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* MFC: Split struct ithd into struct intr_thread and intr_event andJohn Baldwin2006-03-101-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | associated changes. More details below: Remove public declarations of variables that were forgotten when they were made static. Revision Changes Path 1.31 +0 -1 src/sys/sys/interrupt.h Make sure the interrupt is masked before processing it, or bad things can happen. Revision Changes Path 1.10 +3 -3 src/sys/arm/arm/intr.c Reorganize the interrupt handling code a bit to make a few things cleaner and increase flexibility to allow various different approaches to be tried in the future. - Split struct ithd up into two pieces. struct intr_event holds the list of interrupt handlers associated with interrupt sources. struct intr_thread contains the data relative to an interrupt thread. Currently we still provide a 1:1 relationship of events to threads with the exception that events only have an associated thread if there is at least one threaded interrupt handler attached to the event. This means that on x86 we no longer have 4 bazillion interrupt threads with no handlers. It also means that interrupt events with only INTR_FAST handlers no longer have an associated thread either. - Renamed struct intrhand to struct intr_handler to follow the struct intr_foo naming convention. This did require renaming the powerpc MD struct intr_handler to struct ppc_intr_handler. - INTR_FAST no longer implies INTR_EXCL on all architectures except for powerpc. This means that multiple INTR_FAST handlers can attach to the same interrupt and that INTR_FAST and non-INTR_FAST handlers can attach to the same interrupt. Sharing INTR_FAST handlers may not always be desirable, but having sio(4) and uhci(4) fight over an IRQ isn't fun either. Drivers can always still use INTR_EXCL to ask for an interrupt exclusively. The way this sharing works is that when an interrupt comes in, all the INTR_FAST handlers are executed first, and if any threaded handlers exist, the interrupt thread is scheduled afterwards. This type of layout also makes it possible to investigate using interrupt filters ala OS X where the filter determines whether or not its companion threaded handler should run. - Aside from the INTR_FAST changes above, the impact on MD interrupt code is mostly just 's/ithread/intr_event/'. - A new MI ddb command 'show intrs' walks the list of interrupt events dumping their state. It also has a '/v' verbose switch which dumps info about all of the handlers attached to each event. - We currently don't destroy an interrupt thread when the last threaded handler is removed because it would suck for things like ppbus(8)'s braindead behavior. The code is present, though, it is just under #if 0 for now. - Move the code to actually execute the threaded handlers for an interrrupt event into a separate function so that ithread_loop() becomes more readable. Previously this code was all in the middle of ithread_loop() and indented halfway across the screen. - Made struct intr_thread private to kern_intr.c and replaced td_ithd with a thread private flag TDP_ITHREAD. - In statclock, check curthread against idlethread directly rather than curthread's proc against idlethread's proc. (Not really related to intr changes) Tested on: alpha, amd64, i386, sparc64 Tested on: arm, ia64 (older version of patch by cognet and marcel) Revision Changes Path 1.88 +43 -29 src/sys/alpha/alpha/interrupt.c 1.38 +5 -5 src/sys/alpha/isa/isa.c 1.16 +58 -52 src/sys/amd64/amd64/intr_machdep.c 1.6 +1 -1 src/sys/amd64/include/intr_machdep.h 1.16 +2 -2 src/sys/amd64/isa/atpic.c 1.11 +28 -22 src/sys/arm/arm/intr.c 1.462 +2 -2 src/sys/dev/sio/sio.c 1.6 +1 -1 src/sys/dev/uart/uart_kbd_sun.c 1.24 +2 -2 src/sys/dev/uart/uart_tty.c 1.15 +58 -52 src/sys/i386/i386/intr_machdep.c 1.8 +1 -1 src/sys/i386/include/intr_machdep.h 1.21 +2 -2 src/sys/i386/isa/atpic.c 1.52 +32 -25 src/sys/ia64/ia64/interrupt.c 1.180 +3 -2 src/sys/kern/kern_clock.c 1.127 +437 -270 src/sys/kern/kern_intr.c 1.206 +0 -1 src/sys/kern/subr_witness.c 1.6 +3 -3 src/sys/powerpc/include/intr_machdep.h 1.7 +35 -32 src/sys/powerpc/powerpc/intr_machdep.c 1.14 +1 -1 src/sys/sparc64/include/intr_machdep.h 1.24 +43 -36 src/sys/sparc64/sparc64/intr_machdep.c 1.32 +36 -36 src/sys/sys/interrupt.h 1.440 +1 -3 src/sys/sys/proc.h Catch up with interrupt-thread changes. Revision Changes Path 1.32 +1 -1 src/sys/dev/zs/zs.c Catch up with new interrupt handling code. Revision Changes Path 1.16 +3 -3 src/sys/netgraph/bluetooth/drivers/bt3c/ng_bt3c_pccard.c Catch up with new interrupt handling code. Revision Changes Path 1.162 +2 -2 src/sys/dev/cy/cy.c 1.101 +2 -2 src/sys/dev/rc/rc.c Catch up with new interrupt handling code. Revision Changes Path 1.50 +2 -2 src/sys/dev/cx/if_cx.c 1.41 +1 -1 src/sys/dev/sab/sab.c 1.238 +2 -2 src/sys/pc98/cbus/sio.c Add a swi_remove() function to teardown software interrupt handlers. For now it just calls intr_event_remove_handler(), but at some point it might also be responsible for tearing down interrupt events created via swi_add. Revision Changes Path 1.128 +17 -0 src/sys/kern/kern_intr.c 1.33 +1 -0 src/sys/sys/interrupt.h - Use swi_remove() to teardown swi handlers rather than intr_event_remove_handler(). - Remove tty: prefix from a couple of swi handler names. Revision Changes Path 1.51 +1 -1 src/sys/dev/cx/if_cx.c 1.102 +2 -2 src/sys/dev/rc/rc.c 1.42 +1 -1 src/sys/dev/sab/sab.c 1.25 +1 -1 src/sys/dev/uart/uart_tty.c 1.33 +1 -1 src/sys/dev/zs/zs.c 1.17 +2 -2 src/sys/netgraph/bluetooth/drivers/bt3c/ng_bt3c_pccard.c Remove a stray return statement in the interrupt dispatch function that caused a premature exit after calling a fast interrupt handler and bypassing a much needed critical_exit() and the scheduling of the interrupt thread for non-fast handlers. In short: unbreak :-) Revision Changes Path 1.53 +0 -1 src/sys/ia64/ia64/interrupt.c If we get a stray interrupt, return after logging it. In the extremely rare case of a stray interrupt to an unregistered source (such as a stray interrupt from the 8259As when using APIC), this could result in a page fault when it tried to walk the list of interrupt handlers to execute INTR_FAST handlers. This bug was introduced with the intr_event changes, so it's not present in 5.x or 6.x. Submitted by: Mark Tinguely tinguely at casselton dot net Revision Changes Path 1.17 +1 -0 src/sys/amd64/amd64/intr_machdep.c 1.16 +1 -0 src/sys/i386/i386/intr_machdep.c Approved by: re (scottl) Notes: svn path=/stable/6/; revision=156543
* Remove bus_{mem,p}io.h and related code for a micro-optimization on i386Yoshihiro Takahashi2005-05-295-5/+0
| | | | | | | | | and amd64. The optimization is a trivial on recent machines. Reviewed by: -arch (imp, marcel, dfr) Notes: svn path=/head/; revision=146734
* Oops, revert a commit that snuck in with the earlier critical sectionJohn Baldwin2005-04-051-1/+0
| | | | | | | | | changes. Noticed by: bde Notes: svn path=/head/; revision=144677
* Divorce critical sections from spinlocks. Critical sections as denoted byJohn Baldwin2005-04-041-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | critical_enter() and critical_exit() are now solely a mechanism for deferring kernel preemptions. They no longer have any affect on interrupts. This means that standalone critical sections are now very cheap as they are simply unlocked integer increments and decrements for the common case. Spin mutexes now use a separate KPI implemented in MD code: spinlock_enter() and spinlock_exit(). This KPI is responsible for providing whatever MD guarantees are needed to ensure that a thread holding a spin lock won't be preempted by any other code that will try to lock the same lock. For now all archs continue to block interrupts in a "spinlock section" as they did formerly in all critical sections. Note that I've also taken this opportunity to push a few things into MD code rather than MI. For example, critical_fork_exit() no longer exists. Instead, MD code ensures that new threads have the correct state when they are created. Also, we no longer try to fixup the idlethreads for APs in MI code. Instead, each arch sets the initial curthread and adjusts the state of the idle thread it borrows in order to perform the initial context switch. This change is largely a big NOP, but the cleaner separation it provides will allow for more efficient alternative locking schemes in other parts of the kernel (bare critical sections rather than per-CPU spin mutexes for per-CPU data for example). Reviewed by: grehan, cognet, arch@, others Tested on: i386, alpha, sparc64, powerpc, arm, possibly more Notes: svn path=/head/; revision=144637
* Simplify the "and if we're in the debugger, don't use locks" logic,Robert Watson2005-02-081-9/+5
| | | | | | | | | correcting some misthinking. Discussed with (really this time): bde Notes: svn path=/head/; revision=141530
* When entering siocnputc() with (kdb_active), don't acquire (orRobert Watson2005-02-031-5/+9
| | | | | | | | | | | | | | release) the sio spin mutex, as use of synchronization primitives in the debugger can result in substantial problems. With this patch in place entering the debugger via a serial console is made substantially more reliable. MFC after: 1 week Tested by: kris Discussed with: bde Notes: svn path=/head/; revision=141186
* puc handles this card, so remove it from here.Warner Losh2005-01-111-1/+0
| | | | | | | PR: 48468 Notes: svn path=/head/; revision=140024
* Start each of the license/copyright comments with /*-, minor shuffle of linesWarner Losh2005-01-062-2/+2
| | | | Notes: svn path=/head/; revision=139749
* Remove local hacks to set flags now that the device probe does this for us.Nate Lawson2004-10-141-4/+0
| | | | | | | | | | Tested on every device except sio_pci and the pc98 fd.c. Perhaps something similar should be done for the "disabled" hints also. MFC after: 2 weeks Notes: svn path=/head/; revision=136520
* Use generic tty code instead of local stuff.Poul-Henning Kamp2004-10-131-521/+79
| | | | | | | NB: device names are now consistent: {cua,tty}d$(port)[.lock,.init] Notes: svn path=/head/; revision=136478
* Use ttyconsolemode() to set the console tty modes.Poul-Henning Kamp2004-10-121-8/+1
| | | | Notes: svn path=/head/; revision=136450
* MFpc98: Check a pointer is NULL, remove unused variable.Yoshihiro Takahashi2004-09-201-3/+4
| | | | Notes: svn path=/head/; revision=135516
* Fix an issue with ng_tty which (ab)used the tty->t_sc field which isPoul-Henning Kamp2004-09-171-4/+6
| | | | | | | | | reserved for the device drivers: Add a t_lsc field for line discipline private use. Notes: svn path=/head/; revision=135406
* Use ttyalloc() instead of ttymalloc(NULL)Poul-Henning Kamp2004-09-171-1/+1
| | | | Notes: svn path=/head/; revision=135367
* Allocate tty at attach time rather than open time.Poul-Henning Kamp2004-09-161-49/+43
| | | | | | | | | | | Use the init/lock*in/out fields in struct tty and remove them from our softc. Use tty->t_sc to find out softc when convenient. Mostly OK'ed by: bde Notes: svn path=/head/; revision=135329
* If you insert a pccard modem and then eject it, you get a panic. ThisWarner Losh2004-07-221-1/+2
| | | | | | | | | | happens because the sio device was never opened and com->tp is therefore NULL. ttygone can't swallow a NULL, so guard against that possibility. Other places in this function make similar checks, so I believe this is correct. Notes: svn path=/head/; revision=132561
* Preparation commit for the tty cleanups that will follow in the nearPoul-Henning Kamp2004-07-151-2/+2
| | | | | | | | | | | | future: rename ttyopen() -> tty_open() and ttyclose() -> tty_close(). We need the ttyopen() and ttyclose() for the new generic cdevsw functions for tty devices in order to have consistent naming. Notes: svn path=/head/; revision=132226
* Introduce ttygone() which indicates that the hardware is detached.Poul-Henning Kamp2004-07-111-38/+5
| | | | | | | Move dtrwait logic to the generic TTY level. Notes: svn path=/head/; revision=131981
* Update for the KDB framework. Sanitize the alpha console code now thatMarcel Moolenaar2004-07-101-209/+76
| | | | | | | | | | | | | | | | | | | | | it's in the way even more. Basicly: remove all alpha specific console support from gfb(4), sio(4) and syscons(4). Rewrite the alpha console initialization to be identical to all other platforms. In a nutshell: call cninit(). The platform specific code now only sets or clears RB_SERIAL and thus automaticly causes the right console to be selected. sio.c: o Replace the remote GDB hacks and use the GDB debug port interface instead. o Make debugging code conditional upon KDB instead of DDB. o Call kdb_alt_break() instead of db_alt_break(). o Call kdb_enter() instead of breakpoint(). o Remove the ugly compatibility of using the console as the debug port. Notes: svn path=/head/; revision=131939
* Define the tty methods as typedefs.Poul-Henning Kamp2004-06-301-3/+2
| | | | | | | | | Change the return type for t_break to void. Add t_ioctl (more about this later). Notes: svn path=/head/; revision=131373
* - Shorten the names for the TTY related swi interrupt handlers as theJohn Baldwin2004-06-281-2/+2
| | | | | | | | | | | 'tty:' prefix is largely redundant. - Fix the priority of the low-priority TTY SWIs that are hung off of the softclock thread. Submitted by: bde (2) Notes: svn path=/head/; revision=131242
* Guard against us having no tty pointer.Poul-Henning Kamp2004-06-271-1/+2
| | | | Notes: svn path=/head/; revision=131185
* Pick the hotchar out of the tty structure instead of caching privatePoul-Henning Kamp2004-06-261-6/+5
| | | | | | | | | | | copies. No current line disciplines have a dynamically changing hotchar, and expecting to receive anything sensible during a change in ldisc is insane so no locking of the hotchar field is necessary. Notes: svn path=/head/; revision=131134
* Use generic support for modemcontrol and BREAK ioctls.Poul-Henning Kamp2004-06-251-78/+63
| | | | Notes: svn path=/head/; revision=131094
* Remove the TIOCDCDTIMESTAMP option.Poul-Henning Kamp2004-06-221-12/+0
| | | | | | | | The RFC-2783 PPS-API (<sys/timepps.h>) provides better and more configurable service. Notes: svn path=/head/; revision=130938
* Put the pre FreeBSD-2.x tty compat code under BURN_BRIDGES.Poul-Henning Kamp2004-06-211-0/+4
| | | | Notes: svn path=/head/; revision=130892
* Give control devices their own cdevsw{} so that we can eliminate themPoul-Henning Kamp2004-06-211-51/+111
| | | | | | | | | from the trafic functions. Do not use com_addr() when we don't need it. Notes: svn path=/head/; revision=130872
* Do the dreaded s/dev_t/struct cdev */Poul-Henning Kamp2004-06-161-6/+6
| | | | | | | Bump __FreeBSD_version accordingly. Notes: svn path=/head/; revision=130585
* Deorbit COMPAT_SUNOS.Poul-Henning Kamp2004-06-111-2/+2
| | | | | | | | We inherited this from the sparc32 port of BSD4.4-Lite1. We have neither a sparc32 port nor a SunOS4.x compatibility desire these days. Notes: svn path=/head/; revision=130344
* Add an entry to the PCI ID list to support the serial interface on theBill Paul2004-06-071-0/+1
| | | | | | | | | Broadcom 802.11g/GPRS CardBus card. Submitted by: Yann Berthier yb at sainte-barbe dot org Notes: svn path=/head/; revision=130194
* Centralize the line discipline optimization determination in a functionPoul-Henning Kamp2004-06-041-24/+4
| | | | | | | | | | | | called ttyldoptim(). Use this function from all the relevant drivers. I belive no drivers finger linesw[] directly anymore, paving the way for locking and refcounting. Notes: svn path=/head/; revision=130096
* Manual edits to change linesw[]-frobbing to ttyld_*() calls.Poul-Henning Kamp2004-06-041-2/+2
| | | | Notes: svn path=/head/; revision=130095
* Machine generated patch which changes linedisc calls from accessingPoul-Henning Kamp2004-06-041-8/+8
| | | | | | | | | linesw[] directly to using the ttyld...() functions The ttyld...() functions ar inline so there is no performance hit. Notes: svn path=/head/; revision=130077
* Make the remaining serial drivers call ttyioctl() rather than callingPoul-Henning Kamp2004-06-041-8/+3
| | | | | | | the linedisc directly. Notes: svn path=/head/; revision=130057
* There is no need to explicitly call the stop function. In all likelyhoodPoul-Henning Kamp2004-06-011-1/+0
| | | | | | | ->l_close() did it and ttyclose certainly will. Notes: svn path=/head/; revision=129939
* There is no need to explicitly call ttwakeup() and ttwwakeup() afterPoul-Henning Kamp2004-06-011-2/+0
| | | | | | | | ttyclose() has been called. It's already been done once by ttyclose, and probably once by the line-discipline too. Notes: svn path=/head/; revision=129937
* ttyclose() increments t_gen. Remove redundant increments in drivers.Poul-Henning Kamp2004-06-011-1/+0
| | | | Notes: svn path=/head/; revision=129934
* Fix disordering of pccarddevs.h noticed by bde. Also remove a fewWarner Losh2004-05-271-2/+2
| | | | | | | | | redundant includes and fix some of the include disordering. Submitted by: bde Notes: svn path=/head/; revision=129764
* Move to generating pccarddevs.h on the fly, both for the kernel andWarner Losh2004-05-261-1/+1
| | | | | | | | | | the modules. Also generate usbdevs.h automatically now, but a non-kernel file is stopping that at the moment. Notes: svn path=/head/; revision=129740
* Remove new options and my prevention of system freeze when the sio probeDoug Ambrisko2004-05-031-74/+47
| | | | | | | | | | returns okay when HW probe fails. This happens when comconsole flag is set but VGA console is used instead. Back out requested by: bde (He will be looking at other solutions from scratch) Notes: svn path=/head/; revision=128899
* Some enhancements and bug fix.Doug Ambrisko2004-04-301-47/+74
| | | | | | | | | | | | | | | | | | | | | - Define option FORCECONSPEED to force the serial console to be CONSPEED. I've run into a lot of boards in which the detect for prior speed doesn't work and ends up with broken console since it is at the wrong speed. - If a serial port is marked as a console, but console=vidconsole and if the serial ports doesn't exist it will be probed and attached at a 8250 chip. Then writes to that will freeze the system. - Add an option flags 0x400000 to mark this as a potential comconsole in-case the one flaged with 0x10 does not exist in the system. This makes it easier to deploy on systems with one or two serial ports. Obtained from: IronPort Notes: svn path=/head/; revision=128781
* Remove the sio EBus attachment, which never worked with an unpatchedThomas Moestl2004-04-301-114/+0
| | | | | | | | driver because sio(4) uses ISA-specific functions. uart(4) has full support for the respective hardware and should be used instead. Notes: svn path=/head/; revision=128771
* Back out last bad commit (again!)Warner Losh2004-04-071-12/+1
| | | | Notes: svn path=/head/; revision=128020
* Remove advertising clause from University of California Regent'sWarner Losh2004-04-073-13/+12
| | | | | | | | | | license, per letter dated July 22, 1999 and email from Peter Wemm, Alan Cox and Robert Watson. Approved by: core, peter, alc, rwatson Notes: svn path=/head/; revision=128019
* Last change was a bogusWarner Losh2004-04-071-12/+1
| | | | Notes: svn path=/head/; revision=127979
* Remove advertising clause from University of California Regent'sWarner Losh2004-04-071-1/+12
| | | | | | | | | | license, per letter dated July 22, 1999 and email from Peter Wemm, Alan Cox and Robert Watson. Approved by: core, peter, alc, rwatson Notes: svn path=/head/; revision=127977
* Back out code for auto-gdb detection that accidentally leaked into theNate Lawson2004-03-181-17/+5
| | | | | | | | | | bus_alloc_resource_any commit. Submitted by: bde Pointy-hat: njl Notes: svn path=/head/; revision=127157
* Convert callers to the new bus_alloc_resource_any(9) API.Nate Lawson2004-03-171-7/+18
| | | | | | | | Submitted by: Mark Santcroos <marks@ripe.net> Reviewed by: imp, dfr, bde Notes: svn path=/head/; revision=127135
* Device megapatch 4/6:Poul-Henning Kamp2004-02-211-1/+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. Notes: svn path=/head/; revision=126080
* Device megapatch 3/6:Poul-Henning Kamp2004-02-211-2/+0
| | | | | | | | | | | | | | | Add missing D_TTY flags to various drivers. Complete asserts that dev_t's passed to ttyread(), ttywrite(), ttypoll() and ttykqwrite() have (d_flags & D_TTY) and a struct tty pointer. Make ttyread(), ttywrite(), ttypoll() and ttykqwrite() the default cdevsw methods for D_TTY drivers and remove the explicit initializations in various drivers cdevsw structures. Notes: svn path=/head/; revision=126078
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