Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

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

Improving r249461 by providing a better way to handle the clang warning.

PR: kern/177164
Reviewed by: jhb
Approved by: sbruno (mentor)

Fixing a clang warning indicating uninitialized variable usage.

PR: kern/177164
Approved by: sbruno (mentor)

o Add Adaptec ServeRAID 7x IDs. IDs taken from Linux.

PR: kern/90012
Submitted by: Andrey V. Elsukov
MFC after: 1 month

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

Separate the hardware definitions into ipsreg.h so they can be used by
future userland tools.

Overhaul error handling in the IPS driver. Don't use a magic value for
driver-induced errors, instead be better about propagating error status
upwards. Add more error definitions, courtesy of the linux driver. Fix
a command leak in the ioctl handler. Re-arrange some of the command handlers
to localize error handling.

MFC After: 3 days

Remove an extra mutex unlock in the morpheus interrupt handler.

PR: 80246
Submitted by: Dean Strik
MFC After: 3 days

Add crashdump support to the ips driver. It only works for the more modern
ServeRAID 4 - 7 models right now. Support for older cards is possible, but
I don't have any hardware to experiment with.

Thanks to Jack Hammer at Adaptec for providing debugging hints.

Sponsored by: ImproWare AG, Switzerland

Remove all of the spl() markers.

Lock the IPS driver and bring it out from under Giant. Also do some
significant clean up and optimizations:
- don't call bioq_disksort() on every command, the hardware will do that for
us.
- remove all of the complicated bio deferral code. bio's that can't be
serviced immediately can just wait on the bioq.
- Only reserve one command object for doing control commands to the card.
This simplifies a lot of code and significantly reduces the size of the
command struct.
- Allocate commands out of a slab instead of embedding them into the softc.
- Call the command action method directly instead of having ips_get_free_cmd()
call it indirectly.

MFC After: 1 week

Do the dreaded s/dev_t/struct cdev */
Bump __FreeBSD_version accordingly.

Use a unique malloc type rather than M_DEVBUF.

Switch from using mutexes to using semaphores to protect against early
completion of synchronous commands. Also switch to a per-array bioq as it
appears to improve performance.

Submitted by: mbr, imp.ch (bioq change)

Device megapatch 4/6:

Introduce d_version field in struct cdevsw, this must always be
initialized to D_VERSION.

Flip sense of D_NOGIANT flag to D_NEEDGIANT, this involves removing
four D_NOGIANT flags and adding 145 D_NEEDGIANT flags.

Remove the static major assignment for ips(4).

Submitted by: phk, inspired by others.

Use same style for cdevsw as the rest of our drivers.

Fixed a memory leak.

Reported by: Stanford Metacompilation research group
Reviewed by: scottl

ServeRaid (at least 5i) didn't initialize correctly. To get
them working (cache, automatic rebuild and hotswap) the FFDC
info (First Failure Data Capture) on the adapter must be
initialised.

Logical drives in critical/degraded states weren't added to
the drive list. FreeBSD was not able to see a degraded array
after a reboot. Degraded drives are now also added to the drivelist
and the state of the logical drive is given at boottime.

The adapter type is detected from informations in nvram page 5
and displayed at boottime.

Change IPS_OS_FREEBSD definition from 10 to 8 according to IBM
specs.

Submitted by: <Patrick Guelat> pgfb@imp.ch
Reviewed by: mbr, scottl
Approved by: re

Use __FBSDID().
Also some minor style cleanups.

Mega busdma API commit.

Add two new arguments to bus_dma_tag_create(): lockfunc and lockfuncarg.
Lockfunc allows a driver to provide a function for managing its locking
semantics while using busdma. At the moment, this is used for the
asynchronous busdma_swi and callback mechanism. Two lockfunc implementations
are provided: busdma_lock_mutex() performs standard mutex operations on the
mutex that is specified from lockfuncarg. dftl_lock() is a panic
implementation and is defaulted to when NULL, NULL are passed to
bus_dma_tag_create(). The only time that NULL, NULL should ever be used is
when the driver ensures that bus_dmamap_load() will not be deferred.
Drivers that do not provide their own locking can pass
busdma_lock_mutex,&Giant args in order to preserve the former behaviour.

sparc64 and powerpc do not provide real busdma_swi functions, so this is
largely a noop on those platforms. The busdma_swi on is64 is not properly
locked yet, so warnings will be emitted on this platform when busdma
callback deferrals happen.

If anyone gets panics or warnings from dflt_lock() being called, please
let me know right away.

Reviewed by: tmm, gibbs

Fix pointer/int warnings so this compiles on amd64. The driver wants
to store an int in the bio->bio_driver1 (a void *). It is big enough,
but you have to match the int sizes first before doing the cast.

Glanced at by: scottl

- Zero the buffers used to hold configuration data from the card. Not doing
so can leave stale data in the buffer and confuse the driver.
- enable the ability to set the 'disable' hint for the driver to keep it
from attaching. i.e. 'hw.ips.0.disable=1' will prevent the driver from
attaching.
- Only detach if attach suceeded.

Submitted by: mjacob

Add the 'ips' driver for the IBM (now Adaptec) ServeRAID controller
series. This driver was generously developed and released by David
Jeffreys and Adaptec. I've updated it to work with 5.x and fixed a
few bugs.

MFC After: 1 week