[net-next-2.6.git] / include / linux / iommu.h

/*
 * Copyright (C) 2007-2008 Advanced Micro Devices, Inc.
 * Author: Joerg Roedel <joerg.roedel@amd.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */

#ifndef __LINUX_IOMMU_H
#define __LINUX_IOMMU_H

#define IOMMU_READ	(1)
#define IOMMU_WRITE	(2)
#define IOMMU_CACHE	(4) /* DMA cache coherency */

struct device;

struct iommu_domain {
	void *priv;
};

#define IOMMU_CAP_CACHE_COHERENCY	0x1

struct iommu_ops {
	int (*domain_init)(struct iommu_domain *domain);
	void (*domain_destroy)(struct iommu_domain *domain);
	int (*attach_dev)(struct iommu_domain *domain, struct device *dev);
	void (*detach_dev)(struct iommu_domain *domain, struct device *dev);
	int (*map)(struct iommu_domain *domain, unsigned long iova,
		   phys_addr_t paddr, int gfp_order, int prot);
	int (*unmap)(struct iommu_domain *domain, unsigned long iova,
		     int gfp_order);
	int (*map_range)(struct iommu_domain *domain, unsigned long iova,
			 phys_addr_t paddr, size_t size, int prot);
	void (*unmap_range)(struct iommu_domain *domain, unsigned long iova,
			    size_t size);
	phys_addr_t (*iova_to_phys)(struct iommu_domain *domain,
				    unsigned long iova);
	int (*domain_has_cap)(struct iommu_domain *domain,
			      unsigned long cap);
};

#ifdef CONFIG_IOMMU_API

extern void register_iommu(struct iommu_ops *ops);
extern bool iommu_found(void);
extern struct iommu_domain *iommu_domain_alloc(void);
extern void iommu_domain_free(struct iommu_domain *domain);
extern int iommu_attach_device(struct iommu_domain *domain,
			       struct device *dev);
extern void iommu_detach_device(struct iommu_domain *domain,
				struct device *dev);
extern int iommu_map_range(struct iommu_domain *domain, unsigned long iova,
			   phys_addr_t paddr, size_t size, int prot);
extern void iommu_unmap_range(struct iommu_domain *domain, unsigned long iova,
			      size_t size);
extern int iommu_map(struct iommu_domain *domain, unsigned long iova,
		     phys_addr_t paddr, int gfp_order, int prot);
extern int iommu_unmap(struct iommu_domain *domain, unsigned long iova,
		       int gfp_order);
extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain,
				      unsigned long iova);
extern int iommu_domain_has_cap(struct iommu_domain *domain,
				unsigned long cap);

#else /* CONFIG_IOMMU_API */

static inline void register_iommu(struct iommu_ops *ops)
{
}

static inline bool iommu_found(void)
{
	return false;
}

static inline struct iommu_domain *iommu_domain_alloc(void)
{
	return NULL;
}

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

static inline int iommu_attach_device(struct iommu_domain *domain,
				      struct device *dev)
{
	return -ENODEV;
}

static inline void iommu_detach_device(struct iommu_domain *domain,
				       struct device *dev)
{
}

static inline int iommu_map_range(struct iommu_domain *domain,
				  unsigned long iova, phys_addr_t paddr,
				  size_t size, int prot)
{
	return -ENODEV;
}

static inline void iommu_unmap_range(struct iommu_domain *domain,
				     unsigned long iova, size_t size)
{
}

static inline int iommu_map(struct iommu_domain *domain, unsigned long iova,
			    phys_addr_t paddr, int gfp_order, int prot)
{
	return -ENODEV;
}

static inline int iommu_unmap(struct iommu_domain *domain, unsigned long iova,
			      int gfp_order)
{
	return -ENODEV;
}

static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain,
					     unsigned long iova)
{
	return 0;
}

static inline int domain_has_cap(struct iommu_domain *domain,
				 unsigned long cap)
{
	return 0;
}

#endif /* CONFIG_IOMMU_API */

#endif /* __LINUX_IOMMU_H */
Commit	Line	Data
4a77a6cf JR	1	/*
	2	* Copyright (C) 2007-2008 Advanced Micro Devices, Inc.
	3	* Author: Joerg Roedel <joerg.roedel@amd.com>
	4	*
	5	* This program is free software; you can redistribute it and/or modify it
	6	* under the terms of the GNU General Public License version 2 as published
	7	* by the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write to the Free Software
	16	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	17	*/
	18
	19	#ifndef __LINUX_IOMMU_H
	20	#define __LINUX_IOMMU_H
	21
	22	#define IOMMU_READ (1)
	23	#define IOMMU_WRITE (2)
9cf06697	24	#define IOMMU_CACHE (4) /* DMA cache coherency */
4a77a6cf JR	25
	26	struct device;
	27
	28	struct iommu_domain {
	29	void *priv;
	30	};
	31
dbb9fd86 SY	32	#define IOMMU_CAP_CACHE_COHERENCY 0x1
dbb9fd86 SY	33
4a77a6cf JR	34	struct iommu_ops {
	35	int (domain_init)(struct iommu_domain domain);
	36	void (domain_destroy)(struct iommu_domain domain);
	37	int (attach_dev)(struct iommu_domain domain, struct device *dev);
	38	void (detach_dev)(struct iommu_domain domain, struct device *dev);
67651786 JR	39	int (map)(struct iommu_domain domain, unsigned long iova,
	40	phys_addr_t paddr, int gfp_order, int prot);
	41	int (unmap)(struct iommu_domain domain, unsigned long iova,
	42	int gfp_order);
4abc14a7 JR	43	int (map_range)(struct iommu_domain domain, unsigned long iova,
	44	phys_addr_t paddr, size_t size, int prot);
	45	void (unmap_range)(struct iommu_domain domain, unsigned long iova,
	46	size_t size);
4a77a6cf JR	47	phys_addr_t (iova_to_phys)(struct iommu_domain domain,
4a77a6cf JR	48	unsigned long iova);
dbb9fd86 SY	49	int (domain_has_cap)(struct iommu_domain domain,
dbb9fd86 SY	50	unsigned long cap);
4a77a6cf JR	51	};
	52
	53	#ifdef CONFIG_IOMMU_API
	54
	55	extern void register_iommu(struct iommu_ops *ops);
	56	extern bool iommu_found(void);
	57	extern struct iommu_domain *iommu_domain_alloc(void);
	58	extern void iommu_domain_free(struct iommu_domain *domain);
	59	extern int iommu_attach_device(struct iommu_domain *domain,
	60	struct device *dev);
	61	extern void iommu_detach_device(struct iommu_domain *domain,
	62	struct device *dev);
	63	extern int iommu_map_range(struct iommu_domain *domain, unsigned long iova,
	64	phys_addr_t paddr, size_t size, int prot);
	65	extern void iommu_unmap_range(struct iommu_domain *domain, unsigned long iova,
	66	size_t size);
cefc53c7 JR	67	extern int iommu_map(struct iommu_domain *domain, unsigned long iova,
	68	phys_addr_t paddr, int gfp_order, int prot);
	69	extern int iommu_unmap(struct iommu_domain *domain, unsigned long iova,
	70	int gfp_order);
4a77a6cf JR	71	extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain,
4a77a6cf JR	72	unsigned long iova);
dbb9fd86 SY	73	extern int iommu_domain_has_cap(struct iommu_domain *domain,
dbb9fd86 SY	74	unsigned long cap);
4a77a6cf JR	75
	76	#else /* CONFIG_IOMMU_API */
	77
	78	static inline void register_iommu(struct iommu_ops *ops)
	79	{
	80	}
	81
	82	static inline bool iommu_found(void)
	83	{
	84	return false;
	85	}
	86
	87	static inline struct iommu_domain *iommu_domain_alloc(void)
	88	{
	89	return NULL;
	90	}
	91
	92	static inline void iommu_domain_free(struct iommu_domain *domain)
	93	{
	94	}
	95
	96	static inline int iommu_attach_device(struct iommu_domain *domain,
	97	struct device *dev)
	98	{
	99	return -ENODEV;
	100	}
	101
	102	static inline void iommu_detach_device(struct iommu_domain *domain,
	103	struct device *dev)
	104	{
	105	}
	106
	107	static inline int iommu_map_range(struct iommu_domain *domain,
	108	unsigned long iova, phys_addr_t paddr,
	109	size_t size, int prot)
	110	{
	111	return -ENODEV;
	112	}
	113
	114	static inline void iommu_unmap_range(struct iommu_domain *domain,
	115	unsigned long iova, size_t size)
	116	{
	117	}
	118
cefc53c7 JR	119	static inline int iommu_map(struct iommu_domain *domain, unsigned long iova,
	120	phys_addr_t paddr, int gfp_order, int prot)
	121	{
	122	return -ENODEV;
	123	}
	124
	125	static inline int iommu_unmap(struct iommu_domain *domain, unsigned long iova,
	126	int gfp_order)
	127	{
	128	return -ENODEV;
	129	}
	130
4a77a6cf JR	131	static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain,
	132	unsigned long iova)
	133	{
	134	return 0;
	135	}
	136
dbb9fd86 SY	137	static inline int domain_has_cap(struct iommu_domain *domain,
	138	unsigned long cap)
	139	{
	140	return 0;
	141	}
	142
4a77a6cf JR	143	#endif /* CONFIG_IOMMU_API */
	144
	145	#endif /* __LINUX_IOMMU_H */