linux-stable.git/arch/tile/include/asm/dma-mapping.h, branch master

arch: remove tile port

2018-03-16T09:56:03+00:00

The Tile architecture port was added by Chris Metcalf in 2010, and
maintained until early 2018 when he orphaned it due to his departure
from Mellanox, and nobody else stepped up to maintain it. The product
line is still around in the form of the BlueField SoC, but no longer
uses the Tile architecture.

There are also still products for sale with Tile-GX SoCs, notably the
Mikrotik CCR router family. The products all use old (linux-3.3) kernels
with lots of patches and won't be upgraded by their manufacturers. There
have been efforts to port both OpenWRT and Debian to these, but both
projects have stalled and are very unlikely to be continued in the future.

Given that we are reasonably sure that nobody is still using the port
with an upstream kernel any more, it seems better to remove it now while
the port is in a good shape than to let it bitrot for a few years first.

Cc: Chris Metcalf 
Cc: John Paul Adrian Glaubitz 
Link: http://www.mellanox.com/page/npu_multicore_overview
Link: https://jenkins.debian.net/view/rebootstrap/job/rebootstrap_tilegx_gcc7/
Signed-off-by: Arnd Bergmann

dma-mapping: move dma_mark_clean to dma-direct.h

2018-01-10T15:41:12+00:00

And unlike the other helpers we don't require a  as
this helper is a special case for ia64 only, and this keeps it as
simple as possible.

Signed-off-by: Christoph Hellwig

dma-mapping: move swiotlb arch helpers to a new header

2018-01-10T15:40:54+00:00

phys_to_dma, dma_to_phys and dma_capable are helpers published by
architecture code for use of swiotlb and xen-swiotlb only.  Drivers are
not supposed to use these directly, but use the DMA API instead.

Move these to a new asm/dma-direct.h helper, included by a
linux/dma-direct.h wrapper that provides the default linear mapping
unless the architecture wants to override it.

In the MIPS case the existing dma-coherent.h is reused for now as
untangling it will take a bit of work.

Signed-off-by: Christoph Hellwig 
Acked-by: Robin Murphy

dma-mapping: turn dma_cache_sync into a dma_map_ops method

2017-10-19T14:37:49+00:00

After we removed all the dead wood it turns out only two architectures
actually implement dma_cache_sync as a real op: mips and parisc.  Add
a cache_sync method to struct dma_map_ops and implement it for the
mips defualt DMA ops, and the parisc pa11 ops.

Note that arm, arc and openrisc support DMA_ATTR_NON_CONSISTENT, but
never provided a functional dma_cache_sync implementations, which
seems somewhat odd.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Robin Murphy

dma-mapping: remove dma_alloc_noncoherent and dma_free_noncoherent

2017-08-29T08:04:02+00:00

No users left, everyone switched to the _attrs versions.

Signed-off-by: Christoph Hellwig

treewide: Consolidate get_dma_ops() implementations

2017-01-24T17:23:35+00:00

Introduce a new architecture-specific get_arch_dma_ops() function
that takes a struct bus_type * argument. Add get_dma_ops() in
.

Signed-off-by: Bart Van Assche 
Cc: Benjamin Herrenschmidt 
Cc: Boris Ostrovsky 
Cc: David Woodhouse 
Cc: Juergen Gross 
Cc: H. Peter Anvin 
Cc: Ingo Molnar 
Cc: linux-arch@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: Russell King 
Cc: x86@kernel.org
Signed-off-by: Doug Ledford

treewide: Consolidate set_dma_ops() implementations

2017-01-24T17:23:35+00:00

Now that all set_dma_ops() implementations are identical (ignoring
BUG_ON() statements), remove the architecture specific definitions
and add a definition in .

Signed-off-by: Bart Van Assche 
Cc: Benjamin Herrenschmidt 
Cc: Chris Metcalf 
Cc: David Woodhouse 
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: Paul Mackerras 
Cc: Russell King 
Signed-off-by: Doug Ledford

treewide: Move dma_ops from struct dev_archdata into struct device

2017-01-24T17:23:35+00:00

Some but not all architectures provide set_dma_ops(). Move dma_ops
from struct dev_archdata into struct device such that it becomes
possible on all architectures to configure dma_ops per device.

Signed-off-by: Bart Van Assche 
Acked-by: Greg Kroah-Hartman 
Cc: Benjamin Herrenschmidt 
Cc: Boris Ostrovsky 
Cc: David Woodhouse 
Cc: Juergen Gross 
Cc: H. Peter Anvin 
Cc: Ingo Molnar 
Cc: linux-arch@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: Russell King 
Cc: x86@kernel.org
Signed-off-by: Doug Ledford

treewide: Constify most dma_map_ops structures

2017-01-24T17:23:35+00:00

Most dma_map_ops structures are never modified. Constify these
structures such that these can be write-protected. This patch
has been generated as follows:

git grep -l 'struct dma_map_ops' |
  xargs -d\\n sed -i \
    -e 's/struct dma_map_ops/const struct dma_map_ops/g' \
    -e 's/const struct dma_map_ops {/struct dma_map_ops {/g' \
    -e 's/^const struct dma_map_ops;$/struct dma_map_ops;/' \
    -e 's/const const struct dma_map_ops /const struct dma_map_ops /g';
sed -i -e 's/const \(struct dma_map_ops intel_dma_ops\)/\1/' \
  $(git grep -l 'struct dma_map_ops intel_dma_ops');
sed -i -e 's/const \(struct dma_map_ops dma_iommu_ops\)/\1/' \
  $(git grep -l 'struct dma_map_ops' | grep ^arch/powerpc);
sed -i -e '/^struct vmd_dev {$/,/^};$/ s/const \(struct dma_map_ops[[:blank:]]dma_ops;\)/\1/' \
       -e '/^static void vmd_setup_dma_ops/,/^}$/ s/const \(struct dma_map_ops \*dest\)/\1/' \
       -e 's/const \(struct dma_map_ops \*dest = \&vmd->dma_ops\)/\1/' \
    drivers/pci/host/*.c
sed -i -e '/^void __init pci_iommu_alloc(void)$/,/^}$/ s/dma_ops->/intel_dma_ops./' arch/ia64/kernel/pci-dma.c
sed -i -e 's/static const struct dma_map_ops sn_dma_ops/static struct dma_map_ops sn_dma_ops/' arch/ia64/sn/pci/pci_dma.c
sed -i -e 's/(const struct dma_map_ops \*)//' drivers/misc/mic/bus/vop_bus.c

Signed-off-by: Bart Van Assche 
Reviewed-by: Christoph Hellwig 
Cc: Benjamin Herrenschmidt 
Cc: Boris Ostrovsky 
Cc: David Woodhouse 
Cc: Juergen Gross 
Cc: H. Peter Anvin 
Cc: Ingo Molnar 
Cc: linux-arch@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: Russell King 
Cc: x86@kernel.org
Signed-off-by: Doug Ledford

dma-mapping: always provide the dma_map_ops based implementation

2016-01-21T01:09:18+00:00

Move the generic implementation to  now that all
architectures support it and remove the HAVE_DMA_ATTR Kconfig symbol now
that everyone supports them.

[valentinrothberg@gmail.com: remove leftovers in Kconfig]
Signed-off-by: Christoph Hellwig 
Cc: "David S. Miller" 
Cc: Aurelien Jacquiot 
Cc: Chris Metcalf 
Cc: David Howells 
Cc: Geert Uytterhoeven 
Cc: Haavard Skinnemoen 
Cc: Hans-Christian Egtvedt 
Cc: Helge Deller 
Cc: James Hogan 
Cc: Jesper Nilsson 
Cc: Koichi Yasutake 
Cc: Ley Foon Tan 
Cc: Mark Salter 
Cc: Mikael Starvik 
Cc: Steven Miao 
Cc: Vineet Gupta 
Cc: Christian Borntraeger 
Cc: Joerg Roedel 
Cc: Sebastian Ott 
Signed-off-by: Valentin Rothberg 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds