mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-08-05 16:54:27 +00:00
9e8354b399
All users of ARM IOMMU mappings create them for a particular device, so change the interface to accept the device rather than forcing a vague indirection through a bus type. This prepares for making a similar change to iommu_domain_alloc() itself. Signed-off-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Reviewed-by: Vasant Hegde <vasant.hegde@amd.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com> Signed-off-by: Jason Gunthorpe <jgg@ziepe.ca> Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
36 lines
906 B
C
36 lines
906 B
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef ASMARM_DMA_IOMMU_H
|
|
#define ASMARM_DMA_IOMMU_H
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <linux/mm_types.h>
|
|
#include <linux/scatterlist.h>
|
|
#include <linux/kref.h>
|
|
|
|
struct dma_iommu_mapping {
|
|
/* iommu specific data */
|
|
struct iommu_domain *domain;
|
|
|
|
unsigned long **bitmaps; /* array of bitmaps */
|
|
unsigned int nr_bitmaps; /* nr of elements in array */
|
|
unsigned int extensions;
|
|
size_t bitmap_size; /* size of a single bitmap */
|
|
size_t bits; /* per bitmap */
|
|
dma_addr_t base;
|
|
|
|
spinlock_t lock;
|
|
struct kref kref;
|
|
};
|
|
|
|
struct dma_iommu_mapping *
|
|
arm_iommu_create_mapping(struct device *dev, dma_addr_t base, u64 size);
|
|
|
|
void arm_iommu_release_mapping(struct dma_iommu_mapping *mapping);
|
|
|
|
int arm_iommu_attach_device(struct device *dev,
|
|
struct dma_iommu_mapping *mapping);
|
|
void arm_iommu_detach_device(struct device *dev);
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif
|