linux-toradex.git/include/linux/dma-mapping.h, branch v4.16-rc4

dma-mapping: fix a comment typo

2018-02-12T15:59:08+00:00

Reported-by: Randy Dunlap 
Signed-off-by: Christoph Hellwig

dma-direct: rename dma_noop to dma_direct

2018-01-15T08:35:06+00:00

The trivial direct mapping implementation already does a virtual to
physical translation which isn't strictly a noop, and will soon learn
to do non-direct but linear physical to dma translations through the
device offset and a few small tricks.  Rename it to a better fitting
name.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Vladimir Murzin

dma-mapping: add an arch_dma_supported hook

2018-01-15T08:34:59+00:00

To implement the x86 forbid_dac and iommu_sac_force we want an arch hook
so that it can apply the global options across all dma_map_ops
implementations.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Konrad Rzeszutek Wilk

dma-mapping: clear harmful GFP_* flags in common code

2018-01-15T08:34:55+00:00

Lift the code from x86 so that we behave consistently.  In the future we
should probably warn if any of these is set.

Signed-off-by: Christoph Hellwig 
Acked-by: Jesper Nilsson 
Acked-by: Geert Uytterhoeven  [m68k]

dma-mapping: warn when there is no coherent_dma_mask

2018-01-15T08:34:43+00:00

These days all devices should have a DMA coherent mask, and most dma_ops
implementations rely on that fact.  But just to be sure add an assert to
ring the warning bell if that is not the case.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Vladimir Murzin 
Reviewed-by: Konrad Rzeszutek Wilk

dma-mapping: take dma_pfn_offset into account in dma_max_pfn

2018-01-10T15:25:06+00:00

This makes sure the generic version can be used with architectures /
devices that have a DMA offset in the direct mapping.

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

Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

2017-12-05T18:31:32+00:00

Pull SCSI fixes from James Bottomley:
 "A bunch of fixes for aacraid, a set of coherency fixes that only
  affect non-coherent platforms and one coccinelle detected null check
  after use"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: libsas: align sata_device's rps_resp on a cacheline
  scsi: use dma_get_cache_alignment() as minimum DMA alignment
  scsi: dma-mapping: always provide dma_get_cache_alignment
  scsi: ufs: ufshcd: fix potential NULL pointer dereference in ufshcd_config_vreg
  scsi: aacraid: Prevent crash in case of free interrupt during scsi EH path
  scsi: aacraid: Perform initialization reset only once
  scsi: aacraid: Check for PCI state of device in a generic way

scsi: dma-mapping: always provide dma_get_cache_alignment

2017-11-22T04:05:00+00:00

Provide the dummy version of dma_get_cache_alignment that always returns
1 even if CONFIG_HAS_DMA is not set, so that drivers and subsystems can
use it without ifdefs.

Cc: stable@vger.kernel.org
Signed-off-by: Christoph Hellwig 
Signed-off-by: Martin K. Petersen

kmemcheck: remove annotations

2017-11-16T02:21:04+00:00

Patch series "kmemcheck: kill kmemcheck", v2.

As discussed at LSF/MM, kill kmemcheck.

KASan is a replacement that is able to work without the limitation of
kmemcheck (single CPU, slow).  KASan is already upstream.

We are also not aware of any users of kmemcheck (or users who don't
consider KASan as a suitable replacement).

The only objection was that since KASAN wasn't supported by all GCC
versions provided by distros at that time we should hold off for 2
years, and try again.

Now that 2 years have passed, and all distros provide gcc that supports
KASAN, kill kmemcheck again for the very same reasons.

This patch (of 4):

Remove kmemcheck annotations, and calls to kmemcheck from the kernel.

[alexander.levin@verizon.com: correctly remove kmemcheck call from dma_map_sg_attrs]
  Link: http://lkml.kernel.org/r/20171012192151.26531-1-alexander.levin@verizon.com
Link: http://lkml.kernel.org/r/20171007030159.22241-2-alexander.levin@verizon.com
Signed-off-by: Sasha Levin 
Cc: Alexander Potapenko 
Cc: Eric W. Biederman 
Cc: Michal Hocko 
Cc: Pekka Enberg 
Cc: Steven Rostedt 
Cc: Tim Hansen 
Cc: Vegard Nossum 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge tag 'dma-mapping-4.15' of git://git.infradead.org/users/hch/dma-mapping

2017-11-15T00:54:12+00:00

Pull dma-mapping updates from Christoph Hellwig:

 - turn dma_cache_sync into a dma_map_ops instance and remove
   implementation that purely are dead because the architecture doesn't
   support noncoherent allocations

 - add a flag for busses that need DMA configuration (Robin Murphy)

* tag 'dma-mapping-4.15' of git://git.infradead.org/users/hch/dma-mapping:
  dma-mapping: turn dma_cache_sync into a dma_map_ops method
  sh: make dma_cache_sync a no-op
  xtensa: make dma_cache_sync a no-op
  unicore32: make dma_cache_sync a no-op
  powerpc: make dma_cache_sync a no-op
  mn10300: make dma_cache_sync a no-op
  microblaze: make dma_cache_sync a no-op
  ia64: make dma_cache_sync a no-op
  frv: make dma_cache_sync a no-op
  x86: make dma_cache_sync a no-op
  floppy: consolidate the dummy fd_cacheflush definition
  drivers: flag buses which demand DMA configuration