Commit Graph

11 Commits

Author SHA1 Message Date
imp
58871563b4 Implement device_quiesce. This method means 'you are about to be
unloaded, cleanup, or return ebusy of that's inconvenient.'  The
default module hanlder for newbus will now call this when we get a
MOD_QUIESCE event, but in the future may call this at other times.

This shouldn't change any actual behavior until drivers start to use it.
2004-12-31 20:47:51 +00:00
imp
482740a238 Minor formatting fixes for lines > 80 characters 2004-08-12 17:26:22 +00:00
dfr
2ada7916d4 Expand and rewrite documentation using doxygen markup so that we can
generate funky web pages from it.
2004-07-11 16:17:42 +00:00
dfr
c9bf4be3c2 * Factor out the object system from new-bus so that it can be used by
non-device code.
* Re-implement the method dispatch to improve efficiency. The new system
  takes about 40ns for a method dispatch on a 300Mhz PII which is only
  10ns slower than a direct function call on the same hardware.

This changes the new-bus ABI slightly so make sure you re-compile any
driver modules which you use.
2000-04-08 14:17:18 +00:00
peter
3b842d34e8 $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
n_hibma
015d2f3ea8 Update the comments on values than can be returned by DEVICE_PROBE.
DEVICE_PROBE can return priorities.

Reviewed by:	Doug Rabson <dfr@nlsystems.com>
1999-06-17 19:22:12 +00:00
dfr
8a8a702dc2 * 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
dfr
1a3fdb21c5 * 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
wollman
2f0e3424ed 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
nsouch
1f9c4b34fd Add semicolon to INTERFACE declarations 1998-11-08 18:35:53 +00:00
dfr
037452c745 [Add missing files from previous commit]
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 13:53:12 +00:00