^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * Linux ARCnet driver - device-independent routines
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Written 1997 by David Woodhouse.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Written 1994-1999 by Avery Pennarun.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Written 1999-2000 by Martin Mares <mj@ucw.cz>.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Derived from skeleton.c by Donald Becker.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * for sponsoring the further development of this driver.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * **********************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * The original copyright was as follows:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * skeleton.c Written 1993 by Donald Becker.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * Copyright 1993 United States Government as represented by the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * Director, National Security Agency. This software may only be used
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * and distributed according to the terms of the GNU General Public License as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * modified by SRC, incorporated herein by reference.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * **********************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * The change log is now in a file called ChangeLog in this directory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * Sources:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * - Crynwr arcnet.com/arcether.com packet drivers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * - arcnet.c v0.00 dated 1/1/94 and apparently by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * Donald Becker - it didn't work :)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * - skeleton.c v0.05 dated 11/16/93 by Donald Becker
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * (from Linux Kernel 1.1.45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * - RFC's 1201 and 1051 - re: TCP/IP over ARCnet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * - The official ARCnet COM9026 data sheets (!) thanks to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * Ken Cornetet <kcornete@nyx10.cs.du.edu>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * - The official ARCnet COM20020 data sheets.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * - Information on some more obscure ARCnet controller chips, thanks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * to the nice people at SMSC.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * - net/inet/eth.c (from kernel 1.1.50) for header-building info.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * - Alternate Linux ARCnet source by V.Shergin <vsher@sao.stavropol.su>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * - Textual information and more alternate source from Joachim Koenig
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * <jojo@repas.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #include <linux/if_arp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #include <net/arp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #include <linux/jiffies.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #include <linux/errqueue.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #include <linux/leds.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #include "arcdevice.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #include "com9026.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) /* "do nothing" functions for protocol drivers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) static void null_rx(struct net_device *dev, int bufnum,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) struct archdr *pkthdr, int length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) static int null_build_header(struct sk_buff *skb, struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) unsigned short type, uint8_t daddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) static int null_prepare_tx(struct net_device *dev, struct archdr *pkt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) int length, int bufnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) static void arcnet_rx(struct net_device *dev, int bufnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) /* one ArcProto per possible proto ID. None of the elements of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) * arc_proto_map are allowed to be NULL; they will get set to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) * arc_proto_default instead. It also must not be NULL; if you would like
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * to set it to NULL, set it to &arc_proto_null instead.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) struct ArcProto *arc_proto_map[256];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) EXPORT_SYMBOL(arc_proto_map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) struct ArcProto *arc_proto_default;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) EXPORT_SYMBOL(arc_proto_default);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) struct ArcProto *arc_bcast_proto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) EXPORT_SYMBOL(arc_bcast_proto);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) struct ArcProto *arc_raw_proto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) EXPORT_SYMBOL(arc_raw_proto);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) static struct ArcProto arc_proto_null = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) .suffix = '?',
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) .mtu = XMTU,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) .is_ip = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) .rx = null_rx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) .build_header = null_build_header,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) .prepare_tx = null_prepare_tx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) .continue_tx = NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) .ack_tx = NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) /* Exported function prototypes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) int arcnet_debug = ARCNET_DEBUG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) EXPORT_SYMBOL(arcnet_debug);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) /* Internal function prototypes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) static int arcnet_header(struct sk_buff *skb, struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) unsigned short type, const void *daddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) const void *saddr, unsigned len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) static int go_tx(struct net_device *dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) static int debug = ARCNET_DEBUG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) module_param(debug, int, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) static int __init arcnet_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) int count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) arcnet_debug = debug;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) pr_info("arcnet loaded\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) /* initialize the protocol map */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) arc_raw_proto = arc_proto_default = arc_bcast_proto = &arc_proto_null;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) for (count = 0; count < 256; count++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) arc_proto_map[count] = arc_proto_default;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) if (BUGLVL(D_DURING))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) pr_info("struct sizes: %zd %zd %zd %zd %zd\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) sizeof(struct arc_hardware),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) sizeof(struct arc_rfc1201),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) sizeof(struct arc_rfc1051),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) sizeof(struct arc_eth_encap),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) sizeof(struct archdr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) static void __exit arcnet_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) module_init(arcnet_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) module_exit(arcnet_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) /* Dump the contents of an sk_buff */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) #if ARCNET_DEBUG_MAX & D_SKB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) void arcnet_dump_skb(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) struct sk_buff *skb, char *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) char hdr[32];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) /* dump the packet */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) snprintf(hdr, sizeof(hdr), "%6s:%s skb->data:", dev->name, desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) print_hex_dump(KERN_DEBUG, hdr, DUMP_PREFIX_OFFSET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 16, 1, skb->data, skb->len, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) EXPORT_SYMBOL(arcnet_dump_skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) /* Dump the contents of an ARCnet buffer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) #if (ARCNET_DEBUG_MAX & (D_RX | D_TX))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) static void arcnet_dump_packet(struct net_device *dev, int bufnum,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) char *desc, int take_arcnet_lock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) struct arcnet_local *lp = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) int i, length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) unsigned long flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) static uint8_t buf[512];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) char hdr[32];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) /* hw.copy_from_card expects IRQ context so take the IRQ lock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) * to keep it single threaded
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) if (take_arcnet_lock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) spin_lock_irqsave(&lp->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) lp->hw.copy_from_card(dev, bufnum, 0, buf, 512);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) if (take_arcnet_lock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) spin_unlock_irqrestore(&lp->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) /* if the offset[0] byte is nonzero, this is a 256-byte packet */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) length = (buf[2] ? 256 : 512);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) /* dump the packet */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) snprintf(hdr, sizeof(hdr), "%6s:%s packet dump:", dev->name, desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) print_hex_dump(KERN_DEBUG, hdr, DUMP_PREFIX_OFFSET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 16, 1, buf, length, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) #define arcnet_dump_packet(dev, bufnum, desc, take_arcnet_lock) do { } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) /* Trigger a LED event in response to a ARCNET device event */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) void arcnet_led_event(struct net_device *dev, enum arcnet_led_event event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) struct arcnet_local *lp = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) unsigned long led_delay = 350;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) unsigned long tx_delay = 50;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) switch (event) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) case ARCNET_LED_EVENT_RECON:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) led_trigger_blink_oneshot(lp->recon_led_trig,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) &led_delay, &led_delay, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) case ARCNET_LED_EVENT_OPEN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) led_trigger_event(lp->tx_led_trig, LED_OFF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) led_trigger_event(lp->recon_led_trig, LED_OFF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) case ARCNET_LED_EVENT_STOP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) led_trigger_event(lp->tx_led_trig, LED_OFF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) led_trigger_event(lp->recon_led_trig, LED_OFF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) case ARCNET_LED_EVENT_TX:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) led_trigger_blink_oneshot(lp->tx_led_trig,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) &tx_delay, &tx_delay, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) EXPORT_SYMBOL_GPL(arcnet_led_event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) static void arcnet_led_release(struct device *gendev, void *res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) struct arcnet_local *lp = netdev_priv(to_net_dev(gendev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) led_trigger_unregister_simple(lp->tx_led_trig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) led_trigger_unregister_simple(lp->recon_led_trig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) /* Register ARCNET LED triggers for a arcnet device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) * This is normally called from a driver's probe function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) void devm_arcnet_led_init(struct net_device *netdev, int index, int subid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) struct arcnet_local *lp = netdev_priv(netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) void *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) res = devres_alloc(arcnet_led_release, 0, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) if (!res) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) netdev_err(netdev, "cannot register LED triggers\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) snprintf(lp->tx_led_trig_name, sizeof(lp->tx_led_trig_name),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) "arc%d-%d-tx", index, subid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) snprintf(lp->recon_led_trig_name, sizeof(lp->recon_led_trig_name),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) "arc%d-%d-recon", index, subid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) led_trigger_register_simple(lp->tx_led_trig_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) &lp->tx_led_trig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) led_trigger_register_simple(lp->recon_led_trig_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) &lp->recon_led_trig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) devres_add(&netdev->dev, res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) EXPORT_SYMBOL_GPL(devm_arcnet_led_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) /* Unregister a protocol driver from the arc_proto_map. Protocol drivers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) * are responsible for registering themselves, but the unregister routine
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) * is pretty generic so we'll do it here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) void arcnet_unregister_proto(struct ArcProto *proto)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) int count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) if (arc_proto_default == proto)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) arc_proto_default = &arc_proto_null;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) if (arc_bcast_proto == proto)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) arc_bcast_proto = arc_proto_default;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) if (arc_raw_proto == proto)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) arc_raw_proto = arc_proto_default;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) for (count = 0; count < 256; count++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) if (arc_proto_map[count] == proto)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) arc_proto_map[count] = arc_proto_default;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) EXPORT_SYMBOL(arcnet_unregister_proto);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) /* Add a buffer to the queue. Only the interrupt handler is allowed to do
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) * this, unless interrupts are disabled.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) * Note: we don't check for a full queue, since there aren't enough buffers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) * to more than fill it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) static void release_arcbuf(struct net_device *dev, int bufnum)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) struct arcnet_local *lp = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) lp->buf_queue[lp->first_free_buf++] = bufnum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) lp->first_free_buf %= 5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) if (BUGLVL(D_DURING)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) arc_printk(D_DURING, dev, "release_arcbuf: freed #%d; buffer queue is now: ",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) bufnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) for (i = lp->next_buf; i != lp->first_free_buf; i = (i + 1) % 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) arc_cont(D_DURING, "#%d ", lp->buf_queue[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) arc_cont(D_DURING, "\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) /* Get a buffer from the queue.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) * If this returns -1, there are no buffers available.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) static int get_arcbuf(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) struct arcnet_local *lp = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) int buf = -1, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) if (!atomic_dec_and_test(&lp->buf_lock)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) /* already in this function */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) arc_printk(D_NORMAL, dev, "get_arcbuf: overlap (%d)!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) lp->buf_lock.counter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) } else { /* we can continue */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) if (lp->next_buf >= 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) lp->next_buf -= 5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) if (lp->next_buf == lp->first_free_buf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) arc_printk(D_NORMAL, dev, "get_arcbuf: BUG: no buffers are available??\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) buf = lp->buf_queue[lp->next_buf++];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) lp->next_buf %= 5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) if (BUGLVL(D_DURING)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) arc_printk(D_DURING, dev, "get_arcbuf: got #%d; buffer queue is now: ",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) for (i = lp->next_buf; i != lp->first_free_buf; i = (i + 1) % 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) arc_cont(D_DURING, "#%d ", lp->buf_queue[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) arc_cont(D_DURING, "\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) atomic_inc(&lp->buf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) return buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) static int choose_mtu(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) int count, mtu = 65535;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) /* choose the smallest MTU of all available encaps */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) for (count = 0; count < 256; count++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) if (arc_proto_map[count] != &arc_proto_null &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) arc_proto_map[count]->mtu < mtu) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) mtu = arc_proto_map[count]->mtu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) return mtu == 65535 ? XMTU : mtu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) static const struct header_ops arcnet_header_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) .create = arcnet_header,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) static const struct net_device_ops arcnet_netdev_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) .ndo_open = arcnet_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) .ndo_stop = arcnet_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) .ndo_start_xmit = arcnet_send_packet,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) .ndo_tx_timeout = arcnet_timeout,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) /* Setup a struct device for ARCnet. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) static void arcdev_setup(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) dev->type = ARPHRD_ARCNET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) dev->netdev_ops = &arcnet_netdev_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) dev->header_ops = &arcnet_header_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) dev->hard_header_len = sizeof(struct arc_hardware);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) dev->mtu = choose_mtu();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) dev->addr_len = ARCNET_ALEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) dev->tx_queue_len = 100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) dev->broadcast[0] = 0x00; /* for us, broadcasts are address 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) dev->watchdog_timeo = TX_TIMEOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) /* New-style flags. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) dev->flags = IFF_BROADCAST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) static void arcnet_timer(struct timer_list *t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) struct arcnet_local *lp = from_timer(lp, t, timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) struct net_device *dev = lp->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) if (!netif_carrier_ok(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) netif_carrier_on(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) netdev_info(dev, "link up\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) static void arcnet_reply_tasklet(unsigned long data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) struct arcnet_local *lp = (struct arcnet_local *)data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) struct sk_buff *ackskb, *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) struct sock_exterr_skb *serr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) struct sock *sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) local_irq_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) skb = lp->outgoing.skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) if (!skb || !skb->sk) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) local_irq_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) sock_hold(skb->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) sk = skb->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) ackskb = skb_clone_sk(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) sock_put(skb->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) if (!ackskb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) local_irq_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) serr = SKB_EXT_ERR(ackskb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) memset(serr, 0, sizeof(*serr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) serr->ee.ee_errno = ENOMSG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) serr->ee.ee_origin = SO_EE_ORIGIN_TXSTATUS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) serr->ee.ee_data = skb_shinfo(skb)->tskey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) serr->ee.ee_info = lp->reply_status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) /* finally erasing outgoing skb */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) dev_kfree_skb(lp->outgoing.skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) lp->outgoing.skb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) ackskb->dev = lp->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) ret = sock_queue_err_skb(sk, ackskb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) kfree_skb(ackskb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) local_irq_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) struct net_device *alloc_arcdev(const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) dev = alloc_netdev(sizeof(struct arcnet_local),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) name && *name ? name : "arc%d", NET_NAME_UNKNOWN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) arcdev_setup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) if (dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) struct arcnet_local *lp = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) lp->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) spin_lock_init(&lp->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) timer_setup(&lp->timer, arcnet_timer, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) return dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) EXPORT_SYMBOL(alloc_arcdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) /* Open/initialize the board. This is called sometime after booting when
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) * the 'ifconfig' program is run.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) * This routine should set everything up anew at each open, even registers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) * that "should" only need to be set once at boot, so that there is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) * non-reboot way to recover if something goes wrong.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) int arcnet_open(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) struct arcnet_local *lp = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) int count, newmtu, error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) arc_printk(D_INIT, dev, "opened.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) if (!try_module_get(lp->hw.owner))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) if (BUGLVL(D_PROTO)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) arc_printk(D_PROTO, dev, "protocol map (default is '%c'): ",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) arc_proto_default->suffix);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) for (count = 0; count < 256; count++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) arc_cont(D_PROTO, "%c", arc_proto_map[count]->suffix);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) arc_cont(D_PROTO, "\n");
^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) tasklet_init(&lp->reply_tasklet, arcnet_reply_tasklet,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) (unsigned long)lp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) arc_printk(D_INIT, dev, "arcnet_open: resetting card.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) /* try to put the card in a defined state - if it fails the first
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) * time, actually reset it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) error = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) if (lp->hw.reset(dev, 0) && lp->hw.reset(dev, 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) goto out_module_put;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) newmtu = choose_mtu();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) if (newmtu < dev->mtu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) dev->mtu = newmtu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) arc_printk(D_INIT, dev, "arcnet_open: mtu: %d.\n", dev->mtu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) /* autodetect the encapsulation for each host. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) memset(lp->default_proto, 0, sizeof(lp->default_proto));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) /* the broadcast address is special - use the 'bcast' protocol */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) for (count = 0; count < 256; count++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) if (arc_proto_map[count] == arc_bcast_proto) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) lp->default_proto[0] = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) /* initialize buffers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) atomic_set(&lp->buf_lock, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) lp->next_buf = lp->first_free_buf = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) release_arcbuf(dev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) release_arcbuf(dev, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) release_arcbuf(dev, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) release_arcbuf(dev, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) lp->cur_tx = lp->next_tx = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) lp->cur_rx = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) lp->rfc1201.sequence = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) /* bring up the hardware driver */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) if (lp->hw.open)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) lp->hw.open(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) if (dev->dev_addr[0] == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) arc_printk(D_NORMAL, dev, "WARNING! Station address 00 is reserved for broadcasts!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) else if (dev->dev_addr[0] == 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) arc_printk(D_NORMAL, dev, "WARNING! Station address FF may confuse DOS networking programs!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) if (lp->hw.status(dev) & RESETflag) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) arc_printk(D_DEBUG, dev, "%s: %d: %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) __FILE__, __LINE__, __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) lp->hw.command(dev, CFLAGScmd | RESETclear);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) /* make sure we're ready to receive IRQ's. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) lp->hw.intmask(dev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) udelay(1); /* give it time to set the mask before
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) * we reset it again. (may not even be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) * necessary)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) lp->intmask = NORXflag | RECONflag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) lp->hw.intmask(dev, lp->intmask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) netif_carrier_off(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) netif_start_queue(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) mod_timer(&lp->timer, jiffies + msecs_to_jiffies(1000));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) arcnet_led_event(dev, ARCNET_LED_EVENT_OPEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) out_module_put:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) module_put(lp->hw.owner);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) EXPORT_SYMBOL(arcnet_open);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) /* The inverse routine to arcnet_open - shuts down the card. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) int arcnet_close(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) struct arcnet_local *lp = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) arcnet_led_event(dev, ARCNET_LED_EVENT_STOP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) del_timer_sync(&lp->timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) netif_stop_queue(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) netif_carrier_off(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) tasklet_kill(&lp->reply_tasklet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) /* flush TX and disable RX */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) lp->hw.intmask(dev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) lp->hw.command(dev, NOTXcmd); /* stop transmit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) lp->hw.command(dev, NORXcmd); /* disable receive */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) mdelay(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) /* shut down the card */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) lp->hw.close(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) module_put(lp->hw.owner);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) EXPORT_SYMBOL(arcnet_close);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) static int arcnet_header(struct sk_buff *skb, struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) unsigned short type, const void *daddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) const void *saddr, unsigned len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) const struct arcnet_local *lp = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) uint8_t _daddr, proto_num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) struct ArcProto *proto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) arc_printk(D_DURING, dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) "create header from %d to %d; protocol %d (%Xh); size %u.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) saddr ? *(uint8_t *)saddr : -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) daddr ? *(uint8_t *)daddr : -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) type, type, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) if (skb->len != 0 && len != skb->len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) arc_printk(D_NORMAL, dev, "arcnet_header: Yikes! skb->len(%d) != len(%d)!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) skb->len, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) /* Type is host order - ? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) if (type == ETH_P_ARCNET) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) proto = arc_raw_proto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) arc_printk(D_DEBUG, dev, "arc_raw_proto used. proto='%c'\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) proto->suffix);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) _daddr = daddr ? *(uint8_t *)daddr : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) } else if (!daddr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) /* if the dest addr isn't provided, we can't choose an
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) * encapsulation! Store the packet type (eg. ETH_P_IP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) * for now, and we'll push on a real header when we do
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) * rebuild_header.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) *(uint16_t *)skb_push(skb, 2) = type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) /* XXX: Why not use skb->mac_len? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) if (skb->network_header - skb->mac_header != 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) arc_printk(D_NORMAL, dev, "arcnet_header: Yikes! diff (%u) is not 2!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) skb->network_header - skb->mac_header);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) return -2; /* return error -- can't transmit yet! */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) /* otherwise, we can just add the header as usual. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) _daddr = *(uint8_t *)daddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) proto_num = lp->default_proto[_daddr];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) proto = arc_proto_map[proto_num];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) arc_printk(D_DURING, dev, "building header for %02Xh using protocol '%c'\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) proto_num, proto->suffix);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) if (proto == &arc_proto_null && arc_bcast_proto != proto) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) arc_printk(D_DURING, dev, "actually, let's use '%c' instead.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) arc_bcast_proto->suffix);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) proto = arc_bcast_proto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) return proto->build_header(skb, dev, type, _daddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) /* Called by the kernel in order to transmit a packet. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) netdev_tx_t arcnet_send_packet(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) struct arcnet_local *lp = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) struct archdr *pkt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) struct arc_rfc1201 *soft;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) struct ArcProto *proto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) int txbuf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) arc_printk(D_DURING, dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) "transmit requested (status=%Xh, txbufs=%d/%d, len=%d, protocol %x)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) lp->hw.status(dev), lp->cur_tx, lp->next_tx, skb->len, skb->protocol);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) pkt = (struct archdr *)skb->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) soft = &pkt->soft.rfc1201;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) proto = arc_proto_map[soft->proto];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) arc_printk(D_SKB_SIZE, dev, "skb: transmitting %d bytes to %02X\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) skb->len, pkt->hard.dest);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) if (BUGLVL(D_SKB))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) arcnet_dump_skb(dev, skb, "tx");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) /* fits in one packet? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) if (skb->len - ARC_HDR_SIZE > XMTU && !proto->continue_tx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) arc_printk(D_NORMAL, dev, "fixme: packet too large: compensating badly!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) dev_kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) return NETDEV_TX_OK; /* don't try again */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) /* We're busy transmitting a packet... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) netif_stop_queue(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) spin_lock_irqsave(&lp->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) lp->hw.intmask(dev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) if (lp->next_tx == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) txbuf = get_arcbuf(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) txbuf = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) if (txbuf != -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) lp->outgoing.skb = skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) if (proto->prepare_tx(dev, pkt, skb->len, txbuf) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) !proto->ack_tx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) /* done right away and we don't want to acknowledge
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) * the package later - forget about it now
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) dev->stats.tx_bytes += skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) /* do it the 'split' way */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) lp->outgoing.proto = proto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) lp->outgoing.skb = skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) lp->outgoing.pkt = pkt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) if (proto->continue_tx &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) proto->continue_tx(dev, txbuf)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) arc_printk(D_NORMAL, dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) "bug! continue_tx finished the first time! (proto='%c')\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) proto->suffix);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) retval = NETDEV_TX_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) lp->next_tx = txbuf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) retval = NETDEV_TX_BUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) arc_printk(D_DEBUG, dev, "%s: %d: %s, status: %x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) __FILE__, __LINE__, __func__, lp->hw.status(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) /* make sure we didn't ignore a TX IRQ while we were in here */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) lp->hw.intmask(dev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) lp->intmask |= TXFREEflag | EXCNAKflag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) lp->hw.intmask(dev, lp->intmask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) arc_printk(D_DEBUG, dev, "%s: %d: %s, status: %x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) __FILE__, __LINE__, __func__, lp->hw.status(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) arcnet_led_event(dev, ARCNET_LED_EVENT_TX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) spin_unlock_irqrestore(&lp->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) return retval; /* no need to try again */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) EXPORT_SYMBOL(arcnet_send_packet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) /* Actually start transmitting a packet that was loaded into a buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) * by prepare_tx. This should _only_ be called by the interrupt handler.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) static int go_tx(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) struct arcnet_local *lp = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) arc_printk(D_DURING, dev, "go_tx: status=%Xh, intmask=%Xh, next_tx=%d, cur_tx=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) lp->hw.status(dev), lp->intmask, lp->next_tx, lp->cur_tx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) if (lp->cur_tx != -1 || lp->next_tx == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) if (BUGLVL(D_TX))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) arcnet_dump_packet(dev, lp->next_tx, "go_tx", 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) lp->cur_tx = lp->next_tx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) lp->next_tx = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) /* start sending */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) lp->hw.command(dev, TXcmd | (lp->cur_tx << 3));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) dev->stats.tx_packets++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) lp->lasttrans_dest = lp->lastload_dest;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) lp->lastload_dest = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) lp->excnak_pending = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) lp->intmask |= TXFREEflag | EXCNAKflag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) /* Called by the kernel when transmit times out */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) void arcnet_timeout(struct net_device *dev, unsigned int txqueue)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) struct arcnet_local *lp = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) int status = lp->hw.status(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) char *msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) spin_lock_irqsave(&lp->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) if (status & TXFREEflag) { /* transmit _DID_ finish */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) msg = " - missed IRQ?";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) msg = "";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) dev->stats.tx_aborted_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) lp->timed_out = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) lp->hw.command(dev, NOTXcmd | (lp->cur_tx << 3));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) dev->stats.tx_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) /* make sure we didn't miss a TX or a EXC NAK IRQ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) lp->hw.intmask(dev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) lp->intmask |= TXFREEflag | EXCNAKflag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) lp->hw.intmask(dev, lp->intmask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) spin_unlock_irqrestore(&lp->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) if (time_after(jiffies, lp->last_timeout + 10 * HZ)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) arc_printk(D_EXTRA, dev, "tx timed out%s (status=%Xh, intmask=%Xh, dest=%02Xh)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) msg, status, lp->intmask, lp->lasttrans_dest);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) lp->last_timeout = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) if (lp->cur_tx == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) netif_wake_queue(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) EXPORT_SYMBOL(arcnet_timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) /* The typical workload of the driver: Handle the network interface
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) * interrupts. Establish which device needs attention, and call the correct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) * chipset interrupt handler.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) irqreturn_t arcnet_interrupt(int irq, void *dev_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) struct net_device *dev = dev_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) struct arcnet_local *lp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) int recbuf, status, diagstatus, didsomething, boguscount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) int retval = IRQ_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) arc_printk(D_DURING, dev, "\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) arc_printk(D_DURING, dev, "in arcnet_interrupt\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) lp = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) BUG_ON(!lp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) spin_lock_irqsave(&lp->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) /* RESET flag was enabled - if device is not running, we must
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) * clear it right away (but nothing else).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) if (!netif_running(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) if (lp->hw.status(dev) & RESETflag)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) lp->hw.command(dev, CFLAGScmd | RESETclear);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) lp->hw.intmask(dev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) spin_unlock_irqrestore(&lp->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) arc_printk(D_DURING, dev, "in arcnet_inthandler (status=%Xh, intmask=%Xh)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) lp->hw.status(dev), lp->intmask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) boguscount = 5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) status = lp->hw.status(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) diagstatus = (status >> 8) & 0xFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) arc_printk(D_DEBUG, dev, "%s: %d: %s: status=%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) __FILE__, __LINE__, __func__, status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) didsomething = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) /* RESET flag was enabled - card is resetting and if RX is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) * disabled, it's NOT because we just got a packet.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) * The card is in an undefined state.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) * Clear it out and start over.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) if (status & RESETflag) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) arc_printk(D_NORMAL, dev, "spurious reset (status=%Xh)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) arcnet_close(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) arcnet_open(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) /* get out of the interrupt handler! */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) /* RX is inhibited - we must have received something.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) * Prepare to receive into the next buffer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) * We don't actually copy the received packet from the card
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) * until after the transmit handler runs (and possibly
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) * launches the next tx); this should improve latency slightly
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) * if we get both types of interrupts at once.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) recbuf = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) if (status & lp->intmask & NORXflag) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) recbuf = lp->cur_rx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) arc_printk(D_DURING, dev, "Buffer #%d: receive irq (status=%Xh)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) recbuf, status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) lp->cur_rx = get_arcbuf(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) if (lp->cur_rx != -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) arc_printk(D_DURING, dev, "enabling receive to buffer #%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) lp->cur_rx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) lp->hw.command(dev, RXcmd | (lp->cur_rx << 3) | RXbcasts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) didsomething++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) if ((diagstatus & EXCNAKflag)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) arc_printk(D_DURING, dev, "EXCNAK IRQ (diagstat=%Xh)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) diagstatus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) lp->hw.command(dev, NOTXcmd); /* disable transmit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) lp->excnak_pending = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) lp->hw.command(dev, EXCNAKclear);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) lp->intmask &= ~(EXCNAKflag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) didsomething++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) /* a transmit finished, and we're interested in it. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) if ((status & lp->intmask & TXFREEflag) || lp->timed_out) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) int ackstatus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) lp->intmask &= ~(TXFREEflag | EXCNAKflag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) if (status & TXACKflag)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) ackstatus = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) else if (lp->excnak_pending)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) ackstatus = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) ackstatus = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) arc_printk(D_DURING, dev, "TX IRQ (stat=%Xh)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) if (lp->cur_tx != -1 && !lp->timed_out) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) if (!(status & TXACKflag)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) if (lp->lasttrans_dest != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) arc_printk(D_EXTRA, dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) "transmit was not acknowledged! (status=%Xh, dest=%02Xh)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) status,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) lp->lasttrans_dest);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) dev->stats.tx_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) dev->stats.tx_carrier_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) arc_printk(D_DURING, dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) "broadcast was not acknowledged; that's normal (status=%Xh, dest=%02Xh)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) status,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) lp->lasttrans_dest);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) if (lp->outgoing.proto &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) lp->outgoing.proto->ack_tx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) lp->outgoing.proto
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) ->ack_tx(dev, ackstatus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) lp->reply_status = ackstatus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) tasklet_hi_schedule(&lp->reply_tasklet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) if (lp->cur_tx != -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) release_arcbuf(dev, lp->cur_tx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) lp->cur_tx = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) lp->timed_out = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) didsomething++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) /* send another packet if there is one */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) go_tx(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) /* continue a split packet, if any */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) if (lp->outgoing.proto &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) lp->outgoing.proto->continue_tx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) int txbuf = get_arcbuf(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) if (txbuf != -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) if (lp->outgoing.proto->continue_tx(dev, txbuf)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) /* that was the last segment */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) dev->stats.tx_bytes += lp->outgoing.skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) if (!lp->outgoing.proto->ack_tx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) dev_kfree_skb_irq(lp->outgoing.skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) lp->outgoing.proto = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) lp->next_tx = txbuf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) /* inform upper layers of idleness, if necessary */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) if (lp->cur_tx == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) netif_wake_queue(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) /* now process the received packet, if any */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) if (recbuf != -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) if (BUGLVL(D_RX))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) arcnet_dump_packet(dev, recbuf, "rx irq", 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) arcnet_rx(dev, recbuf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) release_arcbuf(dev, recbuf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) didsomething++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) if (status & lp->intmask & RECONflag) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) lp->hw.command(dev, CFLAGScmd | CONFIGclear);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) dev->stats.tx_carrier_errors++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) arc_printk(D_RECON, dev, "Network reconfiguration detected (status=%Xh)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) if (netif_carrier_ok(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) netif_carrier_off(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) netdev_info(dev, "link down\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) mod_timer(&lp->timer, jiffies + msecs_to_jiffies(1000));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) arcnet_led_event(dev, ARCNET_LED_EVENT_RECON);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) /* MYRECON bit is at bit 7 of diagstatus */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) if (diagstatus & 0x80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) arc_printk(D_RECON, dev, "Put out that recon myself\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) /* is the RECON info empty or old? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) if (!lp->first_recon || !lp->last_recon ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) time_after(jiffies, lp->last_recon + HZ * 10)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) if (lp->network_down)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) arc_printk(D_NORMAL, dev, "reconfiguration detected: cabling restored?\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) lp->first_recon = lp->last_recon = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) lp->num_recons = lp->network_down = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) arc_printk(D_DURING, dev, "recon: clearing counters.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) } else { /* add to current RECON counter */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) lp->last_recon = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) lp->num_recons++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) arc_printk(D_DURING, dev, "recon: counter=%d, time=%lds, net=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) lp->num_recons,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) (lp->last_recon - lp->first_recon) / HZ,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) lp->network_down);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) /* if network is marked up;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) * and first_recon and last_recon are 60+ apart;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) * and the average no. of recons counted is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) * > RECON_THRESHOLD/min;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) * then print a warning message.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) if (!lp->network_down &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) (lp->last_recon - lp->first_recon) <= HZ * 60 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) lp->num_recons >= RECON_THRESHOLD) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) lp->network_down = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) arc_printk(D_NORMAL, dev, "many reconfigurations detected: cabling problem?\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) } else if (!lp->network_down &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) lp->last_recon - lp->first_recon > HZ * 60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) /* reset counters if we've gone for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) * over a minute.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) lp->first_recon = lp->last_recon;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) lp->num_recons = 1;
^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) } else if (lp->network_down &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) time_after(jiffies, lp->last_recon + HZ * 10)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) if (lp->network_down)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) arc_printk(D_NORMAL, dev, "cabling restored?\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) lp->first_recon = lp->last_recon = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) lp->num_recons = lp->network_down = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) arc_printk(D_DURING, dev, "not recon: clearing counters anyway.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) netif_carrier_on(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) if (didsomething)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) retval |= IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) } while (--boguscount && didsomething);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) arc_printk(D_DURING, dev, "arcnet_interrupt complete (status=%Xh, count=%d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) lp->hw.status(dev), boguscount);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) arc_printk(D_DURING, dev, "\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) lp->hw.intmask(dev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) udelay(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) lp->hw.intmask(dev, lp->intmask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) spin_unlock_irqrestore(&lp->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) EXPORT_SYMBOL(arcnet_interrupt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) /* This is a generic packet receiver that calls arcnet??_rx depending on the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) * protocol ID found.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) static void arcnet_rx(struct net_device *dev, int bufnum)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) struct arcnet_local *lp = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) union {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) struct archdr pkt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) char buf[512];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) } rxdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) struct arc_rfc1201 *soft;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) int length, ofs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) soft = &rxdata.pkt.soft.rfc1201;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) lp->hw.copy_from_card(dev, bufnum, 0, &rxdata.pkt, ARC_HDR_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) if (rxdata.pkt.hard.offset[0]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) ofs = rxdata.pkt.hard.offset[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) length = 256 - ofs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) ofs = rxdata.pkt.hard.offset[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) length = 512 - ofs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) /* get the full header, if possible */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) if (sizeof(rxdata.pkt.soft) <= length) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) lp->hw.copy_from_card(dev, bufnum, ofs, soft, sizeof(rxdata.pkt.soft));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) memset(&rxdata.pkt.soft, 0, sizeof(rxdata.pkt.soft));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) lp->hw.copy_from_card(dev, bufnum, ofs, soft, length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) arc_printk(D_DURING, dev, "Buffer #%d: received packet from %02Xh to %02Xh (%d+4 bytes)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) bufnum, rxdata.pkt.hard.source, rxdata.pkt.hard.dest, length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) dev->stats.rx_packets++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) dev->stats.rx_bytes += length + ARC_HDR_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) /* call the right receiver for the protocol */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) if (arc_proto_map[soft->proto]->is_ip) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) if (BUGLVL(D_PROTO)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) struct ArcProto
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) *oldp = arc_proto_map[lp->default_proto[rxdata.pkt.hard.source]],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) *newp = arc_proto_map[soft->proto];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) if (oldp != newp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) arc_printk(D_PROTO, dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) "got protocol %02Xh; encap for host %02Xh is now '%c' (was '%c')\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) soft->proto, rxdata.pkt.hard.source,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) newp->suffix, oldp->suffix);
^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)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) /* broadcasts will always be done with the last-used encap. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) lp->default_proto[0] = soft->proto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) /* in striking contrast, the following isn't a hack. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) lp->default_proto[rxdata.pkt.hard.source] = soft->proto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) /* call the protocol-specific receiver. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) arc_proto_map[soft->proto]->rx(dev, bufnum, &rxdata.pkt, length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) static void null_rx(struct net_device *dev, int bufnum,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) struct archdr *pkthdr, int length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) arc_printk(D_PROTO, dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) "rx: don't know how to deal with proto %02Xh from host %02Xh.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) pkthdr->soft.rfc1201.proto, pkthdr->hard.source);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) static int null_build_header(struct sk_buff *skb, struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) unsigned short type, uint8_t daddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) struct arcnet_local *lp = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) arc_printk(D_PROTO, dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) "tx: can't build header for encap %02Xh; load a protocol driver.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) lp->default_proto[daddr]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) /* always fails */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) /* the "do nothing" prepare_tx function warns that there's nothing to do. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) static int null_prepare_tx(struct net_device *dev, struct archdr *pkt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) int length, int bufnum)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) struct arcnet_local *lp = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) struct arc_hardware newpkt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) arc_printk(D_PROTO, dev, "tx: no encap for this host; load a protocol driver.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) /* send a packet to myself -- will never get received, of course */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) newpkt.source = newpkt.dest = dev->dev_addr[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) /* only one byte of actual data (and it's random) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) newpkt.offset[0] = 0xFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) lp->hw.copy_to_card(dev, bufnum, 0, &newpkt, ARC_HDR_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) return 1; /* done */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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