[PATCH 16/23] iommu/tegra: smmu: Get "nvidia,swgroups" from DT
From: Hiroshi Doyu <hidden>
Date: 2013-06-26 09:28:19
Also in:
linux-iommu, linux-tegra
Subsystem:
iommu subsystem, tegra iommu drivers, the rest · Maintainers:
Joerg Roedel, Will Deacon, Thierry Reding, Linus Torvalds
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 <redacted> --- 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