633 lines
16 KiB
C
633 lines
16 KiB
C
/*-
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* SPDX-License-Identifier: BSD-4-Clause
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*
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* Copyright (c) 2002-2003
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* Hidetoshi Shimokawa. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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*
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* This product includes software developed by Hidetoshi Shimokawa.
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*
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* 4. Neither the name of the author nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifdef HAVE_KERNEL_OPTION_HEADERS
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#include "opt_device_polling.h"
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#include "opt_inet.h"
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#endif
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <sys/sysctl.h>
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#include <sys/systm.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <net/bpf.h>
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#include <net/ethernet.h>
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#include <net/if.h>
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#include <net/if_var.h>
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#include <net/if_arp.h>
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#include <net/if_types.h>
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#include <net/if_vlan_var.h>
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#include <dev/firewire/firewire.h>
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#include <dev/firewire/firewirereg.h>
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#include <dev/firewire/if_fwevar.h>
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#define FWEDEBUG if (fwedebug) if_printf
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#define TX_MAX_QUEUE (FWMAXQUEUE - 1)
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/* network interface */
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static void fwe_start (if_t);
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static int fwe_ioctl (if_t, u_long, caddr_t);
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static void fwe_init (void *);
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static void fwe_output_callback (struct fw_xfer *);
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static void fwe_as_output (struct fwe_softc *, if_t);
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static void fwe_as_input (struct fw_xferq *);
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static int fwedebug = 0;
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static int stream_ch = 1;
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static int tx_speed = 2;
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static int rx_queue_len = FWMAXQUEUE;
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static MALLOC_DEFINE(M_FWE, "if_fwe", "Ethernet over FireWire interface");
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SYSCTL_INT(_debug, OID_AUTO, if_fwe_debug, CTLFLAG_RWTUN, &fwedebug, 0, "");
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SYSCTL_DECL(_hw_firewire);
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static SYSCTL_NODE(_hw_firewire, OID_AUTO, fwe, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
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"Ethernet emulation subsystem");
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SYSCTL_INT(_hw_firewire_fwe, OID_AUTO, stream_ch, CTLFLAG_RWTUN, &stream_ch, 0,
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"Stream channel to use");
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SYSCTL_INT(_hw_firewire_fwe, OID_AUTO, tx_speed, CTLFLAG_RWTUN, &tx_speed, 0,
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"Transmission speed");
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SYSCTL_INT(_hw_firewire_fwe, OID_AUTO, rx_queue_len, CTLFLAG_RWTUN, &rx_queue_len,
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0, "Length of the receive queue");
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#ifdef DEVICE_POLLING
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static poll_handler_t fwe_poll;
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static int
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fwe_poll(if_t ifp, enum poll_cmd cmd, int count)
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{
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struct fwe_softc *fwe;
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struct firewire_comm *fc;
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if (!(if_getdrvflags(ifp) & IFF_DRV_RUNNING))
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return (0);
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fwe = ((struct fwe_eth_softc *)if_getsoftc(ifp))->fwe;
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fc = fwe->fd.fc;
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fc->poll(fc, (cmd == POLL_AND_CHECK_STATUS)?0:1, count);
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return (0);
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}
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#endif /* DEVICE_POLLING */
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static void
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fwe_identify(driver_t *driver, device_t parent)
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{
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BUS_ADD_CHILD(parent, 0, "fwe", device_get_unit(parent));
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}
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static int
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fwe_probe(device_t dev)
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{
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device_t pa;
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pa = device_get_parent(dev);
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if (device_get_unit(dev) != device_get_unit(pa)) {
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return (ENXIO);
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}
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device_set_desc(dev, "Ethernet over FireWire");
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return (0);
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}
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static int
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fwe_attach(device_t dev)
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{
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struct fwe_softc *fwe;
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if_t ifp;
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int unit, s;
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u_char eaddr[6];
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struct fw_eui64 *eui;
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fwe = ((struct fwe_softc *)device_get_softc(dev));
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unit = device_get_unit(dev);
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bzero(fwe, sizeof(struct fwe_softc));
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mtx_init(&fwe->mtx, "fwe", NULL, MTX_DEF);
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/* XXX */
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fwe->stream_ch = stream_ch;
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fwe->dma_ch = -1;
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fwe->fd.fc = device_get_ivars(dev);
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if (tx_speed < 0)
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tx_speed = fwe->fd.fc->speed;
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fwe->fd.dev = dev;
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fwe->fd.post_explore = NULL;
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fwe->eth_softc.fwe = fwe;
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fwe->pkt_hdr.mode.stream.tcode = FWTCODE_STREAM;
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fwe->pkt_hdr.mode.stream.sy = 0;
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fwe->pkt_hdr.mode.stream.chtag = fwe->stream_ch;
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/* generate fake MAC address: first and last 3bytes from eui64 */
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#define LOCAL (0x02)
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#define GROUP (0x01)
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eui = &fwe->fd.fc->eui;
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eaddr[0] = (FW_EUI64_BYTE(eui, 0) | LOCAL) & ~GROUP;
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eaddr[1] = FW_EUI64_BYTE(eui, 1);
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eaddr[2] = FW_EUI64_BYTE(eui, 2);
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eaddr[3] = FW_EUI64_BYTE(eui, 5);
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eaddr[4] = FW_EUI64_BYTE(eui, 6);
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eaddr[5] = FW_EUI64_BYTE(eui, 7);
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printf("if_fwe%d: Fake Ethernet address: "
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"%02x:%02x:%02x:%02x:%02x:%02x\n", unit,
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eaddr[0], eaddr[1], eaddr[2], eaddr[3], eaddr[4], eaddr[5]);
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/* fill the rest and attach interface */
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ifp = fwe->eth_softc.ifp = if_alloc(IFT_ETHER);
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if (ifp == NULL) {
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device_printf(dev, "can not if_alloc()\n");
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return (ENOSPC);
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}
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if_setsoftc(ifp, &fwe->eth_softc);
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if_initname(ifp, device_get_name(dev), unit);
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if_setinitfn(ifp, fwe_init);
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if_setstartfn(ifp, fwe_start);
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if_setioctlfn(ifp, fwe_ioctl);
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if_setflags(ifp, (IFF_BROADCAST|IFF_SIMPLEX|IFF_MULTICAST));
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if_setsendqlen(ifp, TX_MAX_QUEUE);
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s = splimp();
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ether_ifattach(ifp, eaddr);
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splx(s);
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/* Tell the upper layer(s) we support long frames. */
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if_setifheaderlen(ifp, sizeof(struct ether_vlan_header));
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if_setcapabilitiesbit(ifp, IFCAP_VLAN_MTU | IFCAP_POLLING, 0);
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if_setcapenablebit(ifp, IFCAP_VLAN_MTU, 0);
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FWEDEBUG(ifp, "interface created\n");
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return 0;
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}
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static void
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fwe_stop(struct fwe_softc *fwe)
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{
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struct firewire_comm *fc;
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struct fw_xferq *xferq;
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if_t ifp = fwe->eth_softc.ifp;
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struct fw_xfer *xfer, *next;
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int i;
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fc = fwe->fd.fc;
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if (fwe->dma_ch >= 0) {
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xferq = fc->ir[fwe->dma_ch];
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if (xferq->flag & FWXFERQ_RUNNING)
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fc->irx_disable(fc, fwe->dma_ch);
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xferq->flag &=
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~(FWXFERQ_MODEMASK | FWXFERQ_OPEN | FWXFERQ_STREAM |
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FWXFERQ_EXTBUF | FWXFERQ_HANDLER | FWXFERQ_CHTAGMASK);
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xferq->hand = NULL;
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for (i = 0; i < xferq->bnchunk; i++)
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m_freem(xferq->bulkxfer[i].mbuf);
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free(xferq->bulkxfer, M_FWE);
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for (xfer = STAILQ_FIRST(&fwe->xferlist); xfer != NULL;
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xfer = next) {
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next = STAILQ_NEXT(xfer, link);
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fw_xfer_free(xfer);
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}
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STAILQ_INIT(&fwe->xferlist);
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xferq->bulkxfer = NULL;
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fwe->dma_ch = -1;
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}
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if_setdrvflagbits(ifp, 0, (IFF_DRV_RUNNING | IFF_DRV_OACTIVE));
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}
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static int
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fwe_detach(device_t dev)
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{
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struct fwe_softc *fwe;
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if_t ifp;
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int s;
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fwe = device_get_softc(dev);
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ifp = fwe->eth_softc.ifp;
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#ifdef DEVICE_POLLING
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if (if_getcapenable(ifp) & IFCAP_POLLING)
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ether_poll_deregister(ifp);
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#endif
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s = splimp();
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fwe_stop(fwe);
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ether_ifdetach(ifp);
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if_free(ifp);
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splx(s);
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mtx_destroy(&fwe->mtx);
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return 0;
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}
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static void
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fwe_init(void *arg)
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{
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struct fwe_softc *fwe = ((struct fwe_eth_softc *)arg)->fwe;
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struct firewire_comm *fc;
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if_t ifp = fwe->eth_softc.ifp;
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struct fw_xferq *xferq;
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struct fw_xfer *xfer;
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struct mbuf *m;
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int i;
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FWEDEBUG(ifp, "initializing\n");
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/* XXX keep promiscoud mode */
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if_setflagbits(ifp, IFF_PROMISC, 0);
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fc = fwe->fd.fc;
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if (fwe->dma_ch < 0) {
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fwe->dma_ch = fw_open_isodma(fc, /* tx */0);
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if (fwe->dma_ch < 0)
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return;
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xferq = fc->ir[fwe->dma_ch];
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xferq->flag |= FWXFERQ_EXTBUF |
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FWXFERQ_HANDLER | FWXFERQ_STREAM;
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fwe->stream_ch = stream_ch;
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fwe->pkt_hdr.mode.stream.chtag = fwe->stream_ch;
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xferq->flag &= ~0xff;
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xferq->flag |= fwe->stream_ch & 0xff;
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/* register fwe_input handler */
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xferq->sc = (caddr_t) fwe;
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xferq->hand = fwe_as_input;
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xferq->bnchunk = rx_queue_len;
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xferq->bnpacket = 1;
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xferq->psize = MCLBYTES;
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xferq->queued = 0;
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xferq->buf = NULL;
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xferq->bulkxfer = (struct fw_bulkxfer *) malloc(
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sizeof(struct fw_bulkxfer) * xferq->bnchunk,
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M_FWE, M_WAITOK);
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STAILQ_INIT(&xferq->stvalid);
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STAILQ_INIT(&xferq->stfree);
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STAILQ_INIT(&xferq->stdma);
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xferq->stproc = NULL;
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for (i = 0; i < xferq->bnchunk; i++) {
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m = m_getcl(M_WAITOK, MT_DATA, M_PKTHDR);
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xferq->bulkxfer[i].mbuf = m;
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m->m_len = m->m_pkthdr.len = m->m_ext.ext_size;
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STAILQ_INSERT_TAIL(&xferq->stfree,
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&xferq->bulkxfer[i], link);
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}
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STAILQ_INIT(&fwe->xferlist);
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for (i = 0; i < TX_MAX_QUEUE; i++) {
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xfer = fw_xfer_alloc(M_FWE);
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if (xfer == NULL)
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break;
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xfer->send.spd = tx_speed;
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xfer->fc = fwe->fd.fc;
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xfer->sc = (caddr_t)fwe;
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xfer->hand = fwe_output_callback;
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STAILQ_INSERT_TAIL(&fwe->xferlist, xfer, link);
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}
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} else
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xferq = fc->ir[fwe->dma_ch];
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/* start dma */
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if ((xferq->flag & FWXFERQ_RUNNING) == 0)
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fc->irx_enable(fc, fwe->dma_ch);
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if_setdrvflagbits(ifp, IFF_DRV_RUNNING, 0);
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if_setdrvflagbits(ifp, 0, IFF_DRV_OACTIVE);
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#if 0
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/* attempt to start output */
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fwe_start(ifp);
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#endif
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}
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static int
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fwe_ioctl(if_t ifp, u_long cmd, caddr_t data)
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{
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struct fwe_softc *fwe = ((struct fwe_eth_softc *)if_getsoftc(ifp))->fwe;
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struct ifstat *ifs = NULL;
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int s, error;
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switch (cmd) {
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case SIOCSIFFLAGS:
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s = splimp();
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if (if_getflags(ifp) & IFF_UP) {
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if (!(if_getdrvflags(ifp) & IFF_DRV_RUNNING))
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fwe_init(&fwe->eth_softc);
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} else {
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if (if_getdrvflags(ifp) & IFF_DRV_RUNNING)
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fwe_stop(fwe);
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}
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/* XXX keep promiscoud mode */
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if_setflagbits(ifp, IFF_PROMISC, 0);
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splx(s);
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break;
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case SIOCADDMULTI:
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case SIOCDELMULTI:
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break;
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case SIOCGIFSTATUS:
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s = splimp();
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ifs = (struct ifstat *)data;
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snprintf(ifs->ascii, sizeof(ifs->ascii),
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"\tch %d dma %d\n", fwe->stream_ch, fwe->dma_ch);
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splx(s);
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break;
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case SIOCSIFCAP:
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#ifdef DEVICE_POLLING
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{
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struct ifreq *ifr = (struct ifreq *) data;
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struct firewire_comm *fc = fwe->fd.fc;
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if (ifr->ifr_reqcap & IFCAP_POLLING &&
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!(if_getcapenable(ifp) & IFCAP_POLLING)) {
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error = ether_poll_register(fwe_poll, ifp);
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if (error)
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return (error);
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/* Disable interrupts */
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fc->set_intr(fc, 0);
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if_setcapenablebit(ifp, IFCAP_POLLING, 0);
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return (error);
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}
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if (!(ifr->ifr_reqcap & IFCAP_POLLING) &&
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if_getcapenable(ifp) & IFCAP_POLLING) {
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error = ether_poll_deregister(ifp);
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/* Enable interrupts. */
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fc->set_intr(fc, 1);
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if_setcapenablebit(ifp, 0, IFCAP_POLLING);
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return (error);
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}
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}
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#endif /* DEVICE_POLLING */
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break;
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default:
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s = splimp();
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error = ether_ioctl(ifp, cmd, data);
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splx(s);
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return (error);
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}
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return (0);
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}
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static void
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fwe_output_callback(struct fw_xfer *xfer)
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{
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struct fwe_softc *fwe;
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if_t ifp;
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int s;
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fwe = (struct fwe_softc *)xfer->sc;
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ifp = fwe->eth_softc.ifp;
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/* XXX error check */
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FWEDEBUG(ifp, "resp = %d\n", xfer->resp);
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if (xfer->resp != 0)
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if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
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m_freem(xfer->mbuf);
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fw_xfer_unload(xfer);
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s = splimp();
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FWE_LOCK(fwe);
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STAILQ_INSERT_TAIL(&fwe->xferlist, xfer, link);
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FWE_UNLOCK(fwe);
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splx(s);
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/* for queue full */
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if (!if_sendq_empty(ifp))
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fwe_start(ifp);
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}
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static void
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fwe_start(if_t ifp)
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{
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struct fwe_softc *fwe = ((struct fwe_eth_softc *)if_getsoftc(ifp))->fwe;
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int s;
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FWEDEBUG(ifp, "starting\n");
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if (fwe->dma_ch < 0) {
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struct mbuf *m = NULL;
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FWEDEBUG(ifp, "not ready\n");
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s = splimp();
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do {
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m = if_dequeue(ifp);
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if (m != NULL)
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m_freem(m);
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if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
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} while (m != NULL);
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splx(s);
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return;
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}
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s = splimp();
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if_setdrvflagbits(ifp, IFF_DRV_OACTIVE, 0);
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if (!if_sendq_empty(ifp))
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|
fwe_as_output(fwe, ifp);
|
|
|
|
if_setdrvflagbits(ifp, 0, IFF_DRV_OACTIVE);
|
|
splx(s);
|
|
}
|
|
|
|
#define HDR_LEN 4
|
|
#ifndef ETHER_ALIGN
|
|
#define ETHER_ALIGN 2
|
|
#endif
|
|
/* Async. stream output */
|
|
static void
|
|
fwe_as_output(struct fwe_softc *fwe, if_t ifp)
|
|
{
|
|
struct mbuf *m;
|
|
struct fw_xfer *xfer;
|
|
struct fw_xferq *xferq;
|
|
struct fw_pkt *fp;
|
|
int i = 0;
|
|
|
|
xfer = NULL;
|
|
xferq = fwe->fd.fc->atq;
|
|
while ((xferq->queued < xferq->maxq - 1) &&
|
|
!if_sendq_empty(ifp)) {
|
|
FWE_LOCK(fwe);
|
|
xfer = STAILQ_FIRST(&fwe->xferlist);
|
|
if (xfer == NULL) {
|
|
#if 0
|
|
printf("if_fwe: lack of xfer\n");
|
|
#endif
|
|
FWE_UNLOCK(fwe);
|
|
break;
|
|
}
|
|
STAILQ_REMOVE_HEAD(&fwe->xferlist, link);
|
|
FWE_UNLOCK(fwe);
|
|
|
|
m = if_dequeue(ifp);
|
|
if (m == NULL) {
|
|
FWE_LOCK(fwe);
|
|
STAILQ_INSERT_HEAD(&fwe->xferlist, xfer, link);
|
|
FWE_UNLOCK(fwe);
|
|
break;
|
|
}
|
|
BPF_MTAP(ifp, m);
|
|
|
|
/* keep ip packet alignment for alpha */
|
|
M_PREPEND(m, ETHER_ALIGN, M_NOWAIT);
|
|
fp = &xfer->send.hdr;
|
|
*(uint32_t *)&xfer->send.hdr = *(int32_t *)&fwe->pkt_hdr;
|
|
fp->mode.stream.len = m->m_pkthdr.len;
|
|
xfer->mbuf = m;
|
|
xfer->send.pay_len = m->m_pkthdr.len;
|
|
|
|
if (fw_asyreq(fwe->fd.fc, -1, xfer) != 0) {
|
|
/* error */
|
|
if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
|
|
/* XXX set error code */
|
|
fwe_output_callback(xfer);
|
|
} else {
|
|
if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
|
|
i++;
|
|
}
|
|
}
|
|
#if 0
|
|
if (i > 1)
|
|
printf("%d queued\n", i);
|
|
#endif
|
|
if (i > 0)
|
|
xferq->start(fwe->fd.fc);
|
|
}
|
|
|
|
/* Async. stream output */
|
|
static void
|
|
fwe_as_input(struct fw_xferq *xferq)
|
|
{
|
|
struct mbuf *m, *m0;
|
|
if_t ifp;
|
|
struct fwe_softc *fwe;
|
|
struct fw_bulkxfer *sxfer;
|
|
struct fw_pkt *fp;
|
|
#if 0
|
|
u_char *c;
|
|
#endif
|
|
|
|
fwe = (struct fwe_softc *)xferq->sc;
|
|
ifp = fwe->eth_softc.ifp;
|
|
|
|
/* We do not need a lock here because the bottom half is serialized */
|
|
while ((sxfer = STAILQ_FIRST(&xferq->stvalid)) != NULL) {
|
|
STAILQ_REMOVE_HEAD(&xferq->stvalid, link);
|
|
fp = mtod(sxfer->mbuf, struct fw_pkt *);
|
|
if (fwe->fd.fc->irx_post != NULL)
|
|
fwe->fd.fc->irx_post(fwe->fd.fc, fp->mode.ld);
|
|
m = sxfer->mbuf;
|
|
|
|
/* insert new rbuf */
|
|
sxfer->mbuf = m0 = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
|
|
if (m0 != NULL) {
|
|
m0->m_len = m0->m_pkthdr.len = m0->m_ext.ext_size;
|
|
STAILQ_INSERT_TAIL(&xferq->stfree, sxfer, link);
|
|
} else
|
|
printf("%s: m_getcl failed\n", __FUNCTION__);
|
|
|
|
if (sxfer->resp != 0 || fp->mode.stream.len <
|
|
ETHER_ALIGN + sizeof(struct ether_header)) {
|
|
m_freem(m);
|
|
if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
|
|
continue;
|
|
}
|
|
|
|
m->m_data += HDR_LEN + ETHER_ALIGN;
|
|
#if 0
|
|
c = mtod(m, u_char *);
|
|
#endif
|
|
m->m_len = m->m_pkthdr.len = fp->mode.stream.len - ETHER_ALIGN;
|
|
m->m_pkthdr.rcvif = ifp;
|
|
#if 0
|
|
FWEDEBUG(ifp, "%02x %02x %02x %02x %02x %02x\n"
|
|
"%02x %02x %02x %02x %02x %02x\n"
|
|
"%02x %02x %02x %02x\n"
|
|
"%02x %02x %02x %02x\n"
|
|
"%02x %02x %02x %02x\n"
|
|
"%02x %02x %02x %02x\n",
|
|
c[0], c[1], c[2], c[3], c[4], c[5],
|
|
c[6], c[7], c[8], c[9], c[10], c[11],
|
|
c[12], c[13], c[14], c[15],
|
|
c[16], c[17], c[18], c[19],
|
|
c[20], c[21], c[22], c[23],
|
|
c[20], c[21], c[22], c[23]
|
|
);
|
|
#endif
|
|
if_input(ifp, m);
|
|
if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
|
|
}
|
|
if (STAILQ_FIRST(&xferq->stfree) != NULL)
|
|
fwe->fd.fc->irx_enable(fwe->fd.fc, fwe->dma_ch);
|
|
}
|
|
|
|
|
|
static device_method_t fwe_methods[] = {
|
|
/* device interface */
|
|
DEVMETHOD(device_identify, fwe_identify),
|
|
DEVMETHOD(device_probe, fwe_probe),
|
|
DEVMETHOD(device_attach, fwe_attach),
|
|
DEVMETHOD(device_detach, fwe_detach),
|
|
{ 0, 0 }
|
|
};
|
|
|
|
static driver_t fwe_driver = {
|
|
"fwe",
|
|
fwe_methods,
|
|
sizeof(struct fwe_softc),
|
|
};
|
|
|
|
|
|
DRIVER_MODULE(fwe, firewire, fwe_driver, 0, 0);
|
|
MODULE_VERSION(fwe, 1);
|
|
MODULE_DEPEND(fwe, firewire, 1, 1, 1);
|