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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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7a97bc03e0
When eth1394 was unable to acquire a transaction label, it just dropped outgoing packets without attempt to resend them later. The transmit queue is now halted if no tlabel is available to ->hard_start_xmit(). A workqueue job is then scheduled to catch the moment when ieee1394 recycled the next lot of tlabels. Fixes http://bugzilla.kernel.org/show_bug.cgi?id=8402 Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
236 lines
6.4 KiB
C
236 lines
6.4 KiB
C
/*
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* eth1394.h -- Ethernet driver for Linux IEEE-1394 Subsystem
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*
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* Copyright (C) 2000 Bonin Franck <boninf@free.fr>
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* (C) 2001 Ben Collins <bcollins@debian.org>
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*
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* Mainly based on work by Emanuel Pirker and Andreas E. Bombe
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef __ETH1394_H
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#define __ETH1394_H
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#include <linux/netdevice.h>
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#include <linux/skbuff.h>
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#include <asm/byteorder.h>
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#include "ieee1394.h"
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#include "ieee1394_types.h"
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/* Register for incoming packets. This is 4096 bytes, which supports up to
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* S3200 (per Table 16-3 of IEEE 1394b-2002). */
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#define ETHER1394_REGION_ADDR_LEN 4096
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/* GASP identifier numbers for IPv4 over IEEE 1394 */
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#define ETHER1394_GASP_SPECIFIER_ID 0x00005E
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#define ETHER1394_GASP_SPECIFIER_ID_HI ((0x00005E >> 8) & 0xffff)
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#define ETHER1394_GASP_SPECIFIER_ID_LO (0x00005E & 0xff)
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#define ETHER1394_GASP_VERSION 1
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#define ETHER1394_GASP_OVERHEAD (2 * sizeof(quadlet_t)) /* for GASP header */
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#define ETHER1394_GASP_BUFFERS 16
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#define NODE_SET (ALL_NODES + 1) /* Node set == 64 */
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enum eth1394_bc_states { ETHER1394_BC_ERROR,
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ETHER1394_BC_RUNNING,
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ETHER1394_BC_STOPPED };
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/* Private structure for our ethernet driver */
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struct eth1394_priv {
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struct net_device_stats stats; /* Device stats */
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struct hpsb_host *host; /* The card for this dev */
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u16 bc_maxpayload; /* Max broadcast payload */
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u8 bc_sspd; /* Max broadcast speed */
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u64 local_fifo; /* Local FIFO Address */
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spinlock_t lock; /* Private lock */
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int broadcast_channel; /* Async stream Broadcast Channel */
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enum eth1394_bc_states bc_state; /* broadcast channel state */
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struct hpsb_iso *iso; /* Async stream recv handle */
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int bc_dgl; /* Outgoing broadcast datagram label */
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struct list_head ip_node_list; /* List of IP capable nodes */
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struct unit_directory *ud_list[ALL_NODES]; /* Cached unit dir list */
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struct work_struct wake; /* Wake up after xmit failure */
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struct net_device *wake_dev; /* Stupid backlink for .wake */
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nodeid_t wake_node; /* Destination of failed xmit */
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};
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/* Define a fake hardware header format for the networking core. Note that
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* header size cannot exceed 16 bytes as that is the size of the header cache.
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* Also, we do not need the source address in the header so we omit it and
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* keep the header to under 16 bytes */
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#define ETH1394_ALEN (8)
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#define ETH1394_HLEN (10)
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struct eth1394hdr {
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unsigned char h_dest[ETH1394_ALEN]; /* destination eth1394 addr */
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unsigned short h_proto; /* packet type ID field */
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} __attribute__((packed));
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static inline struct eth1394hdr *eth1394_hdr(const struct sk_buff *skb)
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{
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return (struct eth1394hdr *)skb_mac_header(skb);
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}
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typedef enum {ETH1394_GASP, ETH1394_WRREQ} eth1394_tx_type;
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/* IP1394 headers */
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/* Unfragmented */
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#if defined __BIG_ENDIAN_BITFIELD
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struct eth1394_uf_hdr {
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u16 lf:2;
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u16 res:14;
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u16 ether_type; /* Ethernet packet type */
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} __attribute__((packed));
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#elif defined __LITTLE_ENDIAN_BITFIELD
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struct eth1394_uf_hdr {
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u16 res:14;
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u16 lf:2;
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u16 ether_type;
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} __attribute__((packed));
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#else
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#error Unknown bit field type
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#endif
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/* First fragment */
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#if defined __BIG_ENDIAN_BITFIELD
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struct eth1394_ff_hdr {
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u16 lf:2;
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u16 res1:2;
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u16 dg_size:12; /* Datagram size */
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u16 ether_type; /* Ethernet packet type */
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u16 dgl; /* Datagram label */
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u16 res2;
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} __attribute__((packed));
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#elif defined __LITTLE_ENDIAN_BITFIELD
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struct eth1394_ff_hdr {
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u16 dg_size:12;
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u16 res1:2;
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u16 lf:2;
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u16 ether_type;
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u16 dgl;
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u16 res2;
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} __attribute__((packed));
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#else
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#error Unknown bit field type
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#endif
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/* XXX: Subsequent fragments, including last */
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#if defined __BIG_ENDIAN_BITFIELD
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struct eth1394_sf_hdr {
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u16 lf:2;
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u16 res1:2;
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u16 dg_size:12; /* Datagram size */
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u16 res2:4;
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u16 fg_off:12; /* Fragment offset */
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u16 dgl; /* Datagram label */
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u16 res3;
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} __attribute__((packed));
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#elif defined __LITTLE_ENDIAN_BITFIELD
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struct eth1394_sf_hdr {
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u16 dg_size:12;
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u16 res1:2;
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u16 lf:2;
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u16 fg_off:12;
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u16 res2:4;
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u16 dgl;
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u16 res3;
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} __attribute__((packed));
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#else
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#error Unknown bit field type
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#endif
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#if defined __BIG_ENDIAN_BITFIELD
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struct eth1394_common_hdr {
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u16 lf:2;
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u16 pad1:14;
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} __attribute__((packed));
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#elif defined __LITTLE_ENDIAN_BITFIELD
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struct eth1394_common_hdr {
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u16 pad1:14;
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u16 lf:2;
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} __attribute__((packed));
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#else
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#error Unknown bit field type
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#endif
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struct eth1394_hdr_words {
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u16 word1;
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u16 word2;
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u16 word3;
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u16 word4;
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};
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union eth1394_hdr {
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struct eth1394_common_hdr common;
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struct eth1394_uf_hdr uf;
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struct eth1394_ff_hdr ff;
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struct eth1394_sf_hdr sf;
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struct eth1394_hdr_words words;
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};
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/* End of IP1394 headers */
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/* Fragment types */
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#define ETH1394_HDR_LF_UF 0 /* unfragmented */
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#define ETH1394_HDR_LF_FF 1 /* first fragment */
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#define ETH1394_HDR_LF_LF 2 /* last fragment */
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#define ETH1394_HDR_LF_IF 3 /* interior fragment */
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#define IP1394_HW_ADDR_LEN 16 /* As per RFC */
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/* Our arp packet (ARPHRD_IEEE1394) */
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struct eth1394_arp {
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u16 hw_type; /* 0x0018 */
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u16 proto_type; /* 0x0806 */
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u8 hw_addr_len; /* 16 */
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u8 ip_addr_len; /* 4 */
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u16 opcode; /* ARP Opcode */
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/* Above is exactly the same format as struct arphdr */
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u64 s_uniq_id; /* Sender's 64bit EUI */
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u8 max_rec; /* Sender's max packet size */
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u8 sspd; /* Sender's max speed */
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u16 fifo_hi; /* hi 16bits of sender's FIFO addr */
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u32 fifo_lo; /* lo 32bits of sender's FIFO addr */
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u32 sip; /* Sender's IP Address */
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u32 tip; /* IP Address of requested hw addr */
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};
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/* Network timeout */
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#define ETHER1394_TIMEOUT 100000
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/* This is our task struct. It's used for the packet complete callback. */
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struct packet_task {
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struct sk_buff *skb;
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int outstanding_pkts;
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eth1394_tx_type tx_type;
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int max_payload;
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struct hpsb_packet *packet;
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struct eth1394_priv *priv;
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union eth1394_hdr hdr;
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u64 addr;
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u16 dest_node;
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};
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#endif /* __ETH1394_H */
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