omap-iovmm.c File Reference

#include <linux/module.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/device.h>
#include <linux/scatterlist.h>
#include <linux/iommu.h>
#include <asm/cacheflush.h>
#include <asm/mach/map.h>
#include <plat/iommu.h>
#include <plat/iovmm.h>
#include <plat/iopgtable.h>

Go to the source code of this file.

Macros
#define	sgtable_ok(x)   (!!sgtable_len(x))

Functions
struct iovm_struct *	omap_find_iovm_area (struct device *dev, u32 da)
	EXPORT_SYMBOL_GPL (omap_find_iovm_area)
void *	omap_da_to_va (struct device *dev, u32 da)
	EXPORT_SYMBOL_GPL (omap_da_to_va)
u32	omap_iommu_vmap (struct iommu_domain *domain, struct device *dev, u32 da, const struct sg_table *sgt, u32 flags)
	EXPORT_SYMBOL_GPL (omap_iommu_vmap)
struct sg_table *	omap_iommu_vunmap (struct iommu_domain *domain, struct device *dev, u32 da)
	EXPORT_SYMBOL_GPL (omap_iommu_vunmap)
u32	omap_iommu_vmalloc (struct iommu_domain *domain, struct device *dev, u32 da, size_t bytes, u32 flags)
	EXPORT_SYMBOL_GPL (omap_iommu_vmalloc)
void	omap_iommu_vfree (struct iommu_domain *domain, struct device *dev, const u32 da)
	EXPORT_SYMBOL_GPL (omap_iommu_vfree)
	module_init (iovmm_init)
	module_exit (iovmm_exit)
	MODULE_DESCRIPTION ("omap iommu: simple virtual address space management")
	MODULE_AUTHOR ("Hiroshi DOYU <[email protected]>")
	MODULE_LICENSE ("GPL v2")

Macro Definition Documentation

#define sgtable_ok

(

x

)

(!!sgtable_len(x))

Definition at line 71 of file omap-iovmm.c.

Function Documentation

EXPORT_SYMBOL_GPL

(

omap_find_iovm_area

)

EXPORT_SYMBOL_GPL

(

omap_da_to_va

)

EXPORT_SYMBOL_GPL

(

omap_iommu_vmap

)

EXPORT_SYMBOL_GPL

(

omap_iommu_vunmap

)

EXPORT_SYMBOL_GPL

(

omap_iommu_vmalloc

)

EXPORT_SYMBOL_GPL

(

omap_iommu_vfree

)

MODULE_AUTHOR

(

"Hiroshi DOYU <[email protected]>"

)

MODULE_DESCRIPTION

(

"omap iommu: simple virtual address space management"

)

module_exit

(

iovmm_exit

)

module_init

(

iovmm_init

)

MODULE_LICENSE

(

"GPL v2"

)

void* omap_da_to_va	(	struct device *	dev,
		u32	da
	)

omap_da_to_va - convert (d) to (v) : client device : iommu device virtual address : mpu virtual address

Returns mpu virtual addr which corresponds to a given device virtual addr

Definition at line 354 of file omap-iovmm.c.

struct iovm_struct* omap_find_iovm_area ( struct device *  dev, u32  da  )

read

omap_find_iovm_area - find iovma which includes : client device : iommu device virtual address

Find the existing iovma starting at

Definition at line 239 of file omap-iovmm.c.

void omap_iommu_vfree	(	struct iommu_domain *	domain,
		struct device *	dev,
		const u32	da
	)

omap_iommu_vfree - release memory allocated by 'omap_iommu_vmalloc()' : client device : iommu device virtual address

Frees the iommu virtually continuous memory area starting at , as obtained from 'omap_iommu_vmalloc()'.

Definition at line 710 of file omap-iovmm.c.

u32 omap_iommu_vmalloc	(	struct iommu_domain *	domain,
		struct device *	dev,
		u32	da,
		size_t	bytes,
		u32	flags
	)

omap_iommu_vmalloc - (d)-(p)-(v) address allocator and mapper : client device : contiguous iommu virtual memory : allocation size : iovma and page property

Allocate linearly and creates 1-n-1 mapping and returns again, which might be adjusted if 'IOVMF_DA_FIXED' is not set.

Definition at line 661 of file omap-iovmm.c.

u32 omap_iommu_vmap	(	struct iommu_domain *	domain,
		struct device *	dev,
		u32	da,
		const struct sg_table *	sgt,
		u32	flags
	)

omap_iommu_vmap - (d)-(p)-(v) address mapper : iommu domain : client device : address of scatter gather table : iovma and page property

Creates 1-n-1 mapping with given and returns . All element must be io page size aligned.

Definition at line 591 of file omap-iovmm.c.

struct sg_table* omap_iommu_vunmap ( struct iommu_domain *  domain, struct device *  dev, u32  da  )

read

omap_iommu_vunmap - release virtual mapping obtained by 'omap_iommu_vmap()' : iommu domain : client device : iommu device virtual address

Free the iommu virtually contiguous memory area starting at , which was returned by 'omap_iommu_vmap()'.

Definition at line 633 of file omap-iovmm.c.