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History log of /src/sys/dev/isa/if_el.c
RevisionDateAuthorComments
 1.102  17-Sep-2022  thorpej Eliminate use of IFF_OACTIVE.
 1.101  17-Sep-2022  thorpej u_int*_t -> uint*_t
 1.100  17-Sep-2022  thorpej Liberally apply static.
 1.99  29-Jan-2020  thorpej Adopt <net/if_stats.h>.
 1.98  05-Feb-2019  msaitoh branches: 1.98.6;
Remove very old IFF_NOTRAILERS flag.
 1.97  03-Sep-2018  riastradh Rename min/max -> uimin/uimax for better honesty.

These functions are defined on unsigned int. The generic name
min/max should not silently truncate to 32 bits on 64-bit systems.
This is purely a name change -- no functional change intended.

HOWEVER! Some subsystems have

#define min(a, b) ((a) < (b) ? (a) : (b))
#define max(a, b) ((a) > (b) ? (a) : (b))

even though our standard name for that is MIN/MAX. Although these
may invite multiple evaluation bugs, these do _not_ cause integer
truncation.

To avoid `fixing' these cases, I first changed the name in libkern,
and then compile-tested every file where min/max occurred in order to
confirm that it failed -- and thus confirm that nothing shadowed
min/max -- before changing it.

I have left a handful of bootloaders that are too annoying to
compile-test, and some dead code:

cobalt ews4800mips hp300 hppa ia64 luna68k vax
acorn32/if_ie.c (not included in any kernels)
macppc/if_gm.c (superseded by gem(4))

It should be easy to fix the fallout once identified -- this way of
doing things fails safe, and the goal here, after all, is to _avoid_
silent integer truncations, not introduce them.

Maybe one day we can reintroduce min/max as type-generic things that
never silently truncate. But we should avoid doing that for a while,
so that existing code has a chance to be detected by the compiler for
conversion to uimin/uimax without changing the semantics until we can
properly audit it all. (Who knows, maybe in some cases integer
truncation is actually intended!)
 1.96  26-Jun-2018  msaitoh branches: 1.96.2;
Implement the BPF direction filter (BIOC[GS]DIRECTION). It provides backward
compatibility with BIOC[GS]SEESENT ioctl. The userland interface is the same
as FreeBSD.

This change also fixes a bug that the direction is misunderstand on some
environment by passing the direction to bpf_mtap*() instead of checking
m->m_pkthdr.rcvif.
 1.95  22-Jun-2018  msaitoh It's not required to include net/bpfdesc.h. Remove it.
 1.94  15-Dec-2016  ozaki-r branches: 1.94.8; 1.94.14;
Move bpf_mtap and if_ipackets++ on Rx of each driver to percpuq if_input

The benefits of the change are:
- We can reduce codes
- We can provide the same behavior between drivers
- Where/When if_ipackets is counted up
- Note that some drivers still update packet statistics in their own
way (periodical update)
- Moved bpf_mtap run in softint
- This makes it easy to MP-ify bpf

Proposed on tech-kern and tech-net
 1.93  10-Jun-2016  ozaki-r branches: 1.93.2;
Introduce m_set_rcvif and m_reset_rcvif

The API is used to set (or reset) a received interface of a mbuf.
They are counterpart of m_get_rcvif, which will come in another
commit, hide internal of rcvif operation, and reduce the diff of
the upcoming change.

No functional change.
 1.92  09-Feb-2016  ozaki-r Introduce softint-based if_input

This change intends to run the whole network stack in softint context
(or normal LWP), not hardware interrupt context. Note that the work is
still incomplete by this change; to that end, we also have to softint-ify
if_link_state_change (and bpf) which can still run in hardware interrupt.

This change softint-ifies at ifp->if_input that is called from
each device driver (and ieee80211_input) to ensure Layer 2 runs
in softint (e.g., ether_input and bridge_input). To this end,
we provide a framework (called percpuq) that utlizes softint(9)
and percpu ifqueues. With this patch, rxintr of most drivers just
queues received packets and schedules a softint, and the softint
dequeues packets and does rest packet processing.

To minimize changes to each driver, percpuq is allocated in struct
ifnet for now and that is initialized by default (in if_attach).
We probably have to move percpuq to softc of each driver, but it's
future work. At this point, only wm(4) has percpuq in its softc
as a reference implementation.

Additional information including performance numbers can be found
in the thread at tech-kern@ and tech-net@:
http://mail-index.netbsd.org/tech-kern/2016/01/14/msg019997.html

Acknowledgment: riastradh@ greatly helped this work.
Thank you very much!
 1.91  13-Apr-2015  riastradh Convert sys/dev to use <sys/rndsource.h>.
 1.90  10-Aug-2014  tls branches: 1.90.4;
Merge tls-earlyentropy branch into HEAD.
 1.89  27-Oct-2012  chs branches: 1.89.10;
split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.
 1.88  02-Feb-2012  tls branches: 1.88.6;
Entropy-pool implementation move and cleanup.

1) Move core entropy-pool code and source/sink/sample management code
to sys/kern from sys/dev.

2) Remove use of NRND as test for presence of entropy-pool code throughout
source tree.

3) Remove use of RND_ENABLED in device drivers as microoptimization to
avoid expensive operations on disabled entropy sources; make the
rnd_add calls do this directly so all callers benefit.

4) Fix bug in recent rnd_add_data()/rnd_add_uint32() changes that might
have lead to slight entropy overestimation for some sources.

5) Add new source types for environmental sensors, power sensors, VM
system events, and skew between clocks, with a sample implementation
for each.

ok releng to go in before the branch due to the difficulty of later
pullup (widespread #ifdef removal and moved files). Tested with release
builds on amd64 and evbarm and live testing on amd64.
 1.87  19-Nov-2011  tls branches: 1.87.2;
First step of random number subsystem rework described in
<20111022023242.BA26F14A158@mail.netbsd.org>. This change includes
the following:

An initial cleanup and minor reorganization of the entropy pool
code in sys/dev/rnd.c and sys/dev/rndpool.c. Several bugs are
fixed. Some effort is made to accumulate entropy more quickly at
boot time.

A generic interface, "rndsink", is added, for stream generators to
request that they be re-keyed with good quality entropy from the pool
as soon as it is available.

The arc4random()/arc4randbytes() implementation in libkern is
adjusted to use the rndsink interface for rekeying, which helps
address the problem of low-quality keys at boot time.

An implementation of the FIPS 140-2 statistical tests for random
number generator quality is provided (libkern/rngtest.c). This
is based on Greg Rose's implementation from Qualcomm.

A new random stream generator, nist_ctr_drbg, is provided. It is
based on an implementation of the NIST SP800-90 CTR_DRBG by
Henric Jungheim. This generator users AES in a modified counter
mode to generate a backtracking-resistant random stream.

An abstraction layer, "cprng", is provided for in-kernel consumers
of randomness. The arc4random/arc4randbytes API is deprecated for
in-kernel use. It is replaced by "cprng_strong". The current
cprng_fast implementation wraps the existing arc4random
implementation. The current cprng_strong implementation wraps the
new CTR_DRBG implementation. Both interfaces are rekeyed from
the entropy pool automatically at intervals justifiable from best
current cryptographic practice.

In some quick tests, cprng_fast() is about the same speed as
the old arc4randbytes(), and cprng_strong() is about 20% faster
than rnd_extract_data(). Performance is expected to improve.

The AES code in src/crypto/rijndael is no longer an optional
kernel component, as it is required by cprng_strong, which is
not an optional kernel component.

The entropy pool output is subjected to the rngtest tests at
startup time; if it fails, the system will reboot. There is
approximately a 3/10000 chance of a false positive from these
tests. Entropy pool _input_ from hardware random numbers is
subjected to the rngtest tests at attach time, as well as the
FIPS continuous-output test, to detect bad or stuck hardware
RNGs; if any are detected, they are detached, but the system
continues to run.

A problem with rndctl(8) is fixed -- datastructures with
pointers in arrays are no longer passed to userspace (this
was not a security problem, but rather a major issue for
compat32). A new kernel will require a new rndctl.

The sysctl kern.arandom() and kern.urandom() nodes are hooked
up to the new generators, but the /dev/*random pseudodevices
are not, yet.

Manual pages for the new kernel interfaces are forthcoming.
 1.86  05-Apr-2010  joerg branches: 1.86.8;
Push the bpf_ops usage back into bpf.h. Push the common ifp->if_bpf
check into the inline functions as well the fourth argument for
bpf_attach.
 1.85  19-Jan-2010  pooka branches: 1.85.2; 1.85.4;
Redefine bpf linkage through an always present op vector, i.e.
#if NBPFILTER is no longer required in the client. This change
doesn't yet add support for loading bpf as a module, since drivers
can register before bpf is attached. However, callers of bpf can
now be modularized.

Dynamically loadable bpf could probably be done fairly easily with
coordination from the stub driver and the real driver by registering
attachments in the stub before the real driver is loaded and doing
a handoff. ... and I'm not going to ponder the depths of unload
here.

Tested with i386/MONOLITHIC, modified MONOLITHIC without bpf and rump.
 1.84  12-May-2009  cegger struct device * -> device_t, no functional changes intended.
 1.83  12-May-2009  cegger struct cfdata * -> cfdata_t, no functional changes intended.
 1.82  14-Mar-2009  dsl Change about 4500 of the K&R function definitions to ANSI ones.
There are still about 1600 left, but they have ',' or /* ... */
in the actual variable definitions - which my awk script doesn't handle.
There are also many that need () -> (void).
(The script does handle misordered arguments.)
 1.81  07-Nov-2008  dyoung branches: 1.81.4;
*** Summary ***

When a link-layer address changes (e.g., ifconfig ex0 link
02:de: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.
 1.80  08-Apr-2008  cegger branches: 1.80.4; 1.80.10; 1.80.12;
use aprint_*_dev and device_xname
 1.79  19-Oct-2007  ad branches: 1.79.16;
machine/{bus,cpu,intr}.h -> sys/{bus,cpu,intr}.h
 1.78  26-Aug-2007  dyoung branches: 1.78.2; 1.78.6;
Constify: LLADDR -> CLLADDR. I'm aiming here to make it easier to
identify sockaddr_dl abuse that remains in the kernel, especially
the potential for overwriting memory past the end of a sockaddr_dl
with, e.g., memcpy(LLADDR(), ...).
 1.77  04-Mar-2007  christos branches: 1.77.2; 1.77.10; 1.77.14;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.
 1.76  16-Nov-2006  christos branches: 1.76.4;
__unused removal on arguments; approved by core.
 1.75  12-Oct-2006  christos - sprinkle __unused on function decls.
- fix a couple of unused bugs
- no more -Wno-unused for i386
 1.74  07-Sep-2006  dogcow branches: 1.74.2; 1.74.4;
remove more vestiges of CCITT, LLC, HDLC, NS, and NSIP.
 1.73  11-Dec-2005  christos branches: 1.73.4; 1.73.8;
merge ktrace-lwp.
 1.72  04-Feb-2005  perry branches: 1.72.6;
de-__P
 1.71  14-Sep-2004  drochner branches: 1.71.4; 1.71.6;
Separate the namespace for default (ie unspecified) locators used
by the isa.c bus driver and the "address/whatever not specified"
argument passed to leaf device drivers.
The former is "ISACF_XXX_DEFAULT" as generaterd by config(8), the latter
"ISA_UNKNOWN_XXX", defined in isavar.h.
This way we save a dependency of every ISA device driver on "locators.h".
 1.70  15-Jan-2003  bouyer branches: 1.70.2;
Zero out the NIC memory when padding packet to ETHER_MIN_LEN-ETHER_CRC_LEN
 1.69  02-Oct-2002  thorpej Fix sizeof and whitespace bug from the script I'm using to do the
CFATTACH_DECL conversion. (Grumble.)
 1.68  02-Oct-2002  thorpej Use CFATTACH_DECL().
 1.67  27-Sep-2002  thorpej Declare all cfattach structures const.
 1.66  07-Jan-2002  thorpej branches: 1.66.10;
Overhaul of the ISA autoconfiguration code to support direct
configuration of devices logically attached to the ISA bus:

* Change the isa_attach_args to have arrays of io, mem, irq, drq
resources.
* Add a "pnpnames" and a linked list of "pnpcompatnames" to the
isa_attach_args. If either of these members are non-NULL,
direct configuration of the bus is being performed. Add an
ISA_DIRECT_CONFIG() macro to test for this.
* Drivers are not allowed to modify the isa_attach_args unless
direct configuration is not being performed and the probe fucntion
is returning success.
* Adapt device drivers -- currently, all driver probe routines return
"no match" if ISA_DIRECT_CONFIG() evaluates to true.
 1.65  13-Nov-2001  lukem add RCSID
 1.64  18-Jul-2001  thorpej bcopy -> memcpy
 1.63  14-Dec-2000  thorpej branches: 1.63.2; 1.63.4;
ALTQ'ify.
 1.62  15-Nov-2000  thorpej Move bpfattach()/bpfdetach() calls into ether_ifattach()/ether_ifdetach().
 1.61  01-Oct-2000  thorpej Move the check for "promisc + unicast + not for us" into ether_input(),
and change Ethernet drivers to always pass all received frames to
ether_input() (with a few exceptions, which are documented in the
code).
 1.60  30-Mar-2000  augustss Remove register declarations.
 1.59  25-Aug-1999  thorpej branches: 1.59.2;
When padding short packets on transmit, don't include the CRC length
in the computation. kern/8194.
 1.58  18-May-1999  thorpej Rework layer 2 protocol input routines. Instead of calling e.g. ether_input()
directly, call the function pointer (*if_input)(ifp, m). The input routine
expects the packet header to be at the head of the packet, and will adjust
as necessary. Privatize the layer 2 input and output routines, allowing
*_ifattach() to set them up as appropriate.
 1.57  25-Mar-1999  thorpej branches: 1.57.4;
Use ETHER_*_LEN constants from <net/if_ether.h> instead of defining them
ourselves.
 1.56  28-Feb-1999  explorer Update to slightly altered rnd_attach_source() api
 1.55  12-Dec-1998  mycroft Simplify the copy loops a bit.
 1.54  05-Jul-1998  jonathan branches: 1.54.6;
defopt NS, NSIP.
 1.53  05-Jul-1998  jonathan defopt INET, NETATALK.
 1.52  09-Jun-1998  thorpej Nuke __BROKEN_INDIRECT_CONFIG.
 1.51  12-Jan-1998  thorpej Update for config changes.
 1.50  30-Nov-1997  drochner make it compile without "__BROKEN_INDIRECT_CONFIG"
 1.49  15-Oct-1997  explorer Add and/or update rnd_*() hooks
 1.48  10-Sep-1997  mycroft The 501 uses 16 ports, and has a wider range of possible I/O address.
 1.47  28-Apr-1997  mycroft branches: 1.47.4;
Oops; forgot to GC the last mbuf allocated when out of clusters.
 1.46  24-Apr-1997  mycroft Fix typo in previous.
 1.45  24-Apr-1997  mycroft If we fail to allocate a cluster to hold a large packet, simply
drop it rather than using a chain of tiny mbufs.
 1.44  15-Mar-1997  is New ARP system, supports IPv4 over any hardware link.

Some of the stuff (e.g., rarpd, bootpd, dhcpd etc., libsa) still will
only support Ethernet. Tcpdump itself should be ok, but libpcap needs
lot of work.

For the detailed change history, look at the commit log entries for
the is-newarp branch.
 1.43  21-Oct-1996  thorpej branches: 1.43.4;
New bus.h implementation/interface:
- No more distinction between i/o-mapped and memory-mapped
devices. It's all "bus space" now, and space tags
differentiate the space with finer grain than the
bus chipset tag.
- Add memory barrier methods.
- Implement space alloc/free methods.
- Implement region read/write methods (like memcpy to/from
bus space).
This interface provides a better abstraction for dealing with
machine-independent chipset drivers.
 1.42  13-Oct-1996  christos backout kprintf changes
 1.41  10-Oct-1996  christos - printf to kprintf, sprintf -> ksprintf
 1.40  03-Aug-1996  thorpej Two changes:

- Convert to use <machine/bus.h>.

- Also read station address in egattach(). The softc is no
longer required in the probe function.
 1.39  12-May-1996  mycroft Use intr.h.
 1.38  07-May-1996  thorpej Changed struct ifnet to have a pointer to the softc of the underlying
device and a printable "external name" (name + unit number), thus eliminating
if_name and if_unit. Updated interface to (*if_watchdog)() and (*if_reset)()
to take a struct ifnet *, rather than a unit number.
 1.37  29-Apr-1996  christos - prototype fixes
 1.36  11-Apr-1996  cgd update for addition of a machine-dependent cookie as the first argument
to isa_intr_{,dis}establish().
 1.35  17-Mar-1996  thorpej New device attachment scheme:

- split softc size and match/attach out from cfdriver into
a new struct cfattach.

- new "attach" directive for files.*. May specify the name of
the cfattach structure, so that devices may be easily attached
to parents with different autoconfiguration semantics.
 1.34  24-Dec-1995  mycroft The IST_* and IPL_* constants are not bus-specific; don't treat them as such.
Change splimp -> splnet in Ethernet, ARCnet, and FDDI drivers.
 1.33  05-Aug-1995  mycroft Count collisions and errors better.
 1.32  24-Jul-1995  mycroft Fix thinko in packet size diagnostic.
 1.31  24-Jul-1995  mycroft Fix typos.
 1.30  24-Jul-1995  mycroft Various cleanup:
* Use standard function naming conventions.
* Only increment if_ipackets when a packet was actually received.
* Check for excessively large or small packets before trying to read them.
 1.29  23-Jul-1995  mycroft Remove extra spls in el_init().
 1.28  23-Jul-1995  mycroft Update prototypes.
 1.27  23-Jul-1995  mycroft Various:
* Fix ugly looping constructs.
* Add a missing splx().
* Eliminate sc_pktbuf.
 1.26  23-Jul-1995  mycroft Recode elread() and elget() like other drivers.
 1.25  12-Jun-1995  mycroft Remove check for if_addrlist == 0; if_attach() always puts one address on
the list, so this is a noop.
 1.24  09-Jun-1995  mycroft Add missing `break;'s.
 1.23  17-Apr-1995  cgd clean up several ISA device interfaces: autoconfiguration, header
inclusion, and interrupt configuration. more work still needs to be done,
but it's getting better...
 1.22  11-Apr-1995  mycroft Sync with the rest of the world.
 1.21  29-Jan-1995  cgd lip service to making ISA support machine-independent. This is the first
round: moving the drivers into a machine-independent directory.
Some drivers (e.g. fd.c) not moved because they use other pc features (e.g.
CMOS settings), and none of the non-driver files moved, because they're
still pretty much PC specific. eventually (when other ports with ISA
busses really start using this code), more 'high-level' ISA support will
live here.
 1.20  03-Jan-1995  mycroft Add interrupt sharing types.
 1.19  10-Dec-1994  mycroft Fix format of attach message.
 1.18  18-Nov-1994  mycroft Convert port, IRQ, and DRQ numbers to ints.
 1.17  04-Nov-1994  mycroft No longer needs icu.h.
 1.16  03-Nov-1994  mycroft Update to match autoconfig code.
 1.15  30-Oct-1994  cgd be more careful with types, also pull in headers where necessary.
 1.14  27-Oct-1994  cgd new RCS ID format.
 1.13  13-May-1994  mycroft Use ether_ifattach() rather than doing the same thing in each driver.
 1.12  11-May-1994  mycroft Fill in some more struct ifnet fields.
 1.11  24-Apr-1994  mycroft Don't need isa.h.
 1.10  08-Apr-1994  mycroft Fix return values from some interrupt routines.
 1.9  07-Apr-1994  mycroft Implement dynamic IRQ configuration and IRQ sharing. Inline spl*() calls.
Reorganize and clean up the relevant code.
 1.8  29-Mar-1994  mycroft Updates for new autoconfig.
 1.7  08-Mar-1994  mycroft #include cpu.h in all files which use spl*().
 1.6  06-Mar-1994  mycroft DELAY() --> delay(). This is not a macro.
 1.5  03-Mar-1994  mycroft Upload the ether address to the card after a reset, per Matt Kimmel.
 1.4  02-Mar-1994  mycroft Increment outbound packet count, per Matt Kimmel.
 1.3  01-Mar-1994  mycroft Clean up a bit more; make it look like other drivers. Remove SIOCGIFADDR.
 1.2  01-Mar-1994  cgd format cop, plus fix up ether_type byte order difference.
things that i think look bogus are marked "XXX" with "cgd" in the
same line; some enet-savvy person should look through them.
 1.1  01-Mar-1994  hpeyerl Driver for 3Com Etherlink (3c501)
>From Matthew E. Kimmel (kimmel@cs.umass.edu)
 1.43.4.3  10-Mar-1997  is netinet/if_ether.h => netinet/if_inarp.h
 1.43.4.2  26-Feb-1997  is Fix edito pointed out by Charles Hannum.
 1.43.4.1  25-Feb-1997  is Convert to the new world order.
 1.47.4.1  16-Sep-1997  thorpej Update marc-pcmcia branch from trunk.
 1.54.6.1  11-Dec-1998  kenh The beginnings of interface detach support. Still some bugs, but mostly
works for me.

This work was originally by Bill Studenmund, and cleaned up by me.
 1.57.4.1  21-Jun-1999  thorpej Sync w/ -current.
 1.59.2.3  05-Jan-2001  bouyer Sync with HEAD
 1.59.2.2  22-Nov-2000  bouyer Sync with HEAD.
 1.59.2.1  20-Nov-2000  bouyer Update thorpej_scsipi to -current as of a month ago
A i386 GENERIC kernel compiles without the siop, ahc and bha drivers
(will be updated later). i386 IDE/ATAPI and ncr work, as well as
sparc/esp_sbus. alpha should work as well (untested yet).
siop, ahc and bha will be updated once I've updated the branch to current
-current, as well as machine-dependant code.
 1.63.4.3  10-Oct-2002  jdolecek sync kqueue with -current; this includes merge of gehenna-devsw branch,
merge of i386 MP branch, and part of autoconf rototil work
 1.63.4.2  10-Jan-2002  thorpej Sync kqueue branch with -current.
 1.63.4.1  03-Aug-2001  lukem update to -current
 1.63.2.6  17-Jan-2003  thorpej Sync with HEAD.
 1.63.2.5  18-Oct-2002  nathanw Catch up to -current.
 1.63.2.4  28-Feb-2002  nathanw Catch up to -current.
 1.63.2.3  11-Jan-2002  nathanw More catchup.
 1.63.2.2  14-Nov-2001  nathanw Catch up to -current.
 1.63.2.1  24-Aug-2001  nathanw Catch up with -current.
 1.66.10.1  27-Jan-2003  jmc Pullup revisions 1.69-1.70 (requested by bouyer in ticket #1090)
Zero out the NIC memory when padding packet to ETHER_MIN_LEN-ETHER_CRC_LEN.
 1.70.2.3  04-Feb-2005  skrll Sync with HEAD.
 1.70.2.2  21-Sep-2004  skrll Fix the sync with head I botched.
 1.70.2.1  18-Sep-2004  skrll Sync with HEAD.
 1.71.6.1  12-Feb-2005  yamt sync with head.
 1.71.4.1  29-Apr-2005  kent sync with -current
 1.72.6.3  27-Oct-2007  yamt sync with head.
 1.72.6.2  03-Sep-2007  yamt sync with head.
 1.72.6.1  30-Dec-2006  yamt sync with head.
 1.73.8.1  14-Sep-2006  yamt sync with head.
 1.73.4.1  09-Sep-2006  rpaulo sync with head
 1.74.4.2  10-Dec-2006  yamt sync with head.
 1.74.4.1  22-Oct-2006  yamt sync with head
 1.74.2.1  18-Nov-2006  ad Sync with head.
 1.76.4.1  12-Mar-2007  rmind Sync with HEAD.
 1.77.14.2  26-Oct-2007  joerg Sync with HEAD.

Follow the merge of pmap.c on i386 and amd64 and move
pmap_init_tmp_pgtbl into arch/x86/x86/pmap.c. Modify the ACPI wakeup
code to restore CR4 before jumping back into kernel space as the large
page option might cover that.
 1.77.14.1  03-Sep-2007  jmcneill Sync with HEAD.
 1.77.10.1  03-Sep-2007  skrll Sync with HEAD.
 1.77.2.2  23-Oct-2007  ad Sync with head.
 1.77.2.1  09-Oct-2007  ad Sync with head.
 1.78.6.1  25-Oct-2007  bouyer Sync with HEAD.
 1.78.2.1  06-Nov-2007  matt sync with HEAD
 1.79.16.2  17-Jan-2009  mjf Sync with HEAD.
 1.79.16.1  02-Jun-2008  mjf Sync with HEAD.
 1.80.12.2  28-Apr-2009  skrll Sync with HEAD.
 1.80.12.1  19-Jan-2009  skrll Sync with HEAD.
 1.80.10.1  13-Dec-2008  haad Update haad-dm branch to haad-dm-base2.
 1.80.4.4  11-Aug-2010  yamt sync with head.
 1.80.4.3  11-Mar-2010  yamt sync with head
 1.80.4.2  16-May-2009  yamt sync with head
 1.80.4.1  04-May-2009  yamt sync with head.
 1.81.4.1  13-May-2009  jym Sync with HEAD.

Commit is split, to avoid a "too many arguments" protocol error.
 1.85.4.1  30-May-2010  rmind sync with head
 1.85.2.1  30-Apr-2010  uebayasi Sync with HEAD.
 1.86.8.2  30-Oct-2012  yamt sync with head
 1.86.8.1  17-Apr-2012  yamt sync with head
 1.87.2.1  18-Feb-2012  mrg merge to -current.
 1.88.6.3  03-Dec-2017  jdolecek update from HEAD
 1.88.6.2  20-Aug-2014  tls Rebase to HEAD as of a few days ago.
 1.88.6.1  20-Nov-2012  tls Resync to 2012-11-19 00:00:00 UTC
 1.89.10.1  07-Apr-2014  tls Be a little more clear and consistent about harvesting entropy from devices:

1) deprecate RND_FLAG_NO_ESTIMATE

2) define RND_FLAG_COLLECT_TIME, RND_FLAG_COLLECT_VALUE

3) define RND_FLAG_ESTIMATE_TIME, RND_FLAG_ESTIMATE_VALUE

4) define RND_FLAG_DEFAULT: RND_FLAG_COLLECT_TIME|
RND_FLAG_COLLECT_VALUE|RND_FLAG_ESTIMATE_TIME

5) Make entropy harvesting from environmental sensors a little more generic
and remove it from individual sensor drivers.

6) Remove individual open-coded delta-estimators for values from a few
places in the tree (uvm, environmental drivers).

7) 0 -> RND_FLAG_DEFAULT, actually gather entropy from various drivers
that had stubbed out code, other minor cleanups.
 1.90.4.4  05-Feb-2017  skrll Sync with HEAD
 1.90.4.3  09-Jul-2016  skrll Sync with HEAD
 1.90.4.2  19-Mar-2016  skrll Sync with HEAD
 1.90.4.1  06-Jun-2015  skrll Sync with HEAD
 1.93.2.1  07-Jan-2017  pgoyette Sync with HEAD. (Note that most of these changes are simply $NetBSD$
tag issues.)
 1.94.14.3  06-Sep-2018  pgoyette Sync with HEAD

Resolve a couple of conflicts (result of the uimin/uimax changes)
 1.94.14.2  28-Jul-2018  pgoyette Sync with HEAD
 1.94.14.1  25-Jun-2018  pgoyette Sync with HEAD
 1.94.8.1  26-Jul-2018  snj Pull up following revision(s) (requested by msaitoh in ticket #938):
sys/arch/acorn32/podulebus/if_ie.c: revision 1.41
sys/arch/amiga/dev/if_es.c: revision 1.58
sys/arch/amiga/dev/if_qn.c: revision 1.45
sys/arch/arm/at91/at91emac.c: revision 1.20
sys/arch/arm/ep93xx/epe.c: revision 1.37
sys/arch/emips/ebus/if_le_ebus.c: revision 1.14
sys/arch/emips/ebus/if_le_ebus.c: revision 1.15
sys/arch/mac68k/dev/if_mc.c: revision 1.46
sys/arch/macppc/dev/am79c950.c: revision 1.39
sys/arch/newsmips/apbus/if_sn.c: revision 1.40
sys/arch/next68k/dev/mb8795.c: revision 1.59
sys/arch/playstation2/dev/if_smap.c: revision 1.25
sys/arch/playstation2/dev/if_smap.c: revision 1.26
sys/arch/sun2/dev/if_ec.c: revision 1.28
sys/arch/sun3/dev/if_ie.c: revision 1.63
sys/arch/x68k/dev/if_ne_intio.c: revision 1.19
sys/arch/xen/xen/if_xennet_xenbus.c: revision 1.75
sys/arch/xen/xen/xennetback_xenbus.c: revision 1.63
sys/dev/bi/if_ni.c: revision 1.45
sys/dev/cadence/if_cemac.c: revision 1.12
sys/dev/ic/am7990.c: revision 1.78
sys/dev/ic/am79900.c: revision 1.27
sys/dev/ic/an.c: revision 1.67
sys/dev/ic/cs89x0.c: revision 1.40
sys/dev/ic/dm9000.c: revision 1.13
sys/dev/ic/dm9000.c: revision 1.14
sys/dev/ic/dp8390.c: revision 1.88
sys/dev/ic/elink3.c: revision 1.141
sys/dev/ic/elinkxl.c: revision 1.122
sys/dev/ic/hme.c: revision 1.98
sys/dev/ic/i82586.c: revision 1.77
sys/dev/ic/lance.c: revision 1.53
sys/dev/ic/mb86950.c: revision 1.27
sys/dev/ic/mb86960.c: revision 1.86
sys/dev/ic/mtd803.c: revision 1.34
sys/dev/ic/pdq_ifsubr.c: revision 1.59
sys/dev/ic/rrunner.c: revision 1.86
sys/dev/ic/seeq8005.c: revision 1.58
sys/dev/ic/sgec.c: revision 1.47
sys/dev/ic/smc90cx6.c: revision 1.72
sys/dev/ic/smc91cxx.c: revision 1.96
sys/dev/ic/tropic.c: revision 1.49
sys/dev/ic/wi.c: revision 1.245
sys/dev/isa/if_eg.c: revision 1.93
sys/dev/isa/if_el.c: revision 1.95
sys/dev/isa/if_iy.c: revision 1.101
sys/dev/ofw/ofnet.c: revision 1.58
sys/dev/pci/if_alc.c: revision 1.27
sys/dev/pci/if_de.c: revision 1.152
sys/dev/pci/if_fpa.c: revision 1.61
sys/dev/pci/if_jme.c: revision 1.34
sys/dev/pci/if_tl.c: revision 1.108
sys/dev/pci/if_vte.c: revision 1.19
sys/dev/pci/ixgbe/ixgbe.h: revision 1.50
sys/dev/pcmcia/if_cnw.c: revision 1.62
sys/dev/pcmcia/if_malo_pcmcia.c: revision 1.17
sys/dev/pcmcia/if_ray.c: revision 1.89
sys/dev/pcmcia/if_xi.c: revision 1.81
sys/dev/pcmcia/mhzc.c: revision 1.51
sys/dev/pcmcia/xirc.c: revision 1.34
sys/dev/qbus/if_de.c: revision 1.33
sys/dev/qbus/if_qe.c: revision 1.78
sys/dev/qbus/if_qt.c: revision 1.22
sys/dev/sbus/be.c: revision 1.87
sys/dev/sbus/qe.c: revision 1.68
sys/dev/scsipi/if_se.c: revision 1.96
sys/dev/usb/if_atu.c: revision 1.59
sys/net/if_l2tp.c: revision 1.28 via patch
sys/net/if_ppp.c: revision 1.160
It's not required to include net/bpfdesc.h. Remove it.
--
Simplify like other drivers. NULL check of ifp->if_bpf is done in
bpf_mtap(), so it's not required to do it here.
--
Remove duplicated inclusion of net/bpf.h.
--
Remove duplicated inclusion of net/bpf.h.
--
Simplify bpf_mtap() call. No functional change.
 1.96.2.2  08-Apr-2020  martin Merge changes from current as of 20200406
 1.96.2.1  10-Jun-2019  christos Sync with HEAD
 1.98.6.1  29-Feb-2020  ad Sync with head.

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