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dma-mapping: move the dma_coherent flag to struct device

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Various architectures support both coherent and non-coherent dma on a
per-device basis.  Move the dma_noncoherent flag from the mips archdata
field to struct device proper to prepare the infrastructure for reuse on
other architectures.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Paul Burton <paul.burton@mips.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Christoph Hellwig
2018-08-19 14:53:20 +02:00
parent 5748e1b35b
commit f3ecc0ff04
9 changed files with 41 additions and 46 deletions
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7
include/linux/device.h
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@@ -927,6 +927,8 @@ struct dev_links_info {
* @offline: Set after successful invocation of bus type's .offline().
* @of_node_reused: Set if the device-tree node is shared with an ancestor
* device.
* @dma_coherent: this particular device is dma coherent, even if the
* architecture supports non-coherent devices.
*
* At the lowest level, every device in a Linux system is represented by an
* instance of struct device. The device structure contains the information
@@ -1016,6 +1018,11 @@ struct device {
bool offline_disabled:1;
bool offline:1;
bool of_node_reused:1;
#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \
defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \
defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL)
bool dma_coherent:1;
#endif
};
static inline struct device *kobj_to_dev(struct kobject *kobj)