[PATCH 6/8] iommu/dart: Move the blocked domain support to a global static

[Jason Gunthorpe]

Move to the new static global for blocked domains. Move the blocked
specific code to apple_dart_attach_dev_blocked().

Signed-off-by: Jason Gunthorpe <jgg at nvidia.com>
---
 drivers/iommu/apple-dart.c | 36 ++++++++++++++++++++++++++----------
 1 file changed, 26 insertions(+), 10 deletions(-)

diff --git a/drivers/iommu/apple-dart.c b/drivers/iommu/apple-dart.c
index 424f779ccc34df..376f4c5461e8f7 100644
--- a/drivers/iommu/apple-dart.c
+++ b/drivers/iommu/apple-dart.c
@@ -675,10 +675,6 @@ static int apple_dart_attach_dev(struct iommu_domain *domain,
 		for_each_stream_map(i, cfg, stream_map)
 			apple_dart_setup_translation(dart_domain, stream_map);
 		break;
-	case IOMMU_DOMAIN_BLOCKED:
-		for_each_stream_map(i, cfg, stream_map)
-			apple_dart_hw_disable_dma(stream_map);
-		break;
 	default:
 		return -EINVAL;
 	}
@@ -710,6 +706,30 @@ static struct iommu_domain apple_dart_identity_domain = {
 	.ops = &apple_dart_identity_ops,
 };
 
+static int apple_dart_attach_dev_blocked(struct iommu_domain *domain,
+					 struct device *dev)
+{
+	struct apple_dart_master_cfg *cfg = dev_iommu_priv_get(dev);
+	struct apple_dart_stream_map *stream_map;
+	int i;
+
+	if (cfg->stream_maps[0].dart->force_bypass)
+		return -EINVAL;
+
+	for_each_stream_map(i, cfg, stream_map)
+		apple_dart_hw_disable_dma(stream_map);
+	return 0;
+}
+
+static const struct iommu_domain_ops apple_dart_blocked_ops = {
+	.attach_dev = apple_dart_attach_dev_blocked,
+};
+
+static struct iommu_domain apple_dart_blocked_domain = {
+	.type = IOMMU_DOMAIN_BLOCKED,
+	.ops = &apple_dart_blocked_ops,
+};
+
 static struct iommu_device *apple_dart_probe_device(struct device *dev)
 {
 	struct apple_dart_master_cfg *cfg = dev_iommu_priv_get(dev);
@@ -739,8 +759,7 @@ static struct iommu_domain *apple_dart_domain_alloc(unsigned int type)
 {
 	struct apple_dart_domain *dart_domain;
 
-	if (type != IOMMU_DOMAIN_DMA && type != IOMMU_DOMAIN_UNMANAGED &&
-	    type != IOMMU_DOMAIN_BLOCKED)
+	if (type != IOMMU_DOMAIN_DMA && type != IOMMU_DOMAIN_UNMANAGED)
 		return NULL;
 
 	dart_domain = kzalloc(sizeof(*dart_domain), GFP_KERNEL);
@@ -749,10 +768,6 @@ static struct iommu_domain *apple_dart_domain_alloc(unsigned int type)
 
 	mutex_init(&dart_domain->init_lock);
 
-	/* no need to allocate pgtbl_ops or do any other finalization steps */
-	if (type == IOMMU_DOMAIN_BLOCKED)
-		dart_domain->finalized = true;
-
 	return &dart_domain->domain;
 }
 
@@ -966,6 +981,7 @@ static void apple_dart_get_resv_regions(struct device *dev,
 
 static const struct iommu_ops apple_dart_iommu_ops = {
 	.identity_domain = &apple_dart_identity_domain,
+	.blocked_domain = &apple_dart_blocked_domain,
 	.domain_alloc = apple_dart_domain_alloc,
 	.probe_device = apple_dart_probe_device,
 	.release_device = apple_dart_release_device,
-- 
2.42.0