Commit Graph

11 Commits

Author SHA1 Message Date
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
Scott Long
7e71df9339 Bring back bus_dmasync_op_t. It is now a typedef to an int, though the
BUS_DMASYNC_ definitions remain as before.  The does not change the ABI,
and reverts the API to be a bit more compatible and flexible.  This has
survived a full 'make universe'.

Approved by:	re (bmah)
2003-05-27 04:59:59 +00:00
Peter Grehan
1e1e003218 - Convert NetBSD-derived macros to inline functions for better
type-checking and future debug code.
- Remove sparse addressing hack, since the only consumer, the macio ATA
  driver, doesn't require it anymore.
2003-04-18 02:38:10 +00:00
Maxime Henrion
7a648f56cf I deserve a big pointy hat for having missed all those references
to bus_dmasync_op_t in my last commit.
2003-04-10 23:50:06 +00:00
Maxime Henrion
f6c912dd0c Correctly set BUS_SPACE_MAXSIZE in all the busdma backends.
It was bogusly set to 64 * 1024 or 128 * 1024 because it was
bogusly reused in the BUS_DMAMAP_NSEGS definition.
2003-02-26 02:16:06 +00:00
Benno Rice
fe5e7c6b2b Rework of how memory resources are discovered and dealt with in macio.
- Store the OpenFirmware "reg" property in the macio ivars.
- Use a struct to define the structure of a "reg" property entry.
- Discover all memory ranges, not just the first.
- In ata_macio, manage our own range and hand out our own allocations using
  bus_space_subregion.
- Fix bus_space_subregion to handle subregions of sparse maps.
2003-01-30 11:28:29 +00:00
Peter Grehan
a5550be852 - define HAS_STREAM_METHODS correctly
- dmamap_load_mbuf/load_uio prototypes

Submitted partly by:  Hiten Pandya <hiten@unixdaemons.com>
2003-01-08 11:43:36 +00:00
Peter Grehan
6dfada4cca Added sparse address support, required by the macio ATA device
Approved by: benno
2002-09-19 04:44:04 +00:00
Benno Rice
25b60a3b49 1) Add busdma machdep code.
2) Add bus_pio.h and bus_memio.h (which do nothing).

Submitted by:	Peter Grehan <peterg@ptree32.com.au> (1)
2002-07-09 12:47:14 +00:00
Alfred Perlstein
812344bc0b Remove __P.
Reveiwed by: benno
2002-03-20 23:17:50 +00:00
Benno Rice
f9bac91b18 Bring in NetBSD code used in the PowerPC port.
Reviewed by:	obrien, dfr
Obtained from:	NetBSD
2001-06-10 02:39:37 +00:00