linux.git/include/linux/dma-mapping.h, branch v4.13-rc2

dma-mapping: replace dmam_alloc_noncoherent with dmam_alloc_attrs

2017-06-28T13:55:00+00:00

dmam_alloc_noncoherent is a trivial wrapper around dmam_alloc_attrs,
that hardcodes one particular flag.  Make the devres code more
flexible by allowing the callers to pass arbitrary flags.

Signed-off-by: Christoph Hellwig 
Acked-by: Tejun Heo

dma-mapping: remove dmam_free_noncoherent

2017-06-28T13:54:59+00:00

This function was never used since it was added.

Signed-off-by: Christoph Hellwig 
Acked-by: Tejun Heo

dma-mapping: remove the set_dma_mask method

2017-06-28T13:54:54+00:00

Signed-off-by: Christoph Hellwig

dma-mapping: remove HAVE_ARCH_DMA_SUPPORTED

2017-06-28T13:54:47+00:00

Signed-off-by: Christoph Hellwig

dma-mapping: remove DMA_ERROR_CODE

2017-06-28T13:54:37+00:00

And update the documentation - dma_mapping_error has been supported
everywhere for a long time.

Signed-off-by: Christoph Hellwig

of/acpi: Configure dma operations at probe time for platform/amba/pci bus devices

2017-04-20T14:31:06+00:00

Configuring DMA ops at probe time will allow deferring device probe when
the IOMMU isn't available yet. The dma_configure for the device is
now called from the generic device_attach callback just before the
bus/driver probe is called. This way, configuring the DMA ops for the
device would be called at the same place for all bus_types, hence the
deferred probing mechanism should work for all buses as well.

pci_bus_add_devices    (platform/amba)(_device_create/driver_register)
       |                         |
pci_bus_add_device     (device_add/driver_register)
       |                         |
device_attach           device_initial_probe
       |                         |
__device_attach_driver    __device_attach_driver
       |
driver_probe_device
       |
really_probe
       |
dma_configure

Similarly on the device/driver_unregister path __device_release_driver is
called which inturn calls dma_deconfigure.

This patch changes the dma ops configuration to probe time for
both OF and ACPI based platform/amba/pci bus devices.

Tested-by: Marek Szyprowski 
Tested-by: Hanjun Guo 
Reviewed-by: Robin Murphy 
Acked-by: Rob Herring 
Acked-by: Bjorn Helgaas  (drivers/pci part)
Acked-by: Rafael J. Wysocki 
Signed-off-by: Sricharan R 
Signed-off-by: Joerg Roedel

Merge tag 'for-next-dma_ops' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma

2017-02-25T21:45:43+00:00

Pull rdma DMA mapping updates from Doug Ledford:
 "Drop IB DMA mapping code and use core DMA code instead.

  Bart Van Assche noted that the ib DMA mapping code was significantly
  similar enough to the core DMA mapping code that with a few changes it
  was possible to remove the IB DMA mapping code entirely and switch the
  RDMA stack to use the core DMA mapping code.

  This resulted in a nice set of cleanups, but touched the entire tree
  and has been kept separate for that reason."

* tag 'for-next-dma_ops' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (37 commits)
  IB/rxe, IB/rdmavt: Use dma_virt_ops instead of duplicating it
  IB/core: Remove ib_device.dma_device
  nvme-rdma: Switch from dma_device to dev.parent
  RDS: net: Switch from dma_device to dev.parent
  IB/srpt: Modify a debug statement
  IB/srp: Switch from dma_device to dev.parent
  IB/iser: Switch from dma_device to dev.parent
  IB/IPoIB: Switch from dma_device to dev.parent
  IB/rxe: Switch from dma_device to dev.parent
  IB/vmw_pvrdma: Switch from dma_device to dev.parent
  IB/usnic: Switch from dma_device to dev.parent
  IB/qib: Switch from dma_device to dev.parent
  IB/qedr: Switch from dma_device to dev.parent
  IB/ocrdma: Switch from dma_device to dev.parent
  IB/nes: Remove a superfluous assignment statement
  IB/mthca: Switch from dma_device to dev.parent
  IB/mlx5: Switch from dma_device to dev.parent
  IB/mlx4: Switch from dma_device to dev.parent
  IB/i40iw: Remove a superfluous assignment statement
  IB/hns: Switch from dma_device to dev.parent
  ...

lib/dma-virt: Add dma_virt_ops

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

Several RDMA drivers (hfi1, qib and rxe) expect that ib_sge.addr
is a virtual address. Provide DMA mapping operations that are
suitable for these drivers.

Signed-off-by: Bart Van Assche 
Cc: Christian Borntraeger 
Cc: Joerg Roedel 
Cc: Andy Lutomirski 
Cc: Michael S. Tsirkin 
Signed-off-by: Doug Ledford

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