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freebsd-dev/sys/sparc64/pci
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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
..
apb.c Add the new sparc64 OFW PCI framework, conditional on options OFW_NEWPCI 2003-07-01 14:52:47 +00:00
ofw_pci_if.m Add the new sparc64 OFW PCI framework, conditional on options OFW_NEWPCI 2003-07-01 14:52:47 +00:00
ofw_pci.c Add the new sparc64 OFW PCI framework, conditional on options OFW_NEWPCI 2003-07-01 14:52:47 +00:00
ofw_pci.h Add the new sparc64 OFW PCI framework, conditional on options OFW_NEWPCI 2003-07-01 14:52:47 +00:00
ofw_pcib_subr.c Add the new sparc64 OFW PCI framework, conditional on options OFW_NEWPCI 2003-07-01 14:52:47 +00:00
ofw_pcib_subr.h Add the new sparc64 OFW PCI framework, conditional on options OFW_NEWPCI 2003-07-01 14:52:47 +00:00
ofw_pcib.c Add the new sparc64 OFW PCI framework, conditional on options OFW_NEWPCI 2003-07-01 14:52:47 +00:00
ofw_pcibus.c Add the new sparc64 OFW PCI framework, conditional on options OFW_NEWPCI 2003-07-01 14:52:47 +00:00
psycho.c Mega busdma API commit. 2003-07-01 15:52:06 +00:00
psychoreg.h
psychovar.h Add the new sparc64 OFW PCI framework, conditional on options OFW_NEWPCI 2003-07-01 14:52:47 +00:00