mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-05 18:39:59 +00:00
a5bf3cfce8
This is an implementation that IOMMU drivers can use to obtain reserved memory regions from a device tree node. It uses the reserved-memory DT bindings to find the regions associated with a given device. If these regions are marked accordingly, identity mappings will be created for them in the IOMMU domain that the devices will be attached to. Cc: Frank Rowand <frowand.list@gmail.com> Cc: devicetree@vger.kernel.org Reviewed-by: Rob Herring <robh@kernel.org> Acked-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Thierry Reding <treding@nvidia.com> Link: https://lore.kernel.org/r/20230120174251.4004100-4-thierry.reding@gmail.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
34 lines
703 B
C
34 lines
703 B
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __OF_IOMMU_H
|
|
#define __OF_IOMMU_H
|
|
|
|
struct device;
|
|
struct device_node;
|
|
struct iommu_ops;
|
|
|
|
#ifdef CONFIG_OF_IOMMU
|
|
|
|
extern const struct iommu_ops *of_iommu_configure(struct device *dev,
|
|
struct device_node *master_np,
|
|
const u32 *id);
|
|
|
|
extern void of_iommu_get_resv_regions(struct device *dev,
|
|
struct list_head *list);
|
|
|
|
#else
|
|
|
|
static inline const struct iommu_ops *of_iommu_configure(struct device *dev,
|
|
struct device_node *master_np,
|
|
const u32 *id)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline void of_iommu_get_resv_regions(struct device *dev,
|
|
struct list_head *list)
|
|
{
|
|
}
|
|
|
|
#endif /* CONFIG_OF_IOMMU */
|
|
|
|
#endif /* __OF_IOMMU_H */
|