[linux-2.6-block.git] / drivers / iommu / iommu-sva.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * SVA library for IOMMU drivers
 */
#ifndef _IOMMU_SVA_H
#define _IOMMU_SVA_H

#include <linux/mm_types.h>

/* 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 */
Commit	Line	Data
cfc78dfd JPB	1	/* SPDX-License-Identifier: GPL-2.0 */
	2	/*
	3	* SVA library for IOMMU drivers
	4	*/
757636ed LB	5	#ifndef _IOMMU_SVA_H
757636ed LB	6	#define _IOMMU_SVA_H
cfc78dfd	7
cfc78dfd JPB	8	#include <linux/mm_types.h>
cfc78dfd JPB	9
fc36479d JPB	10	/* I/O Page fault */
	11	struct device;
	12	struct iommu_fault;
	13	struct iopf_queue;
	14
7ba56472	15	#ifdef CONFIG_IOMMU_SVA
fc36479d JPB	16	int iommu_queue_iopf(struct iommu_fault fault, void cookie);
	17
	18	int iopf_queue_add_device(struct iopf_queue queue, struct device dev);
	19	int iopf_queue_remove_device(struct iopf_queue *queue,
	20	struct device *dev);
	21	int iopf_queue_flush_dev(struct device *dev);
	22	struct iopf_queue iopf_queue_alloc(const char name);
	23	void iopf_queue_free(struct iopf_queue *queue);
	24	int iopf_queue_discard_partial(struct iopf_queue *queue);
8cc93159 LB	25	enum iommu_page_response_code
8cc93159 LB	26	iommu_sva_handle_iopf(struct iommu_fault fault, void data);
fc36479d	27
7ba56472	28	#else /* CONFIG_IOMMU_SVA */
fc36479d JPB	29	static inline int iommu_queue_iopf(struct iommu_fault fault, void cookie)
	30	{
	31	return -ENODEV;
	32	}
	33
	34	static inline int iopf_queue_add_device(struct iopf_queue *queue,
	35	struct device *dev)
	36	{
	37	return -ENODEV;
	38	}
	39
	40	static inline int iopf_queue_remove_device(struct iopf_queue *queue,
	41	struct device *dev)
	42	{
	43	return -ENODEV;
	44	}
	45
	46	static inline int iopf_queue_flush_dev(struct device *dev)
	47	{
	48	return -ENODEV;
	49	}
	50
	51	static inline struct iopf_queue iopf_queue_alloc(const char name)
	52	{
	53	return NULL;
	54	}
	55
	56	static inline void iopf_queue_free(struct iopf_queue *queue)
	57	{
	58	}
	59
	60	static inline int iopf_queue_discard_partial(struct iopf_queue *queue)
	61	{
	62	return -ENODEV;
	63	}
8cc93159 LB	64
	65	static inline enum iommu_page_response_code
	66	iommu_sva_handle_iopf(struct iommu_fault fault, void data)
	67	{
	68	return IOMMU_PAGE_RESP_INVALID;
	69	}
7ba56472	70	#endif /* CONFIG_IOMMU_SVA */
757636ed	71	#endif /* _IOMMU_SVA_H */