Commit Graph

39 Commits

Author SHA1 Message Date
Nick Hibma
394b7d0877 Change calling of chained event handler from always after
the attach/detach to
1) MOD_LOAD before attach
2) MOD_UNLOAD after detach

The driver specific event handler can now be used to function as
driver specific init/deinit function (compare to device specific
init/deinit functions: attach & detach).
1999-08-16 21:44:14 +00:00
Nick Hibma
43818d4ec7 add debugging message in unregister_method 1999-08-14 13:32:25 +00:00
Nick Hibma
dd473d08e0 Minor spelling glitch 1999-08-14 13:20:04 +00:00
Bill Paul
b7f6c65f7c Grrrr. Fix a really lame bug that I tripped over while testing my miibus
stuff: unregister_methods() is horribly broken. The idea, if I'm not mistaken,
is that the refcount on a method is decremented, and only when it reaches
zero is the method freed. However desc->method is set to NULL unconditionally
regardless of the refcount, which means the method pointer is trashed the
first time the method is deallocated. The obvious detrimental effect is
that memory is leaked. The not so obvious effect is that when you call
unregister_method() the second time on the same method, you get a NULL
pointer dereference and a panic.

Now I can successfully unload network device drivers and the miibus module
without crashing the system.

*sigh*
1999-08-14 05:11:01 +00:00
Peter Wemm
e426af039f Make subr_bus.c actually compile with -DBUS_DEBUG 1999-08-11 22:55:39 +00:00
Peter Wemm
3af0907ba4 Zap some stray references to DRIVER_TYPE_foo in the BUS_DEBUG case, as
discovered by Bill Paul.
1999-08-11 22:05:17 +00:00
Matthew N. Dodd
f4e3b1e7dd Fix a typo.
Back out a few lines that I haven't dealt with properly yet.

Snickered at by: Mike Smith
1999-07-29 01:51:49 +00:00
Matthew N. Dodd
15317dd875 Alter the behavior of sys/kern/subr_bus.c:device_print_child()
- device_print_child() either lets the BUS_PRINT_CHILD
	  method produce the entire device announcement message or
	  it prints "foo0: not found\n"

Alter sys/kern/subr_bus.c:bus_generic_print_child() to take on
the previous behavior of device_print_child() (printing the
"foo0: <FooDevice 1.1>" bit of the announce message.)

Provide bus_print_child_header() and bus_print_child_footer()
to actually print the output for bus_generic_print_child().
These functions should be used whenever possible (unless you can
just use bus_generic_print_child())

The BUS_PRINT_CHILD method now returns int instead of void.

Modify everything else that defines or uses a BUS_PRINT_CHILD
method to comply with the above changes.

	- Devices are 'on' a bus, not 'at' it.
	- If a custom BUS_PRINT_CHILD method does the same thing
	  as bus_generic_print_child(), use bus_generic_print_child()
	- Use device_get_nameunit() instead of both
	  device_get_name() and device_get_unit()
	- All BUS_PRINT_CHILD methods return the number of
	  characters output.

Reviewed by: dfr, peter
1999-07-29 01:03:04 +00:00
Doug Rabson
f1550d9d41 This makes the in kernel printf routines conform to the documented
behavior of their userland counterparts with respect to return values.

Submitted by: Matthew N. Dodd <winter@jurai.net>
1999-07-24 09:34:12 +00:00
Doug Rabson
ca7036d8cb Add a hook for a bus to detect child devices which didn't find drivers.
This allows the bus to print an informative message about unknown devices.

Submitted by: Matthew N. Dodd <winter@jurai.net>
1999-07-11 13:42:37 +00:00
Doug Rabson
20b62c5ac9 * Add a function devclass_create() which looks up the named devclass and
creates it if it doesn't exist.
* Rename resource_list_remove() to resource_list_delete() for consistency.
1999-05-30 10:27:11 +00:00
Doug Rabson
bea6af4d31 * Change device_add_child_after() to device_add_child_ordered() which is
easier to use and more flexible.
* Change BUS_ADD_CHILD to take an order argument instead of a place.
* Define a partial ordering for isa devices so that sensitive devices are
  probed before non-sensitive ones.
1999-05-28 09:25:16 +00:00
Doug Rabson
8be70a6eac Fix an embarrasing typo in device_add_child_after(). I can't understand
how this hasn't caused problems before.

Submitted by: Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
1999-05-27 07:18:41 +00:00
Doug Rabson
7e082b48a2 Add some helper functions to make it easier to write a driver for a bus
which needs to manage resources for its children.
1999-05-22 14:57:15 +00:00
Peter Wemm
13b758eb46 Add seatbelt like in previous function.. 1999-05-22 09:52:21 +00:00
Doug Rabson
0053cc2cfe Silently return NULL from devclass_get_device if dc == NULL. The caller
should be handling NULL returns already.

Submitted by: Andrew Gallatin <gallatin@cs.duke.edu>
1999-05-21 08:23:58 +00:00
Doug Rabson
6c2e3dde8c * Define a new static method DEVICE_IDENTIFY which is called to add device
instances to a parent bus.
* Define a new method BUS_ADD_CHILD which can be called from DEVICE_IDENTIFY
  to add new instances.
* Add a generic implementation of DEVICE_PROBE which calls DEVICE_IDENTIFY
  for each driver attached to the parent's devclass.
* Move the hint-based isa probe from the isa driver to a new isahint driver
  which can be shared between i386 and alpha.
1999-05-14 11:22:47 +00:00
Doug Rabson
454a0546ba Adjust method dispatch to ensure that default methods are called properly. 1999-05-14 09:13:43 +00:00
Doug Rabson
8b2970bbe6 * Augment the interface language to allow arbitrary C code to be 'passed
through' to the C compiler.
* Allow the interface to specify a default implementation for methods.
* Allow 'static' methods which are not device specific.
* Add a simple scheme for probe routines to return a priority value. To
  make life simple, priority values are negative numbers (positive numbers
  are standard errno codes) with zero being the highest priority. The
  driver which returns the highest priority will be chosen for the device.
1999-05-10 17:06:14 +00:00
Doug Rabson
566643e39e Move the declaration of the interrupt type from the driver structure
to the BUS_SETUP_INTR call.
1999-05-08 21:59:43 +00:00
Peter Wemm
73d35bdd96 Change resource_set_*() to be more useful. BTW; resource_find() is a
bit odd, it looks like the wildcard stuff isn't right.
1999-05-08 18:08:59 +00:00
Peter Wemm
4d823d728f GC some stray debugging printf()s... 1999-04-19 19:39:08 +00:00
Peter Wemm
6182fdbda8 Bring the 'new-bus' to the i386. This extensively changes the way the
i386 platform boots, it is no longer ISA-centric, and is fully dynamic.
Most old drivers compile and run without modification via 'compatability
shims' to enable a smoother transition.  eisa, isapnp and pccard* are
not yet using the new resource manager.  Once fully converted, all drivers
will be loadable, including PCI and ISA.

(Some other changes appear to have snuck in, including a port of Soren's
 ATA driver to the Alpha.  Soren, back this out if you need to.)

This is a checkpoint of work-in-progress, but is quite functional.

The bulk of the work was done over the last few years by Doug Rabson and
Garrett Wollman.

Approved by:	core
1999-04-16 21:22:55 +00:00
Doug Rabson
6350e58a8a Add some useful functions to the device framework:
* bus_setup_intr() as a wrapper for BUS_SETUP_INTR
* bus_teardown_intr() as a wrapper for BUS_TEARDOWN_INTR
* device_get_nameunit() which returns e.g. "foo0" for name "foo" and unit 0.
* device_set_desc_copy() malloc a copy of the description string.
* device_quiet(), device_is_quiet(), device_verbose() suppress probe message.

Add one method to the BUS interface, BUS_CHILD_DETACHED() which is called
after the child has been detached to allow the bus to clean up any memory
which it allocated on behalf of the child.

I also fixed a bug which corrupted the list of drivers in a devclass if
a driver was added to more than one devclass.
1999-03-29 08:54:20 +00:00
Matthew Dillon
d254af07a1 Fix warnings in preparation for adding -Wall -Wcast-qual to the
kernel compile
1999-01-27 21:50:00 +00:00
Doug Rabson
c3654b5c4d A few small improvements to the bus code:
* A function device_printf() to make pretty-printing driver messages easier.
* A function device_get_children() to query the children of a device.
* Generic implementations of BUS_ALLOC_RESOURCE and BUS_RELEASE_RESOURCE.
* Change bus_generic_print_child() so that it is actually useful.
1999-01-16 17:44:09 +00:00
Nick Hibma
181aa362df Remove warning 1999-01-10 22:04:05 +00:00
Nick Hibma
b3f65f42c0 When no driver was found for a device, the message 'not probed' appeared
This is odd, especially in the case of USB where the driver is found
in several tries: vendor specific, class specific, interface specific.
The mouse driver is found at the interface specific level...
Reviewed by:	Doug Rabson (dfr@freebsd.org)
1998-12-12 11:30:04 +00:00
Doug Rabson
921433915d A couple of minor sanity checks.
Submitted by: Nick Hibma <nick.hibma@jrc.it>
1998-11-15 18:11:21 +00:00
Garrett Wollman
14177d72cd My changes to the new device interface:
- Interface wth the new resource manager.
	- Allow for multiple drivers implementing a single devclass.
	- Remove ordering dependencies between header files.
	- Style cleanup.
	- Add DEVICE_SUSPEND and DEVICE_RESUME methods.
	- Move to a single-phase interrupt setup scheme.

Kernel builds on the Alpha are brken until Doug gets a chance to incorporate
these changes on that side.

Agreed to in principle by: dfr
1998-11-14 21:58:51 +00:00
Doug Rabson
92c6ae04da A couple of fixes to device_delete_child() to delete all children of
the device and to free the device which is being deleted (not its
parent - oops).

Submitted by: Nick Hibma <nick.hibma@jrc.it>
1998-11-13 09:39:37 +00:00
Doug Rabson
45a576b57a Lots of debugging code and some bugfixes.
Submitted by: Nick Hibma <nick.hibma@jrc.it>
1998-10-27 09:21:43 +00:00
Poul-Henning Kamp
f5ef029e92 Nitpicking and dusting performed on a train. Removes trivial warnings
about unused variables, labels and other lint.
1998-10-25 17:44:59 +00:00
Doug Rabson
84bc104b8e Don't call DEVICE_DETACH directly, always go through the device_detach()
wrapper which checks to make sure the device isn't currently open.
1998-10-03 08:55:29 +00:00
Bruce Evans
a8b8bc0730 Fixed recently perpetrated printf format errors. 1998-09-05 13:24:39 +00:00
Doug Rabson
0bf030847d Add some very simple support for a compiled in (from config(8)) resource
database.
1998-07-22 08:35:52 +00:00
Doug Rabson
45c95fa1d6 Change interrupt api to be closer to intr_create/intr_connect. 1998-07-12 16:20:52 +00:00
Doug Rabson
99d11cde56 Major changes to the generic device framework for FreeBSD/alpha:
* Eliminate bus_t and make it possible for all devices to have
  attached children.

* Support dynamically extendable interfaces for drivers to replace
  both the function pointers in driver_t and bus_ops_t (which has been
  removed entirely.  Two system defined interfaces have been defined,
  'device' which is mandatory for all devices and 'bus' which is
  recommended for all devices which support attached children.

* In addition, the alpha port defines two simple interfaces 'clock'
  for attaching various real time clocks to the system and 'mcclock'
  for the many different variations of mc146818 clocks which can be
  attached to different alpha platforms.  This eliminates two more
  function pointer tables in favour of the generic method dispatch
  system provided by the device framework.

Future device interfaces may include:

* cdev and bdev interfaces for devfs to use in replacement for specfs
  and the fixed interfaces bdevsw and cdevsw.

* scsi interface to replace struct scsi_adapter (not sure how this
  works in CAM but I imagine there is something similar there).

* various tailored interfaces for different bus types such as pci,
  isa, pccard etc.
1998-06-14 13:46:10 +00:00
Doug Rabson
897cd717a5 Add initial support for the FreeBSD/alpha kernel. This is very much a
work in progress and has never booted a real machine.  Initial
development and testing was done using SimOS (see
http://simos.stanford.edu for details).  On the SimOS simulator, this
port successfully reaches single-user mode and has been tested with
loads as high as one copy of /bin/ls :-).

Obtained from: partly from NetBSD/alpha
1998-06-10 10:57:29 +00:00