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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>
This commit is contained in:
Robin Murphy 2016-04-13 18:12:58 +01:00 committed by Will Deacon
parent 67b65a3fb8
commit e086d912d4
1 changed files with 14 additions and 13 deletions
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27
drivers/iommu/arm-smmu.c
View File

@ -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);