scottl 4d495abb9d 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
..
if_hme_pci.c	Some gem and hme hardware bogusly has the intpin register hardwired to	2003-07-01 14:11:04 +00:00
if_hme_sbus.c	- Express hard dependencies on bus (pci, isa, pccard) and	2003-04-15 06:37:30 +00:00
if_hme.c	Mega busdma API commit.	2003-07-01 15:52:06 +00:00
if_hmereg.h	Convert to use bus_dmamap_load_mbuf(); decouple software TX descriptors	2003-01-06 22:12:57 +00:00
if_hmevar.h	Add detach, shutdown, suspend and resume methods.	2003-01-09 00:45:10 +00:00