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CVS log for src/sys/dev/misc/spigot/spigot.c

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Revision 1.16: download - view: text, markup, annotated - select for diffs
Sat Aug 2 01:14:42 2008 UTC (6 years ago) by dillon
Branches: MAIN
CVS tags: HEAD
Diff to: previous 1.15: preferred, unified
Changes since revision 1.15: +1 -1 lines
Create an #include layer for bus/pci and bus/isa so source files do not
have to dive into bus/xxx/i386 to access header files.

Revision 1.15: download - view: text, markup, annotated - select for diffs
Sat Feb 3 17:05:57 2007 UTC (7 years, 5 months ago) by corecode
Branches: MAIN
CVS tags: DragonFly_RELEASE_2_0_Slip, DragonFly_RELEASE_2_0, DragonFly_RELEASE_1_12_Slip, DragonFly_RELEASE_1_12, DragonFly_RELEASE_1_10_Slip, DragonFly_RELEASE_1_10, DragonFly_Preview
Diff to: previous 1.14: preferred, unified
Changes since revision 1.14: +2 -2 lines
1:1 Userland threading stage 2.11/4:

Move signals into lwps, take p_lwp out of proc.

Originally-Submitted-by:  David Xu <davidxu@freebsd.org>
Reviewed-by: Thomas E. Spanjaard <tgen@netphreax.net>

Revision 1.14: download - view: text, markup, annotated - select for diffs
Sun Sep 10 01:26:35 2006 UTC (7 years, 10 months ago) by dillon
Branches: MAIN
CVS tags: DragonFly_RELEASE_1_8_Slip, DragonFly_RELEASE_1_8
Diff to: previous 1.13: preferred, unified
Changes since revision 1.13: +3 -3 lines
Change the kernel dev_t, representing a pointer to a specinfo structure,
to cdev_t.  Change struct specinfo to struct cdev.  The name 'cdev' was taken
from FreeBSD.  Remove the dev_t shim for the kernel.

This commit generally removes the overloading of 'dev_t' between userland and
the kernel.

Also fix a bug in libkvm where a kernel dev_t (now cdev_t) was not being
properly converted to a userland dev_t.

Revision 1.13: download - view: text, markup, annotated - select for diffs
Sun Sep 3 18:29:16 2006 UTC (7 years, 10 months ago) by dillon
Branches: MAIN
Diff to: previous 1.12: preferred, unified
Changes since revision 1.12: +1 -1 lines
Rename functions to avoid conflicts with libc.

Revision 1.12: download - view: text, markup, annotated - select for diffs
Fri Jul 28 02:17:36 2006 UTC (8 years ago) by dillon
Branches: MAIN
Diff to: previous 1.11: preferred, unified
Changes since revision 1.11: +50 -49 lines
MASSIVE reorganization of the device operations vector.  Change cdevsw
to dev_ops.  dev_ops is a syslink-compatible operations vector structure
similar to the vop_ops structure used by vnodes.

Remove a huge number of instances where a thread pointer is still being
passed as an argument to various device ops and other related routines.
The device OPEN and IOCTL calls now take a ucred instead of a thread pointer,
and the CLOSE call no longer takes a thread pointer.

Revision 1.11: download - view: text, markup, annotated - select for diffs
Thu Oct 13 08:50:33 2005 UTC (8 years, 9 months ago) by sephe
Branches: MAIN
CVS tags: DragonFly_RELEASE_1_6_Slip, DragonFly_RELEASE_1_6, DragonFly_RELEASE_1_4_Slip, DragonFly_RELEASE_1_4
Diff to: previous 1.10: preferred, unified
Changes since revision 1.10: +2 -2 lines
unbreak LINT building

Revision 1.10: download - view: text, markup, annotated - select for diffs
Thu Oct 13 00:02:33 2005 UTC (8 years, 9 months ago) by dillon
Branches: MAIN
Diff to: previous 1.9: preferred, unified
Changes since revision 1.9: +4 -3 lines
Major cleanup of the interrupt registration subsystem.

* Collapse the separate registrations in the kernel interrupt thread and
  i386 layers into a single machine-independant kernel interrupt thread layer
  in kern/kern_intr.c.  Get rid of the i386 layer's 'MUX' code entirely.

* Have the interrupt vector assembly code (icu_vector.s and apic_vector.s)
  call a machine-independant function in the kernel interrupt thread
  layer to figure out how to process an interrupt.

* Move a lot of assembly into the new C interrupt processing function.

* Add support for INTR_MPSAFE.  If a device driver registers an interrupt
  as being MPSAFE, the Big Giant Lock will not be obtained or required.

* Temporarily just schedule the ithread if a FAST interrupt cannot be executed
  due to its serializer being locked.

* Add LWKT serialization support for a non-blocking 'try' function.

* Get rid of ointhand2_t and adjust all old ISA code to use inthand2_t.

* Supply a frame pointer as a pointer rather then embedding it on th stack.

* Allow FAST and SLOW interrupts to be mixed on the same IRQ, though this
  will not necessarily result in optimal operation.

* Remove direct APIC/ICU vector calls from the apic/icu vector assembly code.
  Everything goes through the new routine in kern/kern_intr.c now.

* Add a new flag, INTR_NOPOLL.  Interrupts registered with the flag will
  not be polled by the upcoming emergency general interrupt polling
  sysctl (e.g. ATA cannot be safely polled due to the way ATA register
  access interferes with ATA DMA).

* Remove most of the distinction in the i386 assembly layers between FAST
  and SLOW interrupts (part 1/2).

* Revamp the interrupt name array returned to userland to list multiple
  drivers associated with the same IRQ.

Revision 1.9: download - view: text, markup, annotated - select for diffs
Wed May 19 22:52:44 2004 UTC (10 years, 2 months ago) by dillon
Branches: MAIN
CVS tags: DragonFly_Stable, DragonFly_Snap29Sep2004, DragonFly_Snap13Sep2004, DragonFly_RELEASE_1_2_Slip, DragonFly_RELEASE_1_2, DragonFly_1_0_REL, DragonFly_1_0_RC1, DragonFly_1_0A_REL
Diff to: previous 1.8: preferred, unified
Changes since revision 1.8: +4 -6 lines
Device layer rollup commit.

* cdevsw_add() is now required.  cdevsw_add() and cdevsw_remove() may specify
  a mask/match indicating the range of supported minor numbers.  Multiple
  cdevsw_add()'s using the same major number, but distinctly different
  ranges, may be issued.  All devices that failed to call cdevsw_add() before
  now do.

* cdevsw_remove() now automatically marks all devices within its supported
  range as being destroyed.

* vnode->v_rdev is no longer resolved when the vnode is created.  Instead,
  only v_udev (a newly added field) is resolved.  v_rdev is resolved when
  the vnode is opened and cleared on the last close.

* A great deal of code was making rather dubious assumptions with regards
  to the validity of devices associated with vnodes, primarily due to
  the persistence of a device structure due to being indexed by (major, minor)
  instead of by (cdevsw, major, minor).  In particular, if you run a program
  which connects to a USB device and then you pull the USB device and plug
  it back in, the vnode subsystem will continue to believe that the device
  is open when, in fact, it isn't (because it was destroyed and recreated).

  In particular, note that all the VFS mount procedures now check devices
  via v_udev instead of v_rdev prior to calling VOP_OPEN(), since v_rdev
  is NULL prior to the first open.

* The disk layer's device interaction has been rewritten.  The disk layer
  (i.e. the slice and disklabel management layer) no longer overloads
  its data onto the device structure representing the underlying physical
  disk.  Instead, the disk layer uses the new cdevsw_add() functionality
  to register its own cdevsw using the underlying device's major number,
  and simply does NOT register the underlying device's cdevsw.  No
  confusion is created because the device hash is now based on
  (cdevsw,major,minor) rather then (major,minor).

  NOTE: This also means that underlying raw disk devices may use the entire
  device minor number instead of having to reserve the bits used by the disk
  layer, and also means that can we (theoretically) stack a fully
  disklabel-supported 'disk' on top of any block device.

* The new reference counting scheme prevents this by associating a device
  with a cdevsw and disconnecting the device from its cdevsw when the cdevsw
  is removed.  Additionally, all udev2dev() lookups run through the cdevsw
  mask/match and only successfully find devices still associated with an
  active cdevsw.

* Major work on MFS:  MFS no longer shortcuts vnode and device creation.  It
  now creates a real vnode and a real device and implements real open and
  close VOPs.  Additionally, due to the disk layer changes, MFS is no longer
  limited to 255 mounts.  The new limit is 16 million.  Since MFS creates a
  real device node, mount_mfs will now create a real /dev/mfs<PID> device
  that can be read from userland (e.g. so you can dump an MFS filesystem).

* BUF AND DEVICE STRATEGY changes.  The struct buf contains a b_dev field.
  In order to properly handle stacked devices we now require that the b_dev
  field be initialized before the device strategy routine is called.  This
  required some additional work in various VFS implementations.  To enforce
  this requirement, biodone() now sets b_dev to NODEV.  The new disk layer
  will adjust b_dev before forwarding a request to the actual physical
  device.

* A bug in the ISO CD boot sequence which resulted in a panic has been fixed.

Testing by: lots of people, but David Rhodus found the most aggregious bugs.

Revision 1.8: download - view: text, markup, annotated - select for diffs
Thu May 13 23:49:17 2004 UTC (10 years, 2 months ago) by dillon
Branches: MAIN
Diff to: previous 1.7: preferred, unified
Changes since revision 1.7: +1 -1 lines
device switch 1/many: Remove d_autoq, add d_clone (where d_autoq was).

d_autoq was used to allow the device port dispatch to mix old-style synchronous
calls with new style messaging calls within a particular device.  It was never
used for that purpose.

d_clone will be more fully implemented as work continues.  We are going to
install d_port in the dev_t (struct specinfo) structure itself and d_clone
will be needed to allow devices to 'revector' the port on a minor-number
by minor-number basis, in particular allowing minor numbers to be directly
dispatched to distinct threads.  This is something we will be needing later
on.

Revision 1.7: download - view: text, markup, annotated - select for diffs
Mon Aug 11 17:50:15 2003 UTC (10 years, 11 months ago) by drhodus
Branches: MAIN
Diff to: previous 1.6: preferred, unified
Changes since revision 1.6: +2 -0 lines

Add or correct range checking of signal numbers in system calls and
ioctls.

Revision 1.6: download - view: text, markup, annotated - select for diffs
Thu Aug 7 21:16:58 2003 UTC (10 years, 11 months ago) by dillon
Branches: MAIN
Diff to: previous 1.5: preferred, unified
Changes since revision 1.5: +2 -2 lines
kernel tree reorganization stage 1: Major cvs repository work (not logged as
commits) plus a major reworking of the #include's to accomodate the
relocations.

    * CVS repository files manually moved.  Old directories left intact
      and empty (temporary).

    * Reorganize all filesystems into vfs/, most devices into dev/,
      sub-divide devices by function.

    * Begin to move device-specific architecture files to the device
      subdirs rather then throwing them all into, e.g. i386/include

    * Reorganize files related to system busses, placing the related code
      in a new bus/ directory.  Also move cam to bus/cam though this may
      not have been the best idea in retrospect.

    * Reorganize emulation code and place it in a new emulation/ directory.

    * Remove the -I- compiler option in order to allow #include file
      localization, rename all config generated X.h files to use_X.h to
      clean up the conflicts.

    * Remove /usr/src/include (or /usr/include) dependancies during the
      kernel build, beyond what is normally needed to compile helper
      programs.

    * Make config create 'machine' softlinks for architecture specific
      directories outside of the standard <arch>/include.

    * Bump the config rev.

    WARNING! after this commit /usr/include and /usr/src/sys/compile/*
    should be regenerated from scratch.

Revision 1.5: download - view: text, markup, annotated - select for diffs
Mon Jul 21 07:57:45 2003 UTC (11 years ago) by dillon
Branches: MAIN
Diff to: previous 1.4: preferred, unified
Changes since revision 1.4: +6 -6 lines
LINT build test.  Aggregated source code adjustments to bring most of the
rest of the kernel source up to date, using the LINT build.

Revision 1.4: download - view: text, markup, annotated - select for diffs
Mon Jul 21 05:50:40 2003 UTC (11 years ago) by dillon
Branches: MAIN
Diff to: previous 1.3: preferred, unified
Changes since revision 1.3: +8 -6 lines
DEV messaging stage 1/4: Rearrange struct cdevsw and add a message port
and auto-queueing mask.  The mask will tell us which message functions
can be safely queued to another thread and which still need to run in the
context of the caller.   Primary configuration fields (name, cmaj, flags,
port, autoq mask) are now at the head of the structure.  Function vectors,
which may eventually go away, are at the end.  The port and autoq fields
are non-functional in this stage.

The old BDEV device major number support has also been removed from cdevsw,
and code has been added to translate the bootdev passed from the boot code
(the boot code has always passed the now defunct block device major numbers
and we obviously need to keep that compatibility intact).

Revision 1.3: download - view: text, markup, annotated - select for diffs
Wed Jun 25 03:55:54 2003 UTC (11 years, 1 month ago) by dillon
Branches: MAIN
CVS tags: PRE_MP
Diff to: previous 1.2: preferred, unified
Changes since revision 1.2: +3 -3 lines
proc->thread stage 4: rework the VFS and DEVICE subsystems to take thread
pointers instead of process pointers as arguments, similar to what FreeBSD-5
did.  Note however that ultimately both APIs are going to be message-passing
which means the current thread context will not be useable for creds and
descriptor access.

Revision 1.2: download - view: text, markup, annotated - select for diffs
Tue Jun 17 04:28:37 2003 UTC (11 years, 1 month ago) by dillon
Branches: MAIN
Diff to: previous 1.1: preferred, unified
Changes since revision 1.1: +1 -0 lines
Add the DragonFly cvs id and perform general cleanups on cvs/rcs/sccs ids.  Most
ids have been removed from !lint sections and moved into comment sections.

Revision 1.1: download - view: text, markup, annotated - select for diffs
Tue Jun 17 02:54:49 2003 UTC (11 years, 1 month ago) by dillon
Branches: MAIN
CVS tags: FREEBSD_4_FORK
import from FreeBSD RELENG_4 1.44

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