Get "nvidia,swgroups" from DT, which indicates which HardWare
Accelerators(HWAs) can be available on specific Tegra SoC. Needed for
the unified SMMU driver.
Signed-off-by: Hiroshi Doyu <hdoyu@xxxxxxxxxx>
---
drivers/iommu/tegra-smmu.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c
index 95c6c80..c67131e 100644
--- a/drivers/iommu/tegra-smmu.c
+++ b/drivers/iommu/tegra-smmu.c
@@ -307,6 +307,8 @@ struct smmu_device {
struct device *dev;
struct page *avp_vector_page; /* dummy page shared by all AS's */
+ u64 swgroups; /* swgroup ID bitmap */
+
/*
* Register image savers for suspend/resume
*/
@@ -1210,6 +1212,7 @@ static int tegra_smmu_probe(struct platform_device *pdev)
int i, asids, err = 0;
dma_addr_t uninitialized_var(base);
size_t bytes, uninitialized_var(size);
+ u64 swgroups;
if (smmu_handle)
return -EIO;
@@ -1219,6 +1222,9 @@ static int tegra_smmu_probe(struct platform_device *pdev)
if (of_property_read_u32(dev->of_node, "nvidia,#asids", &asids))
return -ENODEV;
+ if (of_property_read_u64(dev->of_node, "nvidia,swgroups", &swgroups))
+ return -ENODEV;
+
bytes = sizeof(*smmu) + asids * (sizeof(*smmu->as) +
sizeof(struct dma_iommu_mapping *));
smmu = devm_kzalloc(dev, bytes, GFP_KERNEL);
@@ -1267,6 +1273,7 @@ static int tegra_smmu_probe(struct platform_device *pdev)
smmu->num_as = asids;
smmu->iovmm_base = base;
smmu->page_count = size;
+ smmu->swgroups = swgroups;
smmu->translation_enable_0 = ~0;
smmu->translation_enable_1 = ~0;
--
1.8.1.5
--
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