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)
025e3d0a95