linux/drivers/iommu/iommu-sva.h
Lu Baolu 757636ed26 iommu: Rename iommu-sva-lib.{c,h}
Rename iommu-sva-lib.c[h] to iommu-sva.c[h] as it contains all code
for SVA implementation in iommu core.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Tested-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Tested-by: Tony Zhu <tony.zhu@intel.com>
Link: https://lore.kernel.org/r/20221031005917.45690-14-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2022-11-03 15:47:54 +01:00

76 lines
1.8 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
/*
* SVA library for IOMMU drivers
*/
#ifndef _IOMMU_SVA_H
#define _IOMMU_SVA_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);
enum iommu_page_response_code
iommu_sva_handle_iopf(struct iommu_fault *fault, void *data);
#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;
}
static inline enum iommu_page_response_code
iommu_sva_handle_iopf(struct iommu_fault *fault, void *data)
{
return IOMMU_PAGE_RESP_INVALID;
}
#endif /* CONFIG_IOMMU_SVA */
#endif /* _IOMMU_SVA_H */