write performance when tagged queueing is enabled.
Although the PR was submitted for the 4 gig version of this drive, the
assumption is that the 2 gig version has the same problem. Therefore
tagged queueing is disabled for both.
Also, update the comment for the Western Digital Enterprise drives to note
that the best performance for those drives is achieved when tagged queueing
is disabled and write caching is enabled.
PR: kern/10398
Submitted by: Hideaki Okada <hokada@isl.melco.co.jp>
trouble with tagged queueing as the 6.5 gig version.
So, I've added a quirk entry for it to limit it to two outstanding
transactions at a time, just like the 6.5G version. While I'm at it, add a
quirk for the 9G version of the drive, since it most likely has the same
problem.
Submitted by: Jeremy Lea <reg@shale.csir.co.za>
emulator so that instances can be dynamically added and removed from the
system.
Properly reference count peripheral instances so they are cleaned up when
destroyed by the control device.
Set a timeout for test unit ready commands. Before it was uninitialized
and could cause us to drop off the bus when no real timeout had occurred.
caused by temporary EDT allocations performed by controller drivers in
their interrupt routiens.
Reference count bus entries in the EDT in preparation for support for
dynamic controller arrival and departure.
Have children of the EDT hold references to their parents.
Correct routing of the XPT_IMMED_NOTIFY ccb type for use in
target mode applications.
Fix a few cases where the generation count for EDT data members was
not being updated when a modification occurred.
splcam() problem Noticed by: Tor Egge <tegge@FreeBSD.org>
catch a T4000s)
+ Set *some* kind of error at EOM if we're in fixed mode and have pending errs.
Do not clear the ERR_PENDING bit if more buffers are queued.
+ Release the start_ccb in this case also, else we hang forever on rewinding.
+ Any kind of error for load to BOT in samount should then cause an attempt
to use REWIND to come back to BOT. Do the initial load command quietly.
+ In samount, if we succeed, set the relative position markers.
drive has very poor write performance (1.4MB/sec vs. 12MB/sec) with anything
more than two oustanding transactions.
So, this limits the number of tagged commands to two for that drive.
Thanks to Paul van der Zwan for doing a whole lot of testing to confirm
this.
Reported by: Paul van der Zwan <paulz@trantor.xs4all.nl>
Sync rates like 4.032MHz were getting printed as 4.32MHz.
Also, add a quirk entry for the 18G Quantum Atlas III. Like most other
recent Quantum drives, it bogusly reports queue full. Thanks to Andre
Albsmeier <andre.albsmeier@mchp.siemens.de> for the Atlas III inquiry
information.
Reviewed by: gibbs
peripheral drivers can determine where in the devstat(9) list they are
inserted.
This requires recompilation of libdevstat, systat, vmstat, rpc.rstatd, and
any ports that depend on the devstat code, since the size of the devstat
structure has changed. The devstat version number has been incremented as
well to reflect the change.
This sorts devices in the devstat list in "more interesting" to "less
interesting" order. So, for instance, da devices are now more important
than floppy drives, and so will appear before floppy drives in the default
output from systat, iostat, vmstat, etc.
The order of devices is, for now, kept in a central table in devicestat.h.
If individual drivers were able to make a meaningful decision on what
priority they should be at attach time, we could consider splitting the
priority information out into the various drivers. For now, though, they
have no way of knowing that, so it's easier to put them in an easy to find
table.
Also, move the checkversion() call in vmstat(8) to a more logical place.
Thanks to Bruce and David O'Brien for suggestions, for reviewing this, and
for putting up with the long time it has taken me to commit it. Bruce did
object somewhat to the central priority table (he would rather the
priorities be distributed in each driver), so his objection is duly noted
here.
Reviewed by: bde, obrien
of the minor). Establish and use a control mode open. Control
mode opens may open the device without locking, but are prohibited
from all but some ioctls. MTIOCGET always works. MTIOCERRSTAT
works, but the clearing of latched error status is contingent
upon whether another application has the device open, in which
case an interruptible perip acquire is done. MTSETBSIZ, MTSETDNSTY
and MTCOMP also require a periph aquire.
Relative fileno and blkno are tracked. Note that just about any
error will make these undefined, and if you space to EOD or use
hardware block positioning, these are also lost until the next
UNLOAD or REWIND.
Driver state is also tracked and recorded in the unit softc
to be passed back in mt_dsreg for a MTIOCGET call.
Thanks to Dan Strick for suggesting this.
Reintroduce 2 filemarks at EOD for all but QIC devices. I
really think it's wrong, but there is a lot of 3rd party
software that depends upon this (not the least of which is
tcopy). Introduce a SA_QUIRK_1FM to ensure that some devices
can be marked as only being able to do 1 FM at EOD.
At samount time force a load to BOT if we aren't mounted. If the
LOAD command fails, use the REWIND command (e.g., for the IBM 3590
which for some gawdawful reason doesn't support the LOAD (to BOT)
command).
Also at samount time, if you don't know fixed or variable, try to
*set* to one of the known fixed (or variable, for special case)
density codes. We only have to do this once per boot, so it's not
that painful. This is another way to try and figure out the wierd
QIC devices without having to quirk everything in the universe.
A substantial amount of cleanup as to what operations can and what
operations cannot be retried. Don't retry space operations if they
fail- it'll just lead to lossage.
Not yet done is invalidating mounts correctly after errors. ENOTIME.
changes to the VM system to support the new swapper, VM bug
fixes, several VM optimizations, and some additional revamping of the
VM code. The specific bug fixes will be documented with additional
forced commits. This commit is somewhat rough in regards to code
cleanup issues.
Reviewed by: "John S. Dyson" <root@dyson.iquest.net>, "David Greenman" <dg@root.com>
its original form. (Originally, it only applied to the CFP 2107.)
Hopefully we can come to some conclusion about which Conner drives are
broken for tagged queueing.
the CFP2107, but it appears (not surprisingly) that the 1 gig and 4 gig
versions of that drive have the same problem with tagged queueing.
Also, fix the problem reported in PR kern/9482. The XPT_DEV_MATCH case in
xptioctl() wasn't putting a proper path in the CCB before it called
xpt_action(). When CAMDEBUG is defined, and CAM_DEBUG_TRACE debugging is
turned on, the CAM_DEBUG statement at the beginning of xpt_action would end
up deferencing a NULL path pointer. That of course caused a panic.
My solution is to just stick the xpt peripheral's path in the CCB.
PR: kern/9482
Reviewed by: gibbs
idiot about testing SA_QUIRK_2FM in samount. Fixed.
Removed the NORRLS quirk (to save quirk space) and left
the behaviour of being quiet about failed reserve/release
(failed due Illegal Request) the same.
Added a SF_QUIET_IR for prevent/allow for the same purposes.
(<blank@fox.uni-trier.de>) about quirks being set as
arithmetic values, not as bitfields. Add HP, Kennedy
and M4 1/2" reel quirk entries.
Do a lot of gratuitous source changing.
Audit all functions that build ccbs for the tape driver
and decide whether each one can be retried or not.
Still to do is some more state management post errors.
'Black Hole' device uses this feature to schedule itself against any
target or lun attached to a controller that receives an unwanted request
from an initiator instead of having an instance per potential target/lun
request.
Use the wildcard entries to simplify wildcard async callback storage.
Don't announce devices twice to peripheral drivers. The devices will
be announced as soon as the AC_PATH_REGISTERED event is registered by
the peripheral driver, so no manaul push of this event is required.
Reviewed by: Kenneth Merry <ken@FreeBSD.org>
data and sense information for target mode devices for which no other
peripheral driver is attached. This simplifies the task of dealing with
luns that are not otherwise enabled for target mode if the controller
does not have firmware that automatically deals with this case (e.g.
the aic7xxx driver).
from the old driver. Change format of quirk table to have a preferred block
size for devices that need to be QUIRK_FIXED- this is loaded into the
last_media_blocksize tag at saregister time and will be used in the first
samount case.
Change sasetparams to take a sense_flags argument so that probe time testing
can be quieter (e.g. with SF_NO_PRINT).
Fix a couple of silly bugs in the fixed/variable determination in samount- one
was where there was a check against 'guessing' AND the density code being
default density- *SMACK* - you're only guessing if you find the media code
to be *other* than default density. Second bug was a test against current
blocksize being zero- should be a test against whether current blocksize
is not equal to the last blocksize if you had wanted to be fixed (suppose
you came up in fixed, but not the preferred size?). And if you don't
know what the fixed size should be, select 512 as the starting point,
not BLKDEV_IOSIZE (reality wins). Finally, in doing the test set to variable
mode, make sasetparams non-chatty.
to release the probe ccb before taking down the periph.
Also, don't do cdscheduling if you're not going to
attach the device after all.
Reviewed by: ken@freebsd.org
It keeps returning queue full until we have reduced the number of tagged
openings to the minimum.
So, put in a quirk entry with the same work-around. This quirk entry is
only for the 9G Atlas III, once someone comes up with inquiry information
for the 18G version of that drive, we can quirk it as well.
Submitted by: "Johan Granlund" <johan@granlund.nu>
the quirk that disables tagged queueing for those drives.
Also, silence a warning by disabling xpt_for_all_targets() and
xpt_for_all_periphs(). These two functions are not currently used, but
they should not be removed. They're part of a set of functions that
provide a way to execute a function for every {bus,target,device,periph} in
the system.
If anyone needs to use either function in the future, they can be
un-#ifdefed.
CAPACITY fail for a non-removable media device. There's a race
condition where the device entry is removed and then
xpt_release_ccb is called which attempts to give back the ccb
to a device that's now gone. In this bandaid release the ccb
early and then remember to not call xpt_release_ccb later.
will) get set for the devices that don't actually support
reserve/release (so we don't keep trying it).
Add softc storage and manage storing last I/O and CTL
commands that had errors (for correlative purposes).
In saclose clear the 'MOUNTED' bit if we either rewind or
unload (yes, this shouldn't be necessary since the next open
should catch whether a tape change occurred, but I'm having
some questions about that actually working so this is
safer for the moment). Oh, forgot to mention in previous
commit messages that some of the failures particularly at
close time cause the tape to be ejected (for the sake
of safety)- all this prior to redoing the state machine
(which is in progress) which will try and handle this better.
Complete the addition of the setmark support
(from Martin.Birgmeier@aon.at).
