summaryrefslogtreecommitdiffstats
path: root/drivers/iommu/tegra-smmu.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/iommu/tegra-smmu.c')
-rw-r--r--drivers/iommu/tegra-smmu.c58
1 files changed, 42 insertions, 16 deletions
diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c
index e445f80d02..310871728a 100644
--- a/drivers/iommu/tegra-smmu.c
+++ b/drivers/iommu/tegra-smmu.c
@@ -272,13 +272,10 @@ static void tegra_smmu_free_asid(struct tegra_smmu *smmu, unsigned int id)
clear_bit(id, smmu->asids);
}
-static struct iommu_domain *tegra_smmu_domain_alloc(unsigned type)
+static struct iommu_domain *tegra_smmu_domain_alloc_paging(struct device *dev)
{
struct tegra_smmu_as *as;
- if (type != IOMMU_DOMAIN_UNMANAGED)
- return NULL;
-
as = kzalloc(sizeof(*as), GFP_KERNEL);
if (!as)
return NULL;
@@ -511,23 +508,39 @@ disable:
return err;
}
-static void tegra_smmu_set_platform_dma(struct device *dev)
+static int tegra_smmu_identity_attach(struct iommu_domain *identity_domain,
+ struct device *dev)
{
struct iommu_domain *domain = iommu_get_domain_for_dev(dev);
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
- struct tegra_smmu_as *as = to_smmu_as(domain);
- struct tegra_smmu *smmu = as->smmu;
+ struct tegra_smmu_as *as;
+ struct tegra_smmu *smmu;
unsigned int index;
if (!fwspec)
- return;
+ return -ENODEV;
+ if (domain == identity_domain || !domain)
+ return 0;
+
+ as = to_smmu_as(domain);
+ smmu = as->smmu;
for (index = 0; index < fwspec->num_ids; index++) {
tegra_smmu_disable(smmu, fwspec->ids[index], as->id);
tegra_smmu_as_unprepare(smmu, as);
}
+ return 0;
}
+static struct iommu_domain_ops tegra_smmu_identity_ops = {
+ .attach_dev = tegra_smmu_identity_attach,
+};
+
+static struct iommu_domain tegra_smmu_identity_domain = {
+ .type = IOMMU_DOMAIN_IDENTITY,
+ .ops = &tegra_smmu_identity_ops,
+};
+
static void tegra_smmu_set_pde(struct tegra_smmu_as *as, unsigned long iova,
u32 value)
{
@@ -751,7 +764,8 @@ __tegra_smmu_unmap(struct iommu_domain *domain, unsigned long iova,
}
static int tegra_smmu_map(struct iommu_domain *domain, unsigned long iova,
- phys_addr_t paddr, size_t size, int prot, gfp_t gfp)
+ phys_addr_t paddr, size_t size, size_t count,
+ int prot, gfp_t gfp, size_t *mapped)
{
struct tegra_smmu_as *as = to_smmu_as(domain);
unsigned long flags;
@@ -761,11 +775,14 @@ static int tegra_smmu_map(struct iommu_domain *domain, unsigned long iova,
ret = __tegra_smmu_map(domain, iova, paddr, size, prot, gfp, &flags);
spin_unlock_irqrestore(&as->lock, flags);
+ if (!ret)
+ *mapped = size;
+
return ret;
}
static size_t tegra_smmu_unmap(struct iommu_domain *domain, unsigned long iova,
- size_t size, struct iommu_iotlb_gather *gather)
+ size_t size, size_t count, struct iommu_iotlb_gather *gather)
{
struct tegra_smmu_as *as = to_smmu_as(domain);
unsigned long flags;
@@ -962,17 +979,28 @@ static int tegra_smmu_of_xlate(struct device *dev,
return iommu_fwspec_add_ids(dev, &id, 1);
}
+static int tegra_smmu_def_domain_type(struct device *dev)
+{
+ /*
+ * FIXME: For now we want to run all translation in IDENTITY mode, due
+ * to some device quirks. Better would be to just quirk the troubled
+ * devices.
+ */
+ return IOMMU_DOMAIN_IDENTITY;
+}
+
static const struct iommu_ops tegra_smmu_ops = {
- .domain_alloc = tegra_smmu_domain_alloc,
+ .identity_domain = &tegra_smmu_identity_domain,
+ .def_domain_type = &tegra_smmu_def_domain_type,
+ .domain_alloc_paging = tegra_smmu_domain_alloc_paging,
.probe_device = tegra_smmu_probe_device,
.device_group = tegra_smmu_device_group,
- .set_platform_dma_ops = tegra_smmu_set_platform_dma,
.of_xlate = tegra_smmu_of_xlate,
.pgsize_bitmap = SZ_4K,
.default_domain_ops = &(const struct iommu_domain_ops) {
.attach_dev = tegra_smmu_attach_dev,
- .map = tegra_smmu_map,
- .unmap = tegra_smmu_unmap,
+ .map_pages = tegra_smmu_map,
+ .unmap_pages = tegra_smmu_unmap,
.iova_to_phys = tegra_smmu_iova_to_phys,
.free = tegra_smmu_domain_free,
}
@@ -1056,8 +1084,6 @@ DEFINE_SHOW_ATTRIBUTE(tegra_smmu_clients);
static void tegra_smmu_debugfs_init(struct tegra_smmu *smmu)
{
smmu->debugfs = debugfs_create_dir("smmu", NULL);
- if (!smmu->debugfs)
- return;
debugfs_create_file("swgroups", S_IRUGO, smmu->debugfs, smmu,
&tegra_smmu_swgroups_fops);