freebsd-dev/sys/dev/sound/isa
Scott Long f6b1c44d1f Mega busdma API commit.
Add two new arguments to bus_dma_tag_create(): lockfunc and lockfuncarg.
Lockfunc allows a driver to provide a function for managing its locking
semantics while using busdma.  At the moment, this is used for the
asynchronous busdma_swi and callback mechanism.  Two lockfunc implementations
are provided: busdma_lock_mutex() performs standard mutex operations on the
mutex that is specified from lockfuncarg.  dftl_lock() is a panic
implementation and is defaulted to when NULL, NULL are passed to
bus_dma_tag_create().  The only time that NULL, NULL should ever be used is
when the driver ensures that bus_dmamap_load() will not be deferred.
Drivers that do not provide their own locking can pass
busdma_lock_mutex,&Giant args in order to preserve the former behaviour.

sparc64 and powerpc do not provide real busdma_swi functions, so this is
largely a noop on those platforms.  The busdma_swi on is64 is not properly
locked yet, so warnings will be emitted on this platform when busdma
callback deferrals happen.

If anyone gets panics or warnings from dflt_lock() being called, please
let me know right away.

Reviewed by:	tmm, gibbs
2003-07-01 15:52:06 +00:00
..
ad1816.c Mega busdma API commit. 2003-07-01 15:52:06 +00:00
ad1816.h
emu8000.c Change callers of mtx_init() to pass in an appropriate lock type name. In 2002-04-04 21:03:38 +00:00
es1888.c Include <isa/isavar.h> to fix building on alpha. 2003-02-08 07:05:07 +00:00
ess.c Mega busdma API commit. 2003-07-01 15:52:06 +00:00
gusc.c
gusmidi.c Change callers of mtx_init() to pass in an appropriate lock type name. In 2002-04-04 21:03:38 +00:00
mpu.c Change callers of mtx_init() to pass in an appropriate lock type name. In 2002-04-04 21:03:38 +00:00
mss.c Mega busdma API commit. 2003-07-01 15:52:06 +00:00
mss.h
opl.c Change callers of mtx_init() to pass in an appropriate lock type name. In 2002-04-04 21:03:38 +00:00
sb8.c Mega busdma API commit. 2003-07-01 15:52:06 +00:00
sb16.c Mega busdma API commit. 2003-07-01 15:52:06 +00:00
sb.h
sbc.c - Clean up ISA DMA supports. 2003-02-07 14:05:34 +00:00
sndbuf_dma.c - Clean up ISA DMA supports. 2003-02-07 14:05:34 +00:00
uartsio.c Do not return(foo()) in void function. 2002-12-18 22:53:24 +00:00