^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * IPv4 over IEEE 1394, per RFC 2734
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * IPv6 over IEEE 1394, per RFC 3146
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2009 Jay Fenlason <fenlason@redhat.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * based on eth1394 by Ben Collins et al
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/bug.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/compiler.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/ethtool.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/firewire.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/firewire-constants.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/highmem.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/in.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/ip.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/jiffies.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/mod_devicetable.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/moduleparam.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <asm/unaligned.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <net/arp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <net/firewire.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) /* rx limits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define FWNET_MAX_FRAGMENTS 30 /* arbitrary, > TX queue depth */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define FWNET_ISO_PAGE_COUNT (PAGE_SIZE < 16*1024 ? 4 : 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) /* tx limits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define FWNET_MAX_QUEUED_DATAGRAMS 20 /* < 64 = number of tlabels */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #define FWNET_MIN_QUEUED_DATAGRAMS 10 /* should keep AT DMA busy enough */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #define FWNET_TX_QUEUE_LEN FWNET_MAX_QUEUED_DATAGRAMS /* ? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #define IEEE1394_BROADCAST_CHANNEL 31
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define IEEE1394_ALL_NODES (0xffc0 | 0x003f)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define IEEE1394_MAX_PAYLOAD_S100 512
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define FWNET_NO_FIFO_ADDR (~0ULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #define IANA_SPECIFIER_ID 0x00005eU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #define RFC2734_SW_VERSION 0x000001U
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #define RFC3146_SW_VERSION 0x000002U
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #define IEEE1394_GASP_HDR_SIZE 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #define RFC2374_UNFRAG_HDR_SIZE 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #define RFC2374_FRAG_HDR_SIZE 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #define RFC2374_FRAG_OVERHEAD 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #define RFC2374_HDR_UNFRAG 0 /* unfragmented */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #define RFC2374_HDR_FIRSTFRAG 1 /* first fragment */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) #define RFC2374_HDR_LASTFRAG 2 /* last fragment */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #define RFC2374_HDR_INTFRAG 3 /* interior fragment */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) static bool fwnet_hwaddr_is_multicast(u8 *ha)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) return !!(*ha & 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) /* IPv4 and IPv6 encapsulation header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) struct rfc2734_header {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) u32 w0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) u32 w1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) #define fwnet_get_hdr_lf(h) (((h)->w0 & 0xc0000000) >> 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) #define fwnet_get_hdr_ether_type(h) (((h)->w0 & 0x0000ffff))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) #define fwnet_get_hdr_dg_size(h) ((((h)->w0 & 0x0fff0000) >> 16) + 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) #define fwnet_get_hdr_fg_off(h) (((h)->w0 & 0x00000fff))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) #define fwnet_get_hdr_dgl(h) (((h)->w1 & 0xffff0000) >> 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) #define fwnet_set_hdr_lf(lf) ((lf) << 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) #define fwnet_set_hdr_ether_type(et) (et)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) #define fwnet_set_hdr_dg_size(dgs) (((dgs) - 1) << 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) #define fwnet_set_hdr_fg_off(fgo) (fgo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) #define fwnet_set_hdr_dgl(dgl) ((dgl) << 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) static inline void fwnet_make_uf_hdr(struct rfc2734_header *hdr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) unsigned ether_type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) hdr->w0 = fwnet_set_hdr_lf(RFC2374_HDR_UNFRAG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) | fwnet_set_hdr_ether_type(ether_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) static inline void fwnet_make_ff_hdr(struct rfc2734_header *hdr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) unsigned ether_type, unsigned dg_size, unsigned dgl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) hdr->w0 = fwnet_set_hdr_lf(RFC2374_HDR_FIRSTFRAG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) | fwnet_set_hdr_dg_size(dg_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) | fwnet_set_hdr_ether_type(ether_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) hdr->w1 = fwnet_set_hdr_dgl(dgl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) static inline void fwnet_make_sf_hdr(struct rfc2734_header *hdr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) unsigned lf, unsigned dg_size, unsigned fg_off, unsigned dgl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) hdr->w0 = fwnet_set_hdr_lf(lf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) | fwnet_set_hdr_dg_size(dg_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) | fwnet_set_hdr_fg_off(fg_off);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) hdr->w1 = fwnet_set_hdr_dgl(dgl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) /* This list keeps track of what parts of the datagram have been filled in */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) struct fwnet_fragment_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) struct list_head fi_link;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) u16 offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) u16 len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) struct fwnet_partial_datagram {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) struct list_head pd_link;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) struct list_head fi_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) /* FIXME Why not use skb->data? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) char *pbuf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) u16 datagram_label;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) u16 ether_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) u16 datagram_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) static DEFINE_MUTEX(fwnet_device_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) static LIST_HEAD(fwnet_device_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) struct fwnet_device {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) struct list_head dev_link;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) spinlock_t lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) FWNET_BROADCAST_ERROR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) FWNET_BROADCAST_RUNNING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) FWNET_BROADCAST_STOPPED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) } broadcast_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) struct fw_iso_context *broadcast_rcv_context;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) struct fw_iso_buffer broadcast_rcv_buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) void **broadcast_rcv_buffer_ptrs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) unsigned broadcast_rcv_next_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) unsigned num_broadcast_rcv_ptrs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) unsigned rcv_buffer_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) * This value is the maximum unfragmented datagram size that can be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) * sent by the hardware. It already has the GASP overhead and the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) * unfragmented datagram header overhead calculated into it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) unsigned broadcast_xmt_max_payload;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) u16 broadcast_xmt_datagramlabel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) * The CSR address that remote nodes must send datagrams to for us to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) * receive them.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) struct fw_address_handler handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) u64 local_fifo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) /* Number of tx datagrams that have been queued but not yet acked */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) int queued_datagrams;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) int peer_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) struct list_head peer_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) struct fw_card *card;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) struct net_device *netdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) struct fwnet_peer {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) struct list_head peer_link;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) struct fwnet_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) u64 guid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) /* guarded by dev->lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) struct list_head pd_list; /* received partial datagrams */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) unsigned pdg_size; /* pd_list size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) u16 datagram_label; /* outgoing datagram label */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) u16 max_payload; /* includes RFC2374_FRAG_HDR_SIZE overhead */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) int node_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) int generation;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) unsigned speed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) /* This is our task struct. It's used for the packet complete callback. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) struct fwnet_packet_task {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) struct fw_transaction transaction;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) struct rfc2734_header hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) struct fwnet_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) int outstanding_pkts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) u64 fifo_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) u16 dest_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) u16 max_payload;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) u8 generation;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) u8 speed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) u8 enqueued;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) * Get fifo address embedded in hwaddr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) static __u64 fwnet_hwaddr_fifo(union fwnet_hwaddr *ha)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) return (u64)get_unaligned_be16(&ha->uc.fifo_hi) << 32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) | get_unaligned_be32(&ha->uc.fifo_lo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) * saddr == NULL means use device source address.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) * daddr == NULL means leave destination address (eg unresolved arp).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) static int fwnet_header_create(struct sk_buff *skb, struct net_device *net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) unsigned short type, const void *daddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) const void *saddr, unsigned len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) struct fwnet_header *h;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) h = skb_push(skb, sizeof(*h));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) put_unaligned_be16(type, &h->h_proto);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) if (net->flags & (IFF_LOOPBACK | IFF_NOARP)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) memset(h->h_dest, 0, net->addr_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) return net->hard_header_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) if (daddr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) memcpy(h->h_dest, daddr, net->addr_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) return net->hard_header_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) return -net->hard_header_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) static int fwnet_header_cache(const struct neighbour *neigh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) struct hh_cache *hh, __be16 type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) struct net_device *net;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) struct fwnet_header *h;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) if (type == cpu_to_be16(ETH_P_802_3))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) net = neigh->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) h = (struct fwnet_header *)((u8 *)hh->hh_data + HH_DATA_OFF(sizeof(*h)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) h->h_proto = type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) memcpy(h->h_dest, neigh->ha, net->addr_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) /* Pairs with the READ_ONCE() in neigh_resolve_output(),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) * neigh_hh_output() and neigh_update_hhs().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) smp_store_release(&hh->hh_len, FWNET_HLEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) /* Called by Address Resolution module to notify changes in address. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) static void fwnet_header_cache_update(struct hh_cache *hh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) const struct net_device *net, const unsigned char *haddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) memcpy((u8 *)hh->hh_data + HH_DATA_OFF(FWNET_HLEN), haddr, net->addr_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) static int fwnet_header_parse(const struct sk_buff *skb, unsigned char *haddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) memcpy(haddr, skb->dev->dev_addr, FWNET_ALEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) return FWNET_ALEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) static const struct header_ops fwnet_header_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) .create = fwnet_header_create,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) .cache = fwnet_header_cache,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) .cache_update = fwnet_header_cache_update,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) .parse = fwnet_header_parse,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) /* FIXME: is this correct for all cases? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) static bool fwnet_frag_overlap(struct fwnet_partial_datagram *pd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) unsigned offset, unsigned len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) struct fwnet_fragment_info *fi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) unsigned end = offset + len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) list_for_each_entry(fi, &pd->fi_list, fi_link)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) if (offset < fi->offset + fi->len && end > fi->offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) /* Assumes that new fragment does not overlap any existing fragments */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) static struct fwnet_fragment_info *fwnet_frag_new(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) struct fwnet_partial_datagram *pd, unsigned offset, unsigned len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) struct fwnet_fragment_info *fi, *fi2, *new;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) struct list_head *list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) list = &pd->fi_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) list_for_each_entry(fi, &pd->fi_list, fi_link) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) if (fi->offset + fi->len == offset) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) /* The new fragment can be tacked on to the end */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) /* Did the new fragment plug a hole? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) fi2 = list_entry(fi->fi_link.next,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) struct fwnet_fragment_info, fi_link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) if (fi->offset + fi->len == fi2->offset) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) /* glue fragments together */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) fi->len += len + fi2->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) list_del(&fi2->fi_link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) kfree(fi2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) fi->len += len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) return fi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) if (offset + len == fi->offset) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) /* The new fragment can be tacked on to the beginning */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) /* Did the new fragment plug a hole? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) fi2 = list_entry(fi->fi_link.prev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) struct fwnet_fragment_info, fi_link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) if (fi2->offset + fi2->len == fi->offset) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) /* glue fragments together */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) fi2->len += fi->len + len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) list_del(&fi->fi_link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) kfree(fi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) return fi2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) fi->offset = offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) fi->len += len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) return fi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) if (offset > fi->offset + fi->len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) list = &fi->fi_link;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) if (offset + len < fi->offset) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) list = fi->fi_link.prev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) new = kmalloc(sizeof(*new), GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) if (!new)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) new->offset = offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) new->len = len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) list_add(&new->fi_link, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) return new;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) static struct fwnet_partial_datagram *fwnet_pd_new(struct net_device *net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) struct fwnet_peer *peer, u16 datagram_label, unsigned dg_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) void *frag_buf, unsigned frag_off, unsigned frag_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) struct fwnet_partial_datagram *new;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) struct fwnet_fragment_info *fi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) new = kmalloc(sizeof(*new), GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) if (!new)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) INIT_LIST_HEAD(&new->fi_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) fi = fwnet_frag_new(new, frag_off, frag_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) if (fi == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) goto fail_w_new;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) new->datagram_label = datagram_label;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) new->datagram_size = dg_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) new->skb = dev_alloc_skb(dg_size + LL_RESERVED_SPACE(net));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) if (new->skb == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) goto fail_w_fi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) skb_reserve(new->skb, LL_RESERVED_SPACE(net));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) new->pbuf = skb_put(new->skb, dg_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) memcpy(new->pbuf + frag_off, frag_buf, frag_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) list_add_tail(&new->pd_link, &peer->pd_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) return new;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) fail_w_fi:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) kfree(fi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) fail_w_new:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) kfree(new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) static struct fwnet_partial_datagram *fwnet_pd_find(struct fwnet_peer *peer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) u16 datagram_label)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) struct fwnet_partial_datagram *pd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) list_for_each_entry(pd, &peer->pd_list, pd_link)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) if (pd->datagram_label == datagram_label)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) return pd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) static void fwnet_pd_delete(struct fwnet_partial_datagram *old)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) struct fwnet_fragment_info *fi, *n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) list_for_each_entry_safe(fi, n, &old->fi_list, fi_link)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) kfree(fi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) list_del(&old->pd_link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) dev_kfree_skb_any(old->skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) kfree(old);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) static bool fwnet_pd_update(struct fwnet_peer *peer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) struct fwnet_partial_datagram *pd, void *frag_buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) unsigned frag_off, unsigned frag_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) if (fwnet_frag_new(pd, frag_off, frag_len) == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) memcpy(pd->pbuf + frag_off, frag_buf, frag_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) * Move list entry to beginning of list so that oldest partial
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) * datagrams percolate to the end of the list
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) list_move_tail(&pd->pd_link, &peer->pd_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) static bool fwnet_pd_is_complete(struct fwnet_partial_datagram *pd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) struct fwnet_fragment_info *fi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) fi = list_entry(pd->fi_list.next, struct fwnet_fragment_info, fi_link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) return fi->len == pd->datagram_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) /* caller must hold dev->lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) static struct fwnet_peer *fwnet_peer_find_by_guid(struct fwnet_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) u64 guid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) struct fwnet_peer *peer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) list_for_each_entry(peer, &dev->peer_list, peer_link)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) if (peer->guid == guid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) return peer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) /* caller must hold dev->lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) static struct fwnet_peer *fwnet_peer_find_by_node_id(struct fwnet_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) int node_id, int generation)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) struct fwnet_peer *peer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) list_for_each_entry(peer, &dev->peer_list, peer_link)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) if (peer->node_id == node_id &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) peer->generation == generation)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) return peer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) /* See IEEE 1394-2008 table 6-4, table 8-8, table 16-18. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) static unsigned fwnet_max_payload(unsigned max_rec, unsigned speed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) max_rec = min(max_rec, speed + 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) max_rec = clamp(max_rec, 8U, 11U); /* 512...4096 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) return (1 << (max_rec + 1)) - RFC2374_FRAG_HDR_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) static int fwnet_finish_incoming_packet(struct net_device *net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) struct sk_buff *skb, u16 source_node_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) bool is_broadcast, u16 ether_type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) struct fwnet_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) __be64 guid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) switch (ether_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) case ETH_P_ARP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) case ETH_P_IP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) #if IS_ENABLED(CONFIG_IPV6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) case ETH_P_IPV6:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) dev = netdev_priv(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) /* Write metadata, and then pass to the receive level */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) skb->dev = net;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) skb->ip_summed = CHECKSUM_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) * Parse the encapsulation header. This actually does the job of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) * converting to an ethernet-like pseudo frame header.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) guid = cpu_to_be64(dev->card->guid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) if (dev_hard_header(skb, net, ether_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) is_broadcast ? net->broadcast : net->dev_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) NULL, skb->len) >= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) struct fwnet_header *eth;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) u16 *rawp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) __be16 protocol;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) skb_reset_mac_header(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) skb_pull(skb, sizeof(*eth));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) eth = (struct fwnet_header *)skb_mac_header(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) if (fwnet_hwaddr_is_multicast(eth->h_dest)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) if (memcmp(eth->h_dest, net->broadcast,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) net->addr_len) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) skb->pkt_type = PACKET_BROADCAST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) #if 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) skb->pkt_type = PACKET_MULTICAST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) if (memcmp(eth->h_dest, net->dev_addr, net->addr_len))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) skb->pkt_type = PACKET_OTHERHOST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) protocol = eth->h_proto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) rawp = (u16 *)skb->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) if (*rawp == 0xffff)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) protocol = htons(ETH_P_802_3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) protocol = htons(ETH_P_802_2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) skb->protocol = protocol;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) status = netif_rx(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) if (status == NET_RX_DROP) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) net->stats.rx_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) net->stats.rx_dropped++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) net->stats.rx_packets++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) net->stats.rx_bytes += skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) net->stats.rx_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) net->stats.rx_dropped++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) dev_kfree_skb_any(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) static int fwnet_incoming_packet(struct fwnet_device *dev, __be32 *buf, int len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) int source_node_id, int generation,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) bool is_broadcast)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) struct net_device *net = dev->netdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) struct rfc2734_header hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) unsigned lf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) struct fwnet_peer *peer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) struct fwnet_partial_datagram *pd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) int fg_off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) int dg_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) u16 datagram_label;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) u16 ether_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) if (len <= RFC2374_UNFRAG_HDR_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) hdr.w0 = be32_to_cpu(buf[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) lf = fwnet_get_hdr_lf(&hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) if (lf == RFC2374_HDR_UNFRAG) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) * An unfragmented datagram has been received by the ieee1394
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) * bus. Build an skbuff around it so we can pass it to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) * high level network layer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) ether_type = fwnet_get_hdr_ether_type(&hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) buf++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) len -= RFC2374_UNFRAG_HDR_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) skb = dev_alloc_skb(len + LL_RESERVED_SPACE(net));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) if (unlikely(!skb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) net->stats.rx_dropped++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) skb_reserve(skb, LL_RESERVED_SPACE(net));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) skb_put_data(skb, buf, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) return fwnet_finish_incoming_packet(net, skb, source_node_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) is_broadcast, ether_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) /* A datagram fragment has been received, now the fun begins. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) if (len <= RFC2374_FRAG_HDR_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) hdr.w1 = ntohl(buf[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) buf += 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) len -= RFC2374_FRAG_HDR_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) if (lf == RFC2374_HDR_FIRSTFRAG) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) ether_type = fwnet_get_hdr_ether_type(&hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) fg_off = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) ether_type = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) fg_off = fwnet_get_hdr_fg_off(&hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) datagram_label = fwnet_get_hdr_dgl(&hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) dg_size = fwnet_get_hdr_dg_size(&hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) if (fg_off + len > dg_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) spin_lock_irqsave(&dev->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) peer = fwnet_peer_find_by_node_id(dev, source_node_id, generation);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) if (!peer) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) retval = -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) pd = fwnet_pd_find(peer, datagram_label);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) if (pd == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) while (peer->pdg_size >= FWNET_MAX_FRAGMENTS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) /* remove the oldest */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) fwnet_pd_delete(list_first_entry(&peer->pd_list,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) struct fwnet_partial_datagram, pd_link));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) peer->pdg_size--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) pd = fwnet_pd_new(net, peer, datagram_label,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) dg_size, buf, fg_off, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) if (pd == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) retval = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) peer->pdg_size++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) if (fwnet_frag_overlap(pd, fg_off, len) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) pd->datagram_size != dg_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) * Differing datagram sizes or overlapping fragments,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) * discard old datagram and start a new one.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) fwnet_pd_delete(pd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) pd = fwnet_pd_new(net, peer, datagram_label,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) dg_size, buf, fg_off, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) if (pd == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) peer->pdg_size--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) retval = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) if (!fwnet_pd_update(peer, pd, buf, fg_off, len)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) * Couldn't save off fragment anyway
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) * so might as well obliterate the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) * datagram now.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) fwnet_pd_delete(pd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) peer->pdg_size--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) retval = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) } /* new datagram or add to existing one */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) if (lf == RFC2374_HDR_FIRSTFRAG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) pd->ether_type = ether_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) if (fwnet_pd_is_complete(pd)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) ether_type = pd->ether_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) peer->pdg_size--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) skb = skb_get(pd->skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) fwnet_pd_delete(pd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) spin_unlock_irqrestore(&dev->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) return fwnet_finish_incoming_packet(net, skb, source_node_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) false, ether_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) * Datagram is not complete, we're done for the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) * moment.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) retval = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) spin_unlock_irqrestore(&dev->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) static void fwnet_receive_packet(struct fw_card *card, struct fw_request *r,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) int tcode, int destination, int source, int generation,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) unsigned long long offset, void *payload, size_t length,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) void *callback_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) struct fwnet_device *dev = callback_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) int rcode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) if (destination == IEEE1394_ALL_NODES) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) kfree(r);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) if (offset != dev->handler.offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) rcode = RCODE_ADDRESS_ERROR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) else if (tcode != TCODE_WRITE_BLOCK_REQUEST)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) rcode = RCODE_TYPE_ERROR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) else if (fwnet_incoming_packet(dev, payload, length,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) source, generation, false) != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) dev_err(&dev->netdev->dev, "incoming packet failure\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) rcode = RCODE_CONFLICT_ERROR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) rcode = RCODE_COMPLETE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) fw_send_response(card, r, rcode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) static int gasp_source_id(__be32 *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) return be32_to_cpu(p[0]) >> 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) static u32 gasp_specifier_id(__be32 *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) return (be32_to_cpu(p[0]) & 0xffff) << 8 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) (be32_to_cpu(p[1]) & 0xff000000) >> 24;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) static u32 gasp_version(__be32 *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) return be32_to_cpu(p[1]) & 0xffffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) static void fwnet_receive_broadcast(struct fw_iso_context *context,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) u32 cycle, size_t header_length, void *header, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) struct fwnet_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) struct fw_iso_packet packet;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) __be16 *hdr_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) __be32 *buf_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) u32 length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) unsigned long offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) dev = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) hdr_ptr = header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) length = be16_to_cpup(hdr_ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) spin_lock_irqsave(&dev->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) offset = dev->rcv_buffer_size * dev->broadcast_rcv_next_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) buf_ptr = dev->broadcast_rcv_buffer_ptrs[dev->broadcast_rcv_next_ptr++];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) if (dev->broadcast_rcv_next_ptr == dev->num_broadcast_rcv_ptrs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) dev->broadcast_rcv_next_ptr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) spin_unlock_irqrestore(&dev->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) if (length > IEEE1394_GASP_HDR_SIZE &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) gasp_specifier_id(buf_ptr) == IANA_SPECIFIER_ID &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) (gasp_version(buf_ptr) == RFC2734_SW_VERSION
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) #if IS_ENABLED(CONFIG_IPV6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) || gasp_version(buf_ptr) == RFC3146_SW_VERSION
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) ))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) fwnet_incoming_packet(dev, buf_ptr + 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) length - IEEE1394_GASP_HDR_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) gasp_source_id(buf_ptr),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) context->card->generation, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) packet.payload_length = dev->rcv_buffer_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) packet.interrupt = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) packet.skip = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) packet.tag = 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) packet.sy = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) packet.header_length = IEEE1394_GASP_HDR_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) spin_lock_irqsave(&dev->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) retval = fw_iso_context_queue(dev->broadcast_rcv_context, &packet,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) &dev->broadcast_rcv_buffer, offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) spin_unlock_irqrestore(&dev->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) if (retval >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) fw_iso_context_queue_flush(dev->broadcast_rcv_context);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) dev_err(&dev->netdev->dev, "requeue failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) static struct kmem_cache *fwnet_packet_task_cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) static void fwnet_free_ptask(struct fwnet_packet_task *ptask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) dev_kfree_skb_any(ptask->skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) kmem_cache_free(fwnet_packet_task_cache, ptask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) /* Caller must hold dev->lock. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) static void dec_queued_datagrams(struct fwnet_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) if (--dev->queued_datagrams == FWNET_MIN_QUEUED_DATAGRAMS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) netif_wake_queue(dev->netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) static int fwnet_send_packet(struct fwnet_packet_task *ptask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) static void fwnet_transmit_packet_done(struct fwnet_packet_task *ptask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) struct fwnet_device *dev = ptask->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) struct sk_buff *skb = ptask->skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) bool free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) spin_lock_irqsave(&dev->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) ptask->outstanding_pkts--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) /* Check whether we or the networking TX soft-IRQ is last user. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) free = (ptask->outstanding_pkts == 0 && ptask->enqueued);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) if (free)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) dec_queued_datagrams(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) if (ptask->outstanding_pkts == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) dev->netdev->stats.tx_packets++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) dev->netdev->stats.tx_bytes += skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) spin_unlock_irqrestore(&dev->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) if (ptask->outstanding_pkts > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) u16 dg_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) u16 fg_off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) u16 datagram_label;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) u16 lf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) /* Update the ptask to point to the next fragment and send it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) lf = fwnet_get_hdr_lf(&ptask->hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) switch (lf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) case RFC2374_HDR_LASTFRAG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) case RFC2374_HDR_UNFRAG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) dev_err(&dev->netdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) "outstanding packet %x lf %x, header %x,%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) ptask->outstanding_pkts, lf, ptask->hdr.w0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) ptask->hdr.w1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) BUG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) case RFC2374_HDR_FIRSTFRAG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) /* Set frag type here for future interior fragments */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) dg_size = fwnet_get_hdr_dg_size(&ptask->hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) fg_off = ptask->max_payload - RFC2374_FRAG_HDR_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) datagram_label = fwnet_get_hdr_dgl(&ptask->hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) case RFC2374_HDR_INTFRAG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) dg_size = fwnet_get_hdr_dg_size(&ptask->hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) fg_off = fwnet_get_hdr_fg_off(&ptask->hdr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) + ptask->max_payload - RFC2374_FRAG_HDR_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) datagram_label = fwnet_get_hdr_dgl(&ptask->hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) if (ptask->dest_node == IEEE1394_ALL_NODES) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) skb_pull(skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) ptask->max_payload + IEEE1394_GASP_HDR_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) skb_pull(skb, ptask->max_payload);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) if (ptask->outstanding_pkts > 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) fwnet_make_sf_hdr(&ptask->hdr, RFC2374_HDR_INTFRAG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) dg_size, fg_off, datagram_label);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) fwnet_make_sf_hdr(&ptask->hdr, RFC2374_HDR_LASTFRAG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) dg_size, fg_off, datagram_label);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) ptask->max_payload = skb->len + RFC2374_FRAG_HDR_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) fwnet_send_packet(ptask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) if (free)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) fwnet_free_ptask(ptask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) static void fwnet_transmit_packet_failed(struct fwnet_packet_task *ptask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) struct fwnet_device *dev = ptask->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) bool free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) spin_lock_irqsave(&dev->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) /* One fragment failed; don't try to send remaining fragments. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) ptask->outstanding_pkts = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) /* Check whether we or the networking TX soft-IRQ is last user. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) free = ptask->enqueued;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) if (free)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) dec_queued_datagrams(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) dev->netdev->stats.tx_dropped++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) dev->netdev->stats.tx_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) spin_unlock_irqrestore(&dev->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) if (free)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) fwnet_free_ptask(ptask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) static void fwnet_write_complete(struct fw_card *card, int rcode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) void *payload, size_t length, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) struct fwnet_packet_task *ptask = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) static unsigned long j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) static int last_rcode, errors_skipped;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) if (rcode == RCODE_COMPLETE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) fwnet_transmit_packet_done(ptask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) if (printk_timed_ratelimit(&j, 1000) || rcode != last_rcode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) dev_err(&ptask->dev->netdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) "fwnet_write_complete failed: %x (skipped %d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) rcode, errors_skipped);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) errors_skipped = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) last_rcode = rcode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) errors_skipped++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) fwnet_transmit_packet_failed(ptask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) static int fwnet_send_packet(struct fwnet_packet_task *ptask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) struct fwnet_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) unsigned tx_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) struct rfc2734_header *bufhdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) bool free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) dev = ptask->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) tx_len = ptask->max_payload;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) switch (fwnet_get_hdr_lf(&ptask->hdr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) case RFC2374_HDR_UNFRAG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) bufhdr = skb_push(ptask->skb, RFC2374_UNFRAG_HDR_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) put_unaligned_be32(ptask->hdr.w0, &bufhdr->w0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) case RFC2374_HDR_FIRSTFRAG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) case RFC2374_HDR_INTFRAG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) case RFC2374_HDR_LASTFRAG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) bufhdr = skb_push(ptask->skb, RFC2374_FRAG_HDR_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) put_unaligned_be32(ptask->hdr.w0, &bufhdr->w0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) put_unaligned_be32(ptask->hdr.w1, &bufhdr->w1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) BUG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) if (ptask->dest_node == IEEE1394_ALL_NODES) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) u8 *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) int generation;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) int node_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) unsigned int sw_version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) /* ptask->generation may not have been set yet */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) generation = dev->card->generation;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) smp_rmb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) node_id = dev->card->node_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) switch (ptask->skb->protocol) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) sw_version = RFC2734_SW_VERSION;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) #if IS_ENABLED(CONFIG_IPV6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) case htons(ETH_P_IPV6):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) sw_version = RFC3146_SW_VERSION;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) p = skb_push(ptask->skb, IEEE1394_GASP_HDR_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) put_unaligned_be32(node_id << 16 | IANA_SPECIFIER_ID >> 8, p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) put_unaligned_be32((IANA_SPECIFIER_ID & 0xff) << 24
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) | sw_version, &p[4]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) /* We should not transmit if broadcast_channel.valid == 0. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) fw_send_request(dev->card, &ptask->transaction,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) TCODE_STREAM_DATA,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) fw_stream_packet_destination_id(3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) IEEE1394_BROADCAST_CHANNEL, 0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) generation, SCODE_100, 0ULL, ptask->skb->data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) tx_len + 8, fwnet_write_complete, ptask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) spin_lock_irqsave(&dev->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) /* If the AT tasklet already ran, we may be last user. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) free = (ptask->outstanding_pkts == 0 && !ptask->enqueued);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) if (!free)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) ptask->enqueued = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) dec_queued_datagrams(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) spin_unlock_irqrestore(&dev->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) fw_send_request(dev->card, &ptask->transaction,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) TCODE_WRITE_BLOCK_REQUEST, ptask->dest_node,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) ptask->generation, ptask->speed, ptask->fifo_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) ptask->skb->data, tx_len, fwnet_write_complete, ptask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) spin_lock_irqsave(&dev->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) /* If the AT tasklet already ran, we may be last user. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) free = (ptask->outstanding_pkts == 0 && !ptask->enqueued);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) if (!free)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) ptask->enqueued = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) dec_queued_datagrams(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) spin_unlock_irqrestore(&dev->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) netif_trans_update(dev->netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) if (free)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) fwnet_free_ptask(ptask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) static void fwnet_fifo_stop(struct fwnet_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) if (dev->local_fifo == FWNET_NO_FIFO_ADDR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) fw_core_remove_address_handler(&dev->handler);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) dev->local_fifo = FWNET_NO_FIFO_ADDR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) static int fwnet_fifo_start(struct fwnet_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) if (dev->local_fifo != FWNET_NO_FIFO_ADDR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) dev->handler.length = 4096;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) dev->handler.address_callback = fwnet_receive_packet;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) dev->handler.callback_data = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) retval = fw_core_add_address_handler(&dev->handler,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) &fw_high_memory_region);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) if (retval < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) dev->local_fifo = dev->handler.offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) static void __fwnet_broadcast_stop(struct fwnet_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) unsigned u;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) if (dev->broadcast_state != FWNET_BROADCAST_ERROR) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) for (u = 0; u < FWNET_ISO_PAGE_COUNT; u++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) kunmap(dev->broadcast_rcv_buffer.pages[u]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) fw_iso_buffer_destroy(&dev->broadcast_rcv_buffer, dev->card);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) if (dev->broadcast_rcv_context) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) fw_iso_context_destroy(dev->broadcast_rcv_context);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) dev->broadcast_rcv_context = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) kfree(dev->broadcast_rcv_buffer_ptrs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) dev->broadcast_rcv_buffer_ptrs = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) dev->broadcast_state = FWNET_BROADCAST_ERROR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) static void fwnet_broadcast_stop(struct fwnet_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) if (dev->broadcast_state == FWNET_BROADCAST_ERROR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) fw_iso_context_stop(dev->broadcast_rcv_context);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) __fwnet_broadcast_stop(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) static int fwnet_broadcast_start(struct fwnet_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) struct fw_iso_context *context;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) unsigned num_packets;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) unsigned max_receive;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) struct fw_iso_packet packet;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) unsigned long offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) void **ptrptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) unsigned u;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) if (dev->broadcast_state != FWNET_BROADCAST_ERROR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) max_receive = 1U << (dev->card->max_receive + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) num_packets = (FWNET_ISO_PAGE_COUNT * PAGE_SIZE) / max_receive;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) ptrptr = kmalloc_array(num_packets, sizeof(void *), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) if (!ptrptr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) retval = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) dev->broadcast_rcv_buffer_ptrs = ptrptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) context = fw_iso_context_create(dev->card, FW_ISO_CONTEXT_RECEIVE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) IEEE1394_BROADCAST_CHANNEL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) dev->card->link_speed, 8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) fwnet_receive_broadcast, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) if (IS_ERR(context)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) retval = PTR_ERR(context);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) retval = fw_iso_buffer_init(&dev->broadcast_rcv_buffer, dev->card,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) FWNET_ISO_PAGE_COUNT, DMA_FROM_DEVICE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) if (retval < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) dev->broadcast_state = FWNET_BROADCAST_STOPPED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) for (u = 0; u < FWNET_ISO_PAGE_COUNT; u++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) void *ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) unsigned v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) ptr = kmap(dev->broadcast_rcv_buffer.pages[u]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) for (v = 0; v < num_packets / FWNET_ISO_PAGE_COUNT; v++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) *ptrptr++ = (void *) ((char *)ptr + v * max_receive);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) dev->broadcast_rcv_context = context;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) packet.payload_length = max_receive;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) packet.interrupt = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) packet.skip = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) packet.tag = 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) packet.sy = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) packet.header_length = IEEE1394_GASP_HDR_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) offset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) for (u = 0; u < num_packets; u++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) retval = fw_iso_context_queue(context, &packet,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) &dev->broadcast_rcv_buffer, offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) if (retval < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176) offset += max_receive;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178) dev->num_broadcast_rcv_ptrs = num_packets;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179) dev->rcv_buffer_size = max_receive;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) dev->broadcast_rcv_next_ptr = 0U;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181) retval = fw_iso_context_start(context, -1, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) FW_ISO_CONTEXT_MATCH_ALL_TAGS); /* ??? sync */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) if (retval < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186) /* FIXME: adjust it according to the min. speed of all known peers? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) dev->broadcast_xmt_max_payload = IEEE1394_MAX_PAYLOAD_S100
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) - IEEE1394_GASP_HDR_SIZE - RFC2374_UNFRAG_HDR_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) dev->broadcast_state = FWNET_BROADCAST_RUNNING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) failed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) __fwnet_broadcast_stop(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) static void set_carrier_state(struct fwnet_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200) if (dev->peer_count > 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201) netif_carrier_on(dev->netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) netif_carrier_off(dev->netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) /* ifup */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207) static int fwnet_open(struct net_device *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209) struct fwnet_device *dev = netdev_priv(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212) ret = fwnet_broadcast_start(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216) netif_start_queue(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218) spin_lock_irq(&dev->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219) set_carrier_state(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220) spin_unlock_irq(&dev->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225) /* ifdown */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226) static int fwnet_stop(struct net_device *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228) struct fwnet_device *dev = netdev_priv(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230) netif_stop_queue(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231) fwnet_broadcast_stop(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236) static netdev_tx_t fwnet_tx(struct sk_buff *skb, struct net_device *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) struct fwnet_header hdr_buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) struct fwnet_device *dev = netdev_priv(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240) __be16 proto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) u16 dest_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242) unsigned max_payload;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) u16 dg_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244) u16 *datagram_label_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) struct fwnet_packet_task *ptask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246) struct fwnet_peer *peer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) spin_lock_irqsave(&dev->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251) /* Can this happen? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252) if (netif_queue_stopped(dev->netdev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253) spin_unlock_irqrestore(&dev->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255) return NETDEV_TX_BUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258) ptask = kmem_cache_alloc(fwnet_packet_task_cache, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259) if (ptask == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) skb = skb_share_check(skb, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267) * Make a copy of the driver-specific header.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268) * We might need to rebuild the header on tx failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270) memcpy(&hdr_buf, skb->data, sizeof(hdr_buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271) proto = hdr_buf.h_proto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273) switch (proto) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274) case htons(ETH_P_ARP):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275) case htons(ETH_P_IP):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276) #if IS_ENABLED(CONFIG_IPV6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277) case htons(ETH_P_IPV6):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284) skb_pull(skb, sizeof(hdr_buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285) dg_size = skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288) * Set the transmission type for the packet. ARP packets and IP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289) * broadcast packets are sent via GASP.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291) if (fwnet_hwaddr_is_multicast(hdr_buf.h_dest)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292) max_payload = dev->broadcast_xmt_max_payload;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293) datagram_label_ptr = &dev->broadcast_xmt_datagramlabel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295) ptask->fifo_addr = FWNET_NO_FIFO_ADDR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296) ptask->generation = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297) ptask->dest_node = IEEE1394_ALL_NODES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298) ptask->speed = SCODE_100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300) union fwnet_hwaddr *ha = (union fwnet_hwaddr *)hdr_buf.h_dest;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301) __be64 guid = get_unaligned(&ha->uc.uniq_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302) u8 generation;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304) peer = fwnet_peer_find_by_guid(dev, be64_to_cpu(guid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305) if (!peer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308) generation = peer->generation;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309) dest_node = peer->node_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310) max_payload = peer->max_payload;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311) datagram_label_ptr = &peer->datagram_label;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313) ptask->fifo_addr = fwnet_hwaddr_fifo(ha);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314) ptask->generation = generation;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315) ptask->dest_node = dest_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316) ptask->speed = peer->speed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319) ptask->hdr.w0 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320) ptask->hdr.w1 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321) ptask->skb = skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322) ptask->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324) /* Does it all fit in one packet? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325) if (dg_size <= max_payload) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326) fwnet_make_uf_hdr(&ptask->hdr, ntohs(proto));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1327) ptask->outstanding_pkts = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1328) max_payload = dg_size + RFC2374_UNFRAG_HDR_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1329) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1330) u16 datagram_label;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1331)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1332) max_payload -= RFC2374_FRAG_OVERHEAD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1333) datagram_label = (*datagram_label_ptr)++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1334) fwnet_make_ff_hdr(&ptask->hdr, ntohs(proto), dg_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1335) datagram_label);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1336) ptask->outstanding_pkts = DIV_ROUND_UP(dg_size, max_payload);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1337) max_payload += RFC2374_FRAG_HDR_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1338) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1340) if (++dev->queued_datagrams == FWNET_MAX_QUEUED_DATAGRAMS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1341) netif_stop_queue(dev->netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1342)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1343) spin_unlock_irqrestore(&dev->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1345) ptask->max_payload = max_payload;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1346) ptask->enqueued = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1348) fwnet_send_packet(ptask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1350) return NETDEV_TX_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1352) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1353) spin_unlock_irqrestore(&dev->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1354)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1355) if (ptask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1356) kmem_cache_free(fwnet_packet_task_cache, ptask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1358) if (skb != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1359) dev_kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1360)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1361) net->stats.tx_dropped++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1362) net->stats.tx_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1363)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1364) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1365) * FIXME: According to a patch from 2003-02-26, "returning non-zero
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1366) * causes serious problems" here, allegedly. Before that patch,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1367) * -ERRNO was returned which is not appropriate under Linux 2.6.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1368) * Perhaps more needs to be done? Stop the queue in serious
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1369) * conditions and restart it elsewhere?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1370) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1371) return NETDEV_TX_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1372) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1373)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1374) static const struct ethtool_ops fwnet_ethtool_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1375) .get_link = ethtool_op_get_link,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1376) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1378) static const struct net_device_ops fwnet_netdev_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1379) .ndo_open = fwnet_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1380) .ndo_stop = fwnet_stop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1381) .ndo_start_xmit = fwnet_tx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1382) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1384) static void fwnet_init_dev(struct net_device *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1385) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1386) net->header_ops = &fwnet_header_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1387) net->netdev_ops = &fwnet_netdev_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1388) net->watchdog_timeo = 2 * HZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1389) net->flags = IFF_BROADCAST | IFF_MULTICAST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1390) net->features = NETIF_F_HIGHDMA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1391) net->addr_len = FWNET_ALEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1392) net->hard_header_len = FWNET_HLEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1393) net->type = ARPHRD_IEEE1394;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1394) net->tx_queue_len = FWNET_TX_QUEUE_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1395) net->ethtool_ops = &fwnet_ethtool_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1396) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1397)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1398) /* caller must hold fwnet_device_mutex */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1399) static struct fwnet_device *fwnet_dev_find(struct fw_card *card)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1400) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1401) struct fwnet_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1403) list_for_each_entry(dev, &fwnet_device_list, dev_link)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1404) if (dev->card == card)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1405) return dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1406)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1407) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1408) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1409)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1410) static int fwnet_add_peer(struct fwnet_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1411) struct fw_unit *unit, struct fw_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1412) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1413) struct fwnet_peer *peer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1414)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1415) peer = kmalloc(sizeof(*peer), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1416) if (!peer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1417) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1418)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1419) dev_set_drvdata(&unit->device, peer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1420)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1421) peer->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1422) peer->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1423) INIT_LIST_HEAD(&peer->pd_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1424) peer->pdg_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1425) peer->datagram_label = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1426) peer->speed = device->max_speed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1427) peer->max_payload = fwnet_max_payload(device->max_rec, peer->speed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1428)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1429) peer->generation = device->generation;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1430) smp_rmb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1431) peer->node_id = device->node_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1432)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1433) spin_lock_irq(&dev->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1434) list_add_tail(&peer->peer_link, &dev->peer_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1435) dev->peer_count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1436) set_carrier_state(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1437) spin_unlock_irq(&dev->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1438)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1439) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1440) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1441)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1442) static int fwnet_probe(struct fw_unit *unit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1443) const struct ieee1394_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1444) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1445) struct fw_device *device = fw_parent_device(unit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1446) struct fw_card *card = device->card;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1447) struct net_device *net;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1448) bool allocated_netdev = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1449) struct fwnet_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1450) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1451) union fwnet_hwaddr *ha;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1452)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1453) mutex_lock(&fwnet_device_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1455) dev = fwnet_dev_find(card);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1456) if (dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1457) net = dev->netdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1458) goto have_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1459) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1461) net = alloc_netdev(sizeof(*dev), "firewire%d", NET_NAME_UNKNOWN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1462) fwnet_init_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1463) if (net == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1464) mutex_unlock(&fwnet_device_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1465) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1466) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1467)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1468) allocated_netdev = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1469) SET_NETDEV_DEV(net, card->device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1470) dev = netdev_priv(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1471)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1472) spin_lock_init(&dev->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1473) dev->broadcast_state = FWNET_BROADCAST_ERROR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1474) dev->broadcast_rcv_context = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1475) dev->broadcast_xmt_max_payload = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1476) dev->broadcast_xmt_datagramlabel = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1477) dev->local_fifo = FWNET_NO_FIFO_ADDR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1478) dev->queued_datagrams = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1479) INIT_LIST_HEAD(&dev->peer_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1480) dev->card = card;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1481) dev->netdev = net;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1482)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1483) ret = fwnet_fifo_start(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1484) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1485) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1486) dev->local_fifo = dev->handler.offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1487)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1488) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1489) * default MTU: RFC 2734 cl. 4, RFC 3146 cl. 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1490) * maximum MTU: RFC 2734 cl. 4.2, fragment encapsulation header's
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1491) * maximum possible datagram_size + 1 = 0xfff + 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1492) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1493) net->mtu = 1500U;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1494) net->min_mtu = ETH_MIN_MTU;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1495) net->max_mtu = 4096U;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1496)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1497) /* Set our hardware address while we're at it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1498) ha = (union fwnet_hwaddr *)net->dev_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1499) put_unaligned_be64(card->guid, &ha->uc.uniq_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1500) ha->uc.max_rec = dev->card->max_receive;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1501) ha->uc.sspd = dev->card->link_speed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1502) put_unaligned_be16(dev->local_fifo >> 32, &ha->uc.fifo_hi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1503) put_unaligned_be32(dev->local_fifo & 0xffffffff, &ha->uc.fifo_lo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1504)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1505) memset(net->broadcast, -1, net->addr_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1506)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1507) ret = register_netdev(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1508) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1509) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1510)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1511) list_add_tail(&dev->dev_link, &fwnet_device_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1512) dev_notice(&net->dev, "IP over IEEE 1394 on card %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1513) dev_name(card->device));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1514) have_dev:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1515) ret = fwnet_add_peer(dev, unit, device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1516) if (ret && allocated_netdev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1517) unregister_netdev(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1518) list_del(&dev->dev_link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1519) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1520) fwnet_fifo_stop(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1521) free_netdev(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1522) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1523)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1524) mutex_unlock(&fwnet_device_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1525)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1526) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1527) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1528)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1529) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1530) * FIXME abort partially sent fragmented datagrams,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1531) * discard partially received fragmented datagrams
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1532) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1533) static void fwnet_update(struct fw_unit *unit)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1534) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1535) struct fw_device *device = fw_parent_device(unit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1536) struct fwnet_peer *peer = dev_get_drvdata(&unit->device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1537) int generation;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1538)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1539) generation = device->generation;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1540)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1541) spin_lock_irq(&peer->dev->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1542) peer->node_id = device->node_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1543) peer->generation = generation;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1544) spin_unlock_irq(&peer->dev->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1545) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1546)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1547) static void fwnet_remove_peer(struct fwnet_peer *peer, struct fwnet_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1548) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1549) struct fwnet_partial_datagram *pd, *pd_next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1550)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1551) spin_lock_irq(&dev->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1552) list_del(&peer->peer_link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1553) dev->peer_count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1554) set_carrier_state(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1555) spin_unlock_irq(&dev->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1556)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1557) list_for_each_entry_safe(pd, pd_next, &peer->pd_list, pd_link)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1558) fwnet_pd_delete(pd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1560) kfree(peer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1561) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1562)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1563) static void fwnet_remove(struct fw_unit *unit)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1564) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1565) struct fwnet_peer *peer = dev_get_drvdata(&unit->device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1566) struct fwnet_device *dev = peer->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1567) struct net_device *net;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1568) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1569)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1570) mutex_lock(&fwnet_device_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1571)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1572) net = dev->netdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1573)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1574) fwnet_remove_peer(peer, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1575)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1576) if (list_empty(&dev->peer_list)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1577) unregister_netdev(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1578)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1579) fwnet_fifo_stop(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1580)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1581) for (i = 0; dev->queued_datagrams && i < 5; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1582) ssleep(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1583) WARN_ON(dev->queued_datagrams);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1584) list_del(&dev->dev_link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1585)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1586) free_netdev(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1587) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1588)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1589) mutex_unlock(&fwnet_device_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1590) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1591)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1592) static const struct ieee1394_device_id fwnet_id_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1593) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1594) .match_flags = IEEE1394_MATCH_SPECIFIER_ID |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1595) IEEE1394_MATCH_VERSION,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1596) .specifier_id = IANA_SPECIFIER_ID,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1597) .version = RFC2734_SW_VERSION,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1598) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1599) #if IS_ENABLED(CONFIG_IPV6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1600) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1601) .match_flags = IEEE1394_MATCH_SPECIFIER_ID |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1602) IEEE1394_MATCH_VERSION,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1603) .specifier_id = IANA_SPECIFIER_ID,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1604) .version = RFC3146_SW_VERSION,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1605) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1606) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1607) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1608) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1609)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1610) static struct fw_driver fwnet_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1611) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1612) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1613) .name = KBUILD_MODNAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1614) .bus = &fw_bus_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1615) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1616) .probe = fwnet_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1617) .update = fwnet_update,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1618) .remove = fwnet_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1619) .id_table = fwnet_id_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1620) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1621)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1622) static const u32 rfc2374_unit_directory_data[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1623) 0x00040000, /* directory_length */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1624) 0x1200005e, /* unit_specifier_id: IANA */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1625) 0x81000003, /* textual descriptor offset */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1626) 0x13000001, /* unit_sw_version: RFC 2734 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1627) 0x81000005, /* textual descriptor offset */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1628) 0x00030000, /* descriptor_length */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1629) 0x00000000, /* text */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1630) 0x00000000, /* minimal ASCII, en */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1631) 0x49414e41, /* I A N A */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1632) 0x00030000, /* descriptor_length */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1633) 0x00000000, /* text */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1634) 0x00000000, /* minimal ASCII, en */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1635) 0x49507634, /* I P v 4 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1636) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1637)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1638) static struct fw_descriptor rfc2374_unit_directory = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1639) .length = ARRAY_SIZE(rfc2374_unit_directory_data),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1640) .key = (CSR_DIRECTORY | CSR_UNIT) << 24,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1641) .data = rfc2374_unit_directory_data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1642) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1643)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1644) #if IS_ENABLED(CONFIG_IPV6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1645) static const u32 rfc3146_unit_directory_data[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1646) 0x00040000, /* directory_length */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1647) 0x1200005e, /* unit_specifier_id: IANA */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1648) 0x81000003, /* textual descriptor offset */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1649) 0x13000002, /* unit_sw_version: RFC 3146 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1650) 0x81000005, /* textual descriptor offset */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1651) 0x00030000, /* descriptor_length */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1652) 0x00000000, /* text */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1653) 0x00000000, /* minimal ASCII, en */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1654) 0x49414e41, /* I A N A */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1655) 0x00030000, /* descriptor_length */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1656) 0x00000000, /* text */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1657) 0x00000000, /* minimal ASCII, en */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1658) 0x49507636, /* I P v 6 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1659) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1660)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1661) static struct fw_descriptor rfc3146_unit_directory = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1662) .length = ARRAY_SIZE(rfc3146_unit_directory_data),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1663) .key = (CSR_DIRECTORY | CSR_UNIT) << 24,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1664) .data = rfc3146_unit_directory_data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1665) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1666) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1667)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1668) static int __init fwnet_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1669) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1670) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1671)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1672) err = fw_core_add_descriptor(&rfc2374_unit_directory);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1673) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1674) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1675)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1676) #if IS_ENABLED(CONFIG_IPV6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1677) err = fw_core_add_descriptor(&rfc3146_unit_directory);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1678) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1679) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1680) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1681)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1682) fwnet_packet_task_cache = kmem_cache_create("packet_task",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1683) sizeof(struct fwnet_packet_task), 0, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1684) if (!fwnet_packet_task_cache) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1685) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1686) goto out2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1687) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1688)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1689) err = driver_register(&fwnet_driver.driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1690) if (!err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1691) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1692)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1693) kmem_cache_destroy(fwnet_packet_task_cache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1694) out2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1695) #if IS_ENABLED(CONFIG_IPV6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1696) fw_core_remove_descriptor(&rfc3146_unit_directory);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1697) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1698) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1699) fw_core_remove_descriptor(&rfc2374_unit_directory);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1700)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1701) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1702) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1703) module_init(fwnet_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1704)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1705) static void __exit fwnet_cleanup(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1706) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1707) driver_unregister(&fwnet_driver.driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1708) kmem_cache_destroy(fwnet_packet_task_cache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1709) #if IS_ENABLED(CONFIG_IPV6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1710) fw_core_remove_descriptor(&rfc3146_unit_directory);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1711) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1712) fw_core_remove_descriptor(&rfc2374_unit_directory);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1713) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1714) module_exit(fwnet_cleanup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1715)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1716) MODULE_AUTHOR("Jay Fenlason <fenlason@redhat.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1717) MODULE_DESCRIPTION("IP over IEEE1394 as per RFC 2734/3146");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1718) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1719) MODULE_DEVICE_TABLE(ieee1394, fwnet_id_table);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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