IFC @ r255209

Consistently init all mmc request, command, and data structures to zero
before using them.

IFC @ r254014

IFC @ r253461

IFC @253398

Use meaningful names when creating mmc/sd threads.

This can be useful when we want to be able to identify which mmcsd is stuck.

Merge fresh head.

When reporting the user readable size, round up. Several SD cards not
only use SI units, but also are a couple of percent short. If you need
to know the exact size, diskinfo will return exact results.

Print MB and GB instead of MiB and GiB mislabeled as MB and GB.
SD cards are sold in GB not GiB, this will result in less confusion.
Also, cache parent device pointer to save a few cycles for loops.

sync from head

Set the backlink in mmc commands to the mmc request that contains them.

MFC @ r241285

IFC @ r242684

Sync from head

Merge head r233826 through r240095.

The check for MAXPHYS doesn't make sense, so remove it.
Report errors indicated by the transport. If this is too chatty, I'll
throw it behind a debug write.
Remove commented out debugs that are no l

The check for MAXPHYS doesn't make sense, so remove it.
Report errors indicated by the transport. If this is too chatty, I'll
throw it behind a debug write.
Remove commented out debugs that are no longer useful.

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IFC @238412.

IFC @ r238370

Merge head r233826 through r236557.

Add missing prototypes. While at it, sort them alphabetically.

MFC after: 3 days

MFC

Merge head r233826 through r234834.

IFC @ r234692

sys/amd64/include/cpufunc.h
sys/amd64/include/fpu.h
sys/amd64/amd64/fpu.c
sys/amd64/vmm/vmm.c

- Add API to allow vmm FPU state init/save/restore.

FP stuff discussed with: kib

o Fixes:
- When switching to 4-bit operation, send a SET_CLR_CARD_DETECT command
to disconnect the card-detect pull-up resistor from the DAT3 line before
sending the SET_BUS_WIDTH command.

o Fixes:
- When switching to 4-bit operation, send a SET_CLR_CARD_DETECT command
to disconnect the card-detect pull-up resistor from the DAT3 line before
sending the SET_BUS_WIDTH command.
- Add the missing "reserved" zero entry to the mantissa table used to
decode various CSD fields. This was causing SD cards to report that they
could run at 30 MHz instead of the maximum 25 MHz mandated in the spec.
o Enhancements:
- At the MMC layer, format various info from the CID into a string that
uniquely identifies the card instance (manufacturer number, serial
number, product name and revision, etc). Export it as an instance
variable.
- At the MMCSD layer, display the formatted card ID string, and also
report the clock speed of the hardware (not the card's max speed), and
the number of bits and number of blocks per transfer. It comes out like
this now:
mmcsd0: 968MB <SD SD01G 8.0 SN 276886905 MFG 08/2008 by 3 SD> at mmc0
22.5MHz/4bit/128-block
o Use DEVMETHOD_END.
o Use NULL instead of 0 for pointers.

PR: 156496
Submitted by: Ian Lepore
MFC after: 1 week

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IFC @ r225592

sys/dev/bvm/bvm_console.c - move up to the new alt-break order.