[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / arm / plat-omap / include / plat / iovmm.h

/*
 * omap iommu: simple virtual address space management
 *
 * Copyright (C) 2008-2009 Nokia Corporation
 *
 * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.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.
 */

#ifndef __IOMMU_MMAP_H
#define __IOMMU_MMAP_H

#include <linux/iommu.h>

struct iovm_struct {
	struct iommu		*iommu;	/* iommu object which this belongs to */
	u32			da_start; /* area definition */
	u32			da_end;
	u32			flags; /* IOVMF_: see below */
	struct list_head	list; /* linked in ascending order */
	const struct sg_table	*sgt; /* keep 'page' <-> 'da' mapping */
	void			*va; /* mpu side mapped address */
};

/*
 * IOVMF_FLAGS: attribute for iommu virtual memory area(iovma)
 *
 * lower 16 bit is used for h/w and upper 16 bit is for s/w.
 */
#define IOVMF_SW_SHIFT		16

/*
 * iovma: h/w flags derived from cam and ram attribute
 */
#define IOVMF_CAM_MASK		(~((1 << 10) - 1))
#define IOVMF_RAM_MASK		(~IOVMF_CAM_MASK)

#define IOVMF_PGSZ_MASK		(3 << 0)
#define IOVMF_PGSZ_1M		MMU_CAM_PGSZ_1M
#define IOVMF_PGSZ_64K		MMU_CAM_PGSZ_64K
#define IOVMF_PGSZ_4K		MMU_CAM_PGSZ_4K
#define IOVMF_PGSZ_16M		MMU_CAM_PGSZ_16M

#define IOVMF_ENDIAN_MASK	(1 << 9)
#define IOVMF_ENDIAN_BIG	MMU_RAM_ENDIAN_BIG
#define IOVMF_ENDIAN_LITTLE	MMU_RAM_ENDIAN_LITTLE

#define IOVMF_ELSZ_MASK		(3 << 7)
#define IOVMF_ELSZ_8		MMU_RAM_ELSZ_8
#define IOVMF_ELSZ_16		MMU_RAM_ELSZ_16
#define IOVMF_ELSZ_32		MMU_RAM_ELSZ_32
#define IOVMF_ELSZ_NONE		MMU_RAM_ELSZ_NONE

#define IOVMF_MIXED_MASK	(1 << 6)
#define IOVMF_MIXED		MMU_RAM_MIXED

/*
 * iovma: s/w flags, used for mapping and umapping internally.
 */
#define IOVMF_MMIO		(1 << IOVMF_SW_SHIFT)
#define IOVMF_ALLOC		(2 << IOVMF_SW_SHIFT)
#define IOVMF_ALLOC_MASK	(3 << IOVMF_SW_SHIFT)

/* "superpages" is supported just with physically linear pages */
#define IOVMF_DISCONT		(1 << (2 + IOVMF_SW_SHIFT))
#define IOVMF_LINEAR		(2 << (2 + IOVMF_SW_SHIFT))
#define IOVMF_LINEAR_MASK	(3 << (2 + IOVMF_SW_SHIFT))

#define IOVMF_DA_FIXED		(1 << (4 + IOVMF_SW_SHIFT))


extern struct iovm_struct *find_iovm_area(struct iommu *obj, u32 da);
extern u32 iommu_vmap(struct iommu_domain *domain, struct iommu *obj, u32 da,
			const struct sg_table *sgt, u32 flags);
extern struct sg_table *iommu_vunmap(struct iommu_domain *domain,
				struct iommu *obj, u32 da);
extern u32 iommu_vmalloc(struct iommu_domain *domain, struct iommu *obj,
				u32 da, size_t bytes, u32 flags);
extern void iommu_vfree(struct iommu_domain *domain, struct iommu *obj,
				const u32 da);
extern u32 iommu_kmap(struct iommu_domain *domain, struct iommu *obj, u32 da,
				u32 pa, size_t bytes, u32 flags);
extern void iommu_kunmap(struct iommu_domain *domain, struct iommu *obj,
				u32 da);
extern u32 iommu_kmalloc(struct iommu_domain *domain, struct iommu *obj,
				u32 da, size_t bytes, u32 flags);
extern void iommu_kfree(struct iommu_domain *domain, struct iommu *obj, u32 da);

extern void *da_to_va(struct iommu *obj, u32 da);

#endif /* __IOMMU_MMAP_H */
Commit	Line	Data
69d3a84a HD	1	/*
	2	* omap iommu: simple virtual address space management
	3	*
	4	* Copyright (C) 2008-2009 Nokia Corporation
	5	*
	6	* Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*/
	12
	13	#ifndef __IOMMU_MMAP_H
	14	#define __IOMMU_MMAP_H
	15
f626b52d OBC	16	#include <linux/iommu.h>
f626b52d OBC	17
69d3a84a HD	18	struct iovm_struct {
	19	struct iommu iommu; / iommu object which this belongs to */
	20	u32 da_start; /* area definition */
	21	u32 da_end;
	22	u32 flags; /* IOVMF_: see below */
	23	struct list_head list; /* linked in ascending order */
	24	const struct sg_table sgt; / keep 'page' <-> 'da' mapping */
	25	void va; / mpu side mapped address */
	26	};
	27
	28	/*
	29	* IOVMF_FLAGS: attribute for iommu virtual memory area(iovma)
	30	*
	31	* lower 16 bit is used for h/w and upper 16 bit is for s/w.
	32	*/
	33	#define IOVMF_SW_SHIFT 16
69d3a84a HD	34
	35	/*
	36	* iovma: h/w flags derived from cam and ram attribute
	37	*/
	38	#define IOVMF_CAM_MASK (~((1 << 10) - 1))
	39	#define IOVMF_RAM_MASK (~IOVMF_CAM_MASK)
	40
	41	#define IOVMF_PGSZ_MASK (3 << 0)
	42	#define IOVMF_PGSZ_1M MMU_CAM_PGSZ_1M
	43	#define IOVMF_PGSZ_64K MMU_CAM_PGSZ_64K
	44	#define IOVMF_PGSZ_4K MMU_CAM_PGSZ_4K
	45	#define IOVMF_PGSZ_16M MMU_CAM_PGSZ_16M
	46
	47	#define IOVMF_ENDIAN_MASK (1 << 9)
	48	#define IOVMF_ENDIAN_BIG MMU_RAM_ENDIAN_BIG
	49	#define IOVMF_ENDIAN_LITTLE MMU_RAM_ENDIAN_LITTLE
	50
	51	#define IOVMF_ELSZ_MASK (3 << 7)
	52	#define IOVMF_ELSZ_8 MMU_RAM_ELSZ_8
	53	#define IOVMF_ELSZ_16 MMU_RAM_ELSZ_16
	54	#define IOVMF_ELSZ_32 MMU_RAM_ELSZ_32
	55	#define IOVMF_ELSZ_NONE MMU_RAM_ELSZ_NONE
	56
	57	#define IOVMF_MIXED_MASK (1 << 6)
	58	#define IOVMF_MIXED MMU_RAM_MIXED
	59
	60	/*
	61	* iovma: s/w flags, used for mapping and umapping internally.
	62	*/
	63	#define IOVMF_MMIO (1 << IOVMF_SW_SHIFT)
	64	#define IOVMF_ALLOC (2 << IOVMF_SW_SHIFT)
	65	#define IOVMF_ALLOC_MASK (3 << IOVMF_SW_SHIFT)
	66
	67	/* "superpages" is supported just with physically linear pages */
	68	#define IOVMF_DISCONT (1 << (2 + IOVMF_SW_SHIFT))
	69	#define IOVMF_LINEAR (2 << (2 + IOVMF_SW_SHIFT))
	70	#define IOVMF_LINEAR_MASK (3 << (2 + IOVMF_SW_SHIFT))
	71
	72	#define IOVMF_DA_FIXED (1 << (4 + IOVMF_SW_SHIFT))
69d3a84a HD	73
	74
	75	extern struct iovm_struct find_iovm_area(struct iommu obj, u32 da);
f626b52d	76	extern u32 iommu_vmap(struct iommu_domain domain, struct iommu obj, u32 da,
69d3a84a	77	const struct sg_table *sgt, u32 flags);
f626b52d OBC	78	extern struct sg_table iommu_vunmap(struct iommu_domain domain,
	79	struct iommu *obj, u32 da);
	80	extern u32 iommu_vmalloc(struct iommu_domain domain, struct iommu obj,
	81	u32 da, size_t bytes, u32 flags);
	82	extern void iommu_vfree(struct iommu_domain domain, struct iommu obj,
	83	const u32 da);
	84	extern u32 iommu_kmap(struct iommu_domain domain, struct iommu obj, u32 da,
	85	u32 pa, size_t bytes, u32 flags);
	86	extern void iommu_kunmap(struct iommu_domain domain, struct iommu obj,
	87	u32 da);
	88	extern u32 iommu_kmalloc(struct iommu_domain domain, struct iommu obj,
	89	u32 da, size_t bytes, u32 flags);
	90	extern void iommu_kfree(struct iommu_domain domain, struct iommu obj, u32 da);
69d3a84a HD	91
	92	extern void da_to_va(struct iommu obj, u32 da);
	93
	94	#endif /* __IOMMU_MMAP_H */