diff options
| author | Robin Murphy <robin.murphy@arm.com> | 2016-04-13 20:12:57 +0300 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2016-05-03 20:23:01 +0300 |
| commit | 67b65a3fb8e658d00ad1bb06e341f09b1f93a25c (patch) | |
| tree | e585e1fd41b7c4b9c3bde03b85ec90da61d4c4af /drivers/iommu | |
| parent | 1bd37a6835bef0ecd2138cb42f9088fd890f9939 (diff) | |
| download | linux-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.c | 33 |
1 files changed, 26 insertions, 7 deletions
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index e933679a3266..2d5f357de69c 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); |