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authorRobin Murphy <robin.murphy@arm.com>2016-04-13 17:12:57 (GMT)
committerWill Deacon <will.deacon@arm.com>2016-05-03 17:23:01 (GMT)
commit67b65a3fb8e658d00ad1bb06e341f09b1f93a25c (patch)
treee585e1fd41b7c4b9c3bde03b85ec90da61d4c4af /drivers/iommu
parent1bd37a6835bef0ecd2138cb42f9088fd890f9939 (diff)
downloadlinux-67b65a3fb8e658d00ad1bb06e341f09b1f93a25c.tar.xz
iommu/arm-smmu: Differentiate specific implementations
As the inevitable reality of implementation-specific errata workarounds begin to accrue alongside our integration quirk handling, it's about time the driver had a decent way of keeping track. Extend the per-SMMU data so we can identify specific implementations in an efficient and firmware-agnostic manner. Acked-by: Tirumalesh Chalamarla <tchalamarla@caviumnetworks.com> Signed-off-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/arm-smmu.c33
1 files changed, 26 insertions, 7 deletions
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index e933679..2d5f357 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -278,6 +278,10 @@ enum arm_smmu_arch_version {
ARM_SMMU_V2,
};
+enum arm_smmu_implementation {
+ GENERIC_SMMU,
+};
+
struct arm_smmu_smr {
u8 idx;
u16 mask;
@@ -315,6 +319,7 @@ struct arm_smmu_device {
#define ARM_SMMU_OPT_SECURE_CFG_ACCESS (1 << 0)
u32 options;
enum arm_smmu_arch_version version;
+ enum arm_smmu_implementation model;
u32 num_context_banks;
u32 num_s2_context_banks;
@@ -1735,13 +1740,24 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
return 0;
}
+struct arm_smmu_match_data {
+ enum arm_smmu_arch_version version;
+ enum arm_smmu_implementation model;
+};
+
+#define ARM_SMMU_MATCH_DATA(name, ver, imp) \
+static struct arm_smmu_match_data name = { .version = ver, .model = imp }
+
+ARM_SMMU_MATCH_DATA(smmu_generic_v1, ARM_SMMU_V1, GENERIC_SMMU);
+ARM_SMMU_MATCH_DATA(smmu_generic_v2, ARM_SMMU_V2, GENERIC_SMMU);
+
static const struct of_device_id arm_smmu_of_match[] = {
- { .compatible = "arm,smmu-v1", .data = (void *)ARM_SMMU_V1 },
- { .compatible = "arm,smmu-v2", .data = (void *)ARM_SMMU_V2 },
- { .compatible = "arm,mmu-400", .data = (void *)ARM_SMMU_V1 },
- { .compatible = "arm,mmu-401", .data = (void *)ARM_SMMU_V1 },
- { .compatible = "arm,mmu-500", .data = (void *)ARM_SMMU_V2 },
- { .compatible = "cavium,smmu-v2", .data = (void *)ARM_SMMU_V2 },
+ { .compatible = "arm,smmu-v1", .data = &smmu_generic_v1 },
+ { .compatible = "arm,smmu-v2", .data = &smmu_generic_v2 },
+ { .compatible = "arm,mmu-400", .data = &smmu_generic_v1 },
+ { .compatible = "arm,mmu-401", .data = &smmu_generic_v1 },
+ { .compatible = "arm,mmu-500", .data = &smmu_generic_v2 },
+ { .compatible = "cavium,smmu-v2", .data = &smmu_generic_v2 },
{ },
};
MODULE_DEVICE_TABLE(of, arm_smmu_of_match);
@@ -1749,6 +1765,7 @@ MODULE_DEVICE_TABLE(of, arm_smmu_of_match);
static int arm_smmu_device_dt_probe(struct platform_device *pdev)
{
const struct of_device_id *of_id;
+ const struct arm_smmu_match_data *data;
struct resource *res;
struct arm_smmu_device *smmu;
struct device *dev = &pdev->dev;
@@ -1764,7 +1781,9 @@ static int arm_smmu_device_dt_probe(struct platform_device *pdev)
smmu->dev = dev;
of_id = of_match_node(arm_smmu_of_match, dev->of_node);
- smmu->version = (enum arm_smmu_arch_version)of_id->data;
+ data = of_id->data;
+ smmu->version = data->version;
+ smmu->model = data->model;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
smmu->base = devm_ioremap_resource(dev, res);