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Diffstat (limited to '')
-rw-r--r-- | drivers/iommu/iommu-sva-lib.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/drivers/iommu/iommu-sva-lib.h b/drivers/iommu/iommu-sva-lib.h new file mode 100644 index 000000000..8909ea109 --- /dev/null +++ b/drivers/iommu/iommu-sva-lib.h @@ -0,0 +1,67 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * SVA library for IOMMU drivers + */ +#ifndef _IOMMU_SVA_LIB_H +#define _IOMMU_SVA_LIB_H + +#include <linux/ioasid.h> +#include <linux/mm_types.h> + +int iommu_sva_alloc_pasid(struct mm_struct *mm, ioasid_t min, ioasid_t max); +struct mm_struct *iommu_sva_find(ioasid_t pasid); + +/* I/O Page fault */ +struct device; +struct iommu_fault; +struct iopf_queue; + +#ifdef CONFIG_IOMMU_SVA +int iommu_queue_iopf(struct iommu_fault *fault, void *cookie); + +int iopf_queue_add_device(struct iopf_queue *queue, struct device *dev); +int iopf_queue_remove_device(struct iopf_queue *queue, + struct device *dev); +int iopf_queue_flush_dev(struct device *dev); +struct iopf_queue *iopf_queue_alloc(const char *name); +void iopf_queue_free(struct iopf_queue *queue); +int iopf_queue_discard_partial(struct iopf_queue *queue); + +#else /* CONFIG_IOMMU_SVA */ +static inline int iommu_queue_iopf(struct iommu_fault *fault, void *cookie) +{ + return -ENODEV; +} + +static inline int iopf_queue_add_device(struct iopf_queue *queue, + struct device *dev) +{ + return -ENODEV; +} + +static inline int iopf_queue_remove_device(struct iopf_queue *queue, + struct device *dev) +{ + return -ENODEV; +} + +static inline int iopf_queue_flush_dev(struct device *dev) +{ + return -ENODEV; +} + +static inline struct iopf_queue *iopf_queue_alloc(const char *name) +{ + return NULL; +} + +static inline void iopf_queue_free(struct iopf_queue *queue) +{ +} + +static inline int iopf_queue_discard_partial(struct iopf_queue *queue) +{ + return -ENODEV; +} +#endif /* CONFIG_IOMMU_SVA */ +#endif /* _IOMMU_SVA_LIB_H */ |