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authorLorenzo Pieralisi <lorenzo.pieralisi@arm.com>2020-06-19 11:20:08 +0300
committerCatalin Marinas <catalin.marinas@arm.com>2020-07-28 17:51:32 +0300
commita081bd4af4ce80d845a0bab355ab5d0822db8058 (patch)
tree32306cdac3207084afe1dc56d04d96ef18528fa1 /include/linux/of_iommu.h
parent746a71d02b5d15817fcb13c956ba999a87773952 (diff)
downloadlinux-a081bd4af4ce80d845a0bab355ab5d0822db8058.tar.xz
of/device: Add input id to of_dma_configure()
Devices sitting on proprietary busses have a device ID space that is owned by the respective bus and related firmware bindings. In order to let the generic OF layer handle the input translations to an IOMMU id, for such busses the current of_dma_configure() interface should be extended in order to allow the bus layer to provide the device input id parameter - that is retrieved/assigned in bus specific code and firmware. Augment of_dma_configure() to add an optional input_id parameter, leaving current functionality unchanged. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Reviewed-by: Rob Herring <robh@kernel.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: Laurentiu Tudor <laurentiu.tudor@nxp.com> Link: https://lore.kernel.org/r/20200619082013.13661-8-lorenzo.pieralisi@arm.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'include/linux/of_iommu.h')
-rw-r--r--include/linux/of_iommu.h6
1 files changed, 4 insertions, 2 deletions
diff --git a/include/linux/of_iommu.h b/include/linux/of_iommu.h
index f3d40dd7bb66..16f4b3e87f20 100644
--- a/include/linux/of_iommu.h
+++ b/include/linux/of_iommu.h
@@ -13,7 +13,8 @@ extern int of_get_dma_window(struct device_node *dn, const char *prefix,
size_t *size);
extern const struct iommu_ops *of_iommu_configure(struct device *dev,
- struct device_node *master_np);
+ struct device_node *master_np,
+ const u32 *id);
#else
@@ -25,7 +26,8 @@ static inline int of_get_dma_window(struct device_node *dn, const char *prefix,
}
static inline const struct iommu_ops *of_iommu_configure(struct device *dev,
- struct device_node *master_np)
+ struct device_node *master_np,
+ const u32 *id)
{
return NULL;
}