diff options
| author | Robin Murphy <robin.murphy@arm.com> | 2016-04-13 18:12:58 +0100 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2016-05-03 18:23:02 +0100 |
| commit | e086d912d4d78781652669618e7fb01a4d466703 (patch) | |
| tree | 62c6f3a338ef1a07f1bd3b7fac2f252353b8350e /drivers/iommu | |
| parent | 67b65a3fb8e658d00ad1bb06e341f09b1f93a25c (diff) | |
| download | linux-e086d912d4d78781652669618e7fb01a4d466703.tar.bz2 | |
iommu/arm-smmu: Convert ThunderX workaround to new method
With a framework for implementation-specific funtionality in place, the
currently-FDT-dependent ThunderX workaround gets to be the first user.
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 | 27 |
1 files changed, 14 insertions, 13 deletions
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index 2d5f357de69c..d8bc20a0efb9 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -280,6 +280,7 @@ enum arm_smmu_arch_version { enum arm_smmu_implementation { GENERIC_SMMU, + CAVIUM_SMMUV2, }; struct arm_smmu_smr { @@ -1686,6 +1687,17 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu) } dev_notice(smmu->dev, "\t%u context banks (%u stage-2 only)\n", smmu->num_context_banks, smmu->num_s2_context_banks); + /* + * Cavium CN88xx erratum #27704. + * Ensure ASID and VMID allocation is unique across all SMMUs in + * the system. + */ + if (smmu->model == CAVIUM_SMMUV2) { + smmu->cavium_id_base = + atomic_add_return(smmu->num_context_banks, + &cavium_smmu_context_count); + smmu->cavium_id_base -= smmu->num_context_banks; + } /* ID2 */ id = readl_relaxed(gr0_base + ARM_SMMU_GR0_ID2); @@ -1750,6 +1762,7 @@ 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); +ARM_SMMU_MATCH_DATA(cavium_smmuv2, ARM_SMMU_V2, CAVIUM_SMMUV2); static const struct of_device_id arm_smmu_of_match[] = { { .compatible = "arm,smmu-v1", .data = &smmu_generic_v1 }, @@ -1757,7 +1770,7 @@ static const struct of_device_id arm_smmu_of_match[] = { { .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 }, + { .compatible = "cavium,smmu-v2", .data = &cavium_smmuv2 }, { }, }; MODULE_DEVICE_TABLE(of, arm_smmu_of_match); @@ -1871,18 +1884,6 @@ static int arm_smmu_device_dt_probe(struct platform_device *pdev) } } - /* - * Cavium CN88xx erratum #27704. - * Ensure ASID and VMID allocation is unique across all SMMUs in - * the system. - */ - if (of_device_is_compatible(dev->of_node, "cavium,smmu-v2")) { - smmu->cavium_id_base = - atomic_add_return(smmu->num_context_banks, - &cavium_smmu_context_count); - smmu->cavium_id_base -= smmu->num_context_banks; - } - INIT_LIST_HEAD(&smmu->list); spin_lock(&arm_smmu_devices_lock); list_add(&smmu->list, &arm_smmu_devices); |