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History log of /src/sys/dev/scsipi/uk.c
RevisionDateAuthorComments
 1.65  20-Nov-2016  mlelstv 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.
 1.64  05-Aug-2016  maya uk(4) is safe to suspend, register it as such
 1.63  14-Jul-2016  msaitoh branches: 1.63.2;
- Use aprint*() instead of printf() in xxx_attach().
- Add missing aprint_naive("\n");
- KNF
 1.62  25-Jul-2014  dholland branches: 1.62.4;
Add d_discard to all struct cdevsw instances I could find.

All have been set to "nodiscard"; some should get a real implementation.
 1.61  16-Mar-2014  dholland branches: 1.61.2;
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.
 1.60  08-Feb-2012  mbalmer branches: 1.60.6; 1.60.10;
Convert uk(4) to device_t. While here, clean up the code a bit.
releng ok (ack 3, nak 0, wait no more)
 1.59  06-Dec-2009  dyoung branches: 1.59.12; 1.59.16;
Delete do-nothing device-activation hooks.
 1.58  12-May-2009  cegger struct device * -> device_t, no functional changes intended.
 1.57  12-May-2009  cegger struct cfdata * -> cfdata_t, no functional changes intended.
 1.56  11-Jan-2009  cegger branches: 1.56.2;
make this compile
 1.55  08-Jun-2008  tsutsui branches: 1.55.6;
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.
 1.54  28-Apr-2008  martin branches: 1.54.2;
Remove clause 3 and 4 from TNF licenses
 1.53  05-Apr-2008  cegger branches: 1.53.2; 1.53.4;
use aprint_*_dev and device_xname
 1.52  04-Mar-2007  christos branches: 1.52.36;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.
 1.51  16-Nov-2006  christos branches: 1.51.4;
__unused removal on arguments; approved by core.
 1.50  12-Oct-2006  christos - sprinkle __unused on function decls.
- fix a couple of unused bugs
- no more -Wno-unused for i386
 1.49  03-Sep-2006  christos branches: 1.49.2; 1.49.4;
add missing initializer
 1.48  30-Mar-2006  thorpej Use device_private().
 1.47  28-Mar-2006  thorpej Use device_unit().
 1.46  11-Dec-2005  christos branches: 1.46.4; 1.46.6; 1.46.8; 1.46.10; 1.46.12;
merge ktrace-lwp.
 1.45  27-Feb-2005  perry branches: 1.45.4;
nuke trailing whitespace
 1.44  01-Feb-2005  reinoud 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.
 1.43  31-Jan-2005  reinoud 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.
 1.42  21-Aug-2004  thorpej branches: 1.42.4; 1.42.6;
Use ANSI function decls and make use of static.
 1.41  08-Sep-2003  mycroft We only need a single attachment for uk at scsibus and atapibus.
 1.40  29-Jun-2003  fvdl branches: 1.40.2;
Back out the lwp/ktrace changes. They contained a lot of colateral damage,
and need to be examined and discussed more.
 1.39  28-Jun-2003  darrenr 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
 1.38  23-Oct-2002  jdolecek 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
 1.37  02-Oct-2002  thorpej Add trailing ; to CFATTACH_DECL.
 1.36  30-Sep-2002  thorpej Use CFATTACH_DECL().
 1.35  27-Sep-2002  thorpej Declare all cfattach structures const.
 1.34  06-Sep-2002  gehenna 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.
 1.33  10-Feb-2002  thorpej branches: 1.33.8;
Remove a pretty much useless autoconfiguration message.
 1.32  15-Nov-2001  lukem don't need <sys/types.h> when including <sys/param.h>
 1.31  13-Nov-2001  lukem add RCSIDs
 1.30  25-Apr-2001  bouyer branches: 1.30.2; 1.30.4;
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
 1.29  30-Mar-2000  augustss branches: 1.29.6;
Get rid of register declarations.
 1.28  29-Mar-2000  augustss Add ukactivate&ukdetach so uk devices can be detached.
 1.27  08-Dec-1998  thorpej branches: 1.27.10;
When closing, wait for pending xfers to drain before deleting the reference
to the adapter.
 1.26  20-Nov-1998  thorpej Add adapter reference counting for SCSI and ATAPI devices.
 1.25  19-Oct-1998  bouyer Allow uk to attach at atapibus.
 1.24  31-Aug-1998  cgd kill the last remnants of __BROKEN_INDIRECT_CONFIG. (only the pica port
used it, and it's non-working and apparently slated for replacement.)
 1.23  17-Aug-1998  mycroft Assign my copyrights to TNF.
 1.22  15-Aug-1998  mycroft Make copyright notices with my name consistent.
 1.21  12-Jan-1998  thorpej Adjust for changes to config.
 1.20  01-Oct-1997  enami 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.
 1.19  27-Aug-1997  bouyer branches: 1.19.2;
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.
 1.18  05-Dec-1996  cgd update these so they compile whether or not __BROKEN_INDIRECT_CONFIG
is defined.
 1.17  12-Oct-1996  christos revert previous kprintf change
 1.16  10-Oct-1996  christos - printf -> kprintf, sprintf -> ksprintf
- make this compile cleanly.
 1.15  17-Mar-1996  thorpej 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.
 1.14  05-Mar-1996  thorpej Normalize SCSI autoconfiguration output.
From Chris Demetriou <cgd@NetBSD.ORG>. Fixes PR #1958.
 1.13  24-Mar-1995  glass fix syntax error. Andreas Gustafsson <gson@clinet.fi>
 1.12  28-Dec-1994  mycroft Numerous changes. Many bugs fixed, better autoconfig, a few new features.
 1.11  21-Nov-1994  mycroft Clean up open and close routines somewhat.
 1.10  21-Nov-1994  mycroft Replace dev_unit with device_softc in scsi_link. Change argument to foostart()
to void*.
 1.9  30-Oct-1994  cgd be more careful with types, also pull in headers where necessary.
 1.8  20-Oct-1994  mycroft First cut at making user-level SCSI commands work. This is untested.
Partly from John Brezak.
 1.7  29-Jun-1994  cgd New RCS ID's, take two. they're more aesthecially pleasant, and use 'NetBSD'
 1.6  11-Apr-1994  mycroft Fix various types. Remove some outdated flags.
 1.5  29-Mar-1994  mycroft New SCSI system, based on Julian's more recent work.
 1.4  16-Feb-1994  mycroft More KNF-like.
 1.3  01-Feb-1994  mycroft Add scsi_stop_unit(), from Mac code. Other minor nits.
 1.2  17-Dec-1993  mycroft Canonicalize all #includes.
 1.1  24-Nov-1993  mycroft Under construction...
 1.19.2.3  14-Oct-1997  thorpej Update marc-pcmcia branch from trunk.
 1.19.2.2  27-Aug-1997  thorpej Update marc-pcmcia branch from trunk.
 1.19.2.1  27-Aug-1997  thorpej file uk.c was added on branch marc-pcmcia on 1997-08-27 23:33:43 +0000
 1.27.10.3  20-Nov-2000  bouyer 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
 1.27.10.2  01-Nov-1999  thorpej Fixup the SC_DEBUG() stuff for the new world order.
 1.27.10.1  19-Oct-1999  thorpej 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.
 1.29.6.7  11-Nov-2002  nathanw Catch up to -current
 1.29.6.6  18-Oct-2002  nathanw Catch up to -current.
 1.29.6.5  17-Sep-2002  nathanw Catch up to -current.
 1.29.6.4  28-Feb-2002  nathanw Catch up to -current.
 1.29.6.3  08-Jan-2002  nathanw Catch up to -current.
 1.29.6.2  14-Nov-2001  nathanw Catch up to -current.
 1.29.6.1  21-Jun-2001  nathanw Catch up to -current.
 1.30.4.2  26-Sep-2001  fvdl * 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
 1.30.4.1  07-Sep-2001  thorpej 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).
 1.30.2.3  10-Oct-2002  jdolecek sync kqueue with -current; this includes merge of gehenna-devsw branch,
merge of i386 MP branch, and part of autoconf rototil work
 1.30.2.2  16-Mar-2002  jdolecek Catch up with -current.
 1.30.2.1  10-Jan-2002  thorpej Sync kqueue branch with -current.
 1.33.8.1  16-May-2002  gehenna Add the character device switch.
Replace the direct-access to devsw table with calling devsw API.
 1.40.2.6  04-Mar-2005  skrll Sync with HEAD.

Hi Perry!
 1.40.2.5  21-Sep-2004  skrll Fix the sync with head I botched.
 1.40.2.4  18-Sep-2004  skrll Sync with HEAD.
 1.40.2.3  25-Aug-2004  skrll Sync with HEAD.
 1.40.2.2  03-Aug-2004  skrll Sync with HEAD
 1.40.2.1  02-Jul-2003  darrenr 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.
 1.42.6.1  19-Mar-2005  yamt sync with head. xen and whitespace. xen part is not finished.
 1.42.4.1  29-Apr-2005  kent sync with -current
 1.45.4.3  03-Sep-2007  yamt sync with head.
 1.45.4.2  30-Dec-2006  yamt sync with head.
 1.45.4.1  21-Jun-2006  yamt sync with head.
 1.46.12.1  31-Mar-2006  tron Merge 2006-03-31 NetBSD-current into the "peter-altq" branch.
 1.46.10.1  19-Apr-2006  elad sync with head.
 1.46.8.2  14-Sep-2006  yamt sync with head.
 1.46.8.1  01-Apr-2006  yamt sync with head.
 1.46.6.1  22-Apr-2006  simonb Sync with head.
 1.46.4.1  09-Sep-2006  rpaulo sync with head
 1.49.4.2  10-Dec-2006  yamt sync with head.
 1.49.4.1  22-Oct-2006  yamt sync with head
 1.49.2.1  18-Nov-2006  ad Sync with head.
 1.51.4.1  12-Mar-2007  rmind Sync with HEAD.
 1.52.36.5  17-Jan-2009  mjf Sync with HEAD.
 1.52.36.4  29-Jun-2008  mjf Sync with HEAD.
 1.52.36.3  02-Jun-2008  mjf Sync with HEAD.
 1.52.36.2  06-Apr-2008  mjf - after some discussion with agc@ i agreed it would be a good idea to move
device_unregister_* to device_deregister_* to be more like the pmf(9)
functions, especially since a lot of the time the function calls are next
to each other.

- add device_register_name() support for dk(4).
 1.52.36.1  05-Apr-2008  mjf - 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.
 1.53.4.4  11-Mar-2010  yamt sync with head
 1.53.4.3  16-May-2009  yamt sync with head
 1.53.4.2  04-May-2009  yamt sync with head.
 1.53.4.1  16-May-2008  yamt sync with head.
 1.53.2.2  17-Jun-2008  yamt sync with head.
 1.53.2.1  18-May-2008  yamt sync with head.
 1.54.2.1  23-Jun-2008  wrstuden Sync w/ -current. 34 merge conflicts to follow.
 1.55.6.1  19-Jan-2009  skrll Sync with HEAD.
 1.56.2.1  13-May-2009  jym Sync with HEAD.

Commit is split, to avoid a "too many arguments" protocol error.
 1.59.16.1  18-Feb-2012  mrg merge to -current.
 1.59.12.2  22-May-2014  yamt 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")
 1.59.12.1  17-Apr-2012  yamt sync with head
 1.60.10.1  18-May-2014  rmind sync with head
 1.60.6.2  03-Dec-2017  jdolecek update from HEAD
 1.60.6.1  20-Aug-2014  tls Rebase to HEAD as of a few days ago.
 1.61.2.1  10-Aug-2014  tls Rebase.
 1.62.4.2  05-Dec-2016  skrll Sync with HEAD
 1.62.4.1  05-Oct-2016  skrll Sync with HEAD
 1.63.2.2  07-Jan-2017  pgoyette Sync with HEAD. (Note that most of these changes are simply $NetBSD$
tag issues.)
 1.63.2.1  06-Aug-2016  pgoyette Sync with HEAD

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