- Copy stable/10 (r259064) to releng/10.0 as part of the
10.0-RELEASE cycle.
- Update __FreeBSD_version [1]
- Set branch name to -RC1

[1] 10.0-CURRENT __FreeBSD_version value ended at '55', so
start releng/10.0 at '100' so the branch is started with
a value ending in zero.

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

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

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

Remove remaining 4.x compat shims. No resulting changes (verified by
md5).

- Explicitly call twe_done() to poll the hardware when looping in
twe_start() to simulate the behavior on 4.x where the driver dropped
spl to allow interrupts to run to free up space in the command
queue. Be careful to only poll if we are going to make at least
one more attempt to queue the current command. Also, when polling,
be careful to not call twe_startio() to queue more commands to avoid
recursion.
- Move the buffer for formatting AEN messages into the softc instead of
using a single driver-wide static buffer.

Requested by: scottl (1)
Tested by: Mike Tancsa @ Sentex

Add locking to the twe(4) driver and make it MPSAFE:
- Add per-controller configuration (sx) and I/O (mutex) locks. The
configuration lock protects the relationship of volumes and drives
while the I/O lock protects access to the controller's registers and
the main I/O path.
- Remove some checks for M_WAITOK malloc()'s failing.
- Remove the explicit bus space tag/handle from the softc and use
bus_*() rather than bus_space_*().
- Reuse the existing new-bus sysctl context instead of creating a
new one.
- Remove compat shims for FreeBSD 4.x.
- Use pci_enable_busmaster() rather than doing it by hand, and rely
on bus_alloc_resource() to enable PCI I/O decoding.

Tested by: Mike Tancsa mike sentex net
Reviewed by: scottl (partially)
MFC after: 1 month

Teach twe driver to report array stripe size to GEOM.

Change the command argument to ioctl routines to u_long to avoid
truncating the command to 32bit on 64bit archs where int is 32bit
(ie. amd64).

Approved by: scottl
Approved by: ed (mentor, implicit)

Temporarily revert the new-bus locking for 8.0 release. It will be
reintroduced after HEAD is reopened for commits by re@.

Approved by: re (kib), attilio

Make the newbus subsystem Giant free by adding the new newbus sxlock.
The newbus lock is responsible for protecting newbus internIal structures,
device states and devclass flags. It is necessary to hold it when all
such datas are accessed. For the other operations, softc locking should
ensure enough protection to avoid races.

Newbus lock is automatically held when virtual operations on the device
and bus are invoked when loading the driver or when the suspend/resume
take place. For other 'spourious' operations trying to access/modify
the newbus topology, newbus lock needs to be automatically acquired and
dropped.

For the moment Giant is also acquired in some key point (modules subsystem)
in order to avoid problems before the 8.0 release as module handlers could
make assumptions about it. This Giant locking should go just after
the release happens.

Please keep in mind that the public interface can be expanded in order
to provide more support, if there are really necessities at some point
and also some bugs could arise as long as the patch needs a bit of
further testing.

Bump __FreeBSD_version in order to reflect the newbus lock introduction.

Reviewed by: ed, hps, jhb, imp, mav, scottl
No answer by: ariff, thompsa, yongari
Tested by: pho,
G. Trematerra <giovanni dot trematerra at gmail dot com>,
Brandon Gooch <jamesbrandongooch at gmail dot com>
Sponsored by: Yahoo! Incorporated
Approved by: re (ksmith)

Add missing \n.

PR: 120341
Submitted by: CyberLeo <cyberleo@cyberleo.net>
Approved by: rwatson (mentor), aradford@amcc.com
MFC after: 3 days

Undoing recent changes to make 3ware's i386 tools work on amd64, since there are
now amd64 versions of CLI and 3DM2 available.

Fix crashdumps on twe. The twe_immediate_request() path was not only
copying data to a temporary buffer before the I/O, but also copying that
temporary buffer back to the original data location after the I/O. When
you're dumping kernel heap and stack and protected pages, this is very
very bad.

A belated thanks to Robert Watson for donating hardware for this (and future)
work.

MFC after: 3 days

Recognize the 32-bit form of the twe binary passthrough ioctl()s so that
there is some hope for the 32-bit management utilities to run. I've used
the cli successfully, but 3dm2 doesn't work for other reasons. Of course,
a native binary of the 3dm2 and cli would be much better, but that doesn't
exist.

Fix for a problem seen only on 6xxx series controllers, where-in the
driver tries to submit the same request repeatedly, on finding the
controller cmd queue to be full.

Submitted by:ps, vkashyap
Reviewed by:re
Approved by:re

1. Fixed potential problem that would cause out-of-order requests in twe_startio.
2. Changed version.

Submitted by: scottl
Reviewed by: vkashyap
Approved by: re

1. Better handle a return value of EINPROGRESS from bus_dmamap_load.
2. Check for bad return value from twe_map_request in places where there
was no checking.

Reviewed by: ps

Fix off-by-one error: sc->twe_drive is an array of TWE_MAX_UNITS elements.

Reported by: "Ted Unangst" <tedu@coverity.com>
Approved by: rwatson (mentor)

After extensive QA cycles at 3ware, bring the driver in-line with all the
issues which they found and asked to be changed so 3ware can offcially
support the driver.

Summary of the most significant changes:

- TWE_OVERRIDE is no longer supported
- If twe_getparam failed, bogus data would be returned to the caller
- Cache the device unit in the twe_drive structure to aid debugging
- Add the 3ware driver version.
- Proper return error codes for many functions.
- Track the minimum queue length statistics
- 4.x compat: use the cached unit number from the twe_drive structure
instead of the the cached si_drv2. 3ware found that after many loads
and unloads that si_drv2 became corrupted. This did not happen in
-current.

Submitted by: Vinod Kashyap (with modifications by me)
Approved by: re (rwatson)

Don't tsleep on NULL

Fix the busdma support in twe to support EINPROGRESS and enable it for
use with PAE kernels.

Properly support the 3ware generic API.

- Build SGL's for ATA_PASSTHROUGH commands
- Fallback to using the sgl_offset when the opcode is unknown for building
SGL's/
- Add ioctl calls for adding and removing units.
- Define previously undefined AEN's
- Allocate memory for the ioctl payload in multiples of 512bytes.

MFC after: 1 week

Back out M_* changes, per decision of the TRB.

Approved by: trb

Remove M_TRYWAIT/M_WAITOK/M_WAIT. Callers should use 0.
Merge M_NOWAIT/M_DONTWAIT into a single flag M_NOWAIT.

Replace (ab)uses of "NULL" where "0" is really meant.

Update for the 6.9 firmware family (6xxx controllers), as well as for
the upcoming 7.4 family (7xxx controllers).

- improved error reporting and handling
- more diagnostic output
- add extra command packet definitions
- merge sources again with -stable

Fix some unused warnings. One function is only used if
TWE_SHUTDOWN_NOTIFICATION is defined, the other two are never used.

Minor updates:

- Rework of twe_report_request to use the command status value rather
than the flags register. (Joel Jacobson @ 3ware)
- Update to match some changes in -current vs. stable.

MFC in: 1 week

Typo fix; use & to test for bits set in the status register.

Submitted by: Joel Jacobson <jake@3ware.com>

Remove a prototype for an unused and undefined debugging function.

- add support for crashdumps (courtesy of ps and Y!)
- standardise error reporting for commands
- simplify the driver-to-controller bio transfer
- add bio in/out accounting
- correctly preserve the command ID in twe_ioctl (thanks to joel@3ware)

If we can't get a command to back the bio we just took off the queue,
put the bio back, otherwise we'll drop it when we bail. This was
causing bio lossage under load, leading to eventual system lockup.

Add a missing newline to a diagnostic.

Major update to the 'twe' driver.

- Layout reorganisation to enhance portability. The driver now has
a relatively MI 'core' and a FreeBSD-specific layer over the top.
Since the NetBSD people have already done their own port, this is
largely just to help me with the BSD/OS port.

- Request ID allocation changed to improve performance (I'd been
considering switching to this approach after having failed to come
up with a better way to dynamically allocate request IDs, and seeing
Andy Doran use it in the NetBSD port of the driver convinced me
that I was wasting my time doing it any other way). Now we just
allocate all the requests up front.

- Maximum request count bumped back to 255 after characterisation
of a firmware issue (off-by-one causing it to crash with 256
outstanding commands).

- Control interface implemented. This allows 3ware's '3dm' utility to
talk to the controller. 3dm will be available from 3ware shortly.

- Controller soft-reset feature added; if the controller signals a
firmware or protocol error, the controller will be reset and all
outstanding commands will be retried.

Remove unneeded #include <machine/clock.h>

Initial import of a driver for the 3ware Escalade family of ATA RAID
controllers.