iommu: remove DOMAIN_ATTR_IO_PGTABLE_CFG

Use an explicit set_pgtable_quirks method instead that just passes
the actual quirk bitmask instead.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Li Yang <leoyang.li@nxp.com>
Link: https://lore.kernel.org/r/20210401155256.298656-20-hch@lst.de
Signed-off-by: Joerg Roedel <jroedel@suse.de>

3 files changed, 23 insertions, 54 deletions

diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.c b/drivers/iommu/arm/arm-smmu/arm-smmu.c
index f17c54a76ef6..3c6adcdb201b 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c
@@ -770,8 +770,8 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain,
 			goto out_clear_smmu;
 	}
 
-	if (smmu_domain->pgtbl_cfg.quirks)
-		pgtbl_cfg.quirks |= smmu_domain->pgtbl_cfg.quirks;
+	if (smmu_domain->pgtbl_quirks)
+		pgtbl_cfg.quirks |= smmu_domain->pgtbl_quirks;
 
 	pgtbl_ops = alloc_io_pgtable_ops(fmt, &pgtbl_cfg, smmu_domain);
 	if (!pgtbl_ops) {
@@ -1484,29 +1484,6 @@ static struct iommu_group *arm_smmu_device_group(struct device *dev)
 	return group;
 }
 
-static int arm_smmu_domain_get_attr(struct iommu_domain *domain,
-				    enum iommu_attr attr, void *data)
-{
-	struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
-
-	switch(domain->type) {
-	case IOMMU_DOMAIN_UNMANAGED:
-		switch (attr) {
-		case DOMAIN_ATTR_IO_PGTABLE_CFG: {
-			struct io_pgtable_domain_attr *pgtbl_cfg = data;
-			*pgtbl_cfg = smmu_domain->pgtbl_cfg;
-
-			return 0;
-		}
-		default:
-			return -ENODEV;
-		}
-		break;
-	default:
-		return -EINVAL;
-	}
-}
-
 static int arm_smmu_enable_nesting(struct iommu_domain *domain)
 {
 	struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
@@ -1522,37 +1499,19 @@ static int arm_smmu_enable_nesting(struct iommu_domain *domain)
 	return ret;
 }
 
-static int arm_smmu_domain_set_attr(struct iommu_domain *domain,
-				    enum iommu_attr attr, void *data)
+static int arm_smmu_set_pgtable_quirks(struct iommu_domain *domain,
+		unsigned long quirks)
 {
-	int ret = 0;
 	struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
+	int ret = 0;
 
 	mutex_lock(&smmu_domain->init_mutex);
-
-	switch(domain->type) {
-	case IOMMU_DOMAIN_UNMANAGED:
-		switch (attr) {
-		case DOMAIN_ATTR_IO_PGTABLE_CFG: {
-			struct io_pgtable_domain_attr *pgtbl_cfg = data;
-
-			if (smmu_domain->smmu) {
-				ret = -EPERM;
-				goto out_unlock;
-			}
-
-			smmu_domain->pgtbl_cfg = *pgtbl_cfg;
-			break;
-		}
-		default:
-			ret = -ENODEV;
-		}
-		break;
-	default:
-		ret = -EINVAL;
-	}
-out_unlock:
+	if (smmu_domain->smmu)
+		ret = -EPERM;
+	else
+		smmu_domain->pgtbl_quirks = quirks;
 	mutex_unlock(&smmu_domain->init_mutex);
+
 	return ret;
 }
 
@@ -1611,9 +1570,8 @@ static struct iommu_ops arm_smmu_ops = {
 	.probe_device		= arm_smmu_probe_device,
 	.release_device		= arm_smmu_release_device,
 	.device_group		= arm_smmu_device_group,
-	.domain_get_attr	= arm_smmu_domain_get_attr,
-	.domain_set_attr	= arm_smmu_domain_set_attr,
 	.enable_nesting		= arm_smmu_enable_nesting,
+	.set_pgtable_quirks	= arm_smmu_set_pgtable_quirks,
 	.of_xlate		= arm_smmu_of_xlate,
 	.get_resv_regions	= arm_smmu_get_resv_regions,
 	.put_resv_regions	= generic_iommu_put_resv_regions,
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.h b/drivers/iommu/arm/arm-smmu/arm-smmu.h
index d2a2d1bc58ba..c31a59d35c64 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu.h
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu.h
@@ -364,7 +364,7 @@ enum arm_smmu_domain_stage {
 struct arm_smmu_domain {
 	struct arm_smmu_device		*smmu;
 	struct io_pgtable_ops		*pgtbl_ops;
-	struct io_pgtable_domain_attr	pgtbl_cfg;
+	unsigned long			pgtbl_quirks;
 	const struct iommu_flush_ops	*flush_ops;
 	struct arm_smmu_cfg		cfg;
 	enum arm_smmu_domain_stage	stage;
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index b09d3f07f3df..7ea5135b1431 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -2701,6 +2701,17 @@ int iommu_enable_nesting(struct iommu_domain *domain)
 }
 EXPORT_SYMBOL_GPL(iommu_enable_nesting);
 
+int iommu_set_pgtable_quirks(struct iommu_domain *domain,
+		unsigned long quirk)
+{
+	if (domain->type != IOMMU_DOMAIN_UNMANAGED)
+		return -EINVAL;
+	if (!domain->ops->set_pgtable_quirks)
+		return -EINVAL;
+	return domain->ops->set_pgtable_quirks(domain, quirk);
+}
+EXPORT_SYMBOL_GPL(iommu_set_pgtable_quirks);
+
 void iommu_get_resv_regions(struct device *dev, struct list_head *list)
 {
 	const struct iommu_ops *ops = dev->bus->iommu_ops;