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| author |   Nipun Gupta <nipun.gupta@nxp.com> | 2018-04-28 08:21:58 +0530 |
|---|---|---|
| committer |   Christoph Hellwig <hch@lst.de> | 2018-05-03 16:22:18 +0200 |
| commit | 07397df29e57cde5799af16e8f148ae10ed75285 (patch) | |
| tree | 7f4e2606ec8d6a26a5433cb4dac32338178092fd /include/linux/device.h | |
| parent | swiotlb: fix inversed DMA_ATTR_NO_WARN test (diff) | |
| download | linux-dev-07397df29e57cde5799af16e8f148ae10ed75285.tar.xz linux-dev-07397df29e57cde5799af16e8f148ae10ed75285.zip | |
dma-mapping: move dma configuration to bus infrastructure
ACPI/OF support for configuration of DMA is a bus specific aspect, and
thus should be configured by the bus. Introduces a 'dma_configure' bus
method so that busses can control their DMA capabilities.
Also update the PCI, Platform, ACPI and host1x buses to use the new
method.
Suggested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nipun Gupta <nipun.gupta@nxp.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com> # PCI parts
Acked-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[hch: simplified host1x_dma_configure based on a comment from Thierry,
rewrote changelog]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'include/linux/device.h')
| -rw-r--r-- | include/linux/device.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/device.h b/include/linux/device.h index 477956990f5e..63aa672bd394 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -88,6 +88,8 @@ extern void bus_remove_file(struct bus_type *, struct bus_attribute *); * @resume: Called to bring a device on this bus out of sleep mode. * @num_vf: Called to find out how many virtual functions a device on this * bus supports. + * @dma_configure: Called to setup DMA configuration on a device on + this bus. * @pm: Power management operations of this bus, callback the specific * device driver's pm-ops. * @iommu_ops: IOMMU specific operations for this bus, used to attach IOMMU @@ -130,6 +132,8 @@ struct bus_type { int (*num_vf)(struct device *dev); + int (*dma_configure)(struct device *dev); + const struct dev_pm_ops *pm; const struct iommu_ops *iommu_ops; |