diff options
Diffstat (limited to 'drivers/iommu/iommu.c')
| -rw-r--r-- | drivers/iommu/iommu.c | 44 |
1 files changed, 41 insertions, 3 deletions
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 63b37563db7e..8c15c5980299 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -36,7 +36,11 @@ static struct kset *iommu_group_kset; static DEFINE_IDA(iommu_group_ida); +#ifdef CONFIG_IOMMU_DEFAULT_PASSTHROUGH +static unsigned int iommu_def_domain_type = IOMMU_DOMAIN_IDENTITY; +#else static unsigned int iommu_def_domain_type = IOMMU_DOMAIN_DMA; +#endif struct iommu_callback_data { const struct iommu_ops *ops; @@ -294,11 +298,39 @@ static ssize_t iommu_group_show_resv_regions(struct iommu_group *group, return (str - buf); } +static ssize_t iommu_group_show_type(struct iommu_group *group, + char *buf) +{ + char *type = "unknown\n"; + + if (group->default_domain) { + switch (group->default_domain->type) { + case IOMMU_DOMAIN_BLOCKED: + type = "blocked\n"; + break; + case IOMMU_DOMAIN_IDENTITY: + type = "identity\n"; + break; + case IOMMU_DOMAIN_UNMANAGED: + type = "unmanaged\n"; + break; + case IOMMU_DOMAIN_DMA: + type = "DMA"; + break; + } + } + strcpy(buf, type); + + return strlen(type); +} + static IOMMU_GROUP_ATTR(name, S_IRUGO, iommu_group_show_name, NULL); static IOMMU_GROUP_ATTR(reserved_regions, 0444, iommu_group_show_resv_regions, NULL); +static IOMMU_GROUP_ATTR(type, 0444, iommu_group_show_type, NULL); + static void iommu_group_release(struct kobject *kobj) { struct iommu_group *group = to_iommu_group(kobj); @@ -380,6 +412,10 @@ struct iommu_group *iommu_group_alloc(void) if (ret) return ERR_PTR(ret); + ret = iommu_group_create_file(group, &iommu_group_attr_type); + if (ret) + return ERR_PTR(ret); + pr_debug("Allocated group %d\n", group->id); return group; @@ -1637,8 +1673,8 @@ size_t iommu_unmap_fast(struct iommu_domain *domain, } EXPORT_SYMBOL_GPL(iommu_unmap_fast); -size_t default_iommu_map_sg(struct iommu_domain *domain, unsigned long iova, - struct scatterlist *sg, unsigned int nents, int prot) +size_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova, + struct scatterlist *sg, unsigned int nents, int prot) { struct scatterlist *s; size_t mapped = 0; @@ -1678,7 +1714,7 @@ out_err: return 0; } -EXPORT_SYMBOL_GPL(default_iommu_map_sg); +EXPORT_SYMBOL_GPL(iommu_map_sg); int iommu_domain_window_enable(struct iommu_domain *domain, u32 wnd_nr, phys_addr_t paddr, u64 size, int prot) @@ -1748,6 +1784,8 @@ static int __init iommu_init(void) NULL, kernel_kobj); BUG_ON(!iommu_group_kset); + iommu_debugfs_setup(); + return 0; } core_initcall(iommu_init); |