- Use the plain words 'disk' and 'tape' instead of 'direct' and 'sequential'.
- Media status will be printed in the frontend, so don't bother with it.
- Don't bother printing the SCSI version, which is fixed these days, or the
numberic device type.
This eliminates problems where the underlying interrupt handler isn't the
specific layer calling scsipi_complete() for a given scsi transaction.
This avoids deadlocks where the kthread that called the autoconf routines
to configure a scsibus shouldn't be the one put to sleep waiting on a
scsipi_complete (only the scsibus's kthread should be doing that).
To avoid jitter this will force the scsibus's to probe in the order they
run through autoconf (so machines with multiple bus's don't move sd* devices
around on every reboot).
This merge changes the device switch tables from static array to
dynamically generated by config(8).
- All device switches is defined as a constant structure in device drivers.
- The new grammer ``device-major'' is introduced to ``files''.
device-major <prefix> char <num> [block <num>] [<rules>]
- All device major numbers must be listed up in port dependent majors.<arch>
by using this grammer.
- Added the new naming convention.
The name of the device switch must be <prefix>_[bc]devsw for auto-generation
of device switch tables.
- The backward compatibility of loading block/character device
switch by LKM framework is broken. This is necessary to convert
from block/character device major to device name in runtime and vice versa.
- The restriction to assign device major by LKM is completely removed.
We don't need to reserve LKM entries for dynamic loading of device switch.
- In compile time, device major numbers list is packed into the kernel and
the LKM framework will refer it to assign device major number dynamically.
One basic struct, a function to setup a queue with a specific strategy and
three macros to put buf's into the queue, get and remove the next buf or
get the next buf without removal.
The BUFQ_XXX interface will be removed in the future.
The B_ORDERED flag is not longer supported.
Approved by: Jason R. Thorpe <thorpej@wasabisystems.com>
XS_SELTIMEOUT and XS_TIMEOUT errors- but only do so if the device exists
already.
Devices that are being probed won't be found via periph_lookup, so we can
use that to find if a device exists for the purposes of honoring retries.
deal with such xfers, and can wedge the system with some controllers.
It's a bug to request such xfers for ATAPI, but as the request may come
from userland we have to protect against it.
So check for version 3, not 4 when looking for DT support.
This should be safe as these bits are reserved for older devices, they
should be set to 0 when not supported.
Set this to dv_xname for scsibus and atapibus.
Set the name of the kernel thread to chan_name instead of controller's
name:channel number (so that we can use this name for controller-specific
threads).
all function pointers passed in from the adapter driver.
This partly fixes PR 13480, i.e. the FREECOM CD driver works now in pcmcia
adapters.
The remaining issue (timing problems with slow cards and cardbus bridges)
is probably the cause of several other PRs too.
inserted into comments. I really think that more testing was required,
but Christos was eager.
+ Add in tape block/file position reporting support.
+ Change the prevent/allow ejection code so that if the device
is close the tape can be ejected. This allows robots to eject
the tape even if the tape isn't at BOT.
+ Don't do a null filemark write if we're reading block position. This
was such an abysmal performance killer that it had to go. Assume
that the tape will DTRT and tell you what the tape position really is
including any buffered data. You are depending on the tape to do
the right thing to report position at all, so the risk factors don't
increase appreciably here. BTW- we only do this for logical block
position. For 'hardware' block position, we still flush.
+ Some substantial tweaking in st_interpret_sense. This essentially duplicates
the FreeBSD driver's exception handling code. This is to try and correctly
handle EOM cases. I'm not sure that this is now correct with respect to
the ENABLE EARLY WARNING code- I hadn't gotten around to validating that.
Add in full 32 bit residuals- this can then be available to an update
MTIOCGET in the future.
+ Make sure we handle SKEY_VOLUME_OVERFLOW correctly.
normal case, and in the polling or "no thread yet" cases:
don't return an error from scsipi_complete(), as the error should already have
been handled in scsipi_complete() and eventually periph driver callbacks.
Should fix kern/15190.
deal with shortages of the VM maps where the backing pages are mapped
(usually kmem_map). Try to deal with this:
* Group all information about the backend allocator for a pool in a
separate structure. The pool references this structure, rather than
the individual fields.
* Change the pool_init() API accordingly, and adjust all callers.
* Link all pools using the same backend allocator on a list.
* The backend allocator is responsible for waiting for physical memory
to become available, but will still fail if it cannot callocate KVA
space for the pages. If this happens, carefully drain all pools using
the same backend allocator, so that some KVA space can be freed.
* Change pool_reclaim() to indicate if it actually succeeded in freeing
some pages, and use that information to make draining easier and more
efficient.
* Get rid of PR_URGENT. There was only one use of it, and it could be
dealt with by the caller.
From art@openbsd.org.
terminating zero and uninitialized dada following
-use use the "vendor" field for the name which is used in the default
disklabel, the "product" field is meaningless or not existing for ATAPI
(serial number)
on disks in a generic way. Implement these ioctls for SCSI disks.
This is not fully fleshed-out yet, but it allows people to experiment
with disk caches more easily.
kill ata_atapi_attach. Change atapibus to use a struct scsipi_channel instead
of ata_atapi_attach as attach arch. Create a ata_device, compatible with
scsipi_channel, to attach wd.
not support a value (e.g., it's to be used as "options FOO" instead of
"options FOO=xxx"). options that take a value were converted to
defparam recently.
- minor whitespace & formatting cleanups
as config(8) will warn for value-less defparam options
- minor whitespace/formatting cleanup
- consolidate opt_tcp_recvspace.h and opt_tcp_sendspace.h into opt_tcp_space.h
using the ahc driver hang when probing scsi devices. The problem may be in
the ahc driver and not in this change, but back it out until this has been
fixed anyway.
called via a callout, kick the completion thread to run it for us (uses
a new flag, SCSIPI_CHAN_KICK).
If we've received BUSY status and we haven't started the completion
thread yet, don't freeze do a callout to scsipi_periph_timed_thaw which
then will try and kick the completion thread- instead treat the command
as if it were a polled command and just call delay for 1 second.
If DIAGNOSTIC is defined, and the periph qfreeze count is less than
zero, panic because some HBA has corrupted the periph structure's
accounting.
not present" don't print any message but still return ENODEV.
Use this in cd driver to allow open of character raw partition even if
the drive is empty (older drives fails at LOAD_UNLOAD time, newer
ones fail at TEST_UNIT_READY time).
st0 at atapibus0 drive 1: <Seagate STT8000A, , 5.51> type 1 sequential
removable
Major changes may still happen in order to properly support other ATAPI
tape drives.
Add SD_IO_TIMEOUT (an option in opt_scsi.h) also, which defaults to the
normal 60 * 1000 timeout for normal read/write commamds. This allows you
to shorten or lengthen the timeout as needed.
some devices can't handle tag number larger than some values and always
reject commands with QUEUE FULL if the tag number is larger than this.
Under some circonstances the scsipi system may not decrease periph_openings
(as a workaround of other odd behavior) and we may end up requeuing the command
with a hight tag value again, and the driver could loop on this.
Workaround: in case of queue full, decrease periph_openings to
min(periph_active - 1, periph_openings - 1) so that, after some iteration,
periph_openings is less than the max tag value acceptable by the device.
Solves the problem with tagged queuing on ncr53c9x for me.
This is a completely rewritten scsipi_xfer execution engine, and the
associated changes to HBA drivers. Overview of changes & features:
- All xfers are queued in the mid-layer, rather than doing so in an
ad-hoc fashion in individual adapter drivers.
- Adapter/channel resource management in the mid-layer, avoids even trying
to start running an xfer if the adapter/channel doesn't have the resources.
- Better communication between the mid-layer and the adapters.
- Asynchronous event notification mechanism from adapter to mid-layer and
peripherals.
- Better peripheral queue management: freeze/thaw, sorted requeueing during
recovery, etc.
- Clean separation of peripherals, adapters, and adapter channels (no more
scsipi_link).
- Kernel thread for each scsipi_channel makes error recovery much easier
(no more dealing with interrupt context when recovering from an error).
- Mid-layer support for tagged queueing: commands can have the tag type
set explicitly, tag IDs are allocated in the mid-layer (thus eliminating
the need to use buggy tag ID allocation schemes in many adapter drivers).
- support for QUEUE FULL and CHECK CONDITION status in mid-layer; the command
will be requeued, or a REQUEST SENSE will be sent as appropriate.
Just before the merge syssrc has been tagged with thorpej_scsipi_beforemerge
saves about 2.2MB under /usr/include/dev/. Discussed on tech-kern@
recently.
I HOPE to get the list right. The headers I left in are ones
used for MI tools and those whose usage I discovered by grep over tree sources.
Feel free to put needed includes back in if you encounter anything which
should not be removed from lists.
the number of partitions is > OLDMAXPARTITIONS. This is better
than silently truncating the label (don't want to silently throw
away partitions when using an old disklabel binary on a label with
> 8 partitions). From Enami Tsugutomo.
we have it.
* st_unmount(): reset density to the device default. This prevents using
stale density values after changing to a medium with different density.
Section 9.3.3 of the SCSI specs states that a device shall return the
density value specified in the last succesfull MODE SELECT after an
unload operation, in case it is not able to automatically determine
the density of the new medium.
after all, probing the device for acceptable parameters.
* In st_loadquirks(), copy mode-specific quirks from the quirk table
to `st_softc'; otherwise all such quirks save ST_Q_FORCE_BLKSIZE are ignored.
it when considering whether to attach devices. This is to facilitate
`non-SCSI' RAID controller drivers that want to provide SCSI pass-through
services to the kernel.
soren