MFC r314568 (by emaste):

kern_sig.c: ANSIfy and remove archaic register keyword

Sponsored by: The FreeBSD Foundation

MFC r318389 (by emaste):

Remove register keyword from sys/ and ANSIfy prototypes

A long long time ago the register keyword told the compiler to store
the corresponding variable in a CPU register, but it is not relevant
for any compiler used in the FreeBSD world today.

ANSIfy related prototypes while here.

Reviewed by: cem, jhb
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D10193

MFC r312544

Fix reference to free memory in ixgbe/if_media.c

When ixgbe receives an interrupt indicating that a new optical module
may have been inserted, it discards all of its current media types
by calling ifmedia_removeall() and then creates a new set of media
types for the supported media on the new module. However,
ifmedia_removeall() was maintaining a pointer to whatever the
current media type was before the call to ifmedia_removealL().
The result of this was that any attempt to read the current media
type of the interface (e.g. via ifconfig) would return potentially
garbage data from free memory (or if one were particularly unlucky
on an architecture that does not malloc() from a direct map, page
fault the kernel).

Fix this by NULL'ing out the current media field in if_media.c,
and have ixgbe update the current media type after recreating
them.

Submitted by: Matt Joras <matt.joras AT gmail DOT com>
Reviewed by: sbruno, erj
MFC after: 1 week
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D9164

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

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

Make IFMEDIA_DEBUG a kernel option.

Sponsored by: Nginx, Inc.

ifmedia changes:

- Extend the number of available subtypes for Ethernet media by using some
of the ifmedia word's option bits to help denote subtypes. As a result, the
number of possible Ethernet subtype values increases from 31 to 511.

- Use some of those new values to define new media types.

- lacp_compose_key() recgonizes the new Ethernet media types added.
(Change made as required by a comment in if_media.h)

- New ioctl, SIOGIFXMEDIA, to handle getting the new extended media types.
SIOCGIFMEDIA is retained for backwards compatibility.

- Changes to ifconfig to allow it to handle the new extended media types.

Submitted by: mike@karels.net (original), hselasky
Reviewed by: jfvogel, gnn, hselasky
Approved by: jfvogel (mentor), gnn (mentor)
Differential Revision: http://reviews.freebsd.org/D1965

Optimize SIOCGIFMEDIA handling removing malloc(9) and double
traversal of the list.

Sponsored by: Nginx, Inc.
Sponsored by: Netflix

Fix typos - remove duplicate "the".

PR: bin/154928
Submitted by: Eitan Adler <lists at eitanadler.com>
MFC after: 3 days

- Introduce ifmedia_baudrate(), which returns correct baudrate of the
given media status. [1]
- Utilize ifmedia_baudrate() in miibus_statchg() to update ifp->if_baudrate.

Obtained from: NetBSD [1]

add a sysctl to turn debug msgs on/off when built with IFMEDIA_DEBUG

/* -> /*- for license, minor formatting changes

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)

Add media types and options for ATM. While on most ATM cards media cannot
be changed, it is very convenient to be able to toggle SDH/Sonet,
idle/unassigned cells and scrambled mode and to see the carrier
state.

Reviewed by: -arch (if_media.h definitions)

o add support for multi-mode devices like 802.11 wireless cards that support
11a/b/g by adding an optional 3-bit mode field
o correct the spelling of OFDM (was ODFM)
o add an 802.11 subtype option for turbo mode: the phy is clocked at 2x the
normal clock rate; note this can be applied to both OFDM in 11a and OFDM
in 11g mode (and possibly DS11 in 11b for certain phy's)
o add 802.11 CCK aliases for 11b/11g rates--the more common terminology

At long last, commit the zero copy sockets code.

MAKEDEV: Add MAKEDEV glue for the ti(4) device nodes.

ti.4: Update the ti(4) man page to include information on the
TI_JUMBO_HDRSPLIT and TI_PRIVATE_JUMBOS kernel options,
and also include information about the new character
device interface and the associated ioctls.

man9/Makefile: Add jumbo.9 and zero_copy.9 man pages and associated
links.

jumbo.9: New man page describing the jumbo buffer allocator
interface and operation.

zero_copy.9: New man page describing the general characteristics of
the zero copy send and receive code, and what an
application author should do to take advantage of the
zero copy functionality.

NOTES: Add entries for ZERO_COPY_SOCKETS, TI_PRIVATE_JUMBOS,
TI_JUMBO_HDRSPLIT, MSIZE, and MCLSHIFT.

conf/files: Add uipc_jumbo.c and uipc_cow.c.

conf/options: Add the 5 options mentioned above.

kern_subr.c: Receive side zero copy implementation. This takes
"disposable" pages attached to an mbuf, gives them to
a user process, and then recycles the user's page.
This is only active when ZERO_COPY_SOCKETS is turned on
and the kern.ipc.zero_copy.receive sysctl variable is
set to 1.

uipc_cow.c: Send side zero copy functions. Takes a page written
by the user and maps it copy on write and assigns it
kernel virtual address space. Removes copy on write
mapping once the buffer has been freed by the network
stack.

uipc_jumbo.c: Jumbo disposable page allocator code. This allocates
(optionally) disposable pages for network drivers that
want to give the user the option of doing zero copy
receive.

uipc_socket.c: Add kern.ipc.zero_copy.{send,receive} sysctls that are
enabled if ZERO_COPY_SOCKETS is turned on.

Add zero copy send support to sosend() -- pages get
mapped into the kernel instead of getting copied if
they meet size and alignment restrictions.

uipc_syscalls.c:Un-staticize some of the sf* functions so that they
can be used elsewhere. (uipc_cow.c)

if_media.c: In the SIOCGIFMEDIA ioctl in ifmedia_ioctl(), avoid
calling malloc() with M_WAITOK. Return an error if
the M_NOWAIT malloc fails.

The ti(4) driver and the wi(4) driver, at least, call
this with a mutex held. This causes witness warnings
for 'ifconfig -a' with a wi(4) or ti(4) board in the
system. (I've only verified for ti(4)).

ip_output.c: Fragment large datagrams so that each segment contains
a multiple of PAGE_SIZE amount of data plus headers.
This allows the receiver to potentially do page
flipping on receives.

if_ti.c: Add zero copy receive support to the ti(4) driver. If
TI_PRIVATE_JUMBOS is not defined, it now uses the
jumbo(9) buffer allocator for jumbo receive buffers.

Add a new character device interface for the ti(4)
driver for the new debugging interface. This allows
(a patched version of) gdb to talk to the Tigon board
and debug the firmware. There are also a few additional
debugging ioctls available through this interface.

Add header splitting support to the ti(4) driver.

Tweak some of the default interrupt coalescing
parameters to more useful defaults.

Add hooks for supporting transmit flow control, but
leave it turned off with a comment describing why it
is turned off.

if_tireg.h: Change the firmware rev to 12.4.11, since we're really
at 12.4.11 plus fixes from 12.4.13.

Add defines needed for debugging.

Remove the ti_stats structure, it is now defined in
sys/tiio.h.

ti_fw.h: 12.4.11 firmware.

ti_fw2.h: 12.4.11 firmware, plus selected fixes from 12.4.13,
and my header splitting patches. Revision 12.4.13
doesn't handle 10/100 negotiation properly. (This
firmware is the same as what was in the tree previously,
with the addition of header splitting support.)

sys/jumbo.h: Jumbo buffer allocator interface.

sys/mbuf.h: Add a new external mbuf type, EXT_DISPOSABLE, to
indicate that the payload buffer can be thrown away /
flipped to a userland process.

socketvar.h: Add prototype for socow_setup.

tiio.h: ioctl interface to the character portion of the ti(4)
driver, plus associated structure/type definitions.

uio.h: Change prototype for uiomoveco() so that we'll know
whether the source page is disposable.

ufs_readwrite.c:Update for new prototype of uiomoveco().

vm_fault.c: In vm_fault(), check to see whether we need to do a page
based copy on write fault.

vm_object.c: Add a new function, vm_object_allocate_wait(). This
does the same thing that vm_object allocate does, except
that it gives the caller the opportunity to specify whether
it should wait on the uma_zalloc() of the object structre.

This allows vm objects to be allocated while holding a
mutex. (Without generating WITNESS warnings.)

vm_object_allocate() is implemented as a call to
vm_object_allocate_wait() with the malloc flag set to
M_WAITOK.

vm_object.h: Add prototype for vm_object_allocate_wait().

vm_page.c: Add page-based copy on write setup, clear and fault
routines.

vm_page.h: Add page based COW function prototypes and variable in
the vm_page structure.

Many thanks to Drew Gallatin, who wrote the zero copy send and receive
code, and to all the other folks who have tested and reviewed this code
over the years.

Remove __P.

Currently, each wireless networking driver has it's own control program
despite the fact that most people want to set exactly the same settings
regardless of which card they have. It has been repeatidly suggested
that this configuration should be done via ifconfig. This patch
implements the required functionality in ifconfig and add support to the
wi and an drivers. It also provides partial, untested support for the
awi driver.

PR: 25577
Submitted by: Brooks Davis <brooks@one-eyed-alien.net>

Protect against negative numbers as well

fix typo in comment

Santize a size variable passed to kernel malloc.

Since we know there's always an upper bound we force that bound,
otherwise users can cause a panic via malloc getting hit with a
odd (huge or negative) amount of memory to allocate.

Tested by: kris
Pointed out by: Andrey Valyaev <dron@infosec.ru>

Another round of the <sys/queue.h> FOREACH transmogriffer.

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

Use <sys/queue.h> macro api rather than fondle its implementation detals.

Created with: /usr/bin/sed
Reviewed by: /sbin/md5

$Id$ -> $FreeBSD$

Hopefully make IFMEDIA_DEBUG compile. if_xname[] is a NetBSD addition,
we need if_name, if_unit. (maybe we should pick up if_xname[] ?)

Pointed out by: jkb@yahoo-inc.com

Bring the 'new-bus' to the i386. This extensively changes the way the
i386 platform boots, it is no longer ISA-centric, and is fully dynamic.
Most old drivers compile and run without modification via 'compatability
shims' to enable a smoother transition. eisa, isapnp and pccard* are
not yet using the new resource manager. Once fully converted, all drivers
will be loadable, including PCI and ISA.

(Some other changes appear to have snuck in, including a port of Soren's
ATA driver to the Alpha. Soren, back this out if you need to.)

This is a checkpoint of work-in-progress, but is quite functional.

The bulk of the work was done over the last few years by Doug Rabson and
Garrett Wollman.

Approved by: core

Staticize.

Back out DIAGNOSTIC changes.

Turn DIAGNOSTIC into a new-style option.

Removed unused #includes.

Make it compile on FreeBSD, add $Id$

This commit was generated by cvs2svn to compensate for changes in r25428,
which included commits to RCS files with non-trunk default branches.

Backend support for if_media interface ioctl's. This is for supporting
the many-mode, many-media-option type ethernet cards, in particular, the
new if_de.

Obtained from: NetBSD (Their implementation of BSDI's design)