-17 22:22:33 +01001574 fwnet_remove_peer(peer, dev);
Maxim Levitsky18bb36f2010-12-08 04:22:57 +02001575
Stefan Richter5a124d32009-06-14 11:45:27 +02001576 if (list_empty(&dev->peer_list)) {
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001577 unregister_netdev(net);
1578
YOSHIFUJI Hideaki / 吉藤英明382c4b42013-03-25 08:25:57 +00001579 fwnet_fifo_stop(dev);
1580
Stefan Richter48553012010-11-06 23:18:23 +01001581 for (i = 0; dev->queued_datagrams && i < 5; i++)
1582 ssleep(1);
1583 WARN_ON(dev->queued_datagrams);
Stefan Richterb01b4ba2009-06-16 20:43:55 +02001584 list_del(&dev->dev_link);
1585
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001586 free_netdev(net);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001587 }
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001588
Stefan Richter5a124d32009-06-14 11:45:27 +02001589 mutex_unlock(&fwnet_device_mutex);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001590}
1591
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001592static const struct ieee1394_device_id fwnet_id_table[] = {
1593 {
1594 .match_flags = IEEE1394_MATCH_SPECIFIER_ID |
1595 IEEE1394_MATCH_VERSION,
1596 .specifier_id = IANA_SPECIFIER_ID,
1597 .version = RFC2734_SW_VERSION,
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001598 },
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001599#if IS_ENABLED(CONFIG_IPV6)
1600 {
1601 .match_flags = IEEE1394_MATCH_SPECIFIER_ID |
1602 IEEE1394_MATCH_VERSION,
1603 .specifier_id = IANA_SPECIFIER_ID,
1604 .version = RFC3146_SW_VERSION,
1605 },
1606#endif
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001607 { }
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001608};
1609
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001610static struct fw_driver fwnet_driver = {
1611 .driver = {
1612 .owner = THIS_MODULE,
Stefan Richter59759ff2012-02-18 22:01:54 +01001613 .name = KBUILD_MODNAME,
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001614 .bus = &fw_bus_type,
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001615 },
Stefan Richter94a87152013-06-09 18:15:00 +02001616 .probe = fwnet_probe,
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001617 .update = fwnet_update,
Stefan Richter94a87152013-06-09 18:15:00 +02001618 .remove = fwnet_remove,
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001619 .id_table = fwnet_id_table,
1620};
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001621
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001622static const u32 rfc2374_unit_directory_data[] = {
1623 0x00040000, /* directory_length */
1624 0x1200005e, /* unit_specifier_id: IANA */
1625 0x81000003, /* textual descriptor offset */
1626 0x13000001, /* unit_sw_version: RFC 2734 */
1627 0x81000005, /* textual descriptor offset */
1628 0x00030000, /* descriptor_length */
1629 0x00000000, /* text */
1630 0x00000000, /* minimal ASCII, en */
1631 0x49414e41, /* I A N A */
1632 0x00030000, /* descriptor_length */
1633 0x00000000, /* text */
1634 0x00000000, /* minimal ASCII, en */
1635 0x49507634, /* I P v 4 */
1636};
1637
1638static struct fw_descriptor rfc2374_unit_directory = {
1639 .length = ARRAY_SIZE(rfc2374_unit_directory_data),
1640 .key = (CSR_DIRECTORY | CSR_UNIT) << 24,
1641 .data = rfc2374_unit_directory_data
1642};
1643
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001644#if IS_ENABLED(CONFIG_IPV6)
1645static const u32 rfc3146_unit_directory_data[] = {
1646 0x00040000, /* directory_length */
1647 0x1200005e, /* unit_specifier_id: IANA */
1648 0x81000003, /* textual descriptor offset */
1649 0x13000002, /* unit_sw_version: RFC 3146 */
1650 0x81000005, /* textual descriptor offset */
1651 0x00030000, /* descriptor_length */
1652 0x00000000, /* text */
1653 0x00000000, /* minimal ASCII, en */
1654 0x49414e41, /* I A N A */
1655 0x00030000, /* descriptor_length */
1656 0x00000000, /* text */
1657 0x00000000, /* minimal ASCII, en */
1658 0x49507636, /* I P v 6 */
1659};
1660
1661static struct fw_descriptor rfc3146_unit_directory = {
1662 .length = ARRAY_SIZE(rfc3146_unit_directory_data),
1663 .key = (CSR_DIRECTORY | CSR_UNIT) << 24,
1664 .data = rfc3146_unit_directory_data
1665};
1666#endif
1667
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001668static int __init fwnet_init(void)
1669{
1670 int err;
1671
1672 err = fw_core_add_descriptor(&rfc2374_unit_directory);
1673 if (err)
1674 return err;
1675
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001676#if IS_ENABLED(CONFIG_IPV6)
1677 err = fw_core_add_descriptor(&rfc3146_unit_directory);
1678 if (err)
1679 goto out;
1680#endif
1681
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001682 fwnet_packet_task_cache = kmem_cache_create("packet_task",
1683 sizeof(struct fwnet_packet_task), 0, 0, NULL);
1684 if (!fwnet_packet_task_cache) {
1685 err = -ENOMEM;
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001686 goto out2;
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001687 }
1688
1689 err = driver_register(&fwnet_driver.driver);
1690 if (!err)
1691 return 0;
1692
1693 kmem_cache_destroy(fwnet_packet_task_cache);
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001694out2:
1695#if IS_ENABLED(CONFIG_IPV6)
1696 fw_core_remove_descriptor(&rfc3146_unit_directory);
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001697out:
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001698#endif
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001699 fw_core_remove_descriptor(&rfc2374_unit_directory);
1700
1701 return err;
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001702}
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001703module_init(fwnet_init);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001704
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001705static void __exit fwnet_cleanup(void)
1706{
1707 driver_unregister(&fwnet_driver.driver);
1708 kmem_cache_destroy(fwnet_packet_task_cache);
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001709#if IS_ENABLED(CONFIG_IPV6)
1710 fw_core_remove_descriptor(&rfc3146_unit_directory);
1711#endif
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001712 fw_core_remove_descriptor(&rfc2374_unit_directory);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001713}
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001714module_exit(fwnet_cleanup);
Jay Fenlasonc76acec2009-05-18 13:08:06 -04001715
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001716MODULE_AUTHOR("Jay Fenlason <fenlason@redhat.com>");
YOSHIFUJI Hideaki / 吉藤英明cb6bf352013-03-25 08:26:24 +00001717MODULE_DESCRIPTION("IP over IEEE1394 as per RFC 2734/3146");
Stefan Richterf91e3bd2009-06-07 22:57:53 +02001718MODULE_LICENSE("GPL");
1719MODULE_DEVICE_TABLE(ieee1394, fwnet_id_table);