Driver for DaynaPORT SCSI/Link (dse.4).

Written by Hiroshi Noguchi, of which an updated version was posted to
port-mac68k in 2001.

Attachments were added to kernel configs for platforms that already had
the Cabletron (se.4) driver added, although other platorms may benefit.

Reviewed on tech-net by Izumi Tsutsui.

Split some common stuff into scsi_subr module. This enables loading
of the iscsi module whether or not there are any scsi things built
into the kernel.

Addresses the iscsi portion of kern/56772

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.

branches: 1.41.138; 1.41.142; 1.41.150; 1.41.156; 1.41.164;
merge ktrace-lwp.

make the scsibus target/lun and the atapibus drive locators optional
(they already had default values; we could kill the [...=N] syntax
completely or at least have config(8) assume that a locator with
a default is optional)

nuke trailing whitespace

branches: 1.38.4; 1.38.6;
Don't assume wdc-specific ATA / ATAPI code should be brought in if atabus
or atapibus are configured; use a separate wdc_common attribute to indicate
that the shared wdc code is also present.

Make the ATA mid-layer appears as atabus, as proposed in
http://mail-index.netbsd.org/tech-kern/2003/09/25/0006.html
This adds a device (atabus) between IDE controllers and wd or atapibus, to
have each ATA channel show up in the device tree. Later there will be atabus
devices in /dev, so that we can do IOCTL on them.
Each atabus has its own kernel thread, to handle operations that needs polling,
e.g. reset and others.

Device probing on each bus it defered to the atabus thread creation.
This allows to do the reset and basic device probes in parallel, which reduce
boot time on systems with several pciide controllers.

Merge the geometry and cache handling code for all direct access and optical
devices, as it's general to all SCSI MMC devices. In the process, remove
PQUIRK_NO_FLEX_PAGE.

Eliminate the separate ATAPI and SCSI attachments for "cd".

We only need a single attachment for uk at scsibus and atapibus.

branches: 1.33.6;
Define a "scsi_core" attribute. Make the "scsi" attribute depend on
"scsi_core". Make all the files previously selected by the "scsi"
attribute selected by the "scsi_core" attribute. Give the "scsibus"
device the "scsi_core" attribute.

Garbage-collect the empty-for-years "su" device.

branches: 1.31.8;
- convert usage of "defopt" to "defflag" where the relevant option does
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

Added the new defopt SCSI_OLD_NOINQUIRY; this is used instead
of sun2 to wrap code that conjures up INQUIRY responses for
certain specific old devices.

- replace "defopt" with "defparam" for options which must take a value,
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

branches: 1.28.2;
Add SDRETRIES and SD_IO_TIMEOUT option for sd.

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

branches: 1.25.2;
whitespace police

revert previous change

remove SES driver

add SES device

add ST_MOUNT_DELAY options for st

branches: 1.20.8;
Don't bring scsi/atapi common files in under the "atapi" attribute.
Bring them in under atapibus since they're not needed unless something
attached to an atapibus is also attached.
Tested on i386 and arm32.

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).

Allow uk to attach at atapibus.

Merge bouyer-ide

branches: 1.16.2;
opt_scsiverbose.h now is opt_scsi.h and contains the defopted
SCSIVERBOSE and the new ST_ENABLE_EARLYWARN.

branches: 1.15.2;
Split out the verbose printing of scsi messages, so that user programs
can use the printing routines.

Remove "class" declarations, and add "devclass" declarations where
appropriate. Fix several inconsistencies between device class and
attributes. Mostly from Chris Demetriou.

add support for an ATAPI attachment for 'sd'.
fix 'cd' driver's NCD_SCSI bogosity (was using testing wrong macro!)
clean up in various ways:
* make common atapi_mode_{sense,select}() functions.
* put ATAPI data structures in more sensible headers, split up by
device type.
* include headers a bit more carefully.
* pass flags to attachment-specific cd functions, and use them.
* get rid of SCSI bits in scsipi_base.h's scsipi_make_xs(), move
them into the correct place in scsi_base.c.
* fix minor typo in struct name in scsipiconf.h (which was apparently
never used except in a #define later in the same file).
* use __attribute__ to force 4-byte alignment for xs command store,
so that architectures trying to bus_space_write_multi_N() (where
N > 1) that data to a controller won't lose.
* clean up a few comments in typos, and make a few #defines easier to
understand/maintain.
* rename cd_link.h to cdvar.h (via repository copy). This is exactly
what a 'var' file is supposed to be.

Adjust for changes to config.

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.

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

branches: 1.9.2;
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.

config.new => config

Add missing arp tag for se driver.

Driver for the Cabletron EA41x SCSI Ethernet Adaptor, written by
Ian Dall <ian.dall@dsto.defence.gov.au>. Converted to "new arp"
and some other (very) minor changes by me.

Fix typo in comment.

branches: 1.4.8;
Slight adjustments for new version of ahc driver.

New device attachment scheme:

- split softc size and match/attach out from cfdriver into
a new struct cfattach.

- new "attach" directive for files.*. May specify the name of
the cfattach structure, so that devices may be easily attached
to parents with different autoconfiguration semantics.

Add SCSI scanner support by Kenneth Stailey and Joachim Koenig-Baltes,
hacked a bit. Needs more work.

config.new description of SCSI mi files.

Split some common stuff into scsi_subr module. This enables loading
of the iscsi module whether or not there are any scsi things built
into the kernel.

Addresses the iscsi portion of kern/56772

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.

branches: 1.41.138; 1.41.142; 1.41.150; 1.41.156; 1.41.164;
merge ktrace-lwp.

make the scsibus target/lun and the atapibus drive locators optional
(they already had default values; we could kill the [...=N] syntax
completely or at least have config(8) assume that a locator with
a default is optional)

nuke trailing whitespace

branches: 1.38.4; 1.38.6;
Don't assume wdc-specific ATA / ATAPI code should be brought in if atabus
or atapibus are configured; use a separate wdc_common attribute to indicate
that the shared wdc code is also present.

Make the ATA mid-layer appears as atabus, as proposed in
http://mail-index.netbsd.org/tech-kern/2003/09/25/0006.html
This adds a device (atabus) between IDE controllers and wd or atapibus, to
have each ATA channel show up in the device tree. Later there will be atabus
devices in /dev, so that we can do IOCTL on them.
Each atabus has its own kernel thread, to handle operations that needs polling,
e.g. reset and others.

Device probing on each bus it defered to the atabus thread creation.
This allows to do the reset and basic device probes in parallel, which reduce
boot time on systems with several pciide controllers.

Merge the geometry and cache handling code for all direct access and optical
devices, as it's general to all SCSI MMC devices. In the process, remove
PQUIRK_NO_FLEX_PAGE.

Eliminate the separate ATAPI and SCSI attachments for "cd".

We only need a single attachment for uk at scsibus and atapibus.

branches: 1.33.6;
Define a "scsi_core" attribute. Make the "scsi" attribute depend on
"scsi_core". Make all the files previously selected by the "scsi"
attribute selected by the "scsi_core" attribute. Give the "scsibus"
device the "scsi_core" attribute.

Garbage-collect the empty-for-years "su" device.

branches: 1.31.8;
- convert usage of "defopt" to "defflag" where the relevant option does
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

Added the new defopt SCSI_OLD_NOINQUIRY; this is used instead
of sun2 to wrap code that conjures up INQUIRY responses for
certain specific old devices.

- replace "defopt" with "defparam" for options which must take a value,
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

branches: 1.28.2;
Add SDRETRIES and SD_IO_TIMEOUT option for sd.

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

branches: 1.25.2;
whitespace police

revert previous change

remove SES driver

add SES device

add ST_MOUNT_DELAY options for st

branches: 1.20.8;
Don't bring scsi/atapi common files in under the "atapi" attribute.
Bring them in under atapibus since they're not needed unless something
attached to an atapibus is also attached.
Tested on i386 and arm32.

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).

Allow uk to attach at atapibus.

Merge bouyer-ide

branches: 1.16.2;
opt_scsiverbose.h now is opt_scsi.h and contains the defopted
SCSIVERBOSE and the new ST_ENABLE_EARLYWARN.

branches: 1.15.2;
Split out the verbose printing of scsi messages, so that user programs
can use the printing routines.

Remove "class" declarations, and add "devclass" declarations where
appropriate. Fix several inconsistencies between device class and
attributes. Mostly from Chris Demetriou.

add support for an ATAPI attachment for 'sd'.
fix 'cd' driver's NCD_SCSI bogosity (was using testing wrong macro!)
clean up in various ways:
* make common atapi_mode_{sense,select}() functions.
* put ATAPI data structures in more sensible headers, split up by
device type.
* include headers a bit more carefully.
* pass flags to attachment-specific cd functions, and use them.
* get rid of SCSI bits in scsipi_base.h's scsipi_make_xs(), move
them into the correct place in scsi_base.c.
* fix minor typo in struct name in scsipiconf.h (which was apparently
never used except in a #define later in the same file).
* use __attribute__ to force 4-byte alignment for xs command store,
so that architectures trying to bus_space_write_multi_N() (where
N > 1) that data to a controller won't lose.
* clean up a few comments in typos, and make a few #defines easier to
understand/maintain.
* rename cd_link.h to cdvar.h (via repository copy). This is exactly
what a 'var' file is supposed to be.

Adjust for changes to config.

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.

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

branches: 1.9.2;
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.

config.new => config

Add missing arp tag for se driver.

Driver for the Cabletron EA41x SCSI Ethernet Adaptor, written by
Ian Dall <ian.dall@dsto.defence.gov.au>. Converted to "new arp"
and some other (very) minor changes by me.

Fix typo in comment.

branches: 1.4.8;
Slight adjustments for new version of ahc driver.

New device attachment scheme:

- split softc size and match/attach out from cfdriver into
a new struct cfattach.

- new "attach" directive for files.*. May specify the name of
the cfattach structure, so that devices may be easily attached
to parents with different autoconfiguration semantics.

Add SCSI scanner support by Kenneth Stailey and Joachim Koenig-Baltes,
hacked a bit. Needs more work.

config.new description of SCSI mi files.

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.

branches: 1.41.138; 1.41.142; 1.41.150; 1.41.156;
merge ktrace-lwp.

make the scsibus target/lun and the atapibus drive locators optional
(they already had default values; we could kill the [...=N] syntax
completely or at least have config(8) assume that a locator with
a default is optional)

nuke trailing whitespace

branches: 1.38.4; 1.38.6;
Don't assume wdc-specific ATA / ATAPI code should be brought in if atabus
or atapibus are configured; use a separate wdc_common attribute to indicate
that the shared wdc code is also present.

Make the ATA mid-layer appears as atabus, as proposed in
http://mail-index.netbsd.org/tech-kern/2003/09/25/0006.html
This adds a device (atabus) between IDE controllers and wd or atapibus, to
have each ATA channel show up in the device tree. Later there will be atabus
devices in /dev, so that we can do IOCTL on them.
Each atabus has its own kernel thread, to handle operations that needs polling,
e.g. reset and others.

Device probing on each bus it defered to the atabus thread creation.
This allows to do the reset and basic device probes in parallel, which reduce
boot time on systems with several pciide controllers.

Merge the geometry and cache handling code for all direct access and optical
devices, as it's general to all SCSI MMC devices. In the process, remove
PQUIRK_NO_FLEX_PAGE.

Eliminate the separate ATAPI and SCSI attachments for "cd".

We only need a single attachment for uk at scsibus and atapibus.

branches: 1.33.6;
Define a "scsi_core" attribute. Make the "scsi" attribute depend on
"scsi_core". Make all the files previously selected by the "scsi"
attribute selected by the "scsi_core" attribute. Give the "scsibus"
device the "scsi_core" attribute.

Garbage-collect the empty-for-years "su" device.

branches: 1.31.8;
- convert usage of "defopt" to "defflag" where the relevant option does
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

Added the new defopt SCSI_OLD_NOINQUIRY; this is used instead
of sun2 to wrap code that conjures up INQUIRY responses for
certain specific old devices.

- replace "defopt" with "defparam" for options which must take a value,
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

branches: 1.28.2;
Add SDRETRIES and SD_IO_TIMEOUT option for sd.

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

branches: 1.25.2;
whitespace police

revert previous change

remove SES driver

add SES device

add ST_MOUNT_DELAY options for st

branches: 1.20.8;
Don't bring scsi/atapi common files in under the "atapi" attribute.
Bring them in under atapibus since they're not needed unless something
attached to an atapibus is also attached.
Tested on i386 and arm32.

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).

Allow uk to attach at atapibus.

Merge bouyer-ide

branches: 1.16.2;
opt_scsiverbose.h now is opt_scsi.h and contains the defopted
SCSIVERBOSE and the new ST_ENABLE_EARLYWARN.

branches: 1.15.2;
Split out the verbose printing of scsi messages, so that user programs
can use the printing routines.

Remove "class" declarations, and add "devclass" declarations where
appropriate. Fix several inconsistencies between device class and
attributes. Mostly from Chris Demetriou.

add support for an ATAPI attachment for 'sd'.
fix 'cd' driver's NCD_SCSI bogosity (was using testing wrong macro!)
clean up in various ways:
* make common atapi_mode_{sense,select}() functions.
* put ATAPI data structures in more sensible headers, split up by
device type.
* include headers a bit more carefully.
* pass flags to attachment-specific cd functions, and use them.
* get rid of SCSI bits in scsipi_base.h's scsipi_make_xs(), move
them into the correct place in scsi_base.c.
* fix minor typo in struct name in scsipiconf.h (which was apparently
never used except in a #define later in the same file).
* use __attribute__ to force 4-byte alignment for xs command store,
so that architectures trying to bus_space_write_multi_N() (where
N > 1) that data to a controller won't lose.
* clean up a few comments in typos, and make a few #defines easier to
understand/maintain.
* rename cd_link.h to cdvar.h (via repository copy). This is exactly
what a 'var' file is supposed to be.

Adjust for changes to config.

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.

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

branches: 1.9.2;
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.

config.new => config

Add missing arp tag for se driver.

Driver for the Cabletron EA41x SCSI Ethernet Adaptor, written by
Ian Dall <ian.dall@dsto.defence.gov.au>. Converted to "new arp"
and some other (very) minor changes by me.

Fix typo in comment.

branches: 1.4.8;
Slight adjustments for new version of ahc driver.

New device attachment scheme:

- split softc size and match/attach out from cfdriver into
a new struct cfattach.

- new "attach" directive for files.*. May specify the name of
the cfattach structure, so that devices may be easily attached
to parents with different autoconfiguration semantics.

Add SCSI scanner support by Kenneth Stailey and Joachim Koenig-Baltes,
hacked a bit. Needs more work.

config.new description of SCSI mi files.