linux-toradex.git/Documentation/DMA-API.txt, branch v2.6.32.2

trivial: Miscellaneous documentation typo fixes

2009-06-12T16:01:47+00:00

Fix various typos in documentation txts.

Signed-off-by: Matt LaPlante 
Signed-off-by: Jiri Kosina

dma-debug: add documentation for the driver filter

2009-06-02T14:21:42+00:00

This patch adds the driver filter feature to the dma-debug
documentation.

Signed-off-by: Joerg Roedel

dma-debug: Documentation update

2009-03-17T11:56:47+00:00

Impact: add documentation about DMA-API debugging to DMA-API.txt

Signed-off-by: Joerg Roedel

Documentation: move DMA-mapping.txt to Doc/PCI/

2009-01-30T02:19:29+00:00

Move DMA-mapping.txt to Documentation/PCI/.

DMA-mapping.txt was supposed to be moved from Documentation/ to
Documentation/PCI/.  The 00-INDEX files in those two directories
were updated, along with a few other text files, but the file
itself somehow escaped being moved, so move it and update more
text files and source files with its new location.

Signed-off-by: Randy Dunlap 
Acked-by: Greg Kroah-Hartman 
cc:	Jesse Barnes 
Signed-off-by: Linus Torvalds

[IA64] SN specific version of dma_get_required_mask()

2009-01-15T18:42:16+00:00

Create a platform specific version of dma_get_required_mask()
for ia64 SN Altix. All SN Altix platforms support 64 bit DMA
addressing regardless of the size of system memory.
Create an ia64 machvec for dma_get_required_mask, with the
SN version unconditionally returning DMA_64BIT_MASK.

Signed-off-by: John Keller 
Signed-off-by: Tony Luck

DMA-API.txt: fix description of pci_map_sg/dma_map_sg scatterlists handling

2008-12-02T03:55:24+00:00

- pci_map_sg/dma_map_sg are used with a scatter gather list that doesn't
  come from the block layer (e.g.  some network drivers do).

- how IOMMUs merge adjacent elements of the scatter/gather list is
  independent of how the block layer determines sees elements.

Signed-off-by: FUJITA Tomonori 
Cc: James Bottomley 
Cc: Tejun Heo 
Cc: Jens Axboe 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

fix an example of scatterlists handling in DMA-API.txt

2008-10-09T06:56:18+00:00

This example isn't the proper way to handle scatterlists (can't handle
sg chaining).

Signed-off-by: FUJITA Tomonori 
Signed-off-by: Jens Axboe

dma-mapping: add the device argument to dma_mapping_error()

2008-07-26T19:00:03+00:00

Add per-device dma_mapping_ops support for CONFIG_X86_64 as POWER
architecture does:

This enables us to cleanly fix the Calgary IOMMU issue that some devices
are not behind the IOMMU (http://lkml.org/lkml/2008/5/8/423).

I think that per-device dma_mapping_ops support would be also helpful for
KVM people to support PCI passthrough but Andi thinks that this makes it
difficult to support the PCI passthrough (see the above thread).  So I
CC'ed this to KVM camp.  Comments are appreciated.

A pointer to dma_mapping_ops to struct dev_archdata is added.  If the
pointer is non NULL, DMA operations in asm/dma-mapping.h use it.  If it's
NULL, the system-wide dma_ops pointer is used as before.

If it's useful for KVM people, I plan to implement a mechanism to register
a hook called when a new pci (or dma capable) device is created (it works
with hot plugging).  It enables IOMMUs to set up an appropriate
dma_mapping_ops per device.

The major obstacle is that dma_mapping_error doesn't take a pointer to the
device unlike other DMA operations.  So x86 can't have dma_mapping_ops per
device.  Note all the POWER IOMMUs use the same dma_mapping_error function
so this is not a problem for POWER but x86 IOMMUs use different
dma_mapping_error functions.

The first patch adds the device argument to dma_mapping_error.  The patch
is trivial but large since it touches lots of drivers and dma-mapping.h in
all the architecture.

This patch:

dma_mapping_error() doesn't take a pointer to the device unlike other DMA
operations.  So we can't have dma_mapping_ops per device.

Note that POWER already has dma_mapping_ops per device but all the POWER
IOMMUs use the same dma_mapping_error function.  x86 IOMMUs use device
argument.

[akpm@linux-foundation.org: fix sge]
[akpm@linux-foundation.org: fix svc_rdma]
[akpm@linux-foundation.org: build fix]
[akpm@linux-foundation.org: fix bnx2x]
[akpm@linux-foundation.org: fix s2io]
[akpm@linux-foundation.org: fix pasemi_mac]
[akpm@linux-foundation.org: fix sdhci]
[akpm@linux-foundation.org: build fix]
[akpm@linux-foundation.org: fix sparc]
[akpm@linux-foundation.org: fix ibmvscsi]
Signed-off-by: FUJITA Tomonori 
Cc: Muli Ben-Yehuda 
Cc: Andi Kleen 
Cc: Thomas Gleixner 
Cc: Ingo Molnar 
Cc: Avi Kivity 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

doc: fix DMA-API function parameters

2008-04-29T15:06:12+00:00

Fix kernel bugzilla #10388.

DMA-API.txt has wrong argument type for some functions.  It uses struct device
but should use struct pci_dev.

Signed-off-by: Randy Dunlap 
Acked-by: James Bottomley 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

dma: document dma_map_attrs() interfaces

2008-04-29T15:06:11+00:00

Document the new dma_*map*_attrs() functions.

[markn@au1.ibm.com: fix up for dma-add-dma_map_attrs-interfaces and update docs]
Signed-off-by: Arthur Kepner 
Acked-by: David S. Miller 
Cc: Tony Luck 
Cc: Jesse Barnes 
Cc: Jes Sorensen 
Cc: Randy Dunlap 
Cc: Roland Dreier 
Cc: James Bottomley 
Cc: Benjamin Herrenschmidt 
Cc: Grant Grundler 
Cc: Michael Ellerman 
Signed-off-by: Mark Nelson 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds