Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit d7787d57 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

iommu: Add domain window handling functions 



Add the iommu_domain_window_enable() and iommu_domain_window_disable()
functions to the IOMMU-API. These functions will be used to setup
domains that are based on subwindows and not on paging.

Signed-off-by: default avatarJoerg Roedel <joro@8bytes.org>
parent d2e12160

drivers/iommu/iommu.c

+20 −0
Original line number Diff line number Diff line
@@ -852,6 +852,26 @@ size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova, size_t size) 
}

EXPORT_SYMBOL_GPL(iommu_unmap);





int iommu_domain_window_enable(struct iommu_domain *domain, u32 wnd_nr,

			       phys_addr_t paddr, u64 size)

{

	if (unlikely(domain->ops->domain_window_enable == NULL))

		return -ENODEV;



	return domain->ops->domain_window_enable(domain, wnd_nr, paddr, size);

}

EXPORT_SYMBOL_GPL(iommu_domain_window_enable);



void iommu_domain_window_disable(struct iommu_domain *domain, u32 wnd_nr)

{

	if (unlikely(domain->ops->domain_window_disable == NULL))

		return;



	return domain->ops->domain_window_disable(domain, wnd_nr);

}

EXPORT_SYMBOL_GPL(iommu_domain_window_disable);



static int __init iommu_init(void)

{

	iommu_group_kset = kset_create_and_add("iommu_groups",

include/linux/iommu.h

+22 −0
Original line number Diff line number Diff line
@@ -101,6 +101,12 @@ struct iommu_ops { 
			       enum iommu_attr attr, void *data);

	int (*domain_set_attr)(struct iommu_domain *domain,

			       enum iommu_attr attr, void *data);



	/* Window handling functions */

	int (*domain_window_enable)(struct iommu_domain *domain, u32 wnd_nr,

				    phys_addr_t paddr, u64 size);

	void (*domain_window_disable)(struct iommu_domain *domain, u32 wnd_nr);



	unsigned long pgsize_bitmap;

};
@@ -158,6 +164,10 @@ extern int iommu_domain_get_attr(struct iommu_domain *domain, enum iommu_attr, 
extern int iommu_domain_set_attr(struct iommu_domain *domain, enum iommu_attr,

				 void *data);



/* Window handling function prototypes */

extern int iommu_domain_window_enable(struct iommu_domain *domain, u32 wnd_nr,

				      phys_addr_t offset, u64 size);

extern void iommu_domain_window_disable(struct iommu_domain *domain, u32 wnd_nr);

/**

 * report_iommu_fault() - report about an IOMMU fault to the IOMMU framework

 * @domain: the iommu domain where the fault has happened
@@ -240,6 +250,18 @@ static inline int iommu_unmap(struct iommu_domain *domain, unsigned long iova, 
	return -ENODEV;

}



static inline int iommu_domain_window_enable(struct iommu_domain *domain,

					     u32 wnd_nr, phys_addr_t paddr,

					     u64 size)

{

	return -ENODEV;

}



static inline void iommu_domain_window_disable(struct iommu_domain *domain,

					       u32 wnd_nr)

{

}



static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain,

					     unsigned long iova)

{