linux-toradex.git/include/linux/dma-mapping.h, branch v2.6.28.9

convert swiotlb to use dma_get_mask

2008-09-19T08:20:41+00:00

swiotlb can use dma_get_mask() instead of the homegrown function.

Signed-off-by: FUJITA Tomonori 
Cc: tony.luck@intel.com
Signed-off-by: Ingo Molnar

iommu: add dma_get_mask helper function

2008-09-14T14:42:37+00:00

Several IOMMUs do the same thing to get the dma_mask of a device. This
adds a helper function to do the same thing to sweep them.

Signed-off-by: FUJITA Tomonori 
Signed-off-by: Ingo Molnar

add is_buffer_dma_capable helper function

2008-09-10T09:33:43+00:00

is_buffer_dma_capable helper function is to see if a memory region is
DMA-capable or not. The arugments are the dma_mask (or
coherent_dma_mask) of a device and the address and size of a memory
region.

Signed-off-by: FUJITA Tomonori 
Acked-by: Joerg Roedel 
Signed-off-by: Ingo Molnar

dma: add dma_map_attrs() interfaces

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

Introduce new interfaces, dma_*map*_attrs(), for passing architecture-specific
attributes when memory is mapped and unmapped for DMA.  Give the interfaces
default implementations which ignore attributes.  Also introduce the
dma_{set|get}_attr() interfaces for setting and retrieving individual
attributes.  Define one attribute, DMA_ATTR_WRITE_BARRIER, in anticipation of
its use by ia64/sn.  Select whether architectures implement arch-specific
versions of the dma_*map*_attrs() interfaces via HAVE_DMA_ATTRS in Kconfig.

[markn@au1.ibm.com: dma_{set,get}_attr() have to be static inline]
Signed-off-by: Arthur Kepner 
Cc: Tony Luck 
Cc: Jesse Barnes 
Cc: Jes Sorensen 
Cc: Randy Dunlap 
Cc: Roland Dreier 
Cc: James Bottomley 
Cc: David Miller 
Cc: Benjamin Herrenschmidt 
Cc: Grant Grundler 
Cc: Michael Ellerman 
Signed-off-by: Mark Nelson 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

iommu sg merging: add accessors for segment_boundary_mask in device_dma_parameters()

2008-02-05T17:44:11+00:00

This adds new accessors for segment_boundary_mask in device_dma_parameters
structure in the same way I did for max_segment_size.  So we can easily change
where to place struct device_dma_parameters in the future.

dma_get_segment boundary returns 0xffffffff if dma_parms in struct device
isn't set up properly.  0xffffffff is the default value used in the block
layer and the scsi mid layer.

Signed-off-by: FUJITA Tomonori 
Cc: James Bottomley 
Cc: Jens Axboe 
Cc: Greg KH 
Cc: Jeff Garzik 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

iommu sg merging: add device_dma_parameters structure

2008-02-05T17:44:10+00:00

IOMMUs merges scatter/gather segments without considering a low level
driver's restrictions. The problem is that IOMMUs can't access to the
limitations because they are in request_queue.

This patchset introduces a new structure, device_dma_parameters,
including dma information. A pointer to device_dma_parameters is added
to struct device. The bus specific structures (like pci_dev) includes
device_dma_parameters. Low level drivers can use dma_set_max_seg_size
to tell IOMMUs about the restrictions.

We can move more dma stuff in struct device (like dma_mask) to struct
device_dma_parameters later (needs some cleanups before that).

This includes patches for all the IOMMUs that could merge sg (x86_64,
ppc, IA64, alpha, sparc64, and parisc) though only the ppc patch was
tested. The patches for other IOMMUs are only compile tested.

This patch:

Add a new structure, device_dma_parameters, including dma information.  A
pointer to device_dma_parameters is added to struct device.

- there are only max_segment_size and segment_boundary_mask there but we'll
  move more dma stuff in struct device (like dma_mask) to struct
  device_dma_parameters later.  segment_boundary_mask is not supported yet.

- new accessors for the dma parameters are added.  So we can easily change
  where to place struct device_dma_parameters in the future.

- dma_get_max_seg_size returns 64K if dma_parms in struct device isn't set
  up properly.  64K is the default max_segment_size in the block layer.

Signed-off-by: FUJITA Tomonori 
Acked-by: Jeff Garzik 
Cc: James Bottomley 
Acked-by: Jens Axboe 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

linux/dma-mapping.h: rename macro to prevent multiple inclusion

2008-02-03T13:06:26+00:00

Having the macro to prevent multiple inclusion of
include/linux/dma-mapping.h contain the prefix "_ASM" is just begging
for possible confusion some day.

Signed-off-by: Robert P. J. Day 
Signed-off-by: Adrian Bunk

stop using DMA_xxBIT_MASK

2007-10-18T21:37:21+00:00

Now that we have DMA_BIT_MASK(), these macros are pointless.

Cc: Jeremy Fitzhardinge 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

unify DMA_..BIT_MASK definitions: v3.1