Commit Graph

442 Commits

Author SHA1 Message Date
Brooks Davis
bfc99943b0 ndis(4): remove as previous announced
nids(4) was a clever idea in the early 2000's when the market was
flooded with 10/100 NICs with Windows-only drivers, but that hasn't been
the case for ages and the driver has had no meaningful maintenance in
ages. It only supports Windows-XP era drivers.

Also remove:
 - ndis support from wpa_supplicant
 - ndiscvt(8)

Reviewed By:	emaste, bcr (manpages)
Differential Revision:	https://reviews.freebsd.org/D27609
2021-01-25 21:45:03 +00:00
Andrew Turner
94611a8388 Add missing no-ctfconvert to C generation rules
Stop running ctfconvert over generated C files in the kernel by marking
them with no-ctfconvert.

This fixes warnings from ctfconvert trying to parse C files:

ctfconvert: file.c: Couldn't read ehdr: Invalid argument

Reviewed by:	emaste, mmel
Sponsored by:	Innovate UK
Differential Revision:	https://reviews.freebsd.org/D28156
2021-01-15 09:41:41 +00:00
Emmanuel Vadot
11d62b6f31 linuxkpi: add kernel_fpu_begin/kernel_fpu_end
With newer AMD GPUs (>=Navi,Renoir) there is FPU context usage in the
amdgpu driver.
The `kernel_fpu_begin/end` implementations in drm did not even allow nested
begin-end blocks.

Submitted by: Greg V
Reviewed By: manu, hselasky
Differential Revision: https://reviews.freebsd.org/D28061
2021-01-12 12:31:00 +01:00
Robert Wing
c4df8cbfde Remove bvmconsole and bvmdebug.
Now that bhyve(8) supports UART, bvmconsole and bvmdebug are no longer needed.

This also removes the '-b' and '-g' flag from bhyve(8). These two flags were
marked deprecated in r368519.

Reviewed by:    grehan, kevans
Approved by:    kevans (mentor)
Differential Revision:  https://reviews.freebsd.org/D27490
2020-12-23 17:15:23 -09:00
Tijl Coosemans
df4ca45cf9 Fix i386 linux module after r367395.
In r367395 parts of machine dependent linux_dummy.c were moved to a new
machine independent file sys/compat/linux/linux_dummy.c and the existing
linux_dummy.c was renamed to linux_dummy_machdep.c.

Add linux_dummy_machdep.c to the linux module for i386.
Rename sys/amd64/linux32/linux_dummy.c for consistency.
Add the new linux_dummy.c to the linux module for i386.
2020-12-05 14:53:24 +00:00
Mark Johnston
2e58ec0123 Move kern_clocksource.c to sys/conf/files
Sponsored by:	The FreeBSD Foundation
2020-11-19 02:53:29 +00:00
Conrad Meyer
e9b13c6612 linux(4): Deduplicate unimpl/dummy syscall handlers
No functional change.

Reviewed by:	emaste, trasz
Differential Revision:	https://reviews.freebsd.org/D27099
2020-11-05 19:30:31 +00:00
John Baldwin
ba610be90a Add a kernel crypto driver using assembly routines from OpenSSL.
Currently, this supports SHA1 and SHA2-{224,256,384,512} both as plain
hashes and in HMAC mode on both amd64 and i386.  It uses the SHA
intrinsics when present similar to aesni(4), but uses SSE/AVX
instructions when they are not.

Note that some files from OpenSSL that normally wrap the assembly
routines have been adapted to export methods usable by 'struct
auth_xform' as is used by existing software crypto routines.

Reviewed by:	gallatin, jkim, delphij, gnn
Sponsored by:	Netflix
Differential Revision:	https://reviews.freebsd.org/D26821
2020-10-20 17:50:18 +00:00
Ed Maste
acb4cf9d6c move vmware pv drivers to sys/conf/files
VMware now has arm64 support; move these to MI files in advance of
building them on arm64.

PR:		250308
Reported by:	Vincent Milum Jr
MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
2020-10-15 14:37:51 +00:00
Emmanuel Vadot
7113afc84c 10Gigabit Ethernet driver for AMD SoC
This patch has the driver for 10Gigabit Ethernet controller in AMD
SoC. This driver is written compatible to the Iflib framework. The
existing driver is for the old version of hardware. The submitted
driver here is for the recent versions of the hardware where the Ethernet
controller is PCI-E based.

Submitted by:	Rajesh Kumar <rajesh1.kumar@amd.com>
MFC after:	1 month
Relnotes:	yes
Differential Revision:	https://reviews.freebsd.org/D25793
2020-10-11 16:01:16 +00:00
Eric Joyner
1bd641af2b ice_ddp: Update package file to 1.3.16.0
This package is intended to be used with ice(4) version 0.26.16. That
update will happen in a forthcoming commit.

MFC after:	3 days
Sponsored by:	Intel Corporation
2020-09-04 17:37:58 +00:00
Marko Zec
bd36872867 Driver for 4x10Gb Ethernet reference NIC FPGA design for NetFPGA SUME
development board.

Submitted by:	Denis Salopek <denis.salopek AT fer.hr>
Reported by:	zec, bz (src); rgrimes, bcr (manpages)
MFC after:	7 days
Sponsored by:	Google Summer of Code 2020
Differential Revision:	https://reviews.freebsd.org/D26074
2020-08-30 07:34:32 +00:00
Matt Macy
9e5787d228 Merge OpenZFS support in to HEAD.
The primary benefit is maintaining a completely shared
code base with the community allowing FreeBSD to receive
new features sooner and with less effort.

I would advise against doing 'zpool upgrade'
or creating indispensable pools using new
features until this change has had a month+
to soak.

Work on merging FreeBSD support in to what was
at the time "ZFS on Linux" began in August 2018.
I first publicly proposed transitioning FreeBSD
to (new) OpenZFS on December 18th, 2018. FreeBSD
support in OpenZFS was finally completed in December
2019. A CFT for downstreaming OpenZFS support in
to FreeBSD was first issued on July 8th. All issues
that were reported have been addressed or, for
a couple of less critical matters there are
pull requests in progress with OpenZFS. iXsystems
has tested and dogfooded extensively internally.
The TrueNAS 12 release is based on OpenZFS with
some additional features that have not yet made
it upstream.

Improvements include:
  project quotas, encrypted datasets,
  allocation classes, vectorized raidz,
  vectorized checksums, various command line
  improvements, zstd compression.

Thanks to those who have helped along the way:
Ryan Moeller, Allan Jude, Zack Welch, and many
others.

Sponsored by:	iXsystems, Inc.
Differential Revision:	https://reviews.freebsd.org/D25872
2020-08-25 02:21:27 +00:00
Eric Joyner
b4a7ce0690 ixl(4): Add FW recovery mode support and other things
Update the iflib version of ixl driver based on the OOT version ixl-1.11.29.

Major changes:

- Extract iflib specific functions from ixl_pf_main.c to ixl_pf_iflib.c
  to simplify code sharing between legacy and iflib version of driver

- Add support for most recent FW API version (1.10), which extends FW
  LLDP Agent control by user to X722 devices

- Improve handling of device global reset

- Add support for the FW recovery mode

- Use virtchnl function to validate virtual channel messages instead of
  using separate checks

- Fix MAC/VLAN filters accounting

Submitted by:	Krzysztof Galazka <krzysztof.galazka@intel.com>
Reviewed by:	erj@
Tested by:	Jeffrey Pieper <jeffrey.e.pieper@intel.com>
MFC after:	1 week
Relnotes:	yes
Sponsored by:	Intel Corporation
Differential Revision:	https://reviews.freebsd.org/D24564
2020-06-09 22:42:54 +00:00
Eric Joyner
71d104536b ice(4): Introduce new driver for Intel E800 Ethernet controllers
The ice(4) driver is the driver for the Intel E8xx series Ethernet
controllers; currently with codenames Columbiaville and
Columbia Park.

These new controllers support 100G speeds, as well as introducing
more queues, better virtualization support, and more offload
capabilities. Future work will enable virtual functions (like
in ixl(4)) and the other functionality outlined above.

For full functionality, the kernel should be compiled with
"device ice_ddp" like in the amd64 NOTES file, and/or
ice_ddp_load="YES" should be added to /boot/loader.conf so that
the DDP package file included in this commit can be downloaded
to the adapter. Otherwise, the adapter will fall back to a single
queue mode with limited functionality.

A man page for this driver will be forthcoming.

MFC after:	1 month
Relnotes:	yes
Sponsored by:	Intel Corporation
Differential Revision:	https://reviews.freebsd.org/D21959
2020-05-26 23:35:10 +00:00
John Baldwin
0e00c709d7 Remove support for DES and Triple DES from OCF.
It no longer has any in-kernel consumers via OCF.  smbfs still uses
single DES directly, so sys/crypto/des remains for that use case.

Reviewed by:	cem
Relnotes:	yes
Sponsored by:	Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D24773
2020-05-11 21:34:29 +00:00
John Baldwin
32075647ef Remove support for the Blowfish algorithm from OCF.
It no longer has any in-kernel consumers.

Reviewed by:	cem
Relnotes:	yes
Sponsored by:	Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D24772
2020-05-11 21:24:05 +00:00
Bryan Drewery
265cef40f0 Don't try ctfconvert on file without debug info.
This was currently an ignored error but will change to a hard error
eventually.

Differential Revision:	https://reviews.freebsd.org/D24536
2020-04-28 16:09:25 +00:00
Alex Richardson
4db3ef4c77 More fixes to build the kernel with a compiler that defaults to -fno-common
Using the same approach as the last commit for the files used by genassym.sh.

Obtained from:	CheriBSD
2020-04-18 12:54:40 +00:00
Conrad Meyer
f953e7317a xen-locore: Silence DWARF2 section warning
Silence the "DWARF2 can only represent one section per compilation unit"
warning in amd64 GENERIC builds by disabling Clang's debuginfo generation for
this assembler file (-g0).  The message is replaced by a warning from
ctfconvert that there is no debuginfo to convert (future work).

The file contains some metadata (several ELF notes) and some code.  The code
does not appear to have anything that debuginfo would aid.

I looked at the generated debuginfo (readelf -w xen-locore.o) prior to this
change, and the metadata that would be disabled are things like associated
between binary offset and code line number (not especially useful with a
disassembler), and label metadata for the entry points (not especially useful
as this is already in the symbol table).

Reviewed by:	royger
Differential Revision:	https://reviews.freebsd.org/D24384
2020-04-17 20:20:03 +00:00
Warner Losh
bb9c7e2658 Move font.h generation to conf/files from conf/files.*
Use ${SRCTOP} instead of /usr/share.
Prefer to depend on option sc_dflt_fnt instead of sc.
gc the 4 otherwise identical instances in the tree.
Platforms that don't need this won't included it.
2020-02-02 08:27:26 +00:00
Warner Losh
e17b7f1a03 Fix old-style build
Fix the old-style build by using ${SRCTOP} instead of a weird
construct that only works for new-style build.
Simplify the building of keymap files by using macros
Move atkbdmap.h in files.x86
This has been broken since r296899 which removed the implicit
dependency on /usr/share.
2020-02-02 08:27:20 +00:00
Dimitry Andric
f6d5b31f8b Revert r357349, since the clang 10.0.0 warning was actually correct, and
the ! operator should have been a ~ instead:

  Merge r357348 from the clang 10.0.0 import branch:

  Disable new clang 10.0.0 warnings about converting the result of
  shift operations to a boolean in tpm(4):

  sys/dev/tpm/tpm_crb.c:301:32: error: converting the result of '<<' to a boolean; did you mean '(1 << (0)) != 0'? [-Werror,-Wint-in-bool-context]
	  WR4(sc, TPM_CRB_CTRL_CANCEL, !TPM_CRB_CTRL_CANCEL_CMD);
					^
  sys/dev/tpm/tpm_crb.c:73:34: note: expanded from macro 'TPM_CRB_CTRL_CANCEL_CMD'
  #define TPM_CRB_CTRL_CANCEL_CMD         BIT(0)
					  ^
  sys/dev/tpm/tpm20.h:60:19: note: expanded from macro 'BIT'
  #define BIT(x) (1 << (x))
		    ^

  Such warnings can be useful in C++ contexts, but not so much in kernel
  drivers, where this type of bit twiddling is commonplace.  So disable
  it for this case.

Noticed by:	cem
MFC after:	3 days
2020-02-01 16:57:04 +00:00
Dimitry Andric
0a51af9191 Disable new clang 10.0.0 warnings about converting the result of shift
operations to a boolean in tpm(4):

sys/dev/tpm/tpm_crb.c:301:32: error: converting the result of '<<' to a boolean; did you mean '(1 << (0)) != 0'? [-Werror,-Wint-in-bool-context]
        WR4(sc, TPM_CRB_CTRL_CANCEL, !TPM_CRB_CTRL_CANCEL_CMD);
                                      ^
sys/dev/tpm/tpm_crb.c:73:34: note: expanded from macro 'TPM_CRB_CTRL_CANCEL_CMD'
#define TPM_CRB_CTRL_CANCEL_CMD         BIT(0)
                                        ^
sys/dev/tpm/tpm20.h:60:19: note: expanded from macro 'BIT'
#define BIT(x) (1 << (x))
                  ^

Such warnings can be useful in C++ contexts, but not so much in kernel
drivers, where this type of bit twiddling is commonplace.  So disable it
for this case.

MFC after:	3 days
2020-01-31 19:35:21 +00:00
Gleb Smirnoff
71f0077631 Remove sio(4).
It had been disconnected from build in r181233 in 2008.

Reviewed by:	imp
2019-11-21 01:24:49 +00:00
Josh Paetzel
052e12a508 Add the pvscsi driver to the tree.
This driver allows to usage of the paravirt SCSI controller
in VMware products like ESXi.  The pvscsi driver provides a
substantial performance improvement in block devices versus
the emulated mpt and mps SCSI/SAS controllers.

Error handling in this driver has not been extensively tested
yet.

Submitted by:	vbhakta@vmware.com
Relnotes:	yes
Sponsored by:	VMware, Panzura
Differential Revision:	D18613
2019-11-14 23:31:20 +00:00
Warner Losh
2a4300e9ee Move all the sys/dev/[a-j]* that are common to files.x86
All these device entries are common between the two files. Move them to
files.x86. Also sort entries from this range into proper order in files.amd64.
2019-10-30 19:53:46 +00:00
Andriy Gapon
d0c0856f63 emulate illumos membar_producer with atomic_thread_fence_rel
membar_producer is supposed to be a store-store barrier.
Also, in the code that FreeBSD has ported from illumos membar_producer
is used only with regular stores to regular memory (with respect to
caching).

We do not have an MI primitive for the store-store barrier, so
atomic_thread_fence_rel is the closest we have as it provides
(load | store) -> store barrier.

Previously, membar_producer was an empty function call on all 32-bit
arm-s, 32-bit powerpc, riscv and all mips variants.  I think that it was
inadequate.
On other platforms, such as amd64, arm64, i386, powerpc64, sparc64,
membar_producer was implemented using stronger primitives than required
for a store-store barrier with respect to regular memory access.
For example, it used sfence on amd64 and lock-ed nop in i386 (despite TSO).
On powerpc64 we now use recommended lwsync instead of eieio.
On sparc64 FreeBSD uses TSO mode.
On arm64/aarch64 we now use dmb sy instead of dmb ish.  Not sure if this
is an improvement, actually.

After this change we can drop opensolaris_atomic.S for aarch64, amd64,
powerpc64 and sparc64 as all required atomic operations have either
direct or light-weight mapping to FreeBSD native atomic operations.

Discussed with:	kib
MFC after:	4 weeks
2019-10-10 07:39:41 +00:00
Doug Ambrisko
f2521a76ed This driver attaches to the Intel VMD drive and connects a new PCI domain
starting at the max. domain, and then work down.  Then existing FreeBSD
drivers will attach.  Interrupt routing from the VMD MSI-X to the NVME
drive is not well known, so any interrupt is sent to all children that
register.

VROC used Intel meta data so graid(8) works with it. However, graid(8)
supports RAID 0,1,10 for read and write. I have some early code to
support writes with RAID 5.  Note that RAID 5 can have life issues
with SSDs since it can cause write amplification from updating the parity
data.

Hot plug support needs a change to skip the following check to work:
	if (pcib_request_feature(dev, PCI_FEATURE_HP) != 0) {
in sys/dev/pci/pci_pci.c.

Looked at by: imp, rpokala, bcr
Differential Revision:	https://reviews.freebsd.org/D21383
2019-10-10 03:12:17 +00:00
Warner Losh
7d65d42046 Fix bogusly declared WERRORs in kernel build
Many arm kernel configs bogusly specified WERROR=-Werror. There's no
reason for this because the default is that and there's no reason to
override. These date from a time when we needed to add additional
warning->error suppression. They are obsolete and were cut and paste
propagated from file to file.

Comment out all the WERROR=.... lines in powerpc. They aren't bogus,
but were appropriate for the old defaults for gcc4.2.1. Now that we've
made the policy decision to suppress -Werror by default on these
platforms, it is appropriate to comment these out. People wishing to
fix these errors can still un-comment them out, or say WERROR=-Werror
on the command line.

Fix two instances (cut and paste propagation) of hard-coded -Werror
in x86 code. Replace with ${WERROR} instead. This is a no-op change
except for people who build WERROR=-Wno-error :).

This should fix tinderbox / CI breakage.
2019-08-25 19:39:31 +00:00
Alexander Motin
96f556f504 NTB Tool: Test driver for NTB hardware drivers.
NTB Tool driver is meant for testing NTB hardware driver functionalities,
such as doorbell interrupts, link events, scratchpad registers and memory
windows.  This is a port of ntb_tool driver from Linux.  It has been
verified on top of AMD and PLX NTB HW drivers.

Submitted by:	Arpan Palit <arpan.palit@amd.com>
Cleaned up by:	mav
MFC after:	2 weeks
Relnotes:	yes
Differential Revision:	https://reviews.freebsd.org/D18819
2019-08-16 20:14:37 +00:00
Warner Losh
041f5b3611 Move the common x86 ipmi files to files.x86. The powerpc file list is different
enough that unification will have to wait for the next pass.

Reviewed by: jhb (verbal OK on irc)
Differential Revision: https://reviews.freebsd.org/D21248
2019-08-14 20:58:50 +00:00
Warner Losh
b38e67c97e The x86 part of hwpmc is shared, so move it to files.x86.
Reviewed by: jhb (verbal OK on irc)
Differential Revision: https://reviews.freebsd.org/D21248
2019-08-14 20:58:44 +00:00
Warner Losh
ff45348b5e Windows ndis support is x86 only. Move the MI parts there.
Reviewed by: jhb (verbal OK on irc)
Differential Revision: https://reviews.freebsd.org/D21248
2019-08-14 20:58:39 +00:00
Warner Losh
cfb592fa61 Intel's isci is part of the chipset, so it is x86 specific.
Reviewed by: jhb (verbal OK on irc)
Differential Revision: https://reviews.freebsd.org/D21248
2019-08-14 20:58:34 +00:00
Warner Losh
43602a9ccd Move hyperv to files.x86
Move the comomon part of hyperv to files.x86.

Reviewed by: jhb (verbal OK on irc)
Differential Revision: https://reviews.freebsd.org/D21248
2019-08-14 20:58:28 +00:00
Warner Losh
ca46f711bf The bxe driver, QLogic NetXtreme II Ethernet 10Gb PCIe adapter driver, is x86
specific, and only builds there. Likewise the module is built there. Move it to
the x86-only files.x86.

Reviewed by: jhb (verbal OK on irc)
Differential Revision: https://reviews.freebsd.org/D21248
2019-08-14 20:58:23 +00:00
Warner Losh
5f82f73635 The ACPI parts are identical between i386 and amd64
Apart from one MD file, ACPI is a x86 implementation, not specific to either
i386 or amd64, so put it into files.x86. Other architectures include fewer
files for the same options, so it can't move into the MI files file.

Reviewed by: jhb (verbal OK on irc)
Differential Revision: https://reviews.freebsd.org/D21248
2019-08-14 20:58:17 +00:00
Warner Losh
439fd246c3 Move via padlock files to files.x86.
VIA Padlock support is for VIA C3, C7 and Eden processors, which are 64bit x86
processors.

Reviewed by: jhb (verbal OK on irc)
Differential Revision: https://reviews.freebsd.org/D21248
2019-08-14 20:58:12 +00:00
Warner Losh
807e7867fd Apart from one MD file, aesni is common to x86. Move it into files.x86.
Reviewed by: jhb (verbal OK on irc)
Differential Revision: https://reviews.freebsd.org/D21248
2019-08-14 20:58:06 +00:00
Warner Losh
e80d82654f Move all the hp* drivers too files.x86
The HPT drivers are all x86 only. Move them to files.x86. Because of the way we
run uudecode, we can use $M instead of needing entries for them in separate
files.

Reviewed by: jhb (verbal OK on irc)
Differential Revision: https://reviews.freebsd.org/D21248
2019-08-14 20:58:01 +00:00
Warner Losh
286b4bedf2 Move the identical x86 lines to files.x86
Move all the identical x86 lines to files.x86. The non-identical ones should be
unified and moved as well, but that would require additional changes that would
need a more careful review and may not be MFCable, so I'll do them
separately. I'll delete the mildly snarky comment when things are unified.

Reviewed by: jhb (verbal OK on irc)
Differential Revision: https://reviews.freebsd.org/D21248
2019-08-14 20:57:54 +00:00
Warner Losh
3b4afdbe23 nvme has been moved to 'files' so shouldn't be here anymore. It works on
powerpc64 and arm64 these days as well as amd64/i386.
2019-08-13 13:41:46 +00:00
Warner Losh
b6fcc3a437 ed(4) has been removed from the tree, but these were forgotten in r347911. 2019-08-13 13:28:12 +00:00
Warner Losh
09813007a5 ukbdmap.h rule was identical on all platforms, so move them into sys/conf/files.
This allows us to remove 'nodevice ukbd' from the arm64 NOTES file.
2019-08-12 23:25:14 +00:00
Warner Losh
9246a83c85 Create files.x86
files.x86 is for the parts of the system that are common to both i386 and amd64
due too their nature. First up, to get the ball rolling, is fdc, the floppy disk
support. It works only on amd64 and i386 these days, and that's unlikely to
change.

Reviewed by: jhb, cem (earlier versrions)
Differential Revision: https://reviews.freebsd.org/D21210
2019-08-12 22:58:56 +00:00
Ed Maste
305b9efefc linuxulator: rename linux_locore.s to .asm
It is assembled using "${CC} -x assembler-with-cpp", which by convention
(bsd.suffixes.mk) uses the .asm extension.

This is a portion of the review referenced below (D18344).  That review
also renamed linux_support.s to .S, but that is a functional change
(using the compiler's integrated assembler instead of as) and will be
revisited separately.

MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D18344
2019-07-30 17:18:31 +00:00
Xin LI
d4565741c6 Remove gzip'ed a.out support.
The current implementation of gzipped a.out support was based
on a very old version of InfoZIP which ships with an ancient
modified version of zlib, and was removed from the GENERIC
kernel in 1999 when we moved to an ELF world.

PR:		205822
Reviewed by:	imp, kib, emaste, Yoshihiro Ota <ota at j.email.ne.jp>
Relnotes:	yes
Differential Revision:	https://reviews.freebsd.org/D21099
2019-07-30 05:13:16 +00:00
Alexander Motin
6683132d54 Add driver for NTB in AMD SoC.
This patch is the driver for NTB hardware in AMD SoCs (ported from Linux)
and enables the NTB infrastructure like Doorbells, Scratchpads and Memory
window in AMD SoC. This driver has been validated using ntb_transport and
if_ntb driver already available in FreeBSD.

Submitted by:	Rajesh Kumar <rajesh1.kumar@amd.com>
MFC after:	1 month
Relnotes:	yes
Differential Revision:	https://reviews.freebsd.org/D18774
2019-07-02 05:25:18 +00:00
Andriy Gapon
e3722b788e add superio driver
The goal of this driver is consolidate information about SuperIO chips
and to provide for peaceful coexistence of drivers that need to access
SuperIO configuration registers.

While SuperIO chips can host various functions most of them are
discoverable and accessible without any knowledge of the SuperIO.
Examples are: keyboard and mouse controllers, UARTs, floppy disk
controllers.  SuperIO-s also provide non-standard functions such as
GPIO, watchdog timers and hardware monitoring.  Such functions do
require drivers with a knowledge of a specific SuperIO.

At this time the driver supports a number of ITE and Nuvoton (fka
Winbond) SuperIO chips.
There is a single driver for all devices.  So, I have not done the usual
split between the hardware driver and the bus functionality.  Although,
superio does act as a bus for devices that represent known non-standard
functions of a SuperIO chip.  The bus provides enumeration of child
devices based on the hardcoded knowledge of such functions.  The
knowledge as extracted from datasheets and other drivers.
As there is a single driver, I have not defined a kobj interface for it.
So, its interface is currently made of simple functions.
I think that we can the flexibility (and complications) when we actually
need it.

I am planning to convert nctgpio and wbwd to superio bus very soon.
Also, I am working on itwd driver (watchdog in ITE SuperIO-s).
Additionally, there is ithwm driver based on the reverted sensors
import, but I am not sure how to integrate it given that we still lack
any sensors interface.

Discussed with:	imp, jhb
MFC after:	7 weeks
Differential Revision: https://reviews.freebsd.org/D8175
2019-07-01 17:05:41 +00:00