Copy stable/11@r303970 to releng/11.0 as part of the 11.0-RELEASE
cycle.

Prune svn:mergeinfo from the new branch, and rename it to RC1.

Update __FreeBSD_version.

Use the quarterly branch for the default FreeBSD.conf pkg(8) repo and
the dvd1.iso packages population.

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

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

Optimize IPMI watchdog patting.

Set watchdog timer parameters only when they really need to be changed.
In other cases just restart the timer with single Reset command instead
of two (Set and Reset).

From one side this visually reduces amount of CPU time burned in tight
loop waiting while some slow BMC configures its watchdog hardware, that
seems to be much more complicated task then just resetting the timer.

From another side on some BMCs those slow Set commands sometimes tend to
timeout, that leads to noisy log messages and even more CPU time burned,
so avoiding them can provide even bigger bonuses.

MFC after: 2 weeks

Watchdog drivers need to support rearming the watchdog in contexts which
are not permitted to sleep. Only use the IPMI watchdog with backends
which poll driver-initiated requests to meet this requirement.

In practice this means that watchdogs will no longer be used on systems
that use the SSIF backend.

Differential Revision: https://reviews.freebsd.org/D2062
MFC after: 2 weeks

Use direct hardware access for internal requests for KCS and SMIC. In
particular, updates to the watchdog should no longer sleep.
- Add a new IPMI_IO_LOCK for low-level I/O access. Use this for
kcs_polled_request() and smic_polled_request().
- Add a new backend callback "ipmi_driver_request" to handle a driver
request. The new callback performs the request sychronously for KCS
and SMIC. SSIF still defers the work to the worker thread since the
worker thread sleeps during request processing anyway.
- Allocate driver requests on the stack rather than using malloc().

Differential Revision: https://reviews.freebsd.org/D1723
Tested by: scottl
MFC after: 2 weeks

Provide a crutch that prevents watchdog to interrupt dumping
on a box with IPMI enabled.

Okay from: jhb
Sponsored by: Netflix
Sponsored by: Nginx, Inc.

Don't try to stop the IPMI watchdog timer if it is not running.
Starting or stopping the IPMI watchdog is rather expensive with the
current implementation as all IPMI requests are bounced via thread.
This is not viable during shutdown or dumps, and this avoids headache
in the common case that the watchdog is not enabled. The IPMI watchdog
should probably be reworked to not use a separate thread to fix this
in the case when the watchdog timer is enabled.

MFC after: 2 weeks

Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs.

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

Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs.

This means that their use is restricted to a single C file.

Fixed firmware revision decoding:
- the major is 7-bit binary encoded
- the minor is BCD encoded

PR: kern/151586
MFC after: 3 days

- Fixed incorrect watchdog timeout setting: MSB of a 2-byte
value is obtained by dividing it by 256, not by 2550; also,
one second is 10^9 nanoseconds, not 1800000000 nanoseconds.

- Due to rounding error, setting watchdog to a really small
timeout (<1 sec) was turning the watchdog off. It should
set the watchdog to a small timeout instead.

- Implemented error checking in ipmi_wd_event(), as required
by watchdog(9).

PR: kern/130512
Submitted by: Dmitrij Tejblum

- Additionally, check that the timeout value is within the
supported range, and if it's too large, act as required by
watchdog(9).

MFC after: 3 days

Fix typo where the code was missing the "IPMICTL_RECEIVE_MSG_32" condition
test.

Remove hack attempt at using devfs cloning for per-file descriptor storage.
Use the much simpler cdevpriv for per-fd state and enable it. This allows
multiple opens of /dev/ipmi0 (e.g. using ipmitool while ipmievd is running
in the background).

MFC after: 1 week

Revisit the watchdogs: Resetting the error to EINVAL after failing to set the
watchdog might hide the succesful arming of an earlier one. Accept that on
failing to arm any watchdog (because of non-supported timeouts) EOPNOTSUPP is
returned instead of the more appropriate EINVAL.

MFC after: 3 days

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

o add an int return code to all fast handlers

o retire INTR_FAST/IH_FAST

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

Reviewed by: many
Approved by: re@

Align the interfaces for the various watchdogs and make the interface
behave as expected.

Also:
- Return an error if WD_PASSIVE is passed in to the ioctl as only
WD_ACTIVE is implemented at the moment. See sys/watchdog.h for an
explanation of the difference between WD_ACTIVE and WD_PASSIVE.
- Remove the I_HAVE_TOTALLY_LOST_MY_SENSE_OF_HUMOR define. If you've
lost your sense of humor, than don't add a define.

Specific changes:

i80321_wdog.c
Don't roll your own passive watchdog tickle as this would defeat the
purpose of an active (userland) watchdog tickle.

ichwd.c / ipmi.c:
WD_ACTIVE means active patting of the watchdog by a userland process,
not whether the watchdog is active. See sys/watchdog.h.

kern_clock.c:
(software watchdog) Remove a check for WD_ACTIVE as this does not make
sense here. This reverts r1.181.

Fix some edge cases in detach() as well as a memory leak if we fail to
talk to the BMC.

Reported by: Alexander Logvinov : ports at logvinov_com
MFC after: 1 week

ipmi_polled_enqueue_request() is already called with the lock held, just
assert it rather than recursing.

Reported by: mjacob
Pointy hat: jhb
MFC after: 3 days

Fix a memory leak in ipmi_unload().

CID: 1542
Found by: Coverity Prevent

Update the ipmi(4) driver:
- Split out the communication protocols into their own files and use
a couple of function pointers in the softc that the commuication
protocols setup in their own attach routine.
- Add support for the SSIF interface (talking to IPMI over SMBus).
- Add an ACPI attachment.
- Add a PCI attachment that attaches to devices with the IPMI interface
subclass.
- Split the ISA attachment out into its own file: ipmi_isa.c.
- Change the code to probe the SMBIOS table for an IPMI entry to just use
pmap_mapbios() to map the table in rather than trying to setup a fake
resource on an isa device and then activating the resource to map in the
table.
- Make bus attachments leaner by adding attach functions for each
communication interface (ipmi_kcs_attach(), ipmi_smic_attach(), etc.)
that setup per-interface data.
- Formalize the model used by the driver to handle requests by adding an
explicit struct ipmi_request object that holds the state of a given
request and reply for the entire lifetime of the request. By bundling
the request into an object, it is easier to add retry logic to the various
communication backends (as well as eventually support BT mode which uses
a slightly different message format than KCS, SMIC, and SSIF).
- Add a per-softc lock and remove D_NEEDGIANT as the driver is now MPSAFE.
- Add 32-bit compatibility ioctl shims so you can use a 32-bit ipmitool
on FreeBSD/amd64.
- Add ipmi(4) to i386 and amd64 NOTES.

Submitted by: ambrisko (large portions of 2 and 3)
Sponsored by: IronPort Systems, Yahoo!
MFC after: 6 days

Since DELAY() was moved, most <machine/clock.h> #includes have been
unnecessary.

Don't conflict with the DEBUG define.

Add an OpenIPMI mostly compatible driver. This driver was developed
to work with ipmitools. It works with other tools that have an OpenIPMI
driver interface. The port will need to get updated to used this.
I have not implemented the IPMB mode yet so ioctl's for that don't
really do much otherwise it should work like the OpenIPMI version.
The ipmi.h definitions was derived from the ipmitool header file.
The bus attachments are done for smbios and pci/smbios. Differences
in bus probe order for modules/static are delt with. ACPI attachment
should be done.

This drivers registers with the watchdod(4) interface

Work to do:
- BT interface
- IPMB mode

This has been tested on Dell PE2850, PE2650 & PE850 with i386 & amd64
kernel.

I will link this into the build on next week.

Tom Rhodes, helped me with the man page.

Sponsored by: IronPort Systems Inc.
Inspired from: ipmitool & Linux