diff options
| author | Joerg Roedel <joro@8bytes.org> | 2013-02-04 13:00:01 (GMT) |
|---|---|---|
| committer | Emil Medve <Emilian.Medve@Freescale.com> | 2013-03-21 18:42:01 (GMT) |
| commit | 10e82aa4d5de222f4696385ec89bdcd56ddc5f84 (patch) | |
| tree | 60cd2c7ca254bad49dbadb28d054a5bbab8b6fb0 /drivers/iommu | |
| parent | f2197448167ee53ccb75d49aa25f4665feee27ca (diff) | |
| download | linux-fsl-qoriq-10e82aa4d5de222f4696385ec89bdcd56ddc5f84.tar.xz | |
iommu: Add DOMAIN_ATTR_WINDOWS domain attribute
This attribute can be used to set and get the number of
subwindows on IOMMUs that are window-based.
Signed-off-by: Joerg Roedel <joro@8bytes.org>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/iommu.c | 33 |
1 files changed, 30 insertions, 3 deletions
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index b3aced7..b972d43 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -891,6 +891,7 @@ int iommu_domain_get_attr(struct iommu_domain *domain, struct iommu_domain_geometry *geometry; bool *paging; int ret = 0; + u32 *count; switch (attr) { case DOMAIN_ATTR_GEOMETRY: @@ -902,6 +903,15 @@ int iommu_domain_get_attr(struct iommu_domain *domain, paging = data; *paging = (domain->ops->pgsize_bitmap != 0UL); break; + case DOMAIN_ATTR_WINDOWS: + count = data; + + if (domain->ops->domain_get_windows != NULL) + *count = domain->ops->domain_get_windows(domain); + else + ret = -ENODEV; + + break; default: if (!domain->ops->domain_get_attr) return -EINVAL; @@ -916,9 +926,26 @@ EXPORT_SYMBOL_GPL(iommu_domain_get_attr); int iommu_domain_set_attr(struct iommu_domain *domain, enum iommu_attr attr, void *data) { - if (!domain->ops->domain_set_attr) - return -EINVAL; + int ret = 0; + u32 *count; + + switch (attr) { + case DOMAIN_ATTR_WINDOWS: + count = data; + + if (domain->ops->domain_set_windows != NULL) + ret = domain->ops->domain_set_windows(domain, *count); + else + ret = -ENODEV; - return domain->ops->domain_set_attr(domain, attr, data); + break; + default: + if (domain->ops->domain_set_attr == NULL) + return -EINVAL; + + ret = domain->ops->domain_set_attr(domain, attr, data); + } + + return ret; } EXPORT_SYMBOL_GPL(iommu_domain_set_attr); |