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NetBSD/sys/dev/pcmcia/if_cnw.c
dyoung de87fe677d *** Summary *** 
When a link-layer address changes (e.g., ifconfig ex0 link
02🇩🇪ad:be:ef:02 active), send a gratuitous ARP and/or a Neighbor
Advertisement to update the network-/link-layer address bindings
on our LAN peers.

Refuse a change of ethernet address to the address 00:00:00:00:00:00
or to any multicast/broadcast address.  (Thanks matt@.)

Reorder ifnet ioctl operations so that driver ioctls may inherit
the functions of their "class"---ether_ioctl(), fddi_ioctl(), et
cetera---and the class ioctls may inherit from the generic ioctl,
ifioctl_common(), but both driver- and class-ioctls may override
the generic behavior.  Make network drivers share more code.

Distinguish a "factory" link-layer address from others for the
purposes of both protecting that address from deletion and computing
EUI64.

Return consistent, appropriate error codes from network drivers.

Improve readability.  KNF.

*** Details ***

In if_attach(), always initialize the interface ioctl routine,
ifnet->if_ioctl, if the driver has not already initialized it.
Delete if_ioctl == NULL tests everywhere else, because it cannot
happen.

In the ioctl routines of network interfaces, inherit common ioctl
behaviors by calling either ifioctl_common() or whichever ioctl
routine is appropriate for the class of interface---e.g., ether_ioctl()
for ethernets.

Stop (ab)using SIOCSIFADDR and start to use SIOCINITIFADDR.  In
the user->kernel interface, SIOCSIFADDR's argument was an ifreq,
but on the protocol->ifnet interface, SIOCSIFADDR's argument was
an ifaddr.  That was confusing, and it would work against me as I
make it possible for a network interface to overload most ioctls.
On the protocol->ifnet interface, replace SIOCSIFADDR with
SIOCINITIFADDR.  In ifioctl(), return EPERM if userland tries to
invoke SIOCINITIFADDR.

In ifioctl(), give the interface the first shot at handling most
interface ioctls, and give the protocol the second shot, instead
of the other way around. Finally, let compatibility code (COMPAT_OSOCK)
take a shot.

Pull device initialization out of switch statements under
SIOCINITIFADDR.  For example, pull ..._init() out of any switch
statement that looks like this:

        switch (...->sa_family) {
        case ...:
                ..._init();
                ...
                break;
        ...
        default:
                ..._init();
                ...
                break;
        }

Rewrite many if-else clauses that handle all permutations of IFF_UP
and IFF_RUNNING to use a switch statement,

        switch (x & (IFF_UP|IFF_RUNNING)) {
        case 0:
                ...
                break;
        case IFF_RUNNING:
                ...
                break;
        case IFF_UP:
                ...
                break;
        case IFF_UP|IFF_RUNNING:
                ...
                break;
        }

unifdef lots of code containing #ifdef FreeBSD, #ifdef NetBSD, and
#ifdef SIOCSIFMTU, especially in fwip(4) and in ndis(4).

In ipw(4), remove an if_set_sadl() call that is out of place.

In nfe(4), reuse the jumbo MTU logic in ether_ioctl().

Let ethernets register a callback for setting h/w state such as
promiscuous mode and the multicast filter in accord with a change
in the if_flags: ether_set_ifflags_cb() registers a callback that
returns ENETRESET if the caller should reset the ethernet by calling
if_init(), 0 on success, != 0 on failure.  Pull common code from
ex(4), gem(4), nfe(4), sip(4), tlp(4), vge(4) into ether_ioctl(),
and register if_flags callbacks for those drivers.

Return ENOTTY instead of EINVAL for inappropriate ioctls.  In
zyd(4), use ENXIO instead of ENOTTY to indicate that the device is
not any longer attached.

Add to if_set_sadl() a boolean 'factory' argument that indicates
whether a link-layer address was assigned by the factory or some
other source.  In a comment, recommend using the factory address
for generating an EUI64, and update in6_get_hw_ifid() to prefer a
factory address to any other link-layer address.

Add a routing message, RTM_LLINFO_UPD, that tells protocols to
update the binding of network-layer addresses to link-layer addresses.
Implement this message in IPv4 and IPv6 by sending a gratuitous
ARP or a neighbor advertisement, respectively.  Generate RTM_LLINFO_UPD
messages on a change of an interface's link-layer address.

In ether_ioctl(), do not let SIOCALIFADDR set a link-layer address
that is broadcast/multicast or equal to 00:00:00:00:00:00.

Make ether_ioctl() call ifioctl_common() to handle ioctls that it
does not understand.

In gif(4), initialize if_softc and use it, instead of assuming that
the gif_softc and ifp overlap.

Let ifioctl_common() handle SIOCGIFADDR.

Sprinkle rtcache_invariants(), which checks on DIAGNOSTIC kernels
that certain invariants on a struct route are satisfied.

In agr(4), rewrite agr_ioctl_filter() to be a bit more explicit
about the ioctls that we do not allow on an agr(4) member interface.

bzero -> memset.  Delete unnecessary casts to void *.  Use
sockaddr_in_init() and sockaddr_in6_init().  Compare pointers with
NULL instead of "testing truth".  Replace some instances of (type
*)0 with NULL.  Change some K&R prototypes to ANSI C, and join
lines.
2008-11-07 00:20:01 +00:00

1242 lines
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/* $NetBSD: if_cnw.c,v 1.45 2008/11/07 00:20:12 dyoung Exp $ */
/*-
* Copyright (c) 1998, 2004 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Michael Eriksson.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Copyright (c) 1996, 1997 Berkeley Software Design, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that this notice is retained,
* the conditions in the following notices are met, and terms applying
* to contributors in the following notices also apply to Berkeley
* Software Design, Inc.
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by
* Berkeley Software Design, Inc.
* 4. Neither the name of the Berkeley Software Design, Inc. nor the names
* of its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN, INC. ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL BERKELEY SOFTWARE DESIGN, INC. BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Paul Borman, December 1996
*
* This driver is derived from a generic frame work which is
* Copyright(c) 1994,1995,1996
* Yoichi Shinoda, Yoshitaka Tokugawa, WIDE Project, Wildboar Project
* and Foretune. All rights reserved.
*
* A linux driver was used as the "hardware reference manual" (i.e.,
* to determine registers and a general outline of how the card works)
* That driver is publically available and copyright
*
* John Markus Bj<42>rndalen
* Department of Computer Science
* University of Troms<6D>
* Norway
* johnm@staff.cs.uit.no, http://www.cs.uit.no/~johnm/
*/
/*
* This is a driver for the Xircom CreditCard Netwave (also known as
* the Netwave Airsurfer) wireless LAN PCMCIA adapter.
*
* When this driver was developed, the Linux Netwave driver was used
* as a hardware manual. That driver is Copyright (c) 1997 University
* of Troms<6D>, Norway. It is part of the Linux pcmcia-cs package that
* can be found at http://pcmcia-cs.sourceforge.net/. The most recent
* version of the pcmcia-cs package when this driver was written was
* 3.0.6.
*
* Unfortunately, a lot of explicit numeric constants were used in the
* Linux driver. I have tried to use symbolic names whenever possible,
* but since I don't have any real hardware documentation, there's
* still one or two "magic numbers" :-(.
*
* Driver limitations: This driver doesn't do multicasting or receiver
* promiscuity, because of missing hardware documentation. I couldn't
* get receiver promiscuity to work, and I haven't even tried
* multicast. Volunteers are welcome, of course :-).
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_cnw.c,v 1.45 2008/11/07 00:20:12 dyoung Exp $");
#include "opt_inet.h"
#include "bpfilter.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/socket.h>
#include <sys/mbuf.h>
#include <sys/ioctl.h>
#include <sys/proc.h>
#include <sys/kauth.h>
#include <net/if.h>
#include <dev/pcmcia/if_cnwreg.h>
#include <dev/pcmcia/if_cnwioctl.h>
#include <dev/pcmcia/pcmciareg.h>
#include <dev/pcmcia/pcmciavar.h>
#include <dev/pcmcia/pcmciadevs.h>
#include <net/if_dl.h>
#include <net/if_ether.h>
#ifdef INET
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#include <netinet/if_inarp.h>
#endif
#if NBPFILTER > 0
#include <net/bpf.h>
#include <net/bpfdesc.h>
#endif
/*
* Let these be patchable variables, initialized from macros that can
* be set in the kernel config file. Someone with lots of spare time
* could probably write a nice Netwave configuration program to do
* this a little bit more elegantly :-).
*/
#ifndef CNW_DOMAIN
#define CNW_DOMAIN 0x100
#endif
int cnw_domain = CNW_DOMAIN; /* Domain */
#ifndef CNW_SCRAMBLEKEY
#define CNW_SCRAMBLEKEY 0
#endif
int cnw_skey = CNW_SCRAMBLEKEY; /* Scramble key */
/*
* The card appears to work much better when we only allow one packet
* "in the air" at a time. This is done by not allowing another packet
* on the card, even if there is room. Turning this off will allow the
* driver to stuff packets on the card as soon as a transmit buffer is
* available. This does increase the number of collisions, though.
* We can que a second packet if there are transmit buffers available,
* but we do not actually send the packet until the last packet has
* been written.
*/
#define ONE_AT_A_TIME
/*
* Netwave cards choke if we try to use io memory address >= 0x400.
* Even though, CIS tuple does not talk about this.
* Use memory mapped access.
*/
#define MEMORY_MAPPED
int cnw_match(struct device *, struct cfdata *, void *);
void cnw_attach(struct device *, struct device *, void *);
int cnw_detach(struct device *, int);
int cnw_activate(struct device *, enum devact);
struct cnw_softc {
struct device sc_dev; /* Device glue (must be first) */
struct ethercom sc_ethercom; /* Ethernet common part */
int sc_domain; /* Netwave domain */
int sc_skey; /* Netwave scramble key */
struct cnwstats sc_stats;
/* PCMCIA-specific stuff */
struct pcmcia_function *sc_pf; /* PCMCIA function */
#ifndef MEMORY_MAPPED
struct pcmcia_io_handle sc_pcioh; /* PCMCIA I/O space handle */
int sc_iowin; /* ...window */
bus_space_tag_t sc_iot; /* ...bus_space tag */
bus_space_handle_t sc_ioh; /* ...bus_space handle */
#endif
struct pcmcia_mem_handle sc_pcmemh; /* PCMCIA memory handle */
bus_size_t sc_memoff; /* ...offset */
int sc_memwin; /* ...window */
bus_space_tag_t sc_memt; /* ...bus_space tag */
bus_space_handle_t sc_memh; /* ...bus_space handle */
void *sc_ih; /* Interrupt cookie */
struct timeval sc_txlast; /* When the last xmit was made */
int sc_active; /* Currently xmitting a packet */
int sc_resource; /* Resources alloc'ed on attach */
#define CNW_RES_PCIC 1
#define CNW_RES_IO 2
#define CNW_RES_MEM 4
#define CNW_RES_NET 8
};
CFATTACH_DECL(cnw, sizeof(struct cnw_softc),
cnw_match, cnw_attach, cnw_detach, cnw_activate);
void cnw_reset(struct cnw_softc *);
void cnw_init(struct cnw_softc *);
int cnw_enable(struct cnw_softc *sc);
void cnw_disable(struct cnw_softc *sc);
void cnw_config(struct cnw_softc *sc, u_int8_t *);
void cnw_start(struct ifnet *);
void cnw_transmit(struct cnw_softc *, struct mbuf *);
struct mbuf *cnw_read(struct cnw_softc *);
void cnw_recv(struct cnw_softc *);
int cnw_intr(void *arg);
int cnw_ioctl(struct ifnet *, u_long, void *);
void cnw_watchdog(struct ifnet *);
static int cnw_setdomain(struct cnw_softc *, int);
static int cnw_setkey(struct cnw_softc *, int);
/* ---------------------------------------------------------------- */
/* Help routines */
static int wait_WOC(struct cnw_softc *, int);
static int read16(struct cnw_softc *, int);
static int cnw_cmd(struct cnw_softc *, int, int, int, int);
/*
* Wait until the WOC (Write Operation Complete) bit in the
* ASR (Adapter Status Register) is asserted.
*/
static int
wait_WOC(sc, line)
struct cnw_softc *sc;
int line;
{
int i, asr;
for (i = 0; i < 5000; i++) {
#ifndef MEMORY_MAPPED
asr = bus_space_read_1(sc->sc_iot, sc->sc_ioh, CNW_REG_ASR);
#else
asr = bus_space_read_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_IOM_OFF + CNW_REG_ASR);
#endif
if (asr & CNW_ASR_WOC)
return (0);
DELAY(100);
}
if (line > 0)
printf("%s: wedged at line %d\n", device_xname(&sc->sc_dev), line);
return (1);
}
#define WAIT_WOC(sc) wait_WOC(sc, __LINE__)
/*
* Read a 16 bit value from the card.
*/
static int
read16(sc, offset)
struct cnw_softc *sc;
int offset;
{
int hi, lo;
int offs = sc->sc_memoff + offset;
/* This could presumably be done more efficient with
* bus_space_read_2(), but I don't know anything about the
* byte sex guarantees... Besides, this is pretty cheap as
* well :-)
*/
lo = bus_space_read_1(sc->sc_memt, sc->sc_memh, offs);
hi = bus_space_read_1(sc->sc_memt, sc->sc_memh, offs + 1);
return ((hi << 8) | lo);
}
/*
* Send a command to the card by writing it to the command buffer.
*/
int
cnw_cmd(sc, cmd, count, arg1, arg2)
struct cnw_softc *sc;
int cmd, count, arg1, arg2;
{
int ptr = sc->sc_memoff + CNW_EREG_CB;
if (wait_WOC(sc, 0)) {
printf("%s: wedged when issuing cmd 0x%x\n",
device_xname(&sc->sc_dev), cmd);
/*
* We'll continue anyway, as that's probably the best
* thing we can do; at least the user knows there's a
* problem, and can reset the interface with ifconfig
* down/up.
*/
}
bus_space_write_1(sc->sc_memt, sc->sc_memh, ptr, cmd);
if (count > 0) {
bus_space_write_1(sc->sc_memt, sc->sc_memh, ptr + 1, arg1);
if (count > 1)
bus_space_write_1(sc->sc_memt, sc->sc_memh,
ptr + 2, arg2);
}
bus_space_write_1(sc->sc_memt, sc->sc_memh,
ptr + count + 1, CNW_CMD_EOC);
return (0);
}
#define CNW_CMD0(sc, cmd) \
do { cnw_cmd(sc, cmd, 0, 0, 0); } while (0)
#define CNW_CMD1(sc, cmd, arg1) \
do { cnw_cmd(sc, cmd, 1, arg1 , 0); } while (0)
#define CNW_CMD2(sc, cmd, arg1, arg2) \
do { cnw_cmd(sc, cmd, 2, arg1, arg2); } while (0)
/* ---------------------------------------------------------------- */
/*
* Reset the hardware.
*/
void
cnw_reset(sc)
struct cnw_softc *sc;
{
#ifdef CNW_DEBUG
if (sc->sc_ethercom.ec_if.if_flags & IFF_DEBUG)
printf("%s: resetting\n", device_xname(&sc->sc_dev));
#endif
wait_WOC(sc, 0);
#ifndef MEMORY_MAPPED
bus_space_write_1(sc->sc_iot, sc->sc_ioh, CNW_REG_PMR, CNW_PMR_RESET);
#else
bus_space_write_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_IOM_OFF + CNW_REG_PMR, CNW_PMR_RESET);
#endif
bus_space_write_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_EREG_ASCC, CNW_ASR_WOC);
#ifndef MEMORY_MAPPED
bus_space_write_1(sc->sc_iot, sc->sc_ioh, CNW_REG_PMR, 0);
#else
bus_space_write_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_IOM_OFF + CNW_REG_PMR, 0);
#endif
}
/*
* Initialize the card.
*/
void
cnw_init(sc)
struct cnw_softc *sc;
{
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
const u_int8_t rxmode =
CNW_RXCONF_RXENA | CNW_RXCONF_BCAST | CNW_RXCONF_AMP;
/* Reset the card */
cnw_reset(sc);
/* Issue a NOP to check the card */
CNW_CMD0(sc, CNW_CMD_NOP);
/* Set up receive configuration */
CNW_CMD1(sc, CNW_CMD_SRC,
rxmode | ((ifp->if_flags & IFF_PROMISC) ? CNW_RXCONF_PRO : 0));
/* Set up transmit configuration */
CNW_CMD1(sc, CNW_CMD_STC, CNW_TXCONF_TXENA);
/* Set domain */
CNW_CMD2(sc, CNW_CMD_SMD, sc->sc_domain, sc->sc_domain >> 8);
/* Set scramble key */
CNW_CMD2(sc, CNW_CMD_SSK, sc->sc_skey, sc->sc_skey >> 8);
/* Enable interrupts */
WAIT_WOC(sc);
#ifndef MEMORY_MAPPED
bus_space_write_1(sc->sc_iot, sc->sc_ioh,
CNW_REG_IMR, CNW_IMR_IENA | CNW_IMR_RFU1);
#else
bus_space_write_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_IOM_OFF + CNW_REG_IMR,
CNW_IMR_IENA | CNW_IMR_RFU1);
#endif
/* Enable receiver */
CNW_CMD0(sc, CNW_CMD_ER);
/* "Set the IENA bit in COR" */
WAIT_WOC(sc);
#ifndef MEMORY_MAPPED
bus_space_write_1(sc->sc_iot, sc->sc_ioh, CNW_REG_COR,
CNW_COR_IENA | CNW_COR_LVLREQ);
#else
bus_space_write_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_IOM_OFF + CNW_REG_COR,
CNW_COR_IENA | CNW_COR_LVLREQ);
#endif
}
/*
* Enable and initialize the card.
*/
int
cnw_enable(sc)
struct cnw_softc *sc;
{
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
if ((ifp->if_flags & IFF_RUNNING) != 0)
return (0);
sc->sc_ih = pcmcia_intr_establish(sc->sc_pf, IPL_NET, cnw_intr, sc);
if (sc->sc_ih == NULL) {
aprint_error_dev(&sc->sc_dev, "couldn't establish interrupt handler\n");
return (EIO);
}
if (pcmcia_function_enable(sc->sc_pf) != 0) {
aprint_error_dev(&sc->sc_dev, "couldn't enable card\n");
return (EIO);
}
sc->sc_resource |= CNW_RES_PCIC;
cnw_init(sc);
ifp->if_flags &= ~IFF_OACTIVE;
ifp->if_flags |= IFF_RUNNING;
return (0);
}
/*
* Stop and disable the card.
*/
void
cnw_disable(sc)
struct cnw_softc *sc;
{
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
if ((ifp->if_flags & IFF_RUNNING) == 0)
return;
pcmcia_function_disable(sc->sc_pf);
sc->sc_resource &= ~CNW_RES_PCIC;
pcmcia_intr_disestablish(sc->sc_pf, sc->sc_ih);
ifp->if_flags &= ~IFF_RUNNING;
ifp->if_timer = 0;
}
/*
* Match the hardware we handle.
*/
int
cnw_match(struct device *parent, struct cfdata *match,
void *aux)
{
struct pcmcia_attach_args *pa = aux;
if (pa->manufacturer == PCMCIA_VENDOR_XIRCOM &&
pa->product == PCMCIA_PRODUCT_XIRCOM_CNW_801)
return 1;
if (pa->manufacturer == PCMCIA_VENDOR_XIRCOM &&
pa->product == PCMCIA_PRODUCT_XIRCOM_CNW_802)
return 1;
return 0;
}
/*
* Attach the card.
*/
void
cnw_attach(struct device *parent, struct device *self, void *aux)
{
struct cnw_softc *sc = (void *) self;
struct pcmcia_attach_args *pa = aux;
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
u_int8_t macaddr[ETHER_ADDR_LEN];
int i;
bus_size_t memsize;
sc->sc_resource = 0;
/* Enable the card */
sc->sc_pf = pa->pf;
pcmcia_function_init(sc->sc_pf, SIMPLEQ_FIRST(&sc->sc_pf->cfe_head));
if (pcmcia_function_enable(sc->sc_pf)) {
aprint_error_dev(self, "function enable failed\n");
return;
}
sc->sc_resource |= CNW_RES_PCIC;
/* Map I/O register and "memory" */
#ifndef MEMORY_MAPPED
if (pcmcia_io_alloc(sc->sc_pf, 0, CNW_IO_SIZE, CNW_IO_SIZE,
&sc->sc_pcioh) != 0) {
aprint_error_dev(self, "can't allocate i/o space\n");
goto fail;
}
if (pcmcia_io_map(sc->sc_pf, PCMCIA_WIDTH_IO16, &sc->sc_pcioh,
&sc->sc_iowin) != 0) {
aprint_error_dev(self, "can't map i/o space\n");
pcmcia_io_free(sc->sc_pf, &sc->sc_pcioh);
goto fail;
}
sc->sc_iot = sc->sc_pcioh.iot;
sc->sc_ioh = sc->sc_pcioh.ioh;
sc->sc_resource |= CNW_RES_IO;
#endif
#ifndef MEMORY_MAPPED
memsize = CNW_MEM_SIZE;
#else
memsize = CNW_MEM_SIZE + CNW_IOM_SIZE;
#endif
if (pcmcia_mem_alloc(sc->sc_pf, memsize, &sc->sc_pcmemh) != 0) {
aprint_error_dev(self, "can't allocate memory\n");
goto fail;
}
if (pcmcia_mem_map(sc->sc_pf, PCMCIA_WIDTH_MEM8|PCMCIA_MEM_COMMON,
CNW_MEM_ADDR, memsize, &sc->sc_pcmemh, &sc->sc_memoff,
&sc->sc_memwin) != 0) {
aprint_error_dev(self, "can't map memory\n");
pcmcia_mem_free(sc->sc_pf, &sc->sc_pcmemh);
goto fail;
}
sc->sc_memt = sc->sc_pcmemh.memt;
sc->sc_memh = sc->sc_pcmemh.memh;
sc->sc_resource |= CNW_RES_MEM;
/* Finish setup of softc */
sc->sc_domain = cnw_domain;
sc->sc_skey = cnw_skey;
/* Get MAC address */
cnw_reset(sc);
for (i = 0; i < ETHER_ADDR_LEN; i++)
macaddr[i] = bus_space_read_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_EREG_PA + i);
printf("%s: address %s\n", device_xname(&sc->sc_dev),
ether_sprintf(macaddr));
/* Set up ifnet structure */
strlcpy(ifp->if_xname, device_xname(&sc->sc_dev), IFNAMSIZ);
ifp->if_softc = sc;
ifp->if_start = cnw_start;
ifp->if_ioctl = cnw_ioctl;
ifp->if_watchdog = cnw_watchdog;
ifp->if_flags = IFF_BROADCAST | IFF_MULTICAST | IFF_SIMPLEX |
IFF_NOTRAILERS;
IFQ_SET_READY(&ifp->if_snd);
/* Attach the interface */
if_attach(ifp);
ether_ifattach(ifp, macaddr);
sc->sc_resource |= CNW_RES_NET;
ifp->if_baudrate = IF_Mbps(1);
/* Disable the card now, and turn it on when the interface goes up */
pcmcia_function_disable(sc->sc_pf);
sc->sc_resource &= ~CNW_RES_PCIC;
return;
fail:
#ifndef MEMORY_MAPPED
if ((sc->sc_resource & CNW_RES_IO) != 0) {
pcmcia_io_unmap(sc->sc_pf, sc->sc_iowin);
pcmcia_io_free(sc->sc_pf, &sc->sc_pcioh);
sc->sc_resource &= ~CNW_RES_IO;
}
#endif
if ((sc->sc_resource & CNW_RES_PCIC) != 0) {
pcmcia_function_disable(sc->sc_pf);
sc->sc_resource &= ~CNW_RES_PCIC;
}
}
/*
* Start outputting on the interface.
*/
void
cnw_start(ifp)
struct ifnet *ifp;
{
struct cnw_softc *sc = ifp->if_softc;
struct mbuf *m0;
int lif;
int asr;
#ifdef ONE_AT_A_TIME
struct timeval now;
#endif
#ifdef CNW_DEBUG
if (sc->sc_ethercom.ec_if.if_flags & IFF_DEBUG)
printf("%s: cnw_start\n", ifp->if_xname);
if (ifp->if_flags & IFF_OACTIVE)
printf("%s: cnw_start reentered\n", ifp->if_xname);
#endif
ifp->if_flags |= IFF_OACTIVE;
for (;;) {
#ifdef ONE_AT_A_TIME
microtime(&now);
now.tv_sec -= sc->sc_txlast.tv_sec;
now.tv_usec -= sc->sc_txlast.tv_usec;
if (now.tv_usec < 0) {
now.tv_usec += 1000000;
now.tv_sec--;
}
/*
* Don't ship this packet out until the last
* packet has left the building.
* If we have not tried to send a packet for 1/5
* a second then we assume we lost an interrupt,
* lets go on and send the next packet anyhow.
*
* I suppose we could check to see if it is okay
* to put additional packets on the card (beyond
* the one already waiting to be sent) but I don't
* think we would get any improvement in speed as
* we should have ample time to put the next packet
* on while this one is going out.
*/
if (sc->sc_active && now.tv_sec == 0 && now.tv_usec < 200000)
break;
#endif
/* Make sure the link integrity field is on */
WAIT_WOC(sc);
lif = bus_space_read_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_EREG_LIF);
if (lif == 0) {
#ifdef CNW_DEBUG
if (sc->sc_ethercom.ec_if.if_flags & IFF_DEBUG)
printf("%s: link integrity %d\n", ifp->if_xname, lif);
#endif
break;
}
/* Is there any buffer space available on the card? */
WAIT_WOC(sc);
#ifndef MEMORY_MAPPED
asr = bus_space_read_1(sc->sc_iot, sc->sc_ioh, CNW_REG_ASR);
#else
asr = bus_space_read_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_IOM_OFF + CNW_REG_ASR);
#endif
if (!(asr & CNW_ASR_TXBA)) {
#ifdef CNW_DEBUG
if (sc->sc_ethercom.ec_if.if_flags & IFF_DEBUG)
printf("%s: no buffer space\n", ifp->if_xname);
#endif
break;
}
sc->sc_stats.nws_tx++;
IFQ_DEQUEUE(&ifp->if_snd, m0);
if (m0 == 0)
break;
#if NBPFILTER > 0
if (ifp->if_bpf)
bpf_mtap(ifp->if_bpf, m0);
#endif
cnw_transmit(sc, m0);
++ifp->if_opackets;
ifp->if_timer = 3; /* start watchdog timer */
microtime(&sc->sc_txlast);
sc->sc_active = 1;
}
ifp->if_flags &= ~IFF_OACTIVE;
}
/*
* Transmit a packet.
*/
void
cnw_transmit(sc, m0)
struct cnw_softc *sc;
struct mbuf *m0;
{
int buffer, bufsize, bufoffset, bufptr, bufspace, len, mbytes, n;
struct mbuf *m;
u_int8_t *mptr;
/* Get buffer info from card */
buffer = read16(sc, CNW_EREG_TDP);
bufsize = read16(sc, CNW_EREG_TDP + 2);
bufoffset = read16(sc, CNW_EREG_TDP + 4);
#ifdef CNW_DEBUG
if (sc->sc_ethercom.ec_if.if_flags & IFF_DEBUG)
printf("%s: cnw_transmit b=0x%x s=%d o=0x%x\n",
device_xname(&sc->sc_dev), buffer, bufsize, bufoffset);
#endif
/* Copy data from mbuf chain to card buffers */
bufptr = sc->sc_memoff + buffer + bufoffset;
bufspace = bufsize;
len = 0;
for (m = m0; m; ) {
mptr = mtod(m, u_int8_t *);
mbytes = m->m_len;
len += mbytes;
while (mbytes > 0) {
if (bufspace == 0) {
buffer = read16(sc, buffer);
bufptr = sc->sc_memoff + buffer + bufoffset;
bufspace = bufsize;
#ifdef CNW_DEBUG
if (sc->sc_ethercom.ec_if.if_flags & IFF_DEBUG)
printf("%s: next buffer @0x%x\n",
device_xname(&sc->sc_dev), buffer);
#endif
}
n = mbytes <= bufspace ? mbytes : bufspace;
bus_space_write_region_1(sc->sc_memt, sc->sc_memh,
bufptr, mptr, n);
bufptr += n;
bufspace -= n;
mptr += n;
mbytes -= n;
}
MFREE(m, m0);
m = m0;
}
/* Issue transmit command */
CNW_CMD2(sc, CNW_CMD_TL, len, len >> 8);
}
/*
* Pull a packet from the card into an mbuf chain.
*/
struct mbuf *
cnw_read(sc)
struct cnw_softc *sc;
{
struct mbuf *m, *top, **mp;
int totbytes, buffer, bufbytes, bufptr, mbytes, n;
u_int8_t *mptr;
WAIT_WOC(sc);
totbytes = read16(sc, CNW_EREG_RDP);
#ifdef CNW_DEBUG
if (sc->sc_ethercom.ec_if.if_flags & IFF_DEBUG)
printf("%s: recv %d bytes\n", device_xname(&sc->sc_dev), totbytes);
#endif
buffer = CNW_EREG_RDP + 2;
bufbytes = 0;
bufptr = 0; /* XXX make gcc happy */
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == 0)
return (0);
m->m_pkthdr.rcvif = &sc->sc_ethercom.ec_if;
m->m_pkthdr.len = totbytes;
mbytes = MHLEN;
top = 0;
mp = &top;
while (totbytes > 0) {
if (top) {
MGET(m, M_DONTWAIT, MT_DATA);
if (m == 0) {
m_freem(top);
return (0);
}
mbytes = MLEN;
}
if (totbytes >= MINCLSIZE) {
MCLGET(m, M_DONTWAIT);
if ((m->m_flags & M_EXT) == 0) {
m_free(m);
m_freem(top);
return (0);
}
mbytes = MCLBYTES;
}
if (!top) {
int pad = ALIGN(sizeof(struct ether_header)) -
sizeof(struct ether_header);
m->m_data += pad;
mbytes -= pad;
}
mptr = mtod(m, u_int8_t *);
mbytes = m->m_len = min(totbytes, mbytes);
totbytes -= mbytes;
while (mbytes > 0) {
if (bufbytes == 0) {
buffer = read16(sc, buffer);
bufbytes = read16(sc, buffer + 2);
bufptr = sc->sc_memoff + buffer +
read16(sc, buffer + 4);
#ifdef CNW_DEBUG
if (sc->sc_ethercom.ec_if.if_flags & IFF_DEBUG)
printf("%s: %d bytes @0x%x+0x%lx\n",
device_xname(&sc->sc_dev), bufbytes,
buffer, bufptr - buffer -
sc->sc_memoff);
#endif
}
n = mbytes <= bufbytes ? mbytes : bufbytes;
bus_space_read_region_1(sc->sc_memt, sc->sc_memh,
bufptr, mptr, n);
bufbytes -= n;
bufptr += n;
mbytes -= n;
mptr += n;
}
*mp = m;
mp = &m->m_next;
}
return (top);
}
/*
* Handle received packets.
*/
void
cnw_recv(sc)
struct cnw_softc *sc;
{
int rser;
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
struct mbuf *m;
for (;;) {
WAIT_WOC(sc);
rser = bus_space_read_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_EREG_RSER);
if (!(rser & CNW_RSER_RXAVAIL))
return;
/* Pull packet off card */
m = cnw_read(sc);
/* Acknowledge packet */
CNW_CMD0(sc, CNW_CMD_SRP);
/* Did we manage to get the packet from the interface? */
if (m == 0) {
++ifp->if_ierrors;
return;
}
++ifp->if_ipackets;
#if NBPFILTER > 0
if (ifp->if_bpf)
bpf_mtap(ifp->if_bpf, m);
#endif
/* Pass the packet up. */
(*ifp->if_input)(ifp, m);
}
}
/*
* Interrupt handler.
*/
int
cnw_intr(arg)
void *arg;
{
struct cnw_softc *sc = arg;
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
int ret, status, rser, tser;
if ((sc->sc_ethercom.ec_if.if_flags & IFF_RUNNING) == 0 ||
!device_is_active(&sc->sc_dev))
return (0);
ifp->if_timer = 0; /* stop watchdog timer */
ret = 0;
for (;;) {
WAIT_WOC(sc);
#ifndef MEMORY_MAPPED
status = bus_space_read_1(sc->sc_iot, sc->sc_ioh,
CNW_REG_CCSR);
#else
status = bus_space_read_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_IOM_OFF + CNW_REG_CCSR);
#endif
if (!(status & 0x02)) {
if (ret == 0)
printf("%s: spurious interrupt\n",
device_xname(&sc->sc_dev));
return (ret);
}
ret = 1;
#ifndef MEMORY_MAPPED
status = bus_space_read_1(sc->sc_iot, sc->sc_ioh, CNW_REG_ASR);
#else
status = bus_space_read_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_IOM_OFF + CNW_REG_ASR);
#endif
/* Anything to receive? */
if (status & CNW_ASR_RXRDY) {
sc->sc_stats.nws_rx++;
cnw_recv(sc);
}
/* Receive error */
if (status & CNW_ASR_RXERR) {
/*
* I get a *lot* of spurious receive errors
* (many per second), even when the interface
* is quiescent, so we don't increment
* if_ierrors here.
*/
rser = bus_space_read_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_EREG_RSER);
/* RX statistics */
sc->sc_stats.nws_rxerr++;
if (rser & CNW_RSER_RXBIG)
sc->sc_stats.nws_rxframe++;
if (rser & CNW_RSER_RXCRC)
sc->sc_stats.nws_rxcrcerror++;
if (rser & CNW_RSER_RXOVERRUN)
sc->sc_stats.nws_rxoverrun++;
if (rser & CNW_RSER_RXOVERFLOW)
sc->sc_stats.nws_rxoverflow++;
if (rser & CNW_RSER_RXERR)
sc->sc_stats.nws_rxerrors++;
if (rser & CNW_RSER_RXAVAIL)
sc->sc_stats.nws_rxavail++;
/* Clear error bits in RSER */
WAIT_WOC(sc);
bus_space_write_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_EREG_RSERW,
CNW_RSER_RXERR |
(rser & (CNW_RSER_RXCRC | CNW_RSER_RXBIG)));
/* Clear RXERR in ASR */
WAIT_WOC(sc);
bus_space_write_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_EREG_ASCC, CNW_ASR_RXERR);
}
/* Transmit done */
if (status & CNW_ASR_TXDN) {
tser = bus_space_read_1(sc->sc_memt, sc->sc_memh,
CNW_EREG_TSER);
/* TX statistics */
if (tser & CNW_TSER_TXERR)
sc->sc_stats.nws_txerrors++;
if (tser & CNW_TSER_TXNOAP)
sc->sc_stats.nws_txlostcd++;
if (tser & CNW_TSER_TXGU)
sc->sc_stats.nws_txabort++;
if (tser & CNW_TSER_TXOK) {
sc->sc_stats.nws_txokay++;
sc->sc_stats.nws_txretries[status & 0xf]++;
WAIT_WOC(sc);
bus_space_write_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_EREG_TSERW,
CNW_TSER_TXOK | CNW_TSER_RTRY);
}
if (tser & CNW_TSER_ERROR) {
++ifp->if_oerrors;
WAIT_WOC(sc);
bus_space_write_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_EREG_TSERW,
(tser & CNW_TSER_ERROR) |
CNW_TSER_RTRY);
}
sc->sc_active = 0;
ifp->if_flags &= ~IFF_OACTIVE;
/* Continue to send packets from the queue */
cnw_start(&sc->sc_ethercom.ec_if);
}
}
}
/*
* Handle device ioctls.
*/
int
cnw_ioctl(struct ifnet *ifp, u_long cmd, void *data)
{
struct cnw_softc *sc = ifp->if_softc;
struct ifaddr *ifa = (struct ifaddr *)data;
struct ifreq *ifr = (struct ifreq *)data;
int s, error = 0;
struct lwp *l = curlwp; /*XXX*/
switch (cmd) {
case SIOCINITIFADDR:
case SIOCSIFFLAGS:
case SIOCADDMULTI:
case SIOCDELMULTI:
case SIOCGCNWDOMAIN:
case SIOCGCNWSTATS:
break;
case SIOCSCNWDOMAIN:
case SIOCSCNWKEY:
case SIOCGCNWSTATUS:
error = kauth_authorize_generic(l->l_cred,
KAUTH_GENERIC_ISSUSER, NULL);
if (error)
return (error);
break;
default:
return (EINVAL);
}
s = splnet();
switch (cmd) {
case SIOCINITIFADDR:
if (!(ifp->if_flags & IFF_RUNNING) &&
(error = cnw_enable(sc)) != 0)
break;
ifp->if_flags |= IFF_UP;
cnw_init(sc);
switch (ifa->ifa_addr->sa_family) {
#ifdef INET
case AF_INET:
arp_ifinit(&sc->sc_ethercom.ec_if, ifa);
break;
#endif
default:
break;
}
break;
case SIOCSIFFLAGS:
if ((error = ifioctl_common(ifp, cmd, data)) != 0)
break;
/* XXX re-use ether_ioctl() */
switch (ifp->if_flags & (IFF_UP|IFF_RUNNING)) {
case IFF_RUNNING:
/*
* The interface is marked down and it is running, so
* stop it.
*/
cnw_disable(sc);
break;
case IFF_UP:
/*
* The interface is marked up and it is stopped, so
* start it.
*/
error = cnw_enable(sc);
break;
default:
/* IFF_PROMISC may be changed */
cnw_init(sc);
break;
}
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
/* Update our multicast list. */
if ((error = ether_ioctl(ifp, cmd, data)) == ENETRESET) {
if (ifp->if_flags & IFF_RUNNING)
cnw_init(sc);
error = 0;
}
break;
case SIOCGCNWDOMAIN:
ifr->ifr_domain = sc->sc_domain;
break;
case SIOCSCNWDOMAIN:
error = cnw_setdomain(sc, ifr->ifr_domain);
break;
case SIOCSCNWKEY:
error = cnw_setkey(sc, ifr->ifr_key);
break;
case SIOCGCNWSTATUS:
if ((ifp->if_flags & IFF_RUNNING) == 0)
break;
bus_space_read_region_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_EREG_CB,
((struct cnwstatus *)data)->data,
sizeof(((struct cnwstatus *)data)->data));
break;
case SIOCGCNWSTATS:
memcpy((void *)&(((struct cnwistats *)data)->stats),
(void *)&sc->sc_stats, sizeof(struct cnwstats));
break;
default:
error = ether_ioctl(ifp, cmd, data);
break;
}
splx(s);
return (error);
}
/*
* Device timeout/watchdog routine. Entered if the device neglects to
* generate an interrupt after a transmit has been started on it.
*/
void
cnw_watchdog(ifp)
struct ifnet *ifp;
{
struct cnw_softc *sc = ifp->if_softc;
printf("%s: device timeout; card reset\n", device_xname(&sc->sc_dev));
++ifp->if_oerrors;
cnw_init(sc);
}
int
cnw_setdomain(sc, domain)
struct cnw_softc *sc;
int domain;
{
int s;
if (domain & ~0x1ff)
return EINVAL;
s = splnet();
CNW_CMD2(sc, CNW_CMD_SMD, domain, domain >> 8);
splx(s);
sc->sc_domain = domain;
return 0;
}
int
cnw_setkey(sc, key)
struct cnw_softc *sc;
int key;
{
int s;
if (key & ~0xffff)
return EINVAL;
s = splnet();
CNW_CMD2(sc, CNW_CMD_SSK, key, key >> 8);
splx(s);
sc->sc_skey = key;
return 0;
}
int
cnw_activate(self, act)
struct device *self;
enum devact act;
{
struct cnw_softc *sc = (struct cnw_softc *)self;
int rv = 0, s;
s = splnet();
switch (act) {
case DVACT_ACTIVATE:
rv = EOPNOTSUPP;
break;
case DVACT_DEACTIVATE:
if_deactivate(&sc->sc_ethercom.ec_if);
break;
}
splx(s);
return (rv);
}
int
cnw_detach(struct device *self, int flags)
{
struct cnw_softc *sc = (struct cnw_softc *)self;
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
/* cnw_disable() checks IFF_RUNNING */
cnw_disable(sc);
if ((sc->sc_resource & CNW_RES_NET) != 0) {
ether_ifdetach(ifp);
if_detach(ifp);
}
#ifndef MEMORY_MAPPED
/* unmap and free our i/o windows */
if ((sc->sc_resource & CNW_RES_IO) != 0) {
pcmcia_io_unmap(sc->sc_pf, sc->sc_iowin);
pcmcia_io_free(sc->sc_pf, &sc->sc_pcioh);
}
#endif
/* unmap and free our memory windows */
if ((sc->sc_resource & CNW_RES_MEM) != 0) {
pcmcia_mem_unmap(sc->sc_pf, sc->sc_memwin);
pcmcia_mem_free(sc->sc_pf, &sc->sc_pcmemh);
}
return (0);
}
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