Commit Graph

43 Commits

Author SHA1 Message Date
jhb
2698863029 Add a BUS_CHILD_DELETED() method that a bus can hook to allow it to cleanup
any bus-specific state (such as ivars) when a child device is deleted.

Requested by:	kan
MFC after:	1 month
2012-08-21 18:13:09 +00:00
jhb
deafe4e593 Add a new bus method, BUS_ADJUST_RESOURCE() that is intended to be a
wrapper around rman_adjust_resource().  Include a generic implementation,
bus_generic_adjust_resource() which passes the request up to the parent
bus.  There is currently no default implementation.  A
bus_adjust_resource() wrapper is provided for use in drivers.
2011-04-29 21:36:45 +00:00
avg
ab04d6fe3f bus_add_child: add specialized default implementation that calls panic
If a kobj method doesn't have any explicitly provided default
implementation, then it is auto-assigned kobj_error_method.
kobj_error_method is proper only for methods that return error code,
because it just returns ENXIO.
So, in the case of unimplemented bus_add_child caller would get
(device_t)ENXIO as a return value, which would cause the mistake to go
unnoticed, because return value is typically checked for NULL.
Thus, a specialized null_add_child is added.  It would have sufficied
for correctness to return NULL, but this type of mistake was deemed to
be rare and serious enough to call panic instead.

Watch out for this kind of problem with other kobj methods.

Suggested by:	jhb, imp
MFC after:	2 weeks
2010-09-13 08:34:20 +00:00
avg
c9fe8ad7f0 bus_add_child: change type of order parameter to u_int
This reflects actual type used to store and compare child device orders.
Change is mostly done via a Coccinelle (soon to be devel/coccinelle)
semantic patch.
Verified by LINT+modules kernel builds.

Followup to:	r212213
MFC after:	10 days
2010-09-10 11:19:03 +00:00
mav
ea954fa396 Virtualize pci_remap_msi_irq() call from general MSI code. It allows MSI
(FSB interrupts) to be used by non-PCI devices, such as HPET.
2010-06-14 07:10:37 +00:00
jhb
45688ed39d Add a facility for associating optional descriptions with active interrupt
handlers.  This is primarily intended as a way to allow devices that use
multiple interrupts (e.g. MSI) to meaningfully distinguish the various
interrupt handlers.
- Add a new BUS_DESCRIBE_INTR() method to the bus interface to associate
  a description with an active interrupt handler setup by BUS_SETUP_INTR.
  It has a default method (bus_generic_describe_intr()) which simply passes
  the request up to the parent device.
- Add a bus_describe_intr() wrapper around BUS_DESCRIBE_INTR() that supports
  printf(9) style formatting using var args.
- Reserve MAXCOMLEN bytes in the intr_handler structure to hold the name of
  an interrupt handler and copy the name passed to intr_event_add_handler()
  into that buffer instead of just saving the pointer to the name.
- Add a new intr_event_describe_handler() which appends a description string
  to an interrupt handler's name.
- Implement support for interrupt descriptions on amd64 and i386 by having
  the nexus(4) driver supply a custom bus_describe_intr method that invokes
  a new intr_describe() MD routine which in turn looks up the associated
  interrupt event and invokes intr_event_describe_handler().

Requested by:	many
Reviewed by:	scottl
MFC after:	2 weeks
2009-10-15 14:54:35 +00:00
jhb
77373ed468 Add support for multiple passes of the device tree during the boot-time
probe.  The current device order is unchanged.  This commit just adds the
infrastructure and ABI changes so that it is easier to merge later changes
into 8.x.
- Driver attachments now have an associated pass level.  Attachments are
  not allowed to probe or attach to drivers until the system-wide pass level
  is >= the attachment's pass level.  By default driver attachments use the
  "last" pass level (BUS_PASS_DEFAULT).  Driver's that wish to probe during
  an earlier pass use EARLY_DRIVER_MODULE() instead of DRIVER_MODULE() which
  accepts the pass level as an additional parameter.
- A new method BUS_NEW_PASS has been added to the bus interface.  This
  method is invoked when the system-wide pass level is changed to kick off
  a rescan of the device tree so that drivers that have just been made
  "eligible" can probe and attach.
- The bus_generic_new_pass() function provides a default implementation of
  BUS_NEW_PASS().  It first allows drivers that were just made eligible for
  this pass to identify new child devices.  Then it propogates the rescan to
  child devices that already have an attached driver by invoking their
  BUS_NEW_PASS() method.  It also reprobes devices without a driver.
- BUS_PROBE_NOMATCH() is only invoked for devices that do not have
  an attached driver after being scanned during the final pass.
- The bus_set_pass() function is used during boot to raise the pass level.
  Currently it is only called once during root_bus_configure() to raise
  the pass level to BUS_PASS_DEFAULT.  This has the effect of probing all
  devices in a single pass identical to previous behavior.

Reviewed by:	imp
Approved by:	re (kib)
2009-06-09 14:26:23 +00:00
jhb
c2251260be Allow device hints to wire the unit numbers of devices.
- An "at" hint now reserves a device name.
- A new BUS_HINT_DEVICE_UNIT method is added to the bus interface.  When
  determining the unit number of a device, this method is invoked to
  let the bus driver specify the unit of a device given a specific
  devclass.  This is the only way a device can be given a name reserved
  via an "at" hint.
- Implement BUS_HINT_DEVICE_UNIT() for the acpi(4) and isa(4) bus drivers.
  Both of these busses implement this by comparing the resources for a
  given hint device with the resources enumerated by ACPI/PnPBIOS and
  wire a unit if the hint resources are a subset of the "real" resources.
- Use bus_hinted_children() for adding hinted devices on isa(4) busses
  now instead of doing it by hand.
- Remove the unit kludging from sio(4) as it is no longer necessary.

Prodding from:	peter, imp
OK'd by:	marcel
MFC after:	1 month
2008-11-18 21:01:54 +00:00
jhb
6cf6d7b22b Implement a BUS_BIND_INTR() method in the bus interface to bind an IRQ
resource to a CPU.  The default method is to pass the request up to the
parent similar to BUS_CONFIG_INTR() so that all busses don't have to
explicitly implement bus_bind_intr.  A bus_bind_intr(9) wrapper routine
similar to bus_setup/teardown_intr() is added for device drivers to use.
Unbinding an interrupt is done by binding it to NOCPU.  The IRQ resource
must be allocated, but it can happen in any order with respect to
bus_setup_intr().  Currently it is only supported on amd64 and i386 via
nexus(4) methods that simply call the intr_bind() routine.

Tested by:	gallatin
2008-03-20 21:24:32 +00:00
piso
6a2ffa86e5 o break newbus api: add a new argument of type driver_filter_t to
bus_setup_intr()

o add an int return code to all fast handlers

o retire INTR_FAST/IH_FAST

For more info: http://docs.freebsd.org/cgi/getmsg.cgi?fetch=465712+0+current/freebsd-current

Reviewed by: many
Approved by: re@
2007-02-23 12:19:07 +00:00
jhb
c74e70f7a8 - Revert making bus_generic_add_child() the default for BUS_ADD_CHILD().
Instead, we want busses to explicitly specify an add_child routine if they
  want to support identify routines, but by default disallow having outside
  drivers add devices.
- Give smbus(4) an explicit bus_add_child() method.

Requested by:	imp
2006-09-11 22:20:37 +00:00
jhb
7be67f8a93 Add a default method for BUS_ADD_CHILD() that just calls
device_add_child_ordered().  Previously, a device driver that wanted to
add a new child device in its identify routine had to know if the parent
driver had a custom bus_add_child method and use BUS_ADD_CHILD() in that
case, otherwise use device_add_child().  Getting it wrong in either
direction would result in panics or failure to add the child device.  Now,
BUS_ADD_CHILD() always works isolating child drivers from having to know
intimate details about the parent driver.

Discussed with:	imp
MFC after:	1 week
2006-09-11 19:41:31 +00:00
jmg
c25fb06d92 add a newbus method for obtaining the bus's bus_dma_tag_t... This is
required by arches like sparc64 (not yet implemented) and sun4v where there
are seperate IOMMU's for each PCI bus...  For all other arches, it will
end up returning NULL, which makes it a no-op...

Convert a few drivers (the ones we've been working w/ on sun4v) to the
new convection...  Eventually all drivers will need to replace the parent
tag of NULL, w/ bus_get_dma_tag(dev), though dev is usually different for
each driver, and will require hand inspection...

Reviewed by:	scottl (earlier version)
2006-09-03 00:27:42 +00:00
imp
f7c9fd2027 Create bus_enumerate_hinted_children. This routine will allow drivers
to use the hinted child system.  Bus drivers that use this need to
implmenet the bus_hinted_child method, where they actually add the
child to their bus, as they see fit.  The bus is repsonsible for
getting the attribtues for the child, adding it in the right order,
etc.  ISA hinting will be updated to use this method.

MFC After: 3 days
2006-07-08 17:06:15 +00:00
imp
20280f1431 /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
imp
482740a238 Minor formatting fixes for lines > 80 characters 2004-08-12 17:26:22 +00:00
dfr
030de024cc Add doxygen doc comments for most of newbus and the BUS interface. 2004-07-18 16:30:31 +00:00
marcel
5b71626790 Introduce BUS_CONFIG_INTR(). The method allows devices to tell parents
about interrupt trigger mode and interrupt polarity. This allows ACPI
for example to pass interrupt resource information up the hierarchy.
The default implementation of the method therefore is to pass the
request to the parent.

Reviewed by: jhb, njl
2003-09-10 21:37:10 +00:00
mdodd
fe36e1c847 Give print_child a default method. 2003-03-25 04:32:52 +00:00
imp
b88d741bf8 Add two interfaces to allow for busses to report the pnpinfo for
devices as well as their location on the bus.
2002-10-07 05:06:38 +00:00
imp
2ded912cbd Clarify the return value from child_present. 2002-09-11 04:22:10 +00:00
imp
30ec4e7272 Add bus_child_present and the child_present method to bus_if.m 2002-07-21 03:28:43 +00:00
markm
b0c0526342 Use protected names (_foo) to cutdown on boatloads of lint warnings. 2002-04-21 11:16:10 +00:00
bde
cd522c5374 "Fixed" -Wshadow warnings by changing the name of some function parameters
from `index' to `indx'.  The correct fix would be to not support or use
index().
2002-03-27 04:04:17 +00:00
mdodd
c18bb8265f Alter the return value and arguments of the GET_RESOURCE_LIST bus method.
Alter consumers of this method to conform to the new convention.
Minor cosmetic adjustments to bus.h.

This isn't of concern as this interface isn't in use yet.
2000-11-28 06:49:15 +00:00
mdodd
2754d6b4a3 Add new bus method 'GET_RESOURCE_LIST' and appropriate generic
implementation.

Add bus_generic_rl_{get,set,delete,release,alloc}_resource() functions
which provide generic operations for devices using resource list style
resource management.

This should simplify a number of bus drivers.  Further commits to follow.
2000-10-18 05:15:40 +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
dfr
229cdb9144 * Add struct resource_list* argument to resource_list_alloc and
resource_list_release. This removes the dependancy on the
  layout of ivars.

* Move set_resource, get_resource and delete_resource from
  isa_if.m to bus_if.m.

* Simplify driver code by providing wrappers to those methods:

     bus_set_resource(dev, type, rid, start, count);
     bus_get_resource(dev, type, rid, startp, countp);
     bus_get_resource_start(dev, type, rid);
     bus_get_resource_count(dev, type, rid);
     bus_delete_resource(dev, type, rid);

* Delete isa_get_rsrc and use bus_get_resource_start instead.

* Fix a stupid typo in isa_alloc_resource reported by Takahashi
  Yoshihiro <nyan@FreeBSD.org>.

* Print a diagnostic message if we can't assign resources to a PnP
  device.

* Change device_print_prettyname() so that it doesn't print
  "(no driver assigned)-1" for anonymous devices.
1999-10-12 21:35:51 +00:00
imp
117aa238f6 Call DEVICE_IDENIFY in bus_generic_driver_added to allow devices to
add nodes to the tree.  Also, default to bus_generic_driver_added for
the BUS_DRIVER_ADDED method.

This allows newbus busses to be kldload'd.

Reviewed by: dfr
1999-10-09 03:48:18 +00:00
peter
3b842d34e8 $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
mdodd
1b3328c300 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
dfr
064ed23661 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
dfr
c10ae458eb * 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
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
dfr
e4989c23fe 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
087d4857e5 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
dfr
e92e9c75bf 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
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
f8540e5030 Add semicolon to INTERFACE declaration. 1998-11-08 18:51:38 +00:00
dfr
73a17d1eaf Document BUS_CREATE_INTR and BUS_CONNECT_INTR. 1998-09-16 08:25:56 +00:00
dfr
33ad41510d Change interrupt api to be closer to intr_create/intr_connect. 1998-07-12 16:20:52 +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