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46 Commits

Author SHA1 Message Date
Marius Strobl
08390d3b63 Correct r190283 (partially reverting it) as on sparc64 BUS_DMA_NOCACHE 
actually is only valid for bus_dmamap_load().

MFC after:	3 days
 2009-05-12 20:56:34 +00:00
Robert Noland
ba0b16188e Correct the documentation to reflect the fact that BUS_DMA_NOCACHE is a 
flag to bus_dmamem_alloc() rather than bus_dmamap_load();

Discussed with:	kib
MFC after:	3 days
 2009-03-22 21:00:58 +00:00
Marius Strobl
afbeac3e60 - For maximum flexibility, sparc64 supports BUS_DMA_COHERENT also 
with bus_dmamap_create() and not only bus_dmamem_alloc() so move
  the description of this flag up accordingly in order to document
  this fact. While at, it refine this description with an application
  example.
- Reword the description of BUS_DMA_NOCACHE as this flag is also
  implemented on sparc64.

MFC after:	1 week
 2008-11-16 18:30:16 +00:00
Konstantin Belousov
0763bc964b Remove unneeded comma. 
Noted by:	kensmith
 2008-09-12 13:04:39 +00:00
Konstantin Belousov
d56aeabac3 Document BUS_DMA_NOCACHE. 
MFC after:	3 days
 2008-09-06 15:21:01 +00:00
Wojciech A. Koszek
5bbaa5cf02 Mark "highaddr" and "lowaddr" appropriately. Change "dma" to "DMA". 
Fix spelling mistage found by rodrigc@.

Reviewed by:	rodrigc, danger
 2008-06-09 22:13:14 +00:00
John Baldwin
2f46d62192 Some minor tweaks and updates to bus_dma(9) including some additional notes 
on the address filter and locking callback.

Reviewed by:	ru, scottl
 2007-03-06 17:32:49 +00:00
Mike Pritchard
9280e5fac2 Spelling fixes. 2006-12-14 14:33:13 +00:00
Ruslan Ermilov
81ae4b8da9 Markup fixes. 2006-09-18 15:24:20 +00:00
John-Mark Gurney
d1c32d02b6 now that we have bus_get_dma_tag, document it's requirement in 
bus_dma_tag_create
 2006-09-03 00:31:21 +00:00
Ruslan Ermilov
07bf564cab - Fix some bugs in the descriptions of DMA sync operations. 
- Tweak some text so it's less likely to confuse the reader.

OK'ed by:	scottl
 2006-08-31 19:38:52 +00:00
Giorgos Keramidas
b1cc10206c Typo. 2006-04-29 00:43:23 +00:00
Scott Long
4905491fe3 Add a section about locking protocol for busdma. 2006-04-28 08:36:49 +00:00
Olivier Houchard
d1bd38bb45 Note that BUS_DMA_COHERENT currently only affects sparc64 and arm. 
Suggested by:	scottl
 2006-03-01 23:56:18 +00:00
John-Mark Gurney
6f56dcd441 update examples to use the correct terms that was never updated when the 
earlier descriptions were gone over...

MFC after:	3 days
 2006-02-28 19:58:57 +00:00
Ruslan Ermilov
a5b0d9050a [mdoc] add missing space before a punctuation type argument. 2005-12-13 17:07:52 +00:00
Scott Long
71bb1f9b0c More review and adjustment for reality that should have happened 3 years 
ago.  Document the real behavior of bus_dma_tag_create, bus_dmamap_load,
and other functions.  Also document their arguments and return values.

MFC After: 3 days
 2005-12-05 23:25:59 +00:00
Ruslan Ermilov
78ad54210f -mdoc sweep. 2005-11-18 10:56:28 +00:00
Scott Long
a79d1e8314 Fix a few small problems and bump the date. 
Submitted by: ru
 2005-09-01 19:14:41 +00:00
Scott Long
6f3d270147 More clarification on how bus_dmamap_sync works. Fix bogus text concerning 
bus_dmamem_alloc.
 2005-08-31 16:55:00 +00:00
Scott Long
1cb112ab25 Clarify the description of the bus_dmasync_op_t operation flags. This has 
been misleading and even wrong since the import of the page.
 2005-08-26 18:19:01 +00:00
Ruslan Ermilov
4f06896130 Assorted markup fixes and minor wordsmithing. 
Approved by:	re
 2005-06-15 13:31:23 +00:00
Ruslan Ermilov
36a142c455 Expand contractions. 2005-02-13 23:45:54 +00:00
Ruslan Ermilov
59892d33e5 who's -> whose 2005-02-13 23:23:30 +00:00
Christian Brueffer
2d4071ac8f Typo fixes. 
MFC after:	3 days
 2005-01-18 18:13:03 +00:00
Scott Long
824f4edf4f Document bus_dmamap_load_mbuf_sg() 2005-01-15 20:50:52 +00:00
Kirill Ponomarev
51daf549e8 Remove trailing spaces. 
Reviewed by:	brueffer
MFC after:	3 days
 2005-01-02 18:20:29 +00:00
Scott Long
0f3a007844 Correct and clarify some very incorrect text. 2004-10-22 05:21:20 +00:00
Warner Losh
490ec740c8 Add reference to vslock(9) for locking user address pages into core. 
Suggested by: alc
 2004-08-26 04:16:55 +00:00
Warner Losh
4d855643d1 Clarify what the lockfunc is used for. When it will be called and 
when it won't be called.  The old wording was correct, but not
sufficiently specific to understand when and how it would be called.
The new wording describes the current implementation's usage (which
should be updated if other appropriate times are decided upon),
specifically that it is called only when the load operation is
deferred to keep the locking state consistent.  When the operation
isn't deferred, the calling routine is assumed to have a coherent
locking world.

Reviewed by: scottl
 2004-08-24 23:09:57 +00:00
Warner Losh
95929b661e Even in a 80 column, fixed point font, there's plenty of room for all 
the arguments to bus_dmamap_load, so don't use '...' but list the
actual args.  '...' usually means a variable number of args (cf
printf(3)), but bus_dmamap_load takes a fixed number of arguments.
 2004-08-23 23:28:02 +00:00
Warner Losh
cbfef69c64 In the SYNOPSIS section, move the bus_dmamem_alloc function prototype 
to just before bus_dmamem_free, which is (a) more logical; (b) likely
what was originally intended and (c) matches the order in the NAME and
FUNCTIONS sections.
 2004-08-23 23:17:31 +00:00
John-Mark Gurney
e8c9966d55 fix description of the macros for BUS_DMASYNC opertions. It's from the CPU's 
point of view...  Add a reference to a better description of what the ops
do...

Reviewed by:	scottl
 2004-08-11 14:52:33 +00:00
Scott Long
ab0b83b529 Document that boundaries cannot be smaller than the max segment size. 2004-07-04 04:50:00 +00:00
Ruslan Ermilov
5203edcdc5 Mechanically kill hard sentence breaks and double whitespaces. 2004-07-03 18:29:24 +00:00
Scott Long
2da554d8f2 Small grammar fix. 2004-07-02 15:52:44 +00:00
Mike Pritchard
2988974b58 Spelling fixes. 2004-06-21 14:11:45 +00:00
Hiten Pandya
a1bd700ab1 mdoc(7) police: 
* remove an extra comma at the end of the .Nm list
 2004-05-14 16:57:27 +00:00
Hiten Pandya
c7d3a65d43 Mdoc Janitor: 
* Remove hard sentence breaks from last commit to this file.
 2003-10-23 01:08:38 +00:00
Maxime Henrion
82d227dc2a Document the new BUS_DMA_ZERO flag. 2003-07-27 14:05:29 +00:00
Scott Long
9b5c4b6694 Update the rest of the busdma man page for the change in bus_dma_tag_create() 2003-07-03 09:07:03 +00:00
Scott Long
0e5f9b7d5b Update the busdma manpage to reflect the recent API change to 
bus_dma_tag_create.
 2003-07-03 08:32:42 +00:00
John-Mark Gurney
094dc7e3b9 move maxsegsz down a bit so that the arg definition order matches the 
calling order.
 2003-06-30 20:20:51 +00:00
Maxime Henrion
095ee947fb Backout part of my previous commit dealing with bus_dmasync_op_t 
documentation since people think it was better the way it was before.

Requested by:	gibbs (some time ago)
 2003-06-25 13:15:51 +00:00
Maxime Henrion
b9b855dd65 - Document the fact that you can specify several DMA operations to 
bus_dmamap_sync() by OR'ing them together.
- Don't document what BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE and
  BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE is supposed to do when
  passed to bus_dmamap_sync().  There are other possible combinations
  and the reader just needs to know what the individual flags do and
  that he can combine different DMA operations.
- Use .An when listing authors.

Reviewed by:	hmp
 2003-06-13 20:07:49 +00:00
Hiten Pandya
2450346579 Add the bus_dma(9) manual page to our section 9 collection. It 
provides comprehensive documentation on FreeBSD's Bus DMA interface.

Approved by: gibbs, re@ (scottl)
Reviewed by: gibbs, scottl, des, sam, jake, tmm
 2003-05-30 22:57:54 +00:00