linux-toradex.git/arch/powerpc/include/asm/dma-mapping.h, branch v3.2.63

powerpc: Implement dma_mmap_coherent()

2011-03-29T23:44:00+00:00

This is used by Alsa to mmap buffers allocated with dma_alloc_coherent()
into userspace. We need a special variant to handle machines with
non-coherent DMAs as those buffers have "special" virt addresses and
require non-cachable mappings

Signed-off-by: Benjamin Herrenschmidt

powerpc/dma: Add optional platform override of dma_set_mask()

2010-09-02T04:07:32+00:00

Some platforms may want to override dma_set_mask() to take into
account some specific "features" such as the availability of
a direct-map window in addition to an iommu.

Signed-off-by: Benjamin Herrenschmidt

dma-mapping: remove dma_is_consistent API

2010-08-11T15:59:21+00:00

Architectures implement dma_is_consistent() in different ways (some
misinterpret the definition of API in DMA-API.txt).  So it hasn't been so
useful for drivers.  We have only one user of the API in tree.  Unlikely
out-of-tree drivers use the API.

Even if we fix dma_is_consistent() in some architectures, it doesn't look
useful at all.  It was invented long ago for some old systems that can't
allocate coherent memory at all.  It's better to export only APIs that are
definitely necessary for drivers.

Let's remove this API.

Signed-off-by: FUJITA Tomonori 
Cc: James Bottomley 
Reviewed-by: Konrad Rzeszutek Wilk 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

dma-mapping: unify dma_get_cache_alignment implementations

2010-08-11T15:59:21+00:00

dma_get_cache_alignment returns the minimum DMA alignment.  Architectures
defines it as ARCH_DMA_MINALIGN (formally ARCH_KMALLOC_MINALIGN).  So we
can unify dma_get_cache_alignment implementations.

Note that some architectures implement dma_get_cache_alignment wrongly.
dma_get_cache_alignment() should return the minimum DMA alignment.  So
fully-coherent architectures should return 1.  This patch also fixes this
issue.

Signed-off-by: FUJITA Tomonori 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

dma-mapping: powerpc: use generic pci_set_dma_mask and pci_set_consistent_dma_mask

2010-03-12T23:52:42+00:00

This converts powerpc to use the generic pci_set_dma_mask and
pci_set_consistent_dma_mask (drivers/pci/pci.c).

The generic pci_set_dma_mask does what powerpc's pci_set_dma_mask does.

Unlike powerpc's pci_set_consistent_dma_mask, the gneric
pci_set_consistent_dma_mask sets only coherent_dma_mask.  It doesn't work
for powerpc?  pci_set_consistent_dma_mask API should set only
coherent_dma_mask?

Signed-off-by: FUJITA Tomonori 
Acked-by: Benjamin Herrenschmidt 
Cc: Jesse Barnes 
Cc: Greg KH 
Cc: Kay Sievers 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

dma-mapping: fix off-by-one error in dma_capable()

2009-12-16T15:20:12+00:00

dma_mask is, when interpreted as address, the last valid byte, and hence
comparison msut also be done using the last valid of the buffer in
question.

Also fix the open-coded instances in lib/swiotlb.c.

Signed-off-by: Jan Beulich 
Cc: FUJITA Tomonori 
Cc: Becky Bruce 
Cc: "Luck, Tony" 
Cc: Benjamin Herrenschmidt 
Cc: Ingo Molnar 
Cc: Thomas Gleixner 
Cc: "H. Peter Anvin" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

powerpc: Change archdata dma_data to a union

2009-09-24T05:31:43+00:00

Sometimes this is used to hold a simple offset, and sometimes
it is used to hold a pointer.  This patch changes it to a union containing
void * and dma_addr_t.  get/set accessors are also provided, because it was
getting a bit ugly to get to the actual data.

Signed-off-by: Becky Bruce 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Rename get_dma_direct_offset get_dma_offset

2009-09-24T05:31:43+00:00

The former is no longer really accurate with the swiotlb case now
a possibility.  I also move it into dma-mapping.h - it no longer
needs to be in dma.c, and there are about to be some more accessors
that should all end up in the same place.  A comment is added to
indicate that this function is not used in configs where there is no
simple dma offset, such as the iommu case.

Signed-off-by: Becky Bruce 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Add CONFIG_DMA_API_DEBUG support

2009-08-28T04:24:11+00:00

Signed-off-by: FUJITA Tomonori 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Handle SWIOTLB mapping error properly

2009-08-28T04:24:11+00:00

Signed-off-by: FUJITA Tomonori 
Signed-off-by: Benjamin Herrenschmidt