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iommu/sva: Move PASID helpers to sva code

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Preparing to remove IOASID infrastructure, PASID management will be
under SVA code. Decouple mm code from IOASID.

Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20230322200803.869130-3-jacob.jun.pan@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Jacob Pan
2023-03-22 13:07:58 -07:00
committed by Joerg Roedel
parent 760f41d182
commit cd3891158a
5 changed files with 24 additions and 38 deletions
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14
include/linux/iommu.h
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@@ -13,7 +13,6 @@
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/ioasid.h>
#include <uapi/linux/iommu.h>
#define IOMMU_READ (1 << 0)
@@ -192,6 +191,8 @@ enum iommu_dev_features {
};
#define IOMMU_PASID_INVALID (-1U)
typedef unsigned int ioasid_t;
#define INVALID_IOASID ((ioasid_t)-1)
#ifdef CONFIG_IOMMU_API
@@ -1172,7 +1173,16 @@ static inline bool tegra_dev_iommu_get_stream_id(struct device *dev, u32 *stream
return false;
}
static inline bool pasid_valid(ioasid_t ioasid)
{
return ioasid != INVALID_IOASID;
}
#ifdef CONFIG_IOMMU_SVA
static inline void mm_pasid_init(struct mm_struct *mm)
{
mm->pasid = INVALID_IOASID;
}
void mm_pasid_drop(struct mm_struct *mm);
struct iommu_sva *iommu_sva_bind_device(struct device *dev,
struct mm_struct *mm);
void iommu_sva_unbind_device(struct iommu_sva *handle);
@@ -1192,6 +1202,8 @@ static inline u32 iommu_sva_get_pasid(struct iommu_sva *handle)
{
return IOMMU_PASID_INVALID;
}
static inline void mm_pasid_init(struct mm_struct *mm) {}
static inline void mm_pasid_drop(struct mm_struct *mm) {}
#endif /* CONFIG_IOMMU_SVA */
#endif /* __LINUX_IOMMU_H */