[PATCH v2 6/9] 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().

Reviewed-by: Janne Grunau <j...@jannau.net>
Signed-off-by: Jason Gunthorpe <j...@nvidia.com>
---
 drivers/iommu/apple-dart.c | 53 +++++++++++++++++++++++---------------
 1 file changed, 32 insertions(+), 21 deletions(-)

diff --git a/drivers/iommu/apple-dart.c b/drivers/iommu/apple-dart.c
index 2c121c525749cf..a34812e8c9ea57 100644
--- a/drivers/iommu/apple-dart.c
+++ b/drivers/iommu/apple-dart.c
@@ -666,22 +666,13 @@ static int apple_dart_attach_dev(struct iommu_domain 
*domain,
        if (ret)
                return ret;
 
-       switch (domain->type) {
-       default:
-               ret = apple_dart_domain_add_streams(dart_domain, cfg);
-               if (ret)
-                       return ret;
+       ret = apple_dart_domain_add_streams(dart_domain, cfg);
+       if (ret)
+               return ret;
 
-               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;
-       }
-
-       return ret;
+       for_each_stream_map(i, cfg, stream_map)
+               apple_dart_setup_translation(dart_domain, stream_map);
+       return 0;
 }
 
 static int apple_dart_attach_dev_identity(struct iommu_domain *domain,
@@ -708,6 +699,30 @@ 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);
@@ -737,8 +752,7 @@ 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);
@@ -747,10 +761,6 @@ 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;
 }
 
@@ -964,6 +974,7 @@ 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