IFC @ r222830

MFC

According to SATA specification, when Serial ATA Enclosure Management Bridge
(SEMB) is unable to communicate to Storage Enclosure Processor (SEP), in
response to hard and soft resets it should among

According to SATA specification, when Serial ATA Enclosure Management Bridge
(SEMB) is unable to communicate to Storage Enclosure Processor (SEP), in
response to hard and soft resets it should among other things return value
0x7F in Status register. The weird side is that it means DRQ bit set, which
tells that reset request is not completed. It would be fine if SEMB was the
only device on port. But if SEMB connected to PMP or built into it, it may
block access to other devices sharing same SATA port.

Make some tunings/fixes to soft-reset handling to workaround the issue:
- ahci(4): request CLO on the port after soft reset to ignore DRQ bit;
- siis(4): gracefully reinitialize port after soft reset timeout (hardware
doesn't detect reset request completion in this case);
- mvs(4): if PMP is used, send dummy soft-reset to the PMP port to make it
clear DRQ bit for us.

For now this makes quirks in ata_pmp.c, hiding SEMB ports of SiI3726/SiI4726
PMPs, less important. Further, if hardware permit, I hope to implement real
SEMB support.

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Fix some English grammar.

According to specification. device should respond to COMRESET with COMINIT
in no more then 10ms. If we detected no device presence within that time,
there is no reason to wait longer.

Properly handle memory allocation errors during error recovery.

Improve SATA Asynchronous Notification feature support in CAM:
- make SATA SIMs announce capabilities to handle SDB with Notification bit;
- make PMP driver honor this SIMs capability;
- make SATA

Improve SATA Asynchronous Notification feature support in CAM:
- make SATA SIMs announce capabilities to handle SDB with Notification bit;
- make PMP driver honor this SIMs capability;
- make SATA XPT to negotiate and enable this feature for ATAPI devices.

This feature allows supporting SATA ATAPI devices to inform system about
some events happened, that may require attention. In my case this allows
LG GH22LS50 SATA DVR-RW drive to report tray open/close events. Events
reported to CAM in form of AC_SCSI_AEN async. Further they could be used
as a hints for checking device status and reporting media change to upper
layers, for example, via spoiling mechanism of GEOM.

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As soon as siis_reset() doesn't waits for device readiness, but only for
controller port readiness (that should set just after PHY ready signal),
reduce wait time from 10s to 1s before trying more ag

As soon as siis_reset() doesn't waits for device readiness, but only for
controller port readiness (that should set just after PHY ready signal),
reduce wait time from 10s to 1s before trying more aggressive reset method.

This should improve system responsibility in some failure conditions.

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Implement automatic SCSI sense fetching for siis(4).

Fix device freeze leak on recovery request (READ LOG, REQUEST SENSE)
failure.

Merge svn+ssh://svn.freebsd.org/base/head@218816

Hardware supported by siis(4) allows software control over activity LEDs.
Expose that functionality to led(4) OR-ing it with regular LED activity.

svn+ssh://svn.freebsd.org/base/head@216199

Sync: merge r214895 through r215140 from ^/head.

Teach ahci(4), siis(4) and ATA_CAM ata(4) wrapper report to CAM residual
I/O length on underruns, that often happens for some SCSI commands.

Merge svn+ssh://svn.freebsd.org/base/head@214309

Sync: merge r214221 through r214352 from ^/head.

Add missing mtx_destroy() on channel attach failure.

Fix panic, when due to some kind of congestion on FIS-based switching
port multiplier some command triggers false positive timeout, but then
completes normally.

MFC after: 2 weeks

Merge svn+ssh://svn.freebsd.org/base/head@211344

Export PCI IDs of ATA/SATA controllers through CAM and ata(4) layers to
GEOM. This information needed for proper soft-RAID's on-disk metadata
reading and writing.

Merge svn+ssh://svn.freebsd.org/base/head@208879

Plug memory leak to silent Coverity. Error is still not really handled.

Found with: Coverity Prevent(tm)
CID: 4196

Fix attach errors handling.

Found with: Coverity Prevent(tm)
CID: 3477

Merge svn+ssh://svn.freebsd.org/base/head@208557

MFC r208410:
Report ATA/SATA channel number to NewBus at location string.