add mpi_inq. this is a custom io function that does an inquiry against
either a normal target, or against a physical disk using the raid passthru
command. it is necessary since the normal io path can

add mpi_inq. this is a custom io function that does an inquiry against
either a normal target, or against a physical disk using the raid passthru
command. it is necessary since the normal io path can only be used by the
midlayer, and only against normal targets. this will be used for ppr
against the disks in raid volumes on scsi controllers.

tested by marco@

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split some fields up in the spi port and dev config pages. makes the ppr
code easier since we dont have to byteswap and shift stuff around so much.
no functional change though.

theres a ton of 32bit fields in mpi messages that have subfields that lie
on byte boundaries. so rather than byteswappping and bitshifting the
values in these subfields around we can break them up in

theres a ton of 32bit fields in mpi messages that have subfields that lie
on byte boundaries. so rather than byteswappping and bitshifting the
values in these subfields around we can break them up into byte fields and
access them directly.

this breaks up the control field in the scsi io command.

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Everytime one forgets an argument in a printf-like function call, God kills
a kitten. Commiters, please think of the kittens when working on code.

Make mpi not spit out WWNN and WWPN as requested by deraadt and dlg. Do
store these values in the scsi_link structure for each device.

ok dlg.

Don't walk memory whenever there is nothing there. I ran into this while
debugging FC stuff.

Print World Wide Node Name and World Wide Port Name during dmesg so that
we can actually find the drives on the fabric. Requested by kettenis krw
and brad.

ok dlg

vmware emulates mpi, but it does a half arsed job of it. half the fields
we read off the hardware and use to configure the driver with are set to
zero, so things dont really work like we want them to

vmware emulates mpi, but it does a half arsed job of it. half the fields
we read off the hardware and use to configure the driver with are set to
zero, so things dont really work like we want them to.

one of these fields is the pci subsystem id which is something we can fetch
really early in the attach process. so if the subsys is 0 then we go on and
fix up some of the values we get off the "hardware". now we can attach
disks on vmware.

"sneaky" and ok marco@ tested by and ok brad@

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Add detection of RAID volume during PPR. Doesn't fan out the ppr to individual
devices yet.

Add IOC page 3 support. Needed for RAID and bio.

Print volume details in debug.

And now without a buffer overflow. Pointed out by dlg. No cookie for me.

Add structures and initial code to retrieve IOC page 2. We need this for
RAID support and bio. "go at it" dlg

Print some useful error information during failure. We need this to be able
to diagnose field issues. Talked through with dlg.

we sometimes bundle chunks that the ioc will write to in the request space
as well as the request itself, so we need to sync the memory in both
directions for dma.

i stashed the dva and kva of each request space in its ccb, so why am i
recalculating them whenever i want to use them? shorten code a bit by using
the stored values.

fix sgl loading. there were a few issues, the main ones being:
- when the sgl grew too large it became bigger than the maximum frame size
that the ioc would deal with, and then it would just stop doi

fix sgl loading. there were a few issues, the main ones being:
- when the sgl grew too large it became bigger than the maximum frame size
that the ioc would deal with, and then it would just stop doing io. i was
using the wrong field from iocfacts to figure out how large an sgl should
be.
- chained sgls were broken cos i was including the current chain element in
the calculation of the offset to the next chain element.

big ok from marco@

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reset the reply pointer to NULL every time we get a context reply in
mpi_interrupt and mpi_completion. if we got an address reply followed by a
context reply we used to pass that same reply to both c

reset the reply pointer to NULL every time we get a context reply in
mpi_interrupt and mpi_completion. if we got an address reply followed by a
context reply we used to pass that same reply to both completion routines.

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white space fixes

Initial version of dv for scsi. Work based on dlg's code.
ok dlg

Make id in mpi_complete an unused value instead of random stack garbage.
This was causing the "empty portfacts" issue since the IOC wasn't complete
yet with the request however since the id would mat

Make id in mpi_complete an unused value instead of random stack garbage.
This was causing the "empty portfacts" issue since the IOC wasn't complete
yet with the request however since the id would match the requested id the
timeout was a terminal condition.

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if we're not reading a page then we're writing a page. stupid braino from
me pointed out by marco.

Redo debug prints to make it less loud and more granular.

ok dlg

unsigned long long -> u_int64_t

dont panic on empty portfacts or portenable replies. we should probably
retry the init sequence if this happens.