Remove unnecessary <sys/malloc.h>.

Split device_t/softc.
Tested on TME emulating SS2.

XXX: bwtwo at obmem on TME emulating sun2 didn't match and cannot test

Remove clause 3 and 4 from TNF licenses

branches: 1.15.62; 1.15.64; 1.15.66;
Use device_cfdata().

branches: 1.14.4; 1.14.6; 1.14.8; 1.14.10; 1.14.12;
merge ktrace-lwp.

branches: 1.13.2;
Add const.

de-__P, remove register, ansify, b* -> mem*, u_int*_t -> uint*_t.

branches: 1.11.8;
NetBSD.ORG -> NetBSD.org

Now all "NetBSD.ORG" are gone from src/sys.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

__KERNEL_RCSID()

branches: 1.8.6;
Add trailing ; to CFATTACH_DECL.

Use CFATTACH_DECL().

Declare all cfattach structures const.

Merge the gehenna-devsw branch into the trunk.

This merge changes the device switch tables from static array to
dynamically generated by config(8).

- All device switches is defined as a constant structure in device drivers.

- The new grammer ``device-major'' is introduced to ``files''.

device-major <prefix> char <num> [block <num>] [<rules>]

- All device major numbers must be listed up in port dependent majors.<arch>
by using this grammer.

- Added the new naming convention.
The name of the device switch must be <prefix>_[bc]devsw for auto-generation
of device switch tables.

- The backward compatibility of loading block/character device
switch by LKM framework is broken. This is necessary to convert
from block/character device major to device name in runtime and vice versa.

- The restriction to assign device major by LKM is completely removed.
We don't need to reserve LKM entries for dynamic loading of device switch.

- In compile time, device major numbers list is packed into the kernel and
the LKM framework will refer it to assign device major number dynamically.

branches: 1.4.4;
sc_btype has been removed from struct bwtwo_softc.

branches: 1.3.2; 1.3.8;
Converted to use the new bus-specific attach args,
and the bus_space_peek_N functions.

branches: 1.2.2;
Use fb_setsize_eeprom to do some intialization of the
fb structure.

Added.

Remove clause 3 and 4 from TNF licenses

branches: 1.1.2; 1.1.10; 1.1.128; 1.1.130; 1.1.132;
Added.

Remove unused struct device menber from softc. from chs@

branches: 1.3.112; 1.3.122;
merge ktrace-lwp.

de-__P, remove register, ansify, b* -> mem*, u_int*_t -> uint*_t.

branches: 1.1.4; 1.1.10; 1.1.16; 1.1.24;
Added bits to complete the sun2 console code. These are
virtually identical copies of files under sys/arch/sparc/dev,
and one day they will be merged under sys/dev/sun.

branches: 1.9.20; 1.9.30;
Move cn_tab initialization from late cpu_startup(9) to
early _bootstrap() in locore2.c.
Tested on TME emulating 2/120.

move console initialization to cpu_startup() so that we avoid multiple common.

branches: 1.7.12;
Fix missing parenthesis in #ifdef notyet block. PR port-sun2/42524

branches: 1.6.78;
merge ktrace-lwp.

Add const.

de-__P, remove register, ansify, b* -> mem*, u_int*_t -> uint*_t.

branches: 1.3.8;
__KERNEL_RCSID()

branches: 1.2.6;
Merge the gehenna-devsw branch into the trunk.

This merge changes the device switch tables from static array to
dynamically generated by config(8).

- All device switches is defined as a constant structure in device drivers.

- The new grammer ``device-major'' is introduced to ``files''.

device-major <prefix> char <num> [block <num>] [<rules>]

- All device major numbers must be listed up in port dependent majors.<arch>
by using this grammer.

- Added the new naming convention.
The name of the device switch must be <prefix>_[bc]devsw for auto-generation
of device switch tables.

- The backward compatibility of loading block/character device
switch by LKM framework is broken. This is necessary to convert
from block/character device major to device name in runtime and vice versa.

- The restriction to assign device major by LKM is completely removed.
We don't need to reserve LKM entries for dynamic loading of device switch.

- In compile time, device major numbers list is packed into the kernel and
the LKM framework will refer it to assign device major number dynamically.

branches: 1.1.4; 1.1.6; 1.1.10;
Added bits to complete the sun2 console code. These are
virtually identical copies of files under sys/arch/sparc/dev,
and one day they will be merged under sys/dev/sun.

sys: Drop redundant NULL check before m_freem(9)

m_freem(9) safely has accepted NULL argument at least since 4.2BSD:
https://www.tuhs.org/cgi-bin/utree.pl?file=4.2BSD/usr/src/sys/sys/uipc_mbuf.c

Compile-tested on amd64/ALL.

Suggested by knakahara@

branches: 1.36.28;
Replace manipulating IFF_OACTIVE with an internal "txbusy" field.

Adopt <net/if_stats.h>.

branches: 1.34.4;
Even if we don't use MII(4), use the common path of SIOC[GS]IFMEDIA in
sys/net/if_ethersubr.c if we can.
- Add ec_ifmedia into struct ethercom.
- ec_mii in struct ethercom is kept and used as it is. It might be used in
future. Note that some Ethernet drivers which _DOESN'T_ use mii(4) use
ec_mii for keeping the if_media. Those should be changed in future.

KNF. No functional change.

Whitespace fix. No functional change.

Remove very old IFF_NOTRAILERS flag.

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!)

branches: 1.29.2;
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.

It's not required to include net/bpfdesc.h. Remove it.

branches: 1.27.8; 1.27.14;
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

Apply deferred if_start framework

if_schedule_deferred_start checks if the if_snd queue contains packets,
so drivers don't need to check it by themselves.

branches: 1.25.2;
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.

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!

Remove leftover use of AF_NS and NS option

Unnecessary NETISR_NS is also removed.

MD rnd.h cleanups. Please let me know if I broke anything!

branches: 1.21.4;
Merge tls-earlyentropy branch into HEAD.

branches: 1.20.6; 1.20.20;
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.

branches: 1.19.2;
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.

branches: 1.18.8;
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.

branches: 1.17.2; 1.17.4;
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.

*** 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.

branches: 1.15.2; 1.15.4;
Split device_t/softc with misc cosmetic changes.

branches: 1.14.2; 1.14.4;
Remove clause 3 and 4 from TNF licenses

branches: 1.13.6; 1.13.8; 1.13.10;
const char casting, to make gcc happy. (not that sun2 compiles these days
without other patches.)

branches: 1.12.20; 1.12.26; 1.12.32;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.11.26;
merge ktrace-lwp.

branches: 1.10.8;
de-__P, remove register, ansify, b* -> mem*, u_int*_t -> uint*_t.

branches: 1.9.8;
This driver was broken by bouyer on 2003/01/20.
I've made it at least config up/down again -- haven't tried actually passing
traffic.

__KERNEL_RCSID()

branches: 1.7.2;
bzero the part of the buffer used to pad the packet to
ETHER_MIN_LEN - ETHER_CRC_LEN.

Add trailing ; to CFATTACH_DECL.

Use CFATTACH_DECL().

Declare all cfattach structures const.

branches: 1.3.10;
Added ifmedia(4) support.

branches: 1.2.6;
Sometimes the ec board reports a packet length that's too large.
Try to deal with this by clipping the packet length, and, under
DEBUG, printf when we do. Also zero out the packet status in
the buffer before we give it back to the board.

branches: 1.1.2;
Added an attachment for Intel ethernet (ie) at obio.
Added support for the 3Com Ethernet (ec) at mbmem.

Remove clause 3 and 4 from TNF licenses

branches: 1.5.74; 1.5.76; 1.5.78;
merge ktrace-lwp.

de-__P, remove register, ansify, b* -> mem*, u_int*_t -> uint*_t.

branches: 1.3.6; 1.3.22; 1.3.30;
Sometimes the ec board reports a packet length that's too large.
Try to deal with this by clipping the packet length, and, under
DEBUG, printf when we do. Also zero out the packet status in
the buffer before we give it back to the board.

Fixed a bug where we were using ETHERMIN and ETHERMTU
where we really wanted ETHER_MIN_LEN and ETHER_MAX_LEN.

branches: 1.1.2;
Added an attachment for Intel ethernet (ie) at obio.
Added support for the 3Com Ethernet (ec) at mbmem.

fix various typos in comments, mainly copypasta.

No functional change:
- Use __arraycount().
- u_int_{8,16,32}_t -> uint_{8,16,32}_t
- KNF.
- Tabify.
- Remove extra space.

branches: 1.11.54;
Split device_t/softc of i82586. No crash on TME emulating sun2.

branches: 1.10.2;
udpate license clauses on my code to match the new-style BSD licenses.
remove no-longer-valid wustl email address for me.
based on diff that rmind@ sent me.

no functional change with this commit.

branches: 1.9.100; 1.9.106; 1.9.108;
merge ktrace-lwp.

de-__P, remove register, ansify, b* -> mem*, u_int*_t -> uint*_t.

branches: 1.7.8;
__KERNEL_RCSID()

branches: 1.6.6;
Add trailing ; to CFATTACH_DECL.

Use CFATTACH_DECL().

Declare all cfattach structures const.

branches: 1.3.2; 1.3.8;
Converted to use the new bus-specific attach args,
and the bus_space_peek_N functions. Also uses the
sun68k-specific bus_space_copy{in,out} functions.

branches: 1.2.2;
Fixed a bug where we were trying to map the board RAM
using the physical address of the board registers.

Added.

Remove unnecessary <sys/malloc.h>.

fix various typos in comments, mainly copypasta.

No functional change:
- Use __arraycount().
- u_int_{8,16,32}_t -> uint_{8,16,32}_t
- KNF.
- Tabify.
- Remove extra space.

branches: 1.16.30;
- remove unused
- use cpu_{g,s}etmodel

branches: 1.15.2; 1.15.12; 1.15.16;
Split device_t/softc of i82586. No crash on TME emulating sun2.

branches: 1.14.2;
udpate license clauses on my code to match the new-style BSD licenses.
remove no-longer-valid wustl email address for me.
based on diff that rmind@ sent me.

no functional change with this commit.

branches: 1.13.22; 1.13.28; 1.13.30;
Remove clause 3 and 4 from TNF licenses

branches: 1.12.40; 1.12.42; 1.12.44;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

TRUE -> true, FALSE -> false

branches: 1.10.26;
merge ktrace-lwp.

branches: 1.9.2;
Fix shadowing variable warning.

de-__P, remove register, ansify, b* -> mem*, u_int*_t -> uint*_t.

branches: 1.7.8;
__KERNEL_RCSID()

branches: 1.6.2;
Use PAGE_SIZE rather than NBPG.

Add trailing ; to CFATTACH_DECL.

Use CFATTACH_DECL().

Declare all cfattach structures const.

branches: 1.2.4;
Changed an obio to read Multibus.

branches: 1.1.2; 1.1.4;
Added an attachment for Intel ethernet (ie) at obio.
Added support for the 3Com Ethernet (ec) at mbmem.

Add d_discard to all struct cdevsw instances I could find.

All have been set to "nodiscard"; some should get a real implementation.

branches: 1.24.2;
Change (mostly mechanically) every cdevsw/bdevsw I can find to use
designated initializers.

I have not built every extant kernel so I have probably broken at
least one build; however I've also found and fixed some wrong
cdevsw/bdevsw entries so even if so I think we come out ahead.

branches: 1.23.2;
split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.

branches: 1.22.4; 1.22.14;
Rename ttymalloc() to tty_alloc(), and ttyfree() to tty_free() for
consistency. Remove some unnecessary malloc.h inclusions as well.

branches: 1.21.22; 1.21.28;
Remove clause 3 and 4 from TNF licenses

branches: 1.20.2; 1.20.4;
Split softc and device_t for zsc(4) and its children.

XXX we should restructure MI APIs and make it really machine independent.

branches: 1.19.14;
- Factor out too many copies of the same bit of tty code.
- Fix another tty signalling/wakeup problem.

branches: 1.18.2;
Move declaration of kd_later() up before the first use.

Initialise the callbacks for tty.t_rstrt_ch in ttymalloc
as all drivers but Sun/SPARC's kd.c use the same arguments.
Separate callout_reset into callout_schedule and the initial
callout_setfunc using that.

branches: 1.16.2; 1.16.18; 1.16.20; 1.16.24;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.15.2;
More spllowersoftclock() fallout.

Adapt MD code to KAUTH_DEVICE_TTY_OPEN. Patch from Matt Fleming, thanks!

branches: 1.13.4; 1.13.6;
Use the LWP cached credentials where sane.

integrate kauth.

branches: 1.11.4; 1.11.6; 1.11.8; 1.11.10; 1.11.12;
merge ktrace-lwp.

Change the driver open function's conditional for overriding exclusive tty
use from checking the proc's uid to suser(9), and account for the use of
privileges. Noted by David Holland in PR kern/31126.

branches: 1.9.8;
de-__P, remove register, ansify, b* -> mem*, u_int*_t -> uint*_t.

branches: 1.8.8;
Undo previous as it broke things.

There are some scattered implicit RASTERCONSOLE dependencies,
so there should be a better way.

#include "opt_rcons.h"

__KERNEL_RCSID()

branches: 1.5.6;
g/c cons_ocount, it's not used by anything

merge kqueue branch into -current

kqueue provides a stateful and efficient event notification framework
currently supported events include socket, file, directory, fifo,
pipe, tty and device changes, and monitoring of processes and signals

kqueue is supported by all writable filesystems in NetBSD tree
(with exception of Coda) and all device drivers supporting poll(2)

based on work done by Jonathan Lemon for FreeBSD
initial NetBSD port done by Luke Mewburn and Jason Thorpe

Pass a struct cons_channel * to cc_iclose, not a struct kbd_softc *.
This argument has been previously unused, thus undetected due to void*
typing. Mmm, copy & paste. Note that sparc got it right though.

Many thanks to Valeriy E. Ushakov <uwe@netbsd.org> for debugging support.

Merge the gehenna-devsw branch into the trunk.

This merge changes the device switch tables from static array to
dynamically generated by config(8).

- All device switches is defined as a constant structure in device drivers.

- The new grammer ``device-major'' is introduced to ``files''.

device-major <prefix> char <num> [block <num>] [<rules>]

- All device major numbers must be listed up in port dependent majors.<arch>
by using this grammer.

- Added the new naming convention.
The name of the device switch must be <prefix>_[bc]devsw for auto-generation
of device switch tables.

- The backward compatibility of loading block/character device
switch by LKM framework is broken. This is necessary to convert
from block/character device major to device name in runtime and vice versa.

- The restriction to assign device major by LKM is completely removed.
We don't need to reserve LKM entries for dynamic loading of device switch.

- In compile time, device major numbers list is packed into the kernel and
the LKM framework will refer it to assign device major number dynamically.

branches: 1.1.4; 1.1.6; 1.1.10;
Added bits to complete the sun2 console code. These are
virtually identical copies of files under sys/arch/sparc/dev,
and one day they will be merged under sys/dev/sun.

Add d_discard to all struct cdevsw instances I could find.

All have been set to "nodiscard"; some should get a real implementation.

branches: 1.21.2;
Change (mostly mechanically) every cdevsw/bdevsw I can find to use
designated initializers.

I have not built every extant kernel so I have probably broken at
least one build; however I've also found and fixed some wrong
cdevsw/bdevsw entries so even if so I think we come out ahead.

branches: 1.20.4; 1.20.14; 1.20.18;
Rename ttymalloc() to tty_alloc(), and ttyfree() to tty_free() for
consistency. Remove some unnecessary malloc.h inclusions as well.

branches: 1.19.18; 1.19.24;
Split device_t/softc with misc cosmetic changes.

use device_lookup_private to get softc

branches: 1.17.14; 1.17.16; 1.17.18; 1.17.20; 1.17.22;
- Factor out too many copies of the same bit of tty code.
- Fix another tty signalling/wakeup problem.

branches: 1.16.2;
Initialise the callbacks for tty.t_rstrt_ch in ttymalloc
as all drivers but Sun/SPARC's kd.c use the same arguments.
Separate callout_reset into callout_schedule and the initial
callout_setfunc using that.

Merge the ppcoea-renovation branch to HEAD.

This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree. Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches. The work
for this branch was done by a variety of people, too long to list here.

TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.

NOTES:
pmppc was removed as an arch, and moved to a evbppc target.

branches: 1.14.8; 1.14.10; 1.14.14;
Merge some of the less invasive changes from the vmlocking branch:

- kthread, callout, devsw API changes
- select()/poll() improvements
- miscellaneous MT safety improvements

branches: 1.13.2; 1.13.4; 1.13.10;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.12.4;
Adapt MD code to KAUTH_DEVICE_TTY_OPEN. Patch from Matt Fleming, thanks!

branches: 1.11.4; 1.11.6;
Use the LWP cached credentials where sane.

integrate kauth.

branches: 1.9.4; 1.9.6; 1.9.8; 1.9.10; 1.9.12;
merge ktrace-lwp.

branches: 1.8.8;
de-__P, remove register, ansify, b* -> mem*, u_int*_t -> uint*_t.

branches: 1.7.8;
__KERNEL_RCSID()

branches: 1.6.6;
merge kqueue branch into -current

kqueue provides a stateful and efficient event notification framework
currently supported events include socket, file, directory, fifo,
pipe, tty and device changes, and monitoring of processes and signals

kqueue is supported by all writable filesystems in NetBSD tree
(with exception of Coda) and all device drivers supporting poll(2)

based on work done by Jonathan Lemon for FreeBSD
initial NetBSD port done by Luke Mewburn and Jason Thorpe

Add trailing ; to CFATTACH_DECL.

Use CFATTACH_DECL().

Declare all cfattach structures const.

Merge the gehenna-devsw branch into the trunk.

This merge changes the device switch tables from static array to
dynamically generated by config(8).

- All device switches is defined as a constant structure in device drivers.

- The new grammer ``device-major'' is introduced to ``files''.

device-major <prefix> char <num> [block <num>] [<rules>]

- All device major numbers must be listed up in port dependent majors.<arch>
by using this grammer.

- Added the new naming convention.
The name of the device switch must be <prefix>_[bc]devsw for auto-generation
of device switch tables.

- The backward compatibility of loading block/character device
switch by LKM framework is broken. This is necessary to convert
from block/character device major to device name in runtime and vice versa.

- The restriction to assign device major by LKM is completely removed.
We don't need to reserve LKM entries for dynamic loading of device switch.

- In compile time, device major numbers list is packed into the kernel and
the LKM framework will refer it to assign device major number dynamically.

branches: 1.1.4; 1.1.6; 1.1.10;
Added bits to complete the sun2 console code. These are
virtually identical copies of files under sys/arch/sparc/dev,
and one day they will be merged under sys/dev/sun.

sun2/sc(4): Fix panic due to wrong ENOMEM for DMA buffer

Use kmem_zalloc(9) for sc->sc_dma_handles[] to zero-initialize flags.

XXX
Will soon apply to sun3.

malloc(9) -> kmem(9)

branches: 1.14.76;
Use lwp_getpcb() on sparc{64} and sun2/3 MD code, clean from struct user usage.

Split device_t/softc with misc cosmetic changes.

branches: 1.12.2; 1.12.4;
Remove clause 3 and 4 from TNF licenses

branches: 1.11.62; 1.11.64; 1.11.66;
Use device_cfdata().

branches: 1.10.4; 1.10.6; 1.10.8; 1.10.10; 1.10.12;
merge ktrace-lwp.

branches: 1.9.8;
de-__P, remove register, ansify, b* -> mem*, u_int*_t -> uint*_t.

branches: 1.8.8;
__KERNEL_RCSID()

branches: 1.7.2;
DMA, not dma nor Dma.

Add trailing ; to CFATTACH_DECL.

Use CFATTACH_DECL().

Declare all cfattach structures const.

remove trailing \n in panic(). approved perry.

branches: 1.2.2; 1.2.8;
Converted to use the new bus-specific attach args,
and the bus_space_peek_N functions. Now use hand-defined
macros instead of relying on structure layout to find registers.
Allocate the DMA handles here, since the MI chipset code
doesn't do that any more.

branches: 1.1.2;
Added support for the Sun SC scsi controller.

This file has been moved to sys/dev/vme.

branches: 1.1.2;
Added support for the Sun SC scsi controller.

remove TTY_DEBUG code from sun2/sparc64 zs.c code. it doesn't look relevant
to this particular drivers and likely is a leftover from some historical code.

ddb/db_active.h: New home for extern db_active.

This can be included unconditionally, and db_active can then be
queried unconditionally; if DDB is not in the kernel, then db_active
is a constant zero. Reduces need for #include opt_ddb.h, #ifdef DDB.

Add missing double p and d for stopped and overriden accordingly.
Fix few more typos along the way, mainly in copy-pasted comments.

Merge thorpej-cfargs2.

branches: 1.22.8;
Merge thorpej-cfargs branch:

Simplify and make extensible the config_search() / config_found() /
config_attach() interfaces: rather than having different variants for
which arguments you want pass along, just have a single call that
takes a variadic list of tag-value arguments.

Adjust all call sites:
- Simplify wherever possible; don't pass along arguments that aren't
actually needed.
- Don't be explicit about what interface attribute is attaching if
the device only has one. (More simplification.)
- Add a config_probe() function to be used in indirect configuiration
situations, making is visibly easier to see when indirect config is
in play, and allowing for future change in semantics. (As of now,
this is just a wrapper around config_match(), but that is an
implementation detail.)

Remove unnecessary or redundant interface attributes where they're not
needed.

There are currently 5 "cfargs" defined:
- CFARG_SUBMATCH (submatch function for direct config)
- CFARG_SEARCH (search function for indirect config)
- CFARG_IATTR (interface attribte)
- CFARG_LOCATORS (locators array)
- CFARG_DEVHANDLE (devhandle_t - wraps OFW, ACPI, etc. handles)

...and a sentinel value CFARG_EOL.

Add some extra sanity checking to ensure that interface attributes
aren't ambiguous.

Use CFARG_DEVHANDLE in MI FDT, OFW, and ACPI code, and macppc and shark
ports to associate those device handles with device_t instance. This
will trickle trough to more places over time (need back-end for pre-OFW
Sun OBP; any others?).

branches: 1.21.52;
struct device * -> device_t, struct cfdata * -> cfdata_t (from chs@)

branches: 1.20.2; 1.20.12;
catch up with other zs ports, original commit was:

>add two new functions for z8530tty: zs_chan_lock() and zs_chan_unlock(),
>and use them instead of various spl's in the zs.c's.
>
>reviewed by ad and martin.

use device_lookup_private to get softc

branches: 1.18.2; 1.18.4;
Remove clause 3 and 4 from TNF licenses

branches: 1.17.2; 1.17.4;
Split softc and device_t for zsc(4) and its children.

XXX we should restructure MI APIs and make it really machine independent.

branches: 1.16.12;
Adapt sun68k ports to recent interrupt handling changes.

XXX: sun2 (m68010) doesn't have CAS instructions.

branches: 1.15.2;
Call zs_lock_init() to set up the chanstate's lock.

branches: 1.14.16; 1.14.18; 1.14.22; 1.14.24;
Print correct softipl number.

branches: 1.13.4; 1.13.8;
Remove incorrect comment.

branches: 1.12.8; 1.12.10;
Use device_is_a().

branches: 1.11.4; 1.11.6; 1.11.8; 1.11.10; 1.11.12;
merge ktrace-lwp.

branches: 1.10.8;
de-__P, remove register, ansify, b* -> mem*, u_int*_t -> uint*_t.

branches: 1.9.8;
Uppercase CPU, plural is CPUs.

__KERNEL_RCSID()

branches: 1.7.2;
Provide locking required by the interrupt handlers running at IPL_SERIAL.

Use aprint_normal() for cfprint routines.

bcopy -> memcpy, bzero -> memset

remove trailing \n in panic(). approved perry.

Rather than referencing the cfdriver directly in the cfdata entries,
instead use a string naming the driver. The cfdriver is then looked
up in a list which is built at run-time.

Merge the gehenna-devsw branch into the trunk.

This merge changes the device switch tables from static array to
dynamically generated by config(8).

- All device switches is defined as a constant structure in device drivers.

- The new grammer ``device-major'' is introduced to ``files''.

device-major <prefix> char <num> [block <num>] [<rules>]

- All device major numbers must be listed up in port dependent majors.<arch>
by using this grammer.

- Added the new naming convention.
The name of the device switch must be <prefix>_[bc]devsw for auto-generation
of device switch tables.

- The backward compatibility of loading block/character device
switch by LKM framework is broken. This is necessary to convert
from block/character device major to device name in runtime and vice versa.

- The restriction to assign device major by LKM is completely removed.
We don't need to reserve LKM entries for dynamic loading of device switch.

- In compile time, device major numbers list is packed into the kernel and
the LKM framework will refer it to assign device major number dynamically.

branches: 1.1.4; 1.1.6; 1.1.10;
Added support for the sun2 zs serial ports. As this driver
is very common on Suns, it could be made shared under sys/dev/sun.

Remove clause 3 and 4 from TNF licenses

branches: 1.17.2; 1.17.4;
Split softc and device_t for zsc(4) and its children.

XXX we should restructure MI APIs and make it really machine independent.

branches: 1.16.52;
- change find_prom_map() to take paddr_t and return vaddr_t rather than
bus_space_handle_t since bus space handle without bus space tag looks weird
- replace old sun3 obio_find_mapping() with new common find_prom_map()
- add bus_space_vaddr(), from hp300

First attempt at bus_space(9) support for sun3 with common sun68k/bus.c:
- make sun3 port use common sun68k files as much as possible
- add temporary options _SUN2_ in std.sun2 until sun3 can share all
sun68k files (autoconf.c and isr.c are not yet)
- move sun68kvme declaration temporary as well from files.sun68k to files.sun2
- rename and move sun68k_find_prom_map() function to MD sources since it
can't be shared with sun3
- add bus tag members to struct confargs and initilize them where appropriate

XXX1: MD bus_dma(9) backends are not implemented (yet).
XXX2: more code (obio etc.) should be shared among sun3, sun3x and sun2.

branches: 1.14.8; 1.14.10;
Use device_unit().

branches: 1.13.4; 1.13.6; 1.13.8; 1.13.10; 1.13.12;
merge ktrace-lwp.

branches: 1.12.2;
Move common Sun ID PROM definitions into <dev/sun/idprom.h>.

de-__P, remove register, ansify, b* -> mem*, u_int*_t -> uint*_t.

branches: 1.10.8;
__KERNEL_RCSID()

branches: 1.9.6;
Add trailing ; to CFATTACH_DECL.

Use CFATTACH_DECL().

Declare all cfattach structures const.

Fixed kgdb support by including <sun2/dev/cons.h>.

branches: 1.5.8;
Only declare the console keyboard on zs if it's a Sun-2
or later keyboard.

branches: 1.4.2; 1.4.8;
Converted to use the new bus-specific attach args.
Added the zs_console_flags function, used to tell
MI code what zs is tied up in the console.

Now use the bus_space_peek_N function to probe for
the device, and common sun68k_find_prom_map function to
find a PROM mapping for a device.

add missing #include "opt_kgdb.h"

branches: 1.1.2;
Added.

apply similar changes between different archs/machines for zs_kgdb.c:
1) adjust zs_kgdb_init tty attachment message for kgdb_dev type change.
(one arch uses cast to int instead, but kept one approach for consistency)
2) remove unused rr0 declaration and assignment in zs_kgdb_txint()
3) adjust kgdb_dev format specifier to %llx/d if needed.
4) add const for zs_kgdb_devname declaration (macppc only).
should fix zs_kgdb.c build for all these ports.

branches: 1.10.68; 1.10.78;
Remove clause 3 and 4 from TNF licenses

branches: 1.9.16; 1.9.18; 1.9.20;
Merge the ppcoea-renovation branch to HEAD.

This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree. Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches. The work
for this branch was done by a variety of people, too long to list here.

TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.

NOTES:
pmppc was removed as an arch, and moved to a evbppc target.

branches: 1.8.10;
Fix a warning from gcc 4 about stripping the volatile qualifier by a cast
by doing the proper __UNVOLATILE() dance.

branches: 1.7.2; 1.7.4; 1.7.10;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.6.26;
merge ktrace-lwp.

branches: 1.5.8;
de-__P, remove register, ansify, b* -> mem*, u_int*_t -> uint*_t.

branches: 1.4.8;
__KERNEL_RCSID()

branches: 1.3.6;
bcopy -> memcpy, bzero -> memset

Merge the gehenna-devsw branch into the trunk.

This merge changes the device switch tables from static array to
dynamically generated by config(8).

- All device switches is defined as a constant structure in device drivers.

- The new grammer ``device-major'' is introduced to ``files''.

device-major <prefix> char <num> [block <num>] [<rules>]

- All device major numbers must be listed up in port dependent majors.<arch>
by using this grammer.

- Added the new naming convention.
The name of the device switch must be <prefix>_[bc]devsw for auto-generation
of device switch tables.

- The backward compatibility of loading block/character device
switch by LKM framework is broken. This is necessary to convert
from block/character device major to device name in runtime and vice versa.

- The restriction to assign device major by LKM is completely removed.
We don't need to reserve LKM entries for dynamic loading of device switch.

- In compile time, device major numbers list is packed into the kernel and
the LKM framework will refer it to assign device major number dynamically.

branches: 1.1.4; 1.1.6; 1.1.10;
Added support for the sun2 zs serial ports. As this driver
is very common on Suns, it could be made shared under sys/dev/sun.

Remove clause 3 and 4 from TNF licenses

branches: 1.1.4; 1.1.10; 1.1.118; 1.1.120; 1.1.122;
Added support for the sun2 zs serial ports. As this driver
is very common on Suns, it could be made shared under sys/dev/sun.

Fix build without kbd at zstty, simplify.

branches: 1.8.18;
KNF. Remove extra spaces. No functional change.

branches: 1.7.48; 1.7.68;
Split softc and device_t for zsc(4) and its children.

XXX we should restructure MI APIs and make it really machine independent.

branches: 1.6.38;
Fix a comment.

branches: 1.5.26; 1.5.30;
merge ktrace-lwp.

branches: 1.4.8;
de-__P, remove register, ansify, b* -> mem*, u_int*_t -> uint*_t.

branches: 1.3.8;
Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

branches: 1.2.2;
DMA, not dma nor Dma.

branches: 1.1.4; 1.1.10;
Added support for the sun2 zs serial ports. As this driver
is very common on Suns, it could be made shared under sys/dev/sun.