CVS log for src/sys/dev/scsipi/st.c

Up to [cvs.NetBSD.org] / src / sys / dev / scsipi

Request diff between arbitrary revisions

Keyword substitution: kv
Default branch: MAIN

fix various typos in comments, mainly immediatly/immediately/,
as well shared and recently fixed typos in OpenBSD code by Jonathan Grey.

availabe -> available in comment.

Sync w/ HEAD.

Restore EOM handling.

Mostly merge changes from HEAD upto 20200411

Merge changes from current as of 20200406

s/transfered/transferred/

in many device attach paths, allocate memory with M_WAITOK instead of M_NOWAIT
and remove code to handle failures that can no longer happen.

Pull up following revision(s) (requested by jnemeth in ticket #1421):

	sys/dev/scsipi/st.c: revision 1.238

Add simple position recovery when positioning to EOM by reading
the position with READ_POSITION.
this allows for

        mt eom
        mt st

to return the correct file position.

Sync with HEAD

Add simple position recovery when positioning to EOM by reading
the position with READ_POSITION.
this allows for
	mt eom
	mt st
to return the correct file position.

Pull up following revision(s) (requested by kardel in ticket #1682):

	sys/dev/scsipi/st.c: revision 1.236 (patch)
	sys/dev/scsipi/st.c: revision 1.237
	sys/dev/scsipi/files.scsipi: revision 1.42

Fix PR kern/53949:
Fix inconsistent/incomplete file mark handling to conform again
to mtio(4) at close(2) time. This was necessary as the PREVENT/ALLOW
bracket was reduced from a whole mount session to cover only the
open(2)/close(2) time on ~2002-03-22. The rationale was to allow
robots and humans to change the media during a mount session.

Unfortunately this lead to file marks being written to potentially other
media at the beginning on drives that used the two file marks as EOM
pattern. In order for that to happen the media had to be removed after
data and at most one file mark had been written before removal.

The mount error message has been clarified and a warning about
potential data/file mark lossage on UNIT ATTENTION
during an active mount session with unfinished file marks has been
added.

While there, fix, but disable the commented SUN compatibility to write
final file marks by opening and immediately closing the device
in O_WRONLY mode. That code has not been working since around 1998.

It can now be enabled with options ST_SUNCOMPAT.

Additionally debug output coverage has been extended.

Correct printing type of b_blkno (int64_t) in st.c

Fixes build with kUBSan on NetBSD/i386.

Fix, but disable the commented SUN compatibility in st.c to write
final file marks by opening and immediately closing the device
in O_WRONLY mode. That code has not been working since around 1998.
It can now be enabled with options ST_SUNCOMPAT.

Pull up following revision(s) (requested by kardel in ticket #1682):

	sys/dev/scsipi/st.c: revision 1.236 (patch)
	sys/dev/scsipi/st.c: revision 1.237
	sys/dev/scsipi/files.scsipi: revision 1.42

Fix PR kern/53949:
Fix inconsistent/incomplete file mark handling to conform again
to mtio(4) at close(2) time. This was necessary as the PREVENT/ALLOW
bracket was reduced from a whole mount session to cover only the
open(2)/close(2) time on ~2002-03-22. The rationale was to allow
robots and humans to change the media during a mount session.

Unfortunately this lead to file marks being written to potentially other
media at the beginning on drives that used the two file marks as EOM
pattern. In order for that to happen the media had to be removed after
data and at most one file mark had been written before removal.

The mount error message has been clarified and a warning about
potential data/file mark lossage on UNIT ATTENTION
during an active mount session with unfinished file marks has been
added.

While there, fix, but disable the commented SUN compatibility to write
final file marks by opening and immediately closing the device
in O_WRONLY mode. That code has not been working since around 1998.

It can now be enabled with options ST_SUNCOMPAT.

Additionally debug output coverage has been extended.

Correct printing type of b_blkno (int64_t) in st.c

Fixes build with kUBSan on NetBSD/i386.

Fix, but disable the commented SUN compatibility in st.c to write
final file marks by opening and immediately closing the device
in O_WRONLY mode. That code has not been working since around 1998.
It can now be enabled with options ST_SUNCOMPAT.

Pull up following revision(s) (requested by kardel in ticket #1682):

	sys/dev/scsipi/st.c: revision 1.236 (patch)
	sys/dev/scsipi/st.c: revision 1.237
	sys/dev/scsipi/files.scsipi: revision 1.42

Fix PR kern/53949:
Fix inconsistent/incomplete file mark handling to conform again
to mtio(4) at close(2) time. This was necessary as the PREVENT/ALLOW
bracket was reduced from a whole mount session to cover only the
open(2)/close(2) time on ~2002-03-22. The rationale was to allow
robots and humans to change the media during a mount session.

Unfortunately this lead to file marks being written to potentially other
media at the beginning on drives that used the two file marks as EOM
pattern. In order for that to happen the media had to be removed after
data and at most one file mark had been written before removal.

The mount error message has been clarified and a warning about
potential data/file mark lossage on UNIT ATTENTION
during an active mount session with unfinished file marks has been
added.

While there, fix, but disable the commented SUN compatibility to write
final file marks by opening and immediately closing the device
in O_WRONLY mode. That code has not been working since around 1998.

It can now be enabled with options ST_SUNCOMPAT.

Additionally debug output coverage has been extended.

Correct printing type of b_blkno (int64_t) in st.c

Fixes build with kUBSan on NetBSD/i386.

Fix, but disable the commented SUN compatibility in st.c to write
final file marks by opening and immediately closing the device
in O_WRONLY mode. That code has not been working since around 1998.
It can now be enabled with options ST_SUNCOMPAT.

Pull up following revision(s) (requested by kardel in ticket #1197):

	sys/dev/scsipi/st.c: revision 1.236
	sys/dev/scsipi/st.c: revision 1.237
	sys/dev/scsipi/files.scsipi: revision 1.42

Fix PR kern/53949:

Fix inconsistent/incomplete file mark handling to conform again
to mtio(4) at close(2) time. This was necessary as the PREVENT/ALLOW
bracket was reduced from a whole mount session to cover only the
open(2)/close(2) time on ~2002-03-22. The rationale was to allow
robots and humans to change the media during a mount session.

Unfortunately this lead to file marks being written to potentially other
media at the beginning on drives that used the two file marks as EOM
pattern. In order for that to happen the media had to be removed after
data and at most one file mark had been written before removal.

The mount error message has been clarified and a warning about
potential data/file mark lossage on UNIT ATTENTION
during an active mount session with unfinished file marks has been
added.

While there, fix, but disable the commented SUN compatibility to write
final file marks by opening and immediately closing the device
in O_WRONLY mode. That code has not been working since around 1998.
It can now be enabled with options ST_SUNCOMPAT.
Additionally debug output coverage has been extended.

 -

Correct printing type of b_blkno (int64_t) in st.c

Fixes build with kUBSan on NetBSD/i386.
  Fix, but disable the commented SUN compatibility in st.c to write
  final file marks by opening and immediately closing the device
  in O_WRONLY mode. That code has not been working since around 1998.
  It can now be enabled with options ST_SUNCOMPAT.

Correct printing type of b_blkno (int64_t) in st.c

Fixes build with kUBSan on NetBSD/i386.

Fix PR kern/53949:

Fix inconsistent/incomplete file mark handling to conform again
to mtio(4) at close(2) time. This was necessary as the PREVENT/ALLOW
bracket was reduced from a whole mount session to cover only the
open(2)/close(2) time on ~2002-03-22. The rationale was to allow
robots and humans to change the media during a mount session.

Unfortunately this lead to file marks being written to potentially other
media at the beginning on drives that used the two file marks as EOM
pattern. In order for that to happen the media had to be removed after
data and at most one file mark had been written before removal.

The mount error message has been clarified and a warning about
potential data/file mark lossage on UNIT ATTENTION
during an active mount session with unfinished file marks has been
added.

While there, fix, but disable the commented SUN compatibility to write
final file marks by opening and immediately closing the device
in O_WRONLY mode. That code has not been working since around 1998.
It can now be enabled with options ST_SUNCOMPAT.

Additionally debug output coverage has been extended.

- add or adjust /* FALLTHROUGH */ where appropriate
- add __unreachable() after functions that can return but won't in
  this case, and thus can't be marked __dead easily

Pull up following revision(s) (requested by mlelstv in ticket #703):
	sys/dev/scsipi/st.c: 1.234
	sys/dev/scsipi/stvar.h: 1.26
Use separate lock to protect internal state and release locks when
calling biodone.

Resolve conflicts between branch and HEAD

Use separate lock to protect internal state and release locks when
calling biodone.

Revert previous commit in st.c in order to unbreak build

There are various build errors like:
/usr/src/sys/dev/scsipi/st.c: In function 'stattach':
/usr/src/sys/dev/scsipi/st.c:398:16: error: 'struct st_softc'
has no member named 'buf_defer'; did you mean 'buf_queue'?
  bufq_alloc(&st->buf_defer, "fcfs", 0);

Original (reverted) commit:
  Use separate lock to protect internal state and release locks when
  calling biodone.

Use separate lock to protect internal state and release locks when
calling biodone.

update from HEAD

Sync with HEAD

Pull up following revision(s) (requested by mlelstv in ticket #53):
	sys/dev/scsipi/atapiconf.c: revision 1.91
	sys/dev/scsipi/cd.c: revision 1.341
	sys/dev/scsipi/scsi_base.c: revision 1.92
	sys/dev/scsipi/scsiconf.c: revision 1.280
	sys/dev/scsipi/scsipi_base.c: revisions 1.176, 1.177
	sys/dev/scsipi/sd.c: revision 1.325
	sys/dev/scsipi/ss.c: revision 1.89
	sys/dev/scsipi/st.c: revision 1.231
The atapibus detach path did hold the channel mutex while calling into autoconf,
which would trigger a panic when unplugging a USB ATAPI CDROM.
Align detach code for scsibus and atapibus to fix this.
Also avoid races when detaching devices by replacing callout_stop with
callout_halt.
--
pass config_detach error to caller.

The atapibus detach path did hold the channel mutex while calling into autoconf,
which would trigger a panic when unplugging a USB ATAPI CDROM.

Align detach code for scsibus and atapibus to fix this.

Also avoid races when detaching devices by replacing callout_stop with
callout_halt.

Sync with HEAD.  (Note that most of these changes are simply $NetBSD$
tag issues.)

Sync with HEAD

Make scsipi framework MPSAFE.

Data structures are now protected by a per-adapter mutex at IPL_BIO
that is created by the scsibus or atapibus instance when the adapter
is configured.
The enable reference counter and the channel freeze counter which are
currently used by HBA code before the adapter is configured, are made
atomic.
The target drivers are now all tagged as D_MPSAFE.

Almost all HBA drivers still require the kernel lock to present,
so all callbacks into HBA code are still protected by kernel lock
unless the driver is tagged as SCSIPI_ADAPT_MPSAFE.

TODO: refactor sd and cd to use dksubr.

Avoid calling bufq_free() from critical code sections.

Sync with HEAD

- Use aprint*() instead of printf() in xxx_attach().
- Add missing aprint_naive("\n");
- KNF

Sync with HEAD

would you like some freshly ground _KERNEL_OPT with that?
yes?  excellent choice, sir/madam.

Rebase to HEAD as of a few days ago.

Merge tls-earlyentropy branch into HEAD.

Rebase.

Add d_discard to all struct cdevsw instances I could find.

All have been set to "nodiscard"; some should get a real implementation.

Add d_discard to all struct bdevsw instances I could find.

I've set them all to nodiscard. Some of them (wd, dk, vnd, ld,
raidframe, maybe cgd) should be implemented for real.

sync with head.

for a reference, the tree before this commit was tagged
as yamt-pagecache-tag8.

this commit was splitted into small chunks to avoid
a limitation of cvs.  ("Protocol error: too many arguments")

sync with head

Be a little more clear and consistent about harvesting entropy from devices:

1) deprecate RND_FLAG_NO_ESTIMATE

2) define RND_FLAG_COLLECT_TIME, RND_FLAG_COLLECT_VALUE

3) define RND_FLAG_ESTIMATE_TIME, RND_FLAG_ESTIMATE_VALUE

4) define RND_FLAG_DEFAULT: RND_FLAG_COLLECT_TIME|
   RND_FLAG_COLLECT_VALUE|RND_FLAG_ESTIMATE_TIME

5) Make entropy harvesting from environmental sensors a little more generic
   and remove it from individual sensor drivers.

6) Remove individual open-coded delta-estimators for values from a few
   places in the tree (uvm, environmental drivers).

7) 0 -> RND_FLAG_DEFAULT, actually gather entropy from various drivers
   that had stubbed out code, other minor cleanups.

Change (mostly mechanically) every cdevsw/bdevsw I can find to use
designated initializers.

I have not built every extant kernel so I have probably broken at
least one build; however I've also found and fixed some wrong
cdevsw/bdevsw entries so even if so I think we come out ahead.

Mark a diagnostic-only variable

sync with head.

sync to latest -current.

Pull up following revision(s) (requested by bouyer in ticket #192):
	sys/dev/scsipi/cd.c: revision 1.307
	sys/dev/scsipi/scsiconf.c: revision 1.266
	sys/dev/scsipi/sd.c: revision 1.298
	sys/dev/scsipi/st_scsi.c: revision 1.35
	sys/dev/scsipi/atapiconf.c: revision 1.85
	sys/dev/scsipi/scsipiconf.h: revision 1.120
	sys/dev/usb/umass_scsipi.c: revision 1.44
	sys/dev/scsipi/scsiconf.h: revision 1.57
	sys/dev/scsipi/st_atapi.c: revision 1.29
	sys/dev/scsipi/scsipi_base.c: revision 1.158
	sys/dev/scsipi/st.c: revision 1.221
	sys/dev/scsipi/scsipi_ioctl.c: revision 1.67
Expand struct scsipi_bustype {} in a ABI-backward-compatible way to
pass more informations about the bus:
- bustype_type has 2 different bytes, one holding the existing
  SCSIPI_BUSTYPE_* (scsi, atapi, ata), and one for a per-SCSIPI_BUSTYPE_*
  subtype. Introduce macros to build or extract bustype_type.
- for SCSIPI_BUSTYPE_SCSI, define subtypes for parallel SCSI, Fibre Channel,
  SAS and USB, to specify the transport method. SCSIPI_BUSTYPE_SCSI_PSCSI
  is 0 so that bustype_type value doesn't change for existing code
- for non-SCSIPI_BUSTYPE_SCSI busses there's no defined subtype yet,
  so the bustype_type value doesn't change.
- provide scsi_fc_bustype, scsi_sas_bustype and scsi_usb_bustype
  along with scsi_bustype to be used by bus driver where appropriate
- scsipi_print_xfer_mode(): more existing code under a
  (SCSIPI_BUSTYPE_SCSI, SCSIPI_BUSTYPE_SCSI_PSCSI) case, as
  sync/wide parameters only make sense for parallel SCSI.
  For (SCSIPI_BUSTYPE_SCSI, SCSIPI_BUSTYPE_SCSI_FC) and
  (SCSIPI_BUSTYPE_SCSI, SCSIPI_BUSTYPE_SCSI_SAS), only print
  tagged queing status if enabled. Just be silent for other
  bustypes.
This change is prompted by this problem:
right now, FC (e.g. isp(4)) and SAS (e.g. mfi(4)) don't
  do anything for ADAPTER_REQ_SET_XFER_MODE, and especially never
  call scsipi_async_event(ASYNC_EVENT_XFER_MODE), so sd(4) always
  runs untagged. Doing a scsipi_async_event(ASYNC_EVENT_XFER_MODE) with
  appropriate parameters is enough to enable tagged queuing,
  but then scsipi will print:
  sd0: async, 8-bit transfers, tagged queueing
  which is harmless (async, 8-bit transfers doens't make sense on SAS anyway)
  but will confuse users. With this change scsipi will only print:
  sd0: tagged queueing
  which is correct.
In the long run, knowning the underlying transport in scsipi will
allow better handling of device which are not parallel SCSI.
Another change adding an extra callback to struct scsipi_bustype {}
will come (so that scsipi_print_xfer_mode(), which is SCSI-specific,
can be moved out of scsipi_base, and split into per-subtype callback),
but this will break kernel ABI and so is not suitable for
netbsd-6, so will be commmited later. The above is enough to get
tagged queuing on FC and SAS in netbsd-6.

Expand struct scsipi_bustype {} in a ABI-backward-compatible way to
pass more informations about the bus:
- bustype_type has 2 different bytes, one holding the existing
  SCSIPI_BUSTYPE_* (scsi, atapi, ata), and one for a per-SCSIPI_BUSTYPE_*
  subtype. Introduce macros to build or extract bustype_type.
- for SCSIPI_BUSTYPE_SCSI, define subtypes for parallel SCSI, Fibre Channel,
  SAS and USB, to specify the transport method. SCSIPI_BUSTYPE_SCSI_PSCSI
  is 0 so that bustype_type value doesn't change for existing code
- for non-SCSIPI_BUSTYPE_SCSI busses there's no defined subtype yet,
  so the bustype_type value doesn't change.
- provide scsi_fc_bustype, scsi_sas_bustype and scsi_usb_bustype
  along with scsi_bustype to be used by bus driver where appropriate
- scsipi_print_xfer_mode(): more existing code under a
  (SCSIPI_BUSTYPE_SCSI, SCSIPI_BUSTYPE_SCSI_PSCSI) case, as
  sync/wide parameters only make sense for parallel SCSI.
  For (SCSIPI_BUSTYPE_SCSI, SCSIPI_BUSTYPE_SCSI_FC) and
  (SCSIPI_BUSTYPE_SCSI, SCSIPI_BUSTYPE_SCSI_SAS), only print
  tagged queing status if enabled. Just be silent for other
  bustypes.

This change is prompted by this problem:
right now, FC (e.g. isp(4)) and SAS (e.g. mfi(4)) don't
  do anything for ADAPTER_REQ_SET_XFER_MODE, and especially never
  call scsipi_async_event(ASYNC_EVENT_XFER_MODE), so sd(4) always
  runs untagged. Doing a scsipi_async_event(ASYNC_EVENT_XFER_MODE) with
  appropriate parameters is enough to enable tagged queuing,
  but then scsipi will print:
  sd0: async, 8-bit transfers, tagged queueing
  which is harmless (async, 8-bit transfers doens't make sense on SAS anyway)
  but will confuse users. With this change scsipi will only print:
  sd0: tagged queueing
  which is correct.

In the long run, knowning the underlying transport in scsipi will
allow better handling of device which are not parallel SCSI.

Another change adding an extra callback to struct scsipi_bustype {}
will come (so that scsipi_print_xfer_mode(), which is SCSI-specific,
can be moved out of scsipi_base, and split into per-subtype callback),
but this will break kernel ABI and so is not suitable for
netbsd-6, so will be commmited later. The above is enough to get
tagged queuing on FC and SAS in netbsd-6.

sync with head

sync to -current

sync to -current

sync to latest -current.

Pull up following revision(s) (requested by mbalmer in ticket #64):
	sys/dev/scsipi/stvar.h: revision 1.24
	sys/dev/scsipi/st_scsi.c: revision 1.34
	sys/dev/scsipi/st_atapi.c: revision 1.28
	sys/dev/scsipi/st.c: revision 1.220
Convert st(4) to device_t, while here clean up the code and use uintXX_t
instead of u_intXX_t.

Convert st(4) to device_t, while here clean up the code and use uintXX_t
instead of u_intXX_t.

Replace magic value 0x7 with constant MT_ISAR.

OK by wiz@

merge to -current.

Entropy-pool implementation move and cleanup.

1) Move core entropy-pool code and source/sink/sample management code
   to sys/kern from sys/dev.

2) Remove use of NRND as test for presence of entropy-pool code throughout
   source tree.

3) Remove use of RND_ENABLED in device drivers as microoptimization to
   avoid expensive operations on disabled entropy sources; make the
   rnd_add calls do this directly so all callers benefit.

4) Fix bug in recent rnd_add_data()/rnd_add_uint32() changes that might
   have lead to slight entropy overestimation for some sources.

5) Add new source types for environmental sensors, power sensors, VM
   system events, and skew between clocks, with a sample implementation
   for each.

ok releng to go in before the branch due to the difficulty of later
pullup (widespread #ifdef removal and moved files).  Tested with release
builds on amd64 and evbarm and live testing on amd64.

Sync with HEAD.

sync with head.

sync with head

Extract SCSIVERBOSE into a kernel module.  The module can be builtin
by defining 'options SCSIVERBOSE' in the kernel config file (no change
from current behavior), or it can be loaded at boot time on those
architectures that support the boot loader's "load" command.

The module is built for all architectures, whether or not SCSI or
atapi support exists.

sync with head

Delete do-nothing device-activation hooks.

Convert tsleep(&lbolt) to kpause().  Make ltsleep/mtsleep on lbolt
illegal.  I examined all places where lbolt is referenced to make
sure there were pointer aliases of it passed to tsleep, but put a
KASSERT in m/ltsleep() just to be sure.

Remove some unecessary includes sys/user.h header.

Remove uarea swap-out functionality:

- Addresses the issue described in PR/38828.
- Some simplification in threading and sleepq subsystems.
- Eliminates pmap_collect() and, as a side note, allows pmap optimisations.
- Eliminates XS_CTL_DATA_ONSTACK in scsipi code.
- Avoids few scans on LWP list and thus potentially long holds of proc_lock.
- Cuts ~1.5k lines of code.  Reduces amd64 kernel size by ~4k.
- Removes __SWAP_BROKEN cases.

Tested on x86, mips, acorn32 (thanks <mpumford>) and partly tested on
acorn26 (thanks to <bjh21>).

Discussed on <tech-kern>, reviewed by <ad>.

sync with head.

1. Move the mode_select functionality into common code (in st.c) and
   invoke the common routine for both scsi and atapi tapes.

2. Replace a numeric constant with some sizeof's when calculating the
   size of the mode_select command buffer, clear the entire buffer, and
   KASSERT to ensure the page_0_size loaded from quirk table is valid.

3. Add a quirk for my Seagate Travan-40 tape drive.

As discussed on tech-kern@

Addresses my PR kern/34832

sync with head

Sync with HEAD.

Commit is split, to avoid a "too many arguments" protocol error.

struct device * -> device_t, no functional changes intended.

sync with head.

Sync with HEAD.

Sync with HEAD.

g/c BUFQ_FOO() macros and use bufq_foo() directly.

make this compile

Update haad-dm branch to haad-dm-base2.

Pull up following revision(s) (requested by bouyer in ticket #78):
	sys/dev/scsipi/st.c: revision 1.208
If we return an error make sure we don't return a b_resid of 0; or this
will trigger a KASSERT in physio_done(). Fix issue reported by Todd Kover
on tech-kern@

If we return an error make sure we don't return a b_resid of 0; or this
will trigger a KASSERT in physio_done(). Fix issue reported by Todd Kover
on tech-kern@

Sync with HEAD.

Sync with HEAD.

Sync with wrstuden-revivesa-base-2.

Reword some misleading code.
ok bouyer@

fix typo in comment

Sync with HEAD.

Sync w/ -current. 34 merge conflicts to follow.

sync with head.

Use device_lookup_private() rather than using cd_devs[] directly to get softc.

XXX maybe we should change a type of cd_devs[] in struct cfdriver
    from (void *) to device_t.

Sync with HEAD.

sync with head.

sync with head.

Remove clause 3 and 4 from TNF licenses

- add "file-system DEVFS" and "pseudo-device devfsctl" to conf/std seeing
  as these are always needed.

- convert many, many drivers over to the New Devfs World Order. For a
  list of device drivers yet to be converted see,
  http://www.netbsd.org/~mjf/devfs-todo.html.

- add a new device_unregister_all(device_t) function to remove all device
  names associated with a device_t, which saves us having to construct
  device names when the driver is detached.

- add a DEV_AUDIO type for devices.

use aprint_*_dev and device_xname

Catch up to netbsd-4.0 release.

Pull up following revision(s) (requested by bouyer in ticket #1880):
	sys/dev/scsipi/st.c: revision 1.199-1.201 via patch
Properly set b_resid in an error case.
Clamp b_resid to b_bcount in case the info field is larger. Fix a KASSERT
in physio() when a media error occurs on my SDLT320 drive (maybe this drive
is bogus for not setting the highter bits to 0 in the INFO field in this
case).
When checking for invalid b_resid valyes, also check negative ones.
Should fix kern/36690.
Move check for b_resid value to the right place. Should definitively fix
kern/36690.

Pull up following revision(s) (requested by bouyer in ticket #1002):
	sys/dev/scsipi/st.c: revision 1.199 (patch)
	sys/dev/scsipi/st.c: revision 1.200 (patch)
	sys/dev/scsipi/st.c: revision 1.201 (patch)
Properly set b_resid in an error case.
Clamp b_resid to b_bcount in case the info field is larger. Fix a KASSERT
in physio() when a media error occurs on my SDLT320 drive (maybe this drive
is bogus for not setting the highter bits to 0 in the INFO field in this
case).
When checking for invalid b_resid valyes, also check negative ones.
Should fix kern/36690.
Move check for b_resid value to the right place. Should definitively fix
kern/36690.

sync with HEAD

sync with head.

Sync with HEAD.

Follow the merge of pmap.c on i386 and amd64 and move
pmap_init_tmp_pgtbl into arch/x86/x86/pmap.c. Modify the ACPI wakeup
code to restore CR4 before jumping back into kernel space as the large
page option might cover that.

sync with head.

Sync with head.

PR/37108: Pauly Goyette: Compute the timeout value, before immediate is
changed for atapi tape drives.

Sync with head.

Sync with head.

Sync with HEAD.

sync with head.

Move check for b_resid value to the right place. Should definitively fix
kern/36690.

Sync with HEAD.

When checking for invalid b_resid valyes, also check negative ones.
Should fix kern/36690.

Properly set b_resid in an error case.
Clamp b_resid to b_bcount in case the info field is larger. Fix a KASSERT
in physio() when a media error occurs on my SDLT320 drive (maybe this drive
is bogus for not setting the highter bits to 0 in the INFO field in this
case).

Pull up following revision(s) (requested by bouyer in ticket #1837):
	sys/dev/scsipi/st.c: revision 1.180
revert the only part of rev. 1.177 which made a functional
change -- it broke error reporting because st->asc(q) are
not set
(actually, I believe that SSD_RCODE_VALID is misnamed)

sync with head.

- Back out the biodone() changes.
- Eliminate B_ERROR (from HEAD).

Sync with HEAD.

It's not a good idea for device drivers to modify b_flags, as they don't
need to understand the locking around that field. Instead of setting
B_ERROR, set b_error instead. b_error is 'owned' by whoever completes
the I/O request.

file st.c was added on branch matt-mips64 on 2007-07-29 12:50:24 +0000

It's not a good idea for device drivers to modify b_flags, as they don't
need to understand the locking around that field. Instead of setting
B_ERROR, set b_error instead. b_error is 'owned' by whoever completes
the I/O request.

Sync with head.

Sync with head.

Merge some of the less invasive changes from the vmlocking branch:

- kthread, callout, devsw API changes
- select()/poll() improvements
- miscellaneous MT safety improvements

Adapt to callout API change.

- Pass the error number and residual count to biodone(), and let it handle
  setting error indicators. Prepare to eliminate B_ERROR.
- Add a flag argument to brelse() to be set into the buf's flags, instead
  of doing it directly. Typically used to set B_INVAL.
- Add a "struct cpu_info *" argument to kthread_create(), to be used to
  create bound threads. Change "bool mpsafe" to "int flags".
- Allow exit of LWPs in the IDL state when (l != curlwp).
- More locking fixes & conversion to the new API.

Sync with HEAD.

Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

TRUE -> true, FALSE -> false

sync with head.

sync with head.

Sync with head.

__unused removal on arguments; approved by core.

sync with head

- sprinkle __unused on function decls.
- fix a couple of unused bugs
- no more -Wno-unused for i386

sync with head

sync with head.

Change iostat_alloc() to take the parent pointer and the name directly, so
that callers are not responsible for initializing the fields. Store the name
inside the struct instead of maintaining a pointer to external storage, or
leaked memory (nfs case).

sync with head.

sync with head.

Sync with head.

merge FreeBSD timecounters from branch simonb-timecounters
- struct timeval time is gone
  time.tv_sec -> time_second
- struct timeval mono_time is gone
  mono_time.tv_sec -> time_uptime
- access to time via
	{get,}{micro,nano,bin}time()
	get* versions are fast but less precise
- support NTP nanokernel implementation (NTP API 4)
- further reading:
  Timecounter Paper: http://phk.freebsd.dk/pubs/timecounter.pdf
  NTP Nanokernel: http://www.eecis.udel.edu/~mills/ntp/html/kern.html

Merge 2006-05-24 NetBSD-current into the "peter-altq" branch.

sync with head.

sync with head

Sync with head.

Prefix iostat structure elements with io_

sync with head.

Make i/o statistics collection more generic, include tape drives and
nfs mounts in the set of devices that statistics will be reported on.

sync with head.

Merge 2006-03-31 NetBSD-current into the "peter-altq" branch.

Use device_private().

Use device_unit().

Adapt for timecounters: mostly use get*time() and use "time_second"
instead of "time.tv_sec".

merge ktrace-lwp.

Sync with HEAD. Here we go again...

- change the way to specify a bufq strategy.  (by string rather than by number)
- rather than embedding bufq_state in driver softc,
  have a pointer to the former.
- move bufq related functions from kern/subr_disk.c to kern/subr_bufq.c.
- rename method to strategy for consistency.
- move some definitions which don't need to be exposed to the rest of kernel
  from sys/bufq.h to sys/bufq_impl.h.
  (is it better to move it to kern/ or somewhere?)
- fix some obvious breakage in dev/qbus/ts.c.  (not tested)

Split out stats attach code ready for shifting
Add sysctl hooks here for the time being.

Gather statistics for tape drives.

change output from "rogue" to "quirks apply" - resolves pr#25387

- Sprinkle const
- Avoid variable shadowing.
- Eliminate some caddr_t abuse.

sync with -current

revert the only part of rev. 1.177 which made a functional
change -- it broke error reporting because st->asc(q) are
not set
(actually, I believe that SSD_RCODE_VALID is misnamed)

Pull up revision 1.179 (requested by yamt in ticket #112):
introduce a function to drain bufq and use it where appropriate.

Sync with HEAD.

introduce a function to drain bufq and use it where appropriate.

sync with head.  xen and whitespace.  xen part is not finished.

Sync with HEAD.

Hi Perry!

nuke trailing whitespace

Part 1 of a cleanup pass over the SCSI subsystem.  The aim is to name
everything "scsi_*", since we really are talking about the SCSI command
set, ATAPI transport not withstanding.  Improve the names of many structures,
and prepend "SCSI_" onto all SCSI command opcodes.  Place items described
by the SCSI Primary Commands document into scsi_spc.h.

Backing out changes to clean up scsipi. I was pointed out there were
problems i hadn't seen. To prevent lossage i'd decided to back off all
changes and let them be reviewed on tech-kern.

Part of the cleanup of sys/scsipi's use of types; rename all u_int* to
uint* and change the u_long's to uint32_t's where possible. Note that the
iocl definitions/hooks have to be ulong (or u_long) or they'll bomb out.

As part of cleaning up sys/scsipi, replace all u_char by uint8_t and
replace all `short' with int16_t.

Sync with HEAD.

move buffer queue related stuffs from buf.h to their own header, bufq.h.

Sync with HEAD

Fix debug message output args to match yamt's src/sys/sys/buf.h changes.

Fix the sync with head I botched.

Sync with HEAD.

Minor rearrangement.  Whitespace and #include cleanup.

Standardize some variable names and the calling pattern for scsipi_command().
Use void pointer casts.

Remove the "xfer" argument to scsipi_command().

In places where we've already called scsipi_make_xs(), call scsipi_execute_xs()
directly rather than going through scsipi_command().

Do not manipulate xs->bp in "generic" code -- do it only in the psw_done
routine.  As part of this, pass down our pre-parsed error code -- though this
interface will probably change later to accomodate better error handling.

Pull up revisions 1.165-1.166 (via patch, requested by bouyer in ticket #837):
  Improve handling of memory shortage, to fix problems like:
    sd3(mpt0:0:1:0): unable to allocate scsipi_xfer
    sd3: not queued, error 12
  The theory is that other consumers of pool memory is causing
  this memory shortage in certain somewhat hard to reproduce
  situations.
  This is done by giving scsipi_command an extra argument to
  optionally pass a preallocated scsipi_xfer, and allocating a
  scsipi_xfer before dequeueing a buffer in the various *start()
  functions.  If the allocation of a scsipi_xfer fails, schedule
  a callout for delayed invocation of the start function.  Also
  reserve one page for scsipi_xfer structs, to ensure that we will
  eventually have some available once pending commands complete.
  Should fix PR#25670.

Make the xxstart() functions reentrant again, as some drivers HBA can call
scsipi_done() from their scsipi_request().
For this, add a struct scsipi_xfer * argument to scsipi_command().
If not NULL scsipi_command() will use this to enqueue this xfer, otherwise
it'll try to allocate a new one. This scsipi_xfer has to be allocated
and initialised by scsipi_make_xs() or equivalent.
In xxstart(), allocate a scsipi_xfer using scsipi_make_xs(), and if not NULL,
dequeue the buffer before calling scsipi_command(). This makes sure that
scsipi_command() will not fail, and also makes sure that xxstart() won't
be called again between the BUFQ_PEEK() and BUFQ_GET().

Fix "dequeued wrong buf" panics reported by Juergen Hannken-Illjes in
private mail and Andreas Wrede on current-users@.
Thanks to Jason Thorpe and Chuck Silver for review, and Andreas Wrede for
testing the patch.

Sync with HEAD

Improve handling of memory shortage, to fix problems like:
sd3(mpt0:0:1:0): unable to allocate scsipi_xfer
sd3: not queued, error 12
Havard Eidnes's analysis of this problem is that the scsipi_xfer pool is
competing for resources with other pools, including the the inode and vnode
pools which can grow quite large.

*_scsipi_cmd(): don't biodone the buffer if scsipi_make_xs() fails, let the
   caller deal with the problem
start function of block devices drivers: dequeue the buffer after the
   scsipi_command() call. If scsipi_command() fails with ENOMEM don't dequeue
   the buffer, and schedule a callout to call the start function after
   some delay.
scsipi_init(): prime the scsipi_xfer_pool with one page. This ensure that
   there is always some scsipi_xfer to play with. If scsipi_command() fails
   because of pool_get(), we're sure there will be resources available later,
   when the pending commands have completed.

Reviewed by Jason Thorpe and Havard Eidnes.
Todo: remove the "unable to allocate scsipi_xfer" and "not queued, error %d"
printfs, but I choose to keep them for now, to help make sure the code does
what it should.

Sync with HEAD.

Use ANSI function decls and make use of static.

Apply the aborted ktrace-lwp changes to a specific branch.  This is just for
others to review, I'm concerned that patch fuziness may have resulted in some
errant code being generated but I'll look at that later by comparing the diff
from the base to the branch with the file I attempt to apply to it.  This will,
at the very least, put the changes in a better context for others to review
them and attempt to tinker with removing passing of 'struct lwp' through
the kernel.

Back out the lwp/ktrace changes. They contained a lot of colateral damage,
and need to be examined and discussed more.

Pass lwp pointers throughtout the kernel, as required, so that the lwpid can
be inserted into ktrace records.  The general change has been to replace
"struct proc *" with "struct lwp *" in various function prototypes, pass
the lwp through and use l_proc to get the process pointer when needed.

Bump the kernel rev up to 1.6V

Add a quirk for the Tandberg SLR/5
Fix supplied by Rex McMaster in PR kern/13603

use PRId64 to printf bp->b_blkno, which is of type daddr_t

Test callout_pending(), not callout_active(), and eliminate now-unnecessary
callout_deactivate() calls.

Catch up to -current

merge kqueue branch into -current

kqueue provides a stateful and efficient event notification framework
currently supported events include socket, file, directory, fifo,
pipe, tty and device changes, and monitoring of processes and signals

kqueue is supported by all writable filesystems in NetBSD tree
(with exception of Coda) and all device drivers supporting poll(2)

based on work done by Jonathan Lemon for FreeBSD
initial NetBSD port done by Luke Mewburn and Jason Thorpe

sync kqueue with -current; this includes merge of gehenna-devsw branch,
merge of i386 MP branch, and part of autoconf rototil work

Catch up to -current.

Merge the gehenna-devsw branch into the trunk.

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.

sync kqueue branch with HEAD

catch up with -current.

Catch up to -current.

Convert to new device buffer queue interface.

catch up with -current on kqueue branch

Catch up to -current.

Add the block/character device switches.
Replace the direct-access to devsw table with calling devsw API.

If periph->periph_callout is already active, don't freeze the periph again:
scispi_periph_timed_thaw() will be called only one time anyway.

Back out previous. It has issues with multiple dumps to one tape using
/dev/nrstx, as pointed out by Matthew Jacob.
My problem is probably related to mt using /dev/nrst0 instead of /dev/enrst0
by default.

If we get a Unit Attention Not Ready To Ready Transition (medium may have
changed) sense, and the periph was not open, then ignore the error.

Catch up to -current.
(CVS: It's not just a program. It's an adventure!)

kern/16014- if we do an 'mt offline', make sure we've allowed the tape
to be ejected (PR_ALLOW). This got nuked in a previous change.

Forced commit so that some more detail on the previous patches can be
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.

Add the ability to report file number/block number. From Matt Jacob.

Catch up to -current.

Sync w/ -current.

For fixed block drive, for invalid sense error code, set info to
xs->datalen / st->blksize instead of xs->datalen; as code assume later
that info is a block number.
Should fix kern/2727.

Sync kqueue branch with -current.

Catch up to -current.

add detach support for st.

Hum, no need to print a message each time we're waiting for the drive.

Various quirks for the ATAPI OnStream DI-30, mostly from the FreeBSD driver.
Many thanks to Chris Pinnock for giving me remote access to his hardware.

don't need <sys/types.h> when including <sys/param.h>

Catch up to -current.

add RCSIDs

* add a VCLONED vnode flag that indicates a vnode representing a cloned
  device.
* rename REVOKEALL to REVOKEALIAS, and add a REVOKECLONE flag, to pass
  to VOP_REVOKE
* the revoke system call will revoke all aliases, as before, but not the
  clones
* vdevgone is called when detaching a device, so make it use REVOKECLONE
  to get rid of all clones as well
* clean up all uses of VOP_OPEN wrt. locking.
* add a few VOPS to spec_vnops that need to do something when it's a
  clone vnode (access and getattr)
* add a copy of the vnode vattr structure of the original 'master' vnode
  to the specinfo of a cloned vnode. could possibly redirect getattr to
  the 'master' vnode, but this has issues with revoke
* add a vdev_reassignvp function that disassociates a vnode from its
  original device, and reassociates it with the specified dev_t. to be
  used by cloning devices only, in case a new minor is allocated.
* change all direct references in drivers to v_devcookie and v_rdev
  to vdev_privdata(vp) and vdev_rdev(vp). for diagnostic purposes
  when debugging race conditions that still exist wrt. locking and
  revoking vnodes.
* make the locking state of a vnode consistent when passed to
  d_open and d_close (unlocked). locked would be better, but has
  some deadlock issues

Commit my "devvp" changes to the thorpej-devvp branch.  This
replaces the use of dev_t in most places with a struct vnode *.

This will form the basic infrastructure for real cloning device
support (besides being architecurally cleaner -- it'll be good
to get away from using numbers to represent objects).

Catch up with -current.

update to -current

bzero -> memset

Correct various misspellings of 'transfer' and inflected forms.

Catch up to -current.

Snapshot of ATAPI tapes support. Known to be able to read/write to tape with:
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.

uninitialised variable (from Krister Walfridsson):
in st_cmprss(), init flags to 0 (never changed, but this should change soon
anyway, for ATAPI tapes support)

delint; use MAX(sizeof(..),sizeof(..)) instead of max(...) for array size

Use SCSI/ATAPI common definition for MODE_{SELECT,SENSE}{,_BIG}. Define
functions to send theses commands in scsipi_base.c and use them instead
of ad-hoc commands setups.

Fix a typo from thorpej_scsipi merge. No-sense information with retval == 0
should only print if SCSIPI_DEBUG is defined.

Add an ATAPI front-end to the st driver. Completely untested for now,
but st at scsi should still work :)

Pull up the thorpej_scsipi branch to main branch.
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

Make this compile for the non-SCSIVERBOSE case.

Sync with HEAD.

constify

Sync with HEAD.

Sync with HEAD.

Remove obsolete comment.

Update thorpej_scsipi to -current as of a month ago
A i386 GENERIC kernel compiles without the siop, ahc and bha drivers
(will be updated later). i386 IDE/ATAPI and ncr work, as well as
sparc/esp_sbus. alpha should work as well (untested yet).
siop, ahc and bha will be updated once I've updated the branch to current
-current, as well as machine-dependant code.

Main changes to the scsipi code itself:
- add a scsipi_channel->type to allow umass to attach to both atapibus and
  scsibus. Will die when IDE is converted from ata_atapi_attach to
  scsipi_channel/scsipi_adapter
- Add a chan_defquirks to scsipi_channel so that adapters can pass a default
  set of quirks to be set for each device attached
- add adapt_getgeom and adapt_accesschk callbacks

Pullup 1.127 [pk]:
Remove useless check for SDEV_MEDIA_LOADED from st_read_block_limits().
This command should work whether or not media is present in the device.

st_touch_tape(): Pass XS_CTL_SILENT to st_mode_select().

* st_touch_tape(): start probing at the block size from the sense data if
  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.

* Per st(4), retrieving status and setting modes on the control device
  should succeed even if no media is loaded.

* In stopen(), check the return value of st_mount_tape().

Introduce ST_Q_ERASE_NOIMM, a quirk indicating that the device rejects
an ERASE command with the `Immed' bit on.

Use it on the VIPER 21247 & 21531.

Prevent printing sense information twice.

Remove useless check for SDEV_MEDIA_LOADED from st_read_block_limits().
This command should work whether or not media is present in the device.

* In st_touch_tape(), don't bail out if the MODE SELECT fails since we are,
  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.

Add a NOPREVENT quirk which prevents the sending of PREVENT messages (some
manual 9track tapes don't support it).  Add a quirk entry for the NCR H621
9track tape drive.

Sync w/ netbsd-1-5-base.

Prevent a process being swapped out during I/O if the data buffer is
allocated on stack.  This potential problem is noticed by Noriyuki Soda
and the idea and sample code to fix is given by Jason R. Thorpe.

Density codes are usually given in decimal, so print them that way.

Add a quirk table entry for the OnStream ADR50 Drive;
from S.P.Zeidler <spz@serpens.swb.de> in kern/10118.

Get rid of register declarations.

Patches from msouth@scruz.net to handle QIC 3220 (HP T20).

minor spelling change

Pull up revision 1.118 (requested by mjacob):
  Recognize (indirectly) HP4000s via density code and do the right
  QIC type dance.  Fixes PR#9271.

PR/9271 (from srp@zgi.com)- recognize (indirectly) HP4000s via density
code and do the right QIC type dance (1 FM @EOT, fixed block size).

Update for sys/buf.h/disksort_*() changes.

Add tweaks for TEAC compact cassette tape drive.

Check in the implementation of the ST_MOUNT_DELAY option.

This is an attempt to allow people to change the default configuration
to try harder at 'mounting' a tape. This allows you to specify, in
seconds, the amount of time a non-control unit open will retry
(once per second) the scsipi_test_unit_ready when it tries to mount
the tape. It also turns off the over-verbose error reporting at
this time unless SCSIDEBUG is set.

The reason this is not enabled as a default is that it's a large change
of behaviour. I find it useful to 'try harder' at mounting a tape in
the tape driver, particularly when loaded via a media changer device
rather than specifying the delays in the backup program.

Initial commit of recent changes to make DEV_BSIZE go away.

Runs on i386, needs work on other arch's. Main kernel routines should be
fine, but a number of the stand programs need help.

cd, fd, ccd, wd, and sd have been updated. sd has been tested with non-512
byte block devices. vnd, raidframe, and lfs need work.

Non 2**n block support is automatic for LKM's and conditional for kernels
on "options NON_PO2_BLOCKS".

Fixup the SC_DEBUG() stuff for the new world order.

Remove an unnecessary comment regarding XS_CTL_NOSLEEP.

Completely rewritten scsipi_xfer execution engine:
- 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).

There is a lot more work to do, but this correctly functions for the most
part on several file servers I run.

Cleanup the scsipi_xfer flags:
- `flags' is now gone, replaced with `xs_control' and `xs_status'.
- Massive cleanup of the control flags.  Now we explicitly say that
  a job is to complete asynchronously, rather than relying on side-effects,
  and use a new flag to now that device discovery is being performed.
- Do SCSI device discovery interrupt-driven.

Fix tyop in a comment.

Sync w/ -current.

STK 9490 && SD-3 drives incorrectly quirked as not supporting the LOAD command.
Anyway, just because a drive doesn't support the LOAD (to BOT) command does
not mean that the drive doesn't support the UNLOAD command. Also note and
print errors in rewinds and unloads (and errors in writing closing filemarks
for same).

If scsipi_command() fails, always print out the error code.

Update to slightly altered rnd_attach_source() api

Abort transfer if b_blkno is negative. Closes PR kern/5553 by Johan Danielsson.

Make MTIOCRDSPOS, MTIOCSLOCATE, etc. work with write protected tapes.
Patch supplied by Dave Huang in PR kern/5305.

When closing, wait for pending xfers to drain before deleting the reference
to the adapter.

Add adapter reference counting for SCSI and ATAPI devices.

Rename scsi_interpret_sense() to scsipi_interpret_sense() and move it from
scsi_base.c to scsipi_base.c. Rename the functions from scsi_verbose.c
too, and rename the file itself. Cleaup includes too (scsi_*.h should not
be #included in scsipi_*.h files, which are supposed to be
common to atapi and scsi).

pull up rev 1.98 (via patch; doesn't pull up cleanly) from trunk (drochner)

keren/6128: add an entry for the TDC 4200. Full density code set isn't known.

typo for non-SCSIVERBOSE case

kill the last remnants of __BROKEN_INDIRECT_CONFIG.  (only the pica port
used it, and it's non-working and apparently slated for replacement.)

Assign my copyrights to TNF.

Make copyright notices with my name consistent.

Responding to an issue brought to my attention- when the device is
opened norewind and 2 filemarks are written at the end a phantom file
is left (just what I was afraid of, but I didn't think about it in
the last delta because somehow I had managed to convince myself that
this was a nonissue. It's not.).

So- in stdone clear ST_WRITTEN for regular reads. In st_close, preserve
the state of ST_WRITTEN, and if no error and 2FM@EOD for this device and
this is a no-rewind open, backspace one filemark. This should preserve
(for this mount session) FILE - FMK - FILE - FMK - FILE ... FILE FMK FMK EOD
sequencing.

This doesn't clean up the case of EOM appends- in this case you *will* still
get (after an MTEOM operation and a write of a file) a phantom empty file,
e.g. FILE - FMK FMK - FILE - FMK FMK EOD *unless* you follow the EOM operation
with an explicit backspace. The trouble is that this makes it difficult for
seamless interchange with other systems which don't necessarily follow.

The preferrable alternative would be to eliminate the 2FM@EOD except for
1/2" Reel tapes, but that has been pretty much nixed within developers.

Revert cdevsw mmap routines to return int.

fix incorrect length of LOCATE CDB (reported in PR kern/5306 by
Dave Huang <khym@bga.com>)

Suggestion from Matthias Drochner: If at close you decide to write
filemark 'coz you opened write only and didn't do anything else,
call st_check_eod to possibly write TWO furshlugginer filemarks.

Also- return any errors from writing filemarks out of stclose.

Several more changes. First of all, move CTRL_MODE to have I/O behaviour
like a no-rewind device. Secondly figure out whether the initial TUR
for a CTRL_MODE open resulted in a tape being actually found (if so,
then do a mount session).

Move the 'sun compatibility' behaviour into stdone && stclose- don't
mark a tape as having been written in stopenm, fer gosh sakes.

Some minor comment tweaking.

Also- to be fair and on review, kern/391 isn't really addressed by
the previous commits. In reviewing, I'm embarassed to find that this
talks about reading at EOT. I'm actually going to claim that this
is 'not a bug' or 'fixed already' in that at the end of media (at the
edge of recorded media), you may continuously open the tape (should
you choose to) issue a read, and zero bytes will transfer- this is a
sufficient EOF indicator.

Clarify and name some of the 'open' modes. Clarify a few comments. Remove
a now unused variable. Also, remove the restriction against at density
code being greater than the max SCSI 2 density code: 0x80..0xff are the
Vendor Unique codes and most certainly should be allowed. The check for
invalid values should be less than 0 or greater than 255.

Oh- yeah, the previous commit addressed kern/391.

file st.c was added on branch eeh-paddr_t on 1998-08-08 03:06:52 +0000

Make some changes wrt EOM behaviour. Distinguish EIO_PENDING from
EOM_PENDING. Set up a persistent EARLYWARNING behaviour flag. If
set, EOM behaviour forces a 'short read' to signal logical (as
opposed to physical) end of media. The user application may, of
course, do with this information what it will.

The EARLYWARNING behaviour may be enabled/disabled by a MTIOCTOP
operation. The default action is to not have EARLYWARNING enabled-
but this may be reversed by an option ST_ENABLE_EARLYWARN in
the kernel build.

Remove a check which restricted raw SCSI commands to the "minor 3"
("CTLMODE") subdevice. There are legitimate uses for raw commands with
normal tape handles too.
[I'm not sure if this is a final solution. Administrators might want
to set up a more finegrained policy. However, this should not be mixed
with the "set defaults" semantics of the "CTLMODE" subdevice; another
flag should be used instead (eg execute permission or a minor number bit).]

part of fix for kern/3835: use of enumerated returns from target sense handlers

Minor enhancements:

	1) Quirk entries for Storage Tek 9490 (Timberline) and D3 (Redwood)
	drives.

	2) Modification to st_loadtape to do a REWIND to BOT if the
	action is a load and the tape doesn't support the LOAD command
	(9490, SD3, and IBM 3590).

	3) Cleaned up the 'undersized user record' error message to
	make a little more sense.

Various bug fixes:

kern/1275:	Now returns values in dsreg and erreg and sets resid
		(as best as it can for a 16 but integer). See also
		a recent change to mtio.h. We are declining to fix
		the portion of this bug about naming a more specific
		SCSI device. Since there is nothing programmatic
		you can do with that information, it is not useful
		to pass back at this time.

		A side effect of this change is that doing MTIOCGET
		also forces a mode sense (to get the current state
		of WRITE PROTECT).


kern/5647:	Now no longer logs to the console ILI or Filemark or (first)
		EOM (on write) errors (unless SCSIDEBUG is set).

kern/5525:	Substantially increased timeouts for a variety of
		operations, and split them into categories of
		I/O, Space, and Control operations (each have
		likely different inherent times). I/O is for
		reads/writes. Control is for mode sense/select.
		Space is for spacing the tape.

Until EOM handling is changed, though kern/391 is still not fixed. A side
effect of EOM handling is that you now always 'lose' (to the writing
application's view) the last write since EIO is what is returned on
EOM detection during writes. Hopefully the reader applications don't
get too bent out of shape by this.

Don't include <dev/scsipi/scsi_all.h> twice.

* Add the "VIPER 150/21531" to quirk list (ST_Q_SENSE_HELP).
* Double timeout on tape position commands to 30 minutes. Some units
  seem capable of taking that much time.

Adjust for changes to config.

Added ST_Q_SENSE_HELP to the Archive Viper 150S quirks so that
density 0 (autosense) actually works.

Pull rev 1.85 up from trunk (mjacob)

If we're in the middle of opening, don't let st_interpret_sense get
into the act and return EIO or whatever when we're just eating the
initial TEST UNIT READY induced check condition.

Implement two macros, scsipi_command() and scsipi_command_direct(), and
use them to hide the structure of the function pointers we jump through
to issue a command.

Define FALSE and TRUE locally.

Update marc-pcmcia branch from trunk.

o Make usage of /dev/random dependant on
  pseudo-device   rnd                     # /dev/random and in-kernel generator
  in config files.

o Add declaration to all architectures.

o Clean up copyright message in rnd.c, rnd.h, and rndpool.c to include
  that this code is derived in part from Ted Tyso's linux code.

Hello? If we're doing block positioning a timeout of greater than 5 seconds
is probably going to be necessary.

Add hooks to insert timing info into the random system

Cosmetic changes;

- dereference a pointer to function explicitly.
- fold long line to fit columns < 80.
- put whitespaces around a binary operator.
- don't put a single statement into a block.

A) At least IBM 3590 tape drives return a NOT READY error if issued a LOAD
to BOT command- even if at BOT. Urk. B) Make READ POSITION SCSI_SILENT.

Many thanks to Wolfgang Rupprecht for spotting this... In order to be sure
about actual position when reading tape position, you should flush any
pending writes. Well, if the tape is write protected, some drives don't
see the zero count WRITE FILE MARK command as a no-op and complain. Dumb!

Cosmetic changes to keep coding style consistency in this directory;

- Indent with tab of width 8.
- Use four column to indent continuation line.
- Fold long line if possible.
- Use return (xx) instead of return xx.
- Compare pointer against NULL instead of testing like boolean.
- Delete whitespace at the end of line.
- Delete whitespace in front of function call operator.
- Delete whitespace after cast.
- Dereference a pointer to function explicitly.
- Add an empty line after local variable declaration.
- Use NULL instead of (char *)0.
- Dont use block for single statement.

Add in mtop operation MTCMPRESS, which can enable or disable tape compression.
The method for doing this is to try and use the DATA COMPRESSION mode page
first, followed by the DEVICE CONFIGURATION page (this is because most newer
tape devices are now using DATA COMPRESSION instead of DEVICE CONFIGURATION
pages).

Add in the logical && hardware read position and set position ioctls. Oddly
enough, because NetBSD is limited in having the driver track file && record
numbers, the usual agony over what to do once you use logical or hardware
block positioning can be avoided. Amusing.

Make a minor change so that for SCSIVERBOSE cases that SCSI_SILENT in
the xs' flags is still observed.

Update marc-pcmcia branch from trunk.

Declare SCSIVERBOSE by defopt in files.scsipi.  Include opt_scsiverbose.h
in scsi_base.c and st.c.

Update marc-pcmcia branch from trunk.

file st.c was added on branch marc-pcmcia on 1997-08-27 23:33:41 +0000

Merge scsipi branch in the mainline. This add support for ATAPI devices
(currently only CD-ROM drives on i386). The sys/dev/scsipi system provides 2
busses to which devices can attach (scsibus and atapibus). This needed to
change some include files and structure names in the low level scsi drivers.

Update marc-pcmcia branch from trunk.

If SCSIVERBOSE is enabled, call the routine to print out detailed sense
information.

Merge in changes from Trunk

If posting an error condition because the media has been unloaded,
make sure to set the residual count to reflect that no data was
transfered.

From Naofumi HONDA / MINOURA Makoto, PR #3007.

update these so they compile whether or not __BROKEN_INDIRECT_CONFIG
is defined.

revert previous kprintf change

printf -> kprintf, sprintf -> ksprintf

Implement ST_Q_UNIMODAL quirk, which indicates that a drive will reject
all attempts to mode select, even if the attempted mode is supported.
Add the ST_Q_UNIMODAL quirk for the HP Colorado T4000s which exhibits
this behavior.  (Someone please lob a tactical nuke in that direction.)

From David Rosenthal <dshr@vitria.com> on netbsd-bugs.

Cleanup the rest of the SCSIDEBUG printfs. From Bernd Ernesti.

Eliminate scsi_conf.h.