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iommu: Add domain window handling functions

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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: Joerg Roedel <joro@8bytes.org>
This commit is contained in:
Joerg Roedel 2013-01-29 14:26:20 +01:00
commit d7787d579c
2 changed files with 42 additions and 0 deletions
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20
drivers/iommu/iommu.c
View file

@ -852,6 +852,26 @@ size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova, size_t size)
} }
EXPORT_SYMBOL_GPL(iommu_unmap); 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) static int __init iommu_init(void)
{ {
iommu_group_kset = kset_create_and_add("iommu_groups", iommu_group_kset = kset_create_and_add("iommu_groups",

22
include/linux/iommu.h
View file

@ -101,6 +101,12 @@ struct iommu_ops {
enum iommu_attr attr, void *data); enum iommu_attr attr, void *data);
int (*domain_set_attr)(struct iommu_domain *domain, int (*domain_set_attr)(struct iommu_domain *domain,
enum iommu_attr attr, void *data); 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; 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, extern int iommu_domain_set_attr(struct iommu_domain *domain, enum iommu_attr,
void *data); 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 * report_iommu_fault() - report about an IOMMU fault to the IOMMU framework
* @domain: the iommu domain where the fault has happened * @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; 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, static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain,
unsigned long iova) unsigned long iova)
{ {