Merge ^/head r311692 through r311807.

In mmcsd_task(), bio_resid was not being set to 0 on a successful read
or write, resulting in random short-read and short-write returns for
requests. Fixing this fixes nominal block I/O via mmcsd(4).

In mmcsd_task(), bio_resid was not being set to 0 on a successful read
or write, resulting in random short-read and short-write returns for
requests. Fixing this fixes nominal block I/O via mmcsd(4).

Obtained from: DragonFlyBSD (fd4b97583be1a1e57234713c25f6e81bc0411cb0)
MFC after: 5 days

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Merge ^/head r295601 through r295844.

MFH

Sponsored by: The FreeBSD Foundation

Create an API to reset a struct bio (g_reset_bio). This is mandatory
for all struct bio you get back from g_{new,alloc}_bio. Temporary
bios that you create on the stack or elsewhere should use this b

Create an API to reset a struct bio (g_reset_bio). This is mandatory
for all struct bio you get back from g_{new,alloc}_bio. Temporary
bios that you create on the stack or elsewhere should use this before
first use of the bio, and between uses of the bio. At the moment, it
is nothing more than a wrapper around bzero, but that may change in
the future. The wrapper also removes one place where we encode the
size of struct bio in the KBI.

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Catch up with HEAD (r280229-r284686).

Merge from head

Merge ^/head r283596 through r283770.

Do not set d_fwsectors nor d_fwheads. Primarily because the values
tend to be invalid. On a Beaglebone Black, we get 8192 sectors per
track and that causes major breakages.

Differential Revision: D2

Do not set d_fwsectors nor d_fwheads. Primarily because the values
tend to be invalid. On a Beaglebone Black, we get 8192 sectors per
track and that causes major breakages.

Differential Revision: D2646
Reviewed by: ian@ imp@

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Merge sync of head

MFhead @ r277403

Reintegrate head: r274132-r277384

Sponsored by: The FreeBSD Foundation

Reintegrate head revisions r273096-r277147

Sponsored by: The FreeBSD Foundation

Rate-limit error logging to 5 lines per second, so that when an sdcard
goes bad it doesn't lock up the console with continuous output.

Merge from head@274682

Sync to HEAD@r274095.

IFC @r273206

fwsectors and fwheads used to be somehwat arbitrary. However, they are
used to align partitions in gpart. We also try to align partitions by
stripe size when creating new media. Align these two conce

fwsectors and fwheads used to be somehwat arbitrary. However, they are
used to align partitions in gpart. We also try to align partitions by
stripe size when creating new media. Align these two concepts by
making fwsectors the same as the stripe size. Select a sensible number
of heads so we wind up with about 20 cylinders. This number was
selected to keep the rounding effects to a few percent while keeping
the number of cylinder groups low.

Sadly, it is not possible to make these numbers match the numbers used
by SD card readers. There apperas to be much variation between brands
so there's no one universal number. These numbers are also not aligned
to the stripe size, so some performance problems may still be present
when SD cards are created this way.

Also, these numbers will differ from the far less common SD to ATA
adapters, which present a different, but more uniform, set of numbers
that also happened to match the old defaults.

Nothing should change for current users. Any suboptimal performance
caused by misalignment will still be there. gpart will honor the
partitions that aren't on proper boudnaries, but editing the partition
tables may result in different alignments being used than before when
editing things natively.

Ideally, there'd be some way to override these values in the disk
subsystem by the user for the USB adapter use case where all "native"
notions of geometry disappear. This does not implement that.

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IFC @r269962

Submitted by: Anish Gupta (akgupt3@gmail.com)

Sync to HEAD@r269943.

Export an mmc or sd card's serial number from the mmc layer as an ivar.
In the mmcsd layer use this value to populate disk->d_ident. Also set
disk->d_descr to the full set of card identification inf

Export an mmc or sd card's serial number from the mmc layer as an ivar.
In the mmcsd layer use this value to populate disk->d_ident. Also set
disk->d_descr to the full set of card identification info (includes vendor,
model, manufacturing date, etc).

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Merge head r233826 through r256722.

IFC @256277

Approved by: ken (mentor)

IFC @ r255692

Comment out IA32_MISC_ENABLE MSR access - this doesn't exist on AMD.
Need to sort out how arch-specific MSRs will be handled.

Merge from head