Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Mechanically substitute flags from historic mbuf allocator with
malloc(9) flags in sys/dev.

Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs.

The SYSCTL_NODE macro defines a list that stores all child-elements of
that node. If there's no SYSCTL_DECL macro anywhere else, there's no
reason why it shouldn't be static.

Add new tunable 'net.link.ifqmaxlen' to set default send interface
queue length. The default value for this parameter is 50, which is
quite low for many of today's uses and the only way to modify this
parameter right now is to edit if_var.h file. Also add read-only
sysctl with the same name, so that it's possible to retrieve the
current value.

MFC after: 1 month

Use if_maddr_rlock()/if_maddr_runlock() rather than IF_ADDR_LOCK()/
IF_ADDR_UNLOCK() across network device drivers when accessing the
per-interface multicast address list, if_multiaddrs. This will
allow us to change the locking strategy without affecting our driver
programming interface or binary interface.

For two wireless drivers, remove unnecessary locking, since they
don't actually access the multicast address list.

Approved by: re (kib)
MFC after: 6 weeks

Style(9) xe(4). The MD5 sums are different, but comparing the dissassemblies
the only changes are from gcc moving some global variables around slightly.

Gah, always reset the timer for the watchdog check.

- Split the interrupt handler up into separate subroutines for rx, tx, and
MAC events.
- Use bus_*() rather than bus_space_*() and remove the bus space tag and
handle from the softc.
- Retire unused macros for examining CIS tuples.

- Change the watchdog timer logic to match other drivers that use their own
timer by keeping a once-a-second timer running that decrements a counter
similar to if_timer and reset the chip if it gets down to zero via the
decrement.
- Use IFQ_SET_MAXLEN().

Add locking and make xe(4) MPSAFE:
- Add a mutex to protect the softc and device hardware.
- Use a callout rather than a callout_handle for the media timer.
- Use a dedicated timer for managing the tx watchdog rather than if_timer.
- Fix some resource leaks if xe_attach() fails.
- Shutdown the device before detaching the driver.
- Setup the interrupt handler after ether_ifattach().

Tested by: Ian FREISLICH ianf of clue.co.za

o break newbus api: add a new argument of type driver_filter_t to
bus_setup_intr()

o add an int return code to all fast handlers

o retire INTR_FAST/IH_FAST

For more info: http://docs.freebsd.org/cgi/getmsg.cgi?fetch=465712+0+current/freebsd-current

Reviewed by: many
Approved by: re@

o Fix printf(9) formatting: do not use hardcode "0x" and "#" flags
simultaneously. Remove "#' flag to match a style of the rest of
file.

PR: kern/85477
Submitted by: Oliver Fromme

- Store pointer to the link-level address right in "struct ifnet"
rather than in ifindex_table[]; all (except one) accesses are
through ifp anyway. IF_LLADDR() works faster, and all (except
one) ifaddr_byindex() users were converted to use ifp->if_addr.

- Stop storing a (pointer to) Ethernet address in "struct arpcom",
and drop the IFP2ENADDR() macro; all users have been converted
to use IF_LLADDR() instead.

Catch up with IFP2ENADDR() type change (array -> pointer).

Propagate rename of IFF_OACTIVE and IFF_RUNNING to IFF_DRV_OACTIVE and
IFF_DRV_RUNNING, as well as the move from ifnet.if_flags to
ifnet.if_drv_flags. Device drivers are now responsible for
synchronizing access to these flags, as they are in if_drv_flags. This
helps prevent races between the network stack and device driver in
maintaining the interface flags field.

Many __FreeBSD__ and __FreeBSD_version checks maintained and continued;
some less so.

Reviewed by: pjd, bz
MFC after: 7 days

Other changes to this driver preclude its use on 4.x, so remove 4.x compat
code elsewhere in the driver.

Modify device drivers supporting multicast addresses to lock if_addr_mtx
over iteration of their multicast address lists when synchronizing the
hardware address filter with the network stack-maintained list.

Problem reported by: Ed Maste (emaste at phaedrus dot sandvine dot ca>
MFC after: 1 week

Fix a couple of leaking situations when errors happen.

Stop using OLDCARD shims. rename xe_pccard_match to xe_pccard_probe
and combine the old xe_pccard_{probe,attach} into one routine _attach.
Create a lookup function to lookup items in the table. Eliminate the
check for network cards, since many modems were eliminated by it.
Tweak a few printfs as well.

This gets many of my older cards working again CEM2, CEM28, CEM36,
etc.

Remove a duplicate assignment.

Reported by: delphij
Approved by: re (ifnet blanket)

Stop embedding struct ifnet at the top of driver softcs. Instead the
struct ifnet or the layer 2 common structure it was embedded in have
been replaced with a struct ifnet pointer to be filled by a call to the
new function, if_alloc(). The layer 2 common structure is also allocated
via if_alloc() based on the interface type. It is hung off the new
struct ifnet member, if_l2com.

This change removes the size of these structures from the kernel ABI and
will allow us to better manage them as interfaces come and go.

Other changes of note:
- Struct arpcom is no longer referenced in normal interface code.
Instead the Ethernet address is accessed via the IFP2ENADDR() macro.
To enforce this ac_enaddr has been renamed to _ac_enaddr.
- The second argument to ether_ifattach is now always the mac address
from driver private storage rather than sometimes being ac_enaddr.

Reviewed by: sobomax, sam

Start each of the license/copyright comments with /*-, minor shuffle of lines

Since if_xe doesn't contain locking or run with INTR_MPSAFE, mark
the interface as IFF_NEEDSGIANT so if_start is run holding Giant.

Replace convoluted and broken CRC calcuation with ether_crc32_le().
This should fix multicast reception.

We don't need to initialize if_output, ether_ifattach() does it
for us.

Remove improper use of if_addrhead in device drivers to check
if the link-level address has been initialized already.

The majority of modern drivers never does this and works fine, which
makes me think that the check is totally unnecessary and a residue
of cut&paste from other drivers.

This change is done to simplify locking because now almost none of the
drivers uses this field. The exceptions are "ct" "ctau" and "cx"
where i am not sure if i can remove that part.

Convert callers to the new bus_alloc_resource_any(9) API.

Submitted by: Mark Santcroos <marks@ripe.net>
Reviewed by: imp, dfr, bde

Announce ethernet MAC addresss in ether_ifattach().

Don't use caddr_t in mchash(). Also use C99 spellings over BSD ones.

Requested by: bde,imp

Try to create some sort of consistency in how the routings to find the
multicast hash are written. There are still two distinct algorithms used,
and there actually isn't any reason each driver should have its own copy
of this function as they could all share one copy of it (if it grew an
additional argument).

Disable the (currently unused) xe_reg_dump() function, until I know for
sure that it's not needed any more.

Reviewed by: imp (mentor)

Make xe_reg_dump non-static to avoid warnings (and tinerbox mail)
for now.

Convert XE_DEBUG define to hw.xe.debug sysctl, to set debug logging level
from the xe driver. Should probably be removed when current probe/attach
problems with the driver are fixed, but is useful now when requesting
diagnostic information from users.

Reviewed by: imp (mentor)

Replace the if_name and if_unit members of struct ifnet with new members
if_xname, if_dname, and if_dunit. if_xname is the name of the interface
and if_dname/unit are the driver name and instance.

This change paves the way for interface renaming and enhanced pseudo
device creation and configuration symantics.

Approved By: re (in principle)
Reviewed By: njl, imp
Tested On: i386, amd64, sparc64
Obtained From: NetBSD (if_xname)

There is no way to enter the attach routine twice with the same softc
without a detach call in between so don't try to deal with that
possiability.

This is a diff-reduction commit for the upcoming if_xname conversion.

Major update to xe driver:

- Make multicast work
- Fix (some of) the watchdog timeouts after card reset
- Add support for CE2, CEM28 and CEM33 cards
- General code cleanup

Any card that worked previously should still work, as well as a lot that
didn't.

The driver is not yet style(9) compliant; those changes are forthcoming,
once the functional changes are done.

PR: kern/50644
Reviewed by: imp
Approved by: imp

Use __FBSDID().
Also some minor style cleanups.

Remove unused variable(s).
Put XXX comment where intent is unclear.

Found by: FlexeLint

Back out M_* changes, per decision of the TRB.

Approved by: trb

The Xircom hardware always delivers received packets with the FCS appended.
Thus, mark the M_HASFCS flag so the generic ethernet layers will account
for this.

Remove M_TRYWAIT/M_WAITOK/M_WAIT. Callers should use 0.
Merge M_NOWAIT/M_DONTWAIT into a single flag M_NOWAIT.

When reading PHY regs over the i2c bus, the turnaround ACK bit
is read one clock edge too late. This bit is driven low by
slave (as any other input data bits from slave) when the clock
is LOW. The current code did read the bit after the clock was
driven high again.

Reviewed by: luoqi
MFC after: 2 weeks

network interface driver changes:

o don't strip the Ethernet header from inbound packets; pass packets
up the stack intact (required significant changes to some drivers)
o reference common definitions in net/ethernet.h (e.g. ETHER_ALIGN)
o track ether_ifattach/ether_ifdetach API changes
o track bpf changes (use BPF_TAP and BPF_MTAP)
o track vlan changes (ifnet capabilities, revised processing scheme, etc.)
o use if_input to pass packets "up"
o call ether_ioctl for default handling of ioctls

Reviewed by: many
Approved by: re

Use if_printf(ifp, "foo") instead of printf("xe%d: foo", ifp->it_unit).

Remove an unused variable.

Update xe driver to probe and attach in a NEWCARD kernel.
And separate probe and attach routine for PC Card from if_xe.c
to if_xe_pccard.c.

Reviewed by: imp

Add some seat belts. If we set the error rc, then return it and don't
pretend things succeeded. This can happen if the address returned
form bus_alloc_resource for the cis memory is occupied by some of
thing.

Convert if_multiaddrs from LIST to TAILQ so that it can be traversed
backwards in the three drivers which want to do that.

Reviewed by: mikeh

Mechanical change to use <sys/queue.h> macro API instead of
fondling implementation details.

Created with: sed(1)
Reviewed by: md5(1)

Tag unused functions with __unused.

select() DKI is now in <sys/selinfo.h>.

Remove unneeded #include <machine/clock.h>

Make all Ethernet drivers attach using ether_ifattach() and detach using
ether_ifdetach().

The former consolidates the operations of if_attach(), ng_ether_attach(),
and bpfattach(). The latter consolidates the corresponding detach operations.

Reviewed by: julian, freebsd-net

Remove the XE_DEBUG define. It shouldn't be defined now that things
are working. Add a small blurb about XE_DEBUG as it might be useful
to some people troubelshooting problems in the future.

Submitted by: "Kevin Oberman" <oberman@es.net>

Add support for the modem side of the 56k combo card.

Submitted by: Duncan Barclay <dmlb@ragnet.demon.co.uk>

Move code to handle BPF and bridging for incoming Ethernet packets out
of the individual drivers and into the common routine ether_input().
Also, remove the (incomplete) hack for matching ethernet headers
in the ip_fw code.

The good news: net result of 1016 lines removed, and this should make
bridging now work with *all* Ethernet drivers.

The bad news: it's nearly impossible to test every driver, especially
for bridging, and I was unable to get much testing help on the mailing
lists.

Reviewed by: freebsd-net

Now that I've got reports that this works, let's turn the debugging off.
MIHIRA-san pointed out that debugging is rather big for tcpdump...

Submitted by: sanpei@sanpei.org (MIHIRA Yoshiro)

Return 0 from attach.

Submitted by: mihira-san <sanpei@sanpei.org>

First cut at adding CIS reading to xe driver. I don't have a card
that seems to be working (I have a MF card that has a 336 modem and
ethernet that the probe routine finds, but the attach fails on because
pccardd doesn't do what you'd like with MF cards all the time).

o Preliminary support for mapping the CIS by the driver.
o Modify xe driver to use this.

There's still some issues with this code, so xe can't map the cis just
yet. I'm thinking about how to resolve the issue. pccard_nbk's
pccard_alloc_resource is getting in the way.

Remove ~25 unneeded #include <sys/conf.h>
Remove ~60 unneeded #include <sys/malloc.h>

Remove #if 0'ed reference to isa_device->id_alive

Move xe driver from dev/pccard to dev/xe. Convert driver to newbus.
Driver is not functional yet, but does compile. Tests with xe cards
indicates that it doesn't panic the machine when they are present, but
fail to probe. Interface help in the pcic/pccard layers are needed to
complete this driver.

Disable old PCCARD_MODULE code.

This should fix LINT.

Prompted by: phk's explicit message about LINT breakage

Remove NBPF conditionality of bpf calls in most of our network drivers.

This means that we will not have to have a bpf and a non-bpf version
of our driver modules.

This does not open any security hole, because the bpf core isn't loadable

The drivers left unchanged are the "cross platform" drivers where the respective
maintainers are urged to DTRT, whatever that may be.

Add a couple of missing FreeBSD tags.

Restore vendor $Id$ now that it won't be clobbered.

$Id$ -> $FreeBSD$

Decommision miscfs/specfs/specdev.h. Most of it goes into <sys/conf.h>,
a few lines into <sys/vnode.h>.

Add a few fields to struct specinfo, paving the way for the fun part.

Rename bpfilter to bpf.

Wrap the definition of "XE_DEBUG" so it is overridable from the ``cc''
commandline or kernel conf file.

Fix conflicts.

Simplify cdevsw registration.

The cdevsw_add() function now finds the major number(s) in the
struct cdevsw passed to it. cdevsw_add_generic() is no longer
needed, cdevsw_add() does the same thing.

cdevsw_add() will print an message if the d_maj field looks bogus.

Remove nblkdev and nchrdev variables. Most places they were used
bogusly. Instead check a dev_t for validity by seeing if devsw()
or bdevsw() returns NULL.

Move bdevsw() and devsw() functions to kern/kern_conf.c

Bump __FreeBSD_version to 400006

This commit removes:
72 bogus makedev() calls
26 bogus SYSINIT functions

if_xe.c bogusly accessed cdevsw[], author/maintainer please fix.

I4b and vinum not changed. Patches emailed to authors. LINT
probably broken until they catch up.

if_xe* now lives in sys/dev/pccard/

Virgin import of Xircom PCCARD driver v1.19.

v1.19 (1999/04/15) updates the CEM56/REM56 support.

Current bugs & misfeatures
--------------------------
* CE2 cards still not working reliably. Unclear if this is related to
packet I/O code or interrupt handling.
* Autonegotiation support remains flaky. We're now OK with 10Mbit auto
hubs, but certain combination of hardware will fail to connect.

Developed by: Scott Mitchell <scott@uk.freebsd.org>
Obtained from: http://www.freebsd-uk.eu.org/~scott/xe_drv/

Virgin import of Xircom PCCARD driver v1.18

v1.18 (1999/04/08) adds support for CEM56 and REM56 multifunction cards.

Developed by: Scott Mitchell <scott@uk.freebsd.org>
Obtained from: http://www.freebsd-uk.eu.org/~scott/xe_drv/

Virgin import of Xircom PCCARD driver v1.17

v1.17 (1999/03/28) has xperimental fixes to 10Mbit autonegotiation and
CE2 input lockup.

KNOWN BUGS
==========

* Media auto-negotiation is definitely not right. It will work in most
circumstances and seems to connect OK to most 100Mbit networks, however some
pathological combinations of hubs/networks/peers seem to confuse it.

* CE2 support is somewhat flakey (ranging from 'works perfectly' to 'hangs the
machine' so far). I've fixed the probe routine and a potential lockup in
the output routine, but a lot of people still report that they can't receive
or transmit.

* You won't be able to use the modem and Ethenet parts of a multifunction card
simultaneously. This is limitation the current FreeBSD PCMCIA support.
Likewise, there is no support for CardBus devices.

Developed by: Scott Mitchell <scott@uk.freebsd.org>
Obtained from: http://www.freebsd-uk.eu.org/~scott/xe_drv/

Virgin import of Xircom PCCARD driver v1.16.

v1.16 (1999/03/08) fixed BPF input hang and infinite loop on CE2
short-packet output.

Developed by: Scott Mitchell <scott@uk.freebsd.org>
Obtained from: http://www.freebsd-uk.eu.org/~scott/xe_drv/

Virgin import of Xircom PCCARD driver v1.15

v1.15 fixed driver registration bug under 3.1-STABLE.

Developed by: Scott Mitchell <scott@uk.freebsd.org>
Obtained from: http://www.freebsd-uk.eu.org/~scott/xe_drv/

Virgin import of Xircom PCCARD driver v1.14

This driver is mostly based on the `xirc2ps' driver for Linux by Werner
Koch. Werner has even allowed his code to be distributed under a BSD licence,
making our life considerably easier -- thanks Werner!

This driver supports:
* Intel EtherExpress(TM) PRO/100 PCCARD (16-bit version)
* Xircom CreditCard CE2 / CEM28 / CEM33 / CE3 / CEM56 Ethernet adapters.
* Toshiba Advanced Network 10/100 PCCARD
* Certain Compaq Netelligent 10/100 branded cards

v1.14 has major changes to media selection code, and bugfixes in the
probe routine.

Developed by: Scott Mitchell <scott@uk.freebsd.org>
Obtained from: http://www.freebsd-uk.eu.org/~scott/xe_drv/

Virgin import of Xircom PCCARD driver v1.13