[linux-block.git] / drivers / iommu / dma-iommu.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (C) 2014-2015 ARM Ltd.
 */
#ifndef __DMA_IOMMU_H
#define __DMA_IOMMU_H

#include <linux/iommu.h>

#ifdef CONFIG_IOMMU_DMA

int iommu_get_dma_cookie(struct iommu_domain *domain);
void iommu_put_dma_cookie(struct iommu_domain *domain);

int iommu_dma_init_fq(struct iommu_domain *domain);

void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list);

extern bool iommu_dma_forcedac;
static inline void iommu_dma_set_pci_32bit_workaround(struct device *dev)
{
	dev->iommu->pci_32bit_workaround = !iommu_dma_forcedac;
}

#else /* CONFIG_IOMMU_DMA */

static inline int iommu_dma_init_fq(struct iommu_domain *domain)
{
	return -EINVAL;
}

static inline int iommu_get_dma_cookie(struct iommu_domain *domain)
{
	return -ENODEV;
}

static inline void iommu_put_dma_cookie(struct iommu_domain *domain)
{
}

static inline void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list)
{
}

static inline void iommu_dma_set_pci_32bit_workaround(struct device *dev)
{
}

#endif	/* CONFIG_IOMMU_DMA */
#endif	/* __DMA_IOMMU_H */
Commit	Line	Data
caab277b	1	/* SPDX-License-Identifier: GPL-2.0-only */
0db2e5d1 RM	2	/*
0db2e5d1 RM	3	* Copyright (C) 2014-2015 ARM Ltd.
0db2e5d1 RM	4	*/
	5	#ifndef __DMA_IOMMU_H
	6	#define __DMA_IOMMU_H
	7
f2042ed2	8	#include <linux/iommu.h>
0db2e5d1 RM	9
0db2e5d1 RM	10	#ifdef CONFIG_IOMMU_DMA
0db2e5d1	11
0db2e5d1 RM	12	int iommu_get_dma_cookie(struct iommu_domain *domain);
	13	void iommu_put_dma_cookie(struct iommu_domain *domain);
	14
452e69b5	15	int iommu_dma_init_fq(struct iommu_domain *domain);
0db2e5d1	16
273df963	17	void iommu_dma_get_resv_regions(struct device dev, struct list_head list);
44bb7e24	18
3542dcb1	19	extern bool iommu_dma_forcedac;
791c2b17 RM	20	static inline void iommu_dma_set_pci_32bit_workaround(struct device *dev)
	21	{
	22	dev->iommu->pci_32bit_workaround = !iommu_dma_forcedac;
	23	}
3542dcb1	24
185da893	25	#else /* CONFIG_IOMMU_DMA */
0db2e5d1	26
452e69b5 RM	27	static inline int iommu_dma_init_fq(struct iommu_domain *domain)
	28	{
	29	return -EINVAL;
	30	}
	31
0db2e5d1 RM	32	static inline int iommu_get_dma_cookie(struct iommu_domain *domain)
	33	{
	34	return -ENODEV;
	35	}
	36
	37	static inline void iommu_put_dma_cookie(struct iommu_domain *domain)
	38	{
	39	}
	40
273df963 RM	41	static inline void iommu_dma_get_resv_regions(struct device dev, struct list_head list)
	42	{
	43	}
	44
791c2b17 RM	45	static inline void iommu_dma_set_pci_32bit_workaround(struct device *dev)
	46	{
	47	}
	48
0db2e5d1	49	#endif /* CONFIG_IOMMU_DMA */
0db2e5d1	50	#endif /* __DMA_IOMMU_H */