diff options
Diffstat (limited to 'drivers/iommu/tegra-smmu.c')
| -rw-r--r-- | drivers/iommu/tegra-smmu.c | 47 |
1 files changed, 26 insertions, 21 deletions
diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c index 76887a73b47a..c845d99ecf6b 100644 --- a/drivers/iommu/tegra-smmu.c +++ b/drivers/iommu/tegra-smmu.c @@ -34,7 +34,7 @@ struct tegra_smmu { }; struct tegra_smmu_as { - struct iommu_domain *domain; + struct iommu_domain domain; struct tegra_smmu *smmu; unsigned int use_count; struct page *count; @@ -43,6 +43,11 @@ struct tegra_smmu_as { u32 attr; }; +static struct tegra_smmu_as *to_smmu_as(struct iommu_domain *dom) +{ + return container_of(dom, struct tegra_smmu_as, domain); +} + static inline void smmu_writel(struct tegra_smmu *smmu, u32 value, unsigned long offset) { @@ -225,30 +230,32 @@ static bool tegra_smmu_capable(enum iommu_cap cap) return false; } -static int tegra_smmu_domain_init(struct iommu_domain *domain) +static struct iommu_domain *tegra_smmu_domain_alloc(unsigned type) { struct tegra_smmu_as *as; unsigned int i; uint32_t *pd; + if (type != IOMMU_DOMAIN_UNMANAGED) + return NULL; + as = kzalloc(sizeof(*as), GFP_KERNEL); if (!as) - return -ENOMEM; + return NULL; as->attr = SMMU_PD_READABLE | SMMU_PD_WRITABLE | SMMU_PD_NONSECURE; - as->domain = domain; as->pd = alloc_page(GFP_KERNEL | __GFP_DMA); if (!as->pd) { kfree(as); - return -ENOMEM; + return NULL; } as->count = alloc_page(GFP_KERNEL); if (!as->count) { __free_page(as->pd); kfree(as); - return -ENOMEM; + return NULL; } /* clear PDEs */ @@ -265,19 +272,17 @@ static int tegra_smmu_domain_init(struct iommu_domain *domain) for (i = 0; i < SMMU_NUM_PDE; i++) pd[i] = 0; - domain->priv = as; - /* setup aperture */ - domain->geometry.aperture_start = 0; - domain->geometry.aperture_end = 0xffffffff; - domain->geometry.force_aperture = true; + as->domain.geometry.aperture_start = 0; + as->domain.geometry.aperture_end = 0xffffffff; + as->domain.geometry.force_aperture = true; - return 0; + return &as->domain; } -static void tegra_smmu_domain_destroy(struct iommu_domain *domain) +static void tegra_smmu_domain_free(struct iommu_domain *domain) { - struct tegra_smmu_as *as = domain->priv; + struct tegra_smmu_as *as = to_smmu_as(domain); /* TODO: free page directory and page tables */ ClearPageReserved(as->pd); @@ -401,7 +406,7 @@ static int tegra_smmu_attach_dev(struct iommu_domain *domain, struct device *dev) { struct tegra_smmu *smmu = dev->archdata.iommu; - struct tegra_smmu_as *as = domain->priv; + struct tegra_smmu_as *as = to_smmu_as(domain); struct device_node *np = dev->of_node; struct of_phandle_args args; unsigned int index = 0; @@ -434,7 +439,7 @@ static int tegra_smmu_attach_dev(struct iommu_domain *domain, static void tegra_smmu_detach_dev(struct iommu_domain *domain, struct device *dev) { - struct tegra_smmu_as *as = domain->priv; + struct tegra_smmu_as *as = to_smmu_as(domain); struct device_node *np = dev->of_node; struct tegra_smmu *smmu = as->smmu; struct of_phandle_args args; @@ -530,7 +535,7 @@ static void as_put_pte(struct tegra_smmu_as *as, dma_addr_t iova) static int tegra_smmu_map(struct iommu_domain *domain, unsigned long iova, phys_addr_t paddr, size_t size, int prot) { - struct tegra_smmu_as *as = domain->priv; + struct tegra_smmu_as *as = to_smmu_as(domain); struct tegra_smmu *smmu = as->smmu; unsigned long offset; struct page *page; @@ -554,7 +559,7 @@ static int tegra_smmu_map(struct iommu_domain *domain, unsigned long iova, static size_t tegra_smmu_unmap(struct iommu_domain *domain, unsigned long iova, size_t size) { - struct tegra_smmu_as *as = domain->priv; + struct tegra_smmu_as *as = to_smmu_as(domain); struct tegra_smmu *smmu = as->smmu; unsigned long offset; struct page *page; @@ -578,7 +583,7 @@ static size_t tegra_smmu_unmap(struct iommu_domain *domain, unsigned long iova, static phys_addr_t tegra_smmu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova) { - struct tegra_smmu_as *as = domain->priv; + struct tegra_smmu_as *as = to_smmu_as(domain); struct page *page; unsigned long pfn; u32 *pte; @@ -639,8 +644,8 @@ static void tegra_smmu_remove_device(struct device *dev) static const struct iommu_ops tegra_smmu_ops = { .capable = tegra_smmu_capable, - .domain_init = tegra_smmu_domain_init, - .domain_destroy = tegra_smmu_domain_destroy, + .domain_alloc = tegra_smmu_domain_alloc, + .domain_free = tegra_smmu_domain_free, .attach_dev = tegra_smmu_attach_dev, .detach_dev = tegra_smmu_detach_dev, .add_device = tegra_smmu_add_device, |