Messages in this thread Patch in this message | | | From | Joerg Roedel <> | Subject | [PATCH 2/5] iommu/amd: Implement DOMAIN_ATTR_GEOMETRY attribute | Date | Thu, 19 Jan 2012 15:30:02 +0100 |
| |
Implement the attribute itself and add the code for the AMD IOMMU driver.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> --- drivers/iommu/amd_iommu.c | 4 ++++ drivers/iommu/iommu.c | 19 ++++++++++++++++--- include/linux/iommu.h | 11 ++++++++++- 3 files changed, 30 insertions(+), 4 deletions(-)
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index cce1f03..421c3e6 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -3030,6 +3030,10 @@ static int amd_iommu_domain_init(struct iommu_domain *dom) dom->priv = domain; + dom->geometry.aperture_start = 0; + dom->geometry.aperture_end = ~0ULL; + dom->geometry.force_aperture = true; + return 0; out_free: diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index ef54718..3d0b0bf 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -345,10 +345,23 @@ EXPORT_SYMBOL_GPL(iommu_device_group); int iommu_domain_get_attr(struct iommu_domain *domain, enum iommu_attr attr, void *data) { - if (!domain->ops->domain_get_attr) - return -EINVAL; + struct iommu_domain_geometry *geometry; + int ret = 0; + + switch (attr) { + case DOMAIN_ATTR_GEOMETRY: + geometry = data; + *geometry = domain->geometry; + + break; + default: + if (!domain->ops->domain_get_attr) + return -EINVAL; - return domain->ops->domain_get_attr(domain, attr, data); + ret = domain->ops->domain_get_attr(domain, attr, data); + } + + return ret; } EXPORT_SYMBOL_GPL(iommu_domain_get_attr); diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 32d0de1..3f971b3 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -37,16 +37,24 @@ struct iommu_domain; typedef int (*iommu_fault_handler_t)(struct iommu_domain *, struct device *, unsigned long, int); +struct iommu_domain_geometry { + u64 aperture_start; /* First address that can be mapped */ + u64 aperture_end; /* Last address that can be mapped */ + bool force_aperture; /* DMA only allowed in mappable range? */ +}; + struct iommu_domain { struct iommu_ops *ops; void *priv; iommu_fault_handler_t handler; + struct iommu_domain_geometry geometry; }; #define IOMMU_CAP_CACHE_COHERENCY 0x1 #define IOMMU_CAP_INTR_REMAP 0x2 /* isolates device intrs */ enum iommu_attr { + DOMAIN_ATTR_GEOMETRY, /* struct iommu_domain_geometry */ DOMAIN_ATTR_MAX, }; @@ -62,7 +70,8 @@ enum iommu_attr { * @unmap: unmap a physically contiguous memory region from an iommu domain * @iova_to_phys: translate iova to physical address * @domain_has_cap: domain capabilities query - * @commit: commit iommu domain + * @domain_get_attr: Query domain attributes + * @domain_set_attr: Change domain attributes * @pgsize_bitmap: bitmap of supported page sizes */ struct iommu_ops { -- 1.7.5.4
| |