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* Add locking to ppc and ppbus and mark the whole lot MPSAFE:jhb2009-01-211-49/+105
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - To avoid having a bunch of locks that end up always getting acquired as a group, give each ppc(4) device a mutex which it shares with all the child devices including ppbus(4), lpt(4), plip(4), etc. This mutex is then used for all the locking. - Rework the interrupt handling stuff yet again. Now ppbus drivers setup their interrupt handler during attach and tear it down during detach like most other drivers. ppbus(4) only invokes the interrupt handler of the device that currently owns the bus (if any) when an interrupt occurs, however. Also, interrupt handlers in general now accept their softc pointers as their argument rather than the device_t. Another feature of the ppbus interrupt handlers is that they are called with the parent ppc device's lock already held. This minimizes the number of lock operations during an interrupt. - Mark plip(4), lpt(4), pcfclock(4), ppi(4), vpo(4) MPSAFE. - lpbb(4) uses the ppc lock instead of Giant. - Other plip(4) changes: - Add a mutex to protect the global tables in plip(4) and free them on module unload. - Add a detach routine. - Split out the init/stop code from the ioctl routine into separate functions. - Other lpt(4) changes: - Use device_printf(). - Use a dedicated callout for the lptout timer. - Allocate the I/O buffers at attach and detach rather than during open and close as this simplifies the locking at the cost of 1024+32 bytes when the driver is attached. - Other ppi(4) changes: - Use an sx lock to serialize open and close. - Remove unused HADBUS flag. - Add a detach routine. - Use a malloc'd buffer for each read and write to avoid races with concurrent read/write. - Other pps(4) changes: - Use a callout rather than a callout handle with timeout(). - Conform to the new ppbus requirements (regular mutex, non-filter interrupt handler). pps(4) is probably going to have to become a standalone driver that doesn't use ppbus(4) to satisfy it's requirements for low latency as a result. - Use an sx lock to serialize open and close. - Other vpo(4) changes: - Use the parent ppc device's lock to create the CAM sim instead of Giant. - Other ppc(4) changes: - Fix ppc_isa's detach method to detach instead of calling attach. Tested by: no one :-(
* Various whitespace and style fixes.jhb2008-11-161-9/+9
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* Fix build breakage.jhb2008-10-221-1/+2
| | | | Pointy hat: jhb
* Several cleanups to remove the need for explicit unit numbers and a fewjhb2008-10-211-26/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | other fixes: - Add pointers back to device_t objects in softc structures instead of storing the unit and using devclass_get_device(). - Add 'lpbb', 'pcf', 'pps', and 'vpo' child devices to every 'ppbus' device instead of just the first one. - Store softc pointers in si_drv1 of character devices instead of pulling the unit number from the minor number and using devclass_get_softc() and devclass_get_device(). - Store the LP_BYPASS flag in si_drv2 instead of encoding it in the minor number. - Destroy character devices for lpt(4) when detaching the device. - Use bus_print_child_footer() instead of duplicating it in ppbus_print_child() and fix ppbus_print_child()'s return value. - Remove unused AVM ivar from ppbus. - Don't store the 'mode' ivar in the ppbus ivars since we always fetch it from the parent anyway. - Try to detach all the child devices before deleting them in ppbus_detach(). - Use pause() instead of a tsleep() on a dummy address when polling the ppbus. - Use if_printf() and device_printf() instead of explicit names with unit numbers. Silence on: current@
* Replace all calls to minor() with dev2unit().ed2008-09-271-5/+5
| | | | | | | | | | | | | | | After I removed all the unit2minor()/minor2unit() calls from the kernel yesterday, I realised calling minor() everywhere is quite confusing. Character devices now only have the ability to store a unit number, not a minor number. Remove the confusion by using dev2unit() everywhere. This commit could also be considered as a bug fix. A lot of drivers call minor(), while they should actually be calling dev2unit(). In -CURRENT this isn't a problem, but it turns out we never had any problem reports related to that issue in the past. I suspect not many people connect more than 256 pieces of the same hardware. Reviewed by: kib
* Rework the handling of interrupt handlers for children of ppc and ppbus:jhb2008-09-151-7/+3
| | | | | | | | | | | | | | | | | - Retire IVARs for passing IRQs around. Instead, ppbus and ppc now allow child devices to access the interrupt by via a rid 0 IRQ resource using bus_alloc_resource_any(). - ppc creates its own interrupt event to manage the interrupt handlers of child devices. ppc does not allow child devices to use filters. It could allow this if needed, but none of the current drivers use them and it adds a good bit of complication. It uses intr_event_execute_handlers() to fire the child device interrupt handlers from its threaded interrupt handler. - Remove the ppbus_dummy_intr() hack. Now the ppc device always has an interrupt handler registered and we no longer bounce all the way up to nexus to manage adding/removing ppbus child interrupt handlers. Instead, the child handlers are added and removed to the private interrupt event in the ppc device.
* Catchup with filtersimp2007-02-231-2/+3
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* - Use bus_setup_intr() and bus_teardown_intr() to register device driverjhb2006-02-221-2/+2
| | | | | | | | | | interrupt handlers rather than BUS_SETUP_INTR() and BUS_TEARDOWN_INTR(). Uses of the BUS_*() versions in the implementation of foo_intr methods in bus drivers were not changed. Mostly this just means that some drivers might start printing diagnostic messages like [FAST] when appropriate as well as honoring mpsafenet=0. - Fix two more of the ppbus drivers' identify routines to function correctly in the mythical case of a machine with more than one ppbus.
* Add missing MODULE_DEPEND() so that ppbus.ko and these .ko's can beru2005-12-211-0/+1
| | | | loaded dynamically.
* Do not bzero() the softc, as newbus does it for us.cognet2004-07-091-1/+0
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* Do the dreaded s/dev_t/struct cdev */phk2004-06-161-5/+5
| | | | Bump __FreeBSD_version accordingly.
* Prevent the strange situation that after each load/unload of a ppbusguido2004-03-181-1/+5
| | | | | | | | | | | | | | | device, the device is probed multiple times (so each device is detected N times after unloading/loading the module N-1 times). The real fix is (quote Doug and Warner): > : In an ideal world, there should be some kind of BUS_UNIDENTIFY method > : which a driver could use to delete the devices it created in > : BUS_IDENTIFY. > > Or the bus would have a driver deleted routine that got called and it > would remove all instances of the devclass attached to it. Reviewed by: Doug Rabson & Warner Losh
* Device megapatch 4/6:phk2004-02-211-0/+2
| | | | | | | | Introduce d_version field in struct cdevsw, this must always be initialized to D_VERSION. Flip sense of D_NOGIANT flag to D_NEEDGIANT, this involves removing four D_NOGIANT flags and adding 145 D_NEEDGIANT flags.
* Device megapatch 1/6:phk2004-02-211-2/+0
| | | | | | | Free approx 86 major numbers with a mostly automatically generated patch. A number of strategic drivers have been left behind by caution, and a few because they still (ab)use their major number.
* Use __FBSDID().obrien2003-08-241-1/+3
| | | | Also some minor style cleanups.
* Gigacommit to improve device-driver source compatibility betweenphk2003-03-031-13/+7
| | | | | | | | | | | | | branches: Initialize struct cdevsw using C99 sparse initializtion and remove all initializations to default values. This patch is automatically generated and has been tested by compiling LINT with all the fields in struct cdevsw in reverse order on alpha, sparc64 and i386. Approved by: re(scottl)
* Fix typos, mostly s/ an / a / where appropriate and a few s/an/and/schweikh2002-12-301-13/+13
| | | | Add FreeBSD Id tag where missing.
* Replace various spelling with FALLTHROUGH which is lint()ablecharnier2002-08-251-1/+1
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* This makes ppbus childs like lpt and ppi succesfully connect to moreticso2002-04-071-1/+1
| | | | | | | | than just the first ppbus. The child drivers always tried to attach unit 0. Reviewed by: gallatin Approved by: gallatin
* KSE Milestone 2julian2001-09-121-3/+3
| | | | | | | | | | | | | | Note ALL MODULES MUST BE RECOMPILED make the kernel aware that there are smaller units of scheduling than the process. (but only allow one thread per process at this time). This is functionally equivalent to teh previousl -current except that there is a thread associated with each process. Sorry john! (your next MFC will be a doosie!) Reviewed by: peter@freebsd.org, dillon@freebsd.org X-MFC after: ha ha ha ha
* Send the remains (such as I have located) of "block major numbers" tophk2001-03-261-1/+0
| | | | the bit-bucket.
* Remove unneeded #include <machine/clock.h>phk2000-10-151-1/+0
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* Remove an unused variable warning.n_hibma2000-07-181-2/+0
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* If PERIPH_1284 is not defined, don't even bother calling the BUS_*_INTRn_hibma2000-05-071-9/+15
| | | | | | | | | | functions. If it is defined, check whether bus_alloc_resource has succeeded. If it hasn't, it is in polled mode. Mike Nowlin reports that this change makes the geek port (whatever _that_ is :-) work again on his machine. Submitted by: Mike Nowlin <mike@argos.org>
* If we can't allocate an IRQ resource, fail in the attach routine.jlemon2000-04-071-0/+4
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* Some newbus-inspired tidy-ups. Use device_identify() rather than scanningpeter2000-01-231-28/+21
| | | | | | | | | | | | the resource table to locate children. The 'at ppbus?' can go again. Remove a few #if Nxxx > 0' type things, config arranges this for us. Move the newbus method glue next to the DRIVER_MODULE() stuff so we don't need extra prototypes. Don't set device descriptions until after the possibility of the probe returning an error. Remove all cdevsw_add() calls, all the drivers that did this also use make_dev() correctly, so it's not required. A couple of other minor nits.
* Make this compile - missing ")";peter2000-01-141-1/+1
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* ppi needs to use a bus method to get this rather than peering inside thensouch2000-01-141-2/+2
| | | | | | 1284 stuff. Submitted by: Peter Wemm <peter@netplex.com.au>
* Port of ppbus standalone framework to the newbus system.nsouch2000-01-141-109/+139
| | | | | | | | | | | | | | | | | | | | | Note1: the correct interrupt level is invoked correctly for each driver. For this purpose, drivers request the bus before being able to call BUS_SETUP_INTR and BUS_TEARDOWN_INTR call is forced by the ppbus core when drivers release it. Thus, when BUS_SETUP_INTR is called at ppbus driver level, ppbus checks that the caller owns the bus and stores the interrupt handler cookie (in order to unregister it later). Printing is impossible while plip link is up is still TRUE. vpo (ZIP driver) and lpt are make in such a way that using the ZIP and printing concurrently is permitted is also TRUE. Note2: specific chipset detection is not done by default. PPC_PROBE_CHIPSET is now needed to force chipset detection. If set, the flags 0x40 still avoid detection at boot. Port of the pcf(4) driver to the newbus system (was previously directly connected to the rootbus and attached by a bogus pcf_isa_probe function).
* Remove five now unused fields from struct cdevsw. They should neverphk1999-09-251-5/+0
| | | | | | | | have been there in the first place. A GENERIC kernel shrinks almost 1k. Add a slightly different safetybelt under nostop for tty drivers. Add some missing FreeBSD tags
* $Id$ -> $FreeBSD$peter1999-08-281-1/+1
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* Simplify cdevsw registration.phk1999-05-311-16/+5
| | | | | | | | | | | | | | | | | | | | | | | | | The cdevsw_add() function now finds the major number(s) in the struct cdevsw passed to it. cdevsw_add_generic() is no longer needed, cdevsw_add() does the same thing. cdevsw_add() will print an message if the d_maj field looks bogus. Remove nblkdev and nchrdev variables. Most places they were used bogusly. Instead check a dev_t for validity by seeing if devsw() or bdevsw() returns NULL. Move bdevsw() and devsw() functions to kern/kern_conf.c Bump __FreeBSD_version to 400006 This commit removes: 72 bogus makedev() calls 26 bogus SYSINIT functions if_xe.c bogusly accessed cdevsw[], author/maintainer please fix. I4b and vinum not changed. Patches emailed to authors. LINT probably broken until they catch up.
* This commit should be a extensive NO-OP:phk1999-05-301-5/+22
| | | | | | | | | | | | | Reformat and initialize correctly all "struct cdevsw". Initialize the d_maj and d_bmaj fields. The d_reset field was not removed, although it is never used. I used a program to do most of this, so all the files now use the same consistent format. Please keep it that way. Vinum and i4b not modified, patches emailed to respective authors.
* s/static foo_devsw_installed = 0;/static int foo_devsw_installed;/.dt1999-04-281-2/+2
| | | | (Edited automatically)
* Rename nlpt to lpt.nsouch1999-02-141-44/+1
| | | | | Remove from ppi.c the old depreciated module stuff. Print info when if_plip can't use interrupts.
* Distinguish EPP address/data register. Add EPP address register access to ppi.nsouch1999-01-301-5/+12
| | | | | | | | Change microseq offsets. Previously, offsets of the program counter where added to the index of the current microinstruction. Make them rely on the index of the next executed microinstruction. Suggested by: Luigi Rizzo <luigi@labinfo.iet.unipi.it>
* Fix warnings in preparation for adding -Wall -Wcast-qual to thedillon1999-01-271-2/+2
| | | | kernel compile
* Major ppbus commit with:nsouch1999-01-101-8/+314
| | | | | | | | | | | | | | | | | | | + ECP parallel port chipset FIFO detection + DMA+FIFO parallel I/O handled as chipset specific + nlpt updated in order to use the above enhanced parallel I/O. Use 'lptcontrol -e' to use enhanced I/O + Various options documented in LINT + Full IEEE1284 NIBBLE and BYTE modes support. See ppbus(4) for an overview of the IEEE1284 standard + Detection of PnP parallel devices at boot + Read capability added to nlpt driver to get IEEE1284 compliant printer status with a simple 'cat /dev/lpt0' + IEEE1284 peripheral emulation added to BYTE mode. Two computers may dialog according to IEEE1284 signaling method. See PERIPH_1284 option and /sys/dev/ppbus/ppi.c All this code is supposed to provide basic functions for IEEE1284 programming. ppi.c and nlpt.c may act as examples.
* The "easy" fixes for compiling the kernel -Wunused: remove unreferenced staticarchie1998-12-071-3/+1
| | | | and local variables, goto labels, and functions declared but not defined.
* This commit fixes various 64bit portability problems required fordfr1998-06-071-2/+2
| | | | | | | | | | FreeBSD/alpha. The most significant item is to change the command argument to ioctl functions from int to u_long. This change brings us inline with various other BSD versions. Driver writers may like to use (__FreeBSD_version == 300003) to detect this change. The prototype FreeBSD/alpha machdep will follow in a couple of days time.
* Actually implement the internals of the 'ppi' device.msmith1998-01-021-12/+77
| | | | | | It is now possible to control the various parallel port signals from user-space programs without having to resort to opening /dev/io directly.
* Removed unused #includes. The !KERNEL case may be more broken than before.bde1997-09-011-18/+1
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* Remove bogus i386/* includes.msmith1997-08-281-4/+1
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* Use cdev major 82 instead of the (reserved-for-local-use) original 14msmith1997-08-161-3/+3
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* Sync with ppbus-970815 from the author :msmith1997-08-161-10/+73
| | | | | | | | | - interrupt-driven printing now works (nlpt) - Rearrangement of bus-related functions into ppb_base/ppbconf - Addition of ieee1284 interface functions, preliminary parallel-port PnP support Submitted by: Nicolas Souchu <Nicolas.Souchu@prism.uvsq.fr>
* New directory and drivers for Parallel Port Bus devices.msmith1997-08-141-0/+172
Submitted by: Nicolas Souchu <Nicolas.Souchu@prism.uvsq.fr>
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