diff mbox series

[5/8] iommu/dart: Use static global identity domains

Message ID 5-v1-8060f06462cc+c0a39-dart_paging_jgg@nvidia.com (mailing list archive)
State New, archived
Headers show
Series iommu: Convert dart & iommufd to the new domain_alloc_paging() | expand

Commit Message

Jason Gunthorpe Sept. 22, 2023, 5:07 p.m. UTC 
Move to the new static global for identity domains. Move the identity
specific code to apple_dart_attach_dev_identity().

Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/iommu/apple-dart.c | 41 ++++++++++++++++++++++++++++----------
 1 file changed, 30 insertions(+), 11 deletions(-)

Comments

Janne Grunau Sept. 26, 2023, 6:49 p.m. UTC | #1 
Hej,

On Fri, Sep 22, 2023 at 02:07:56PM -0300, Jason Gunthorpe wrote:
> Move to the new static global for identity domains. Move the identity
> specific code to apple_dart_attach_dev_identity().
> 
> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
> ---
>  drivers/iommu/apple-dart.c | 41 ++++++++++++++++++++++++++++----------
>  1 file changed, 30 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/iommu/apple-dart.c b/drivers/iommu/apple-dart.c
> index 6bc2ad2207c3da..424f779ccc34df 100644
> --- a/drivers/iommu/apple-dart.c
> +++ b/drivers/iommu/apple-dart.c
> @@ -658,11 +658,7 @@ static int apple_dart_attach_dev(struct iommu_domain *domain,
>  	struct apple_dart_master_cfg *cfg = dev_iommu_priv_get(dev);
>  	struct apple_dart_domain *dart_domain = to_dart_domain(domain);
>  
> -	if (cfg->stream_maps[0].dart->force_bypass &&
> -	    domain->type != IOMMU_DOMAIN_IDENTITY)
> -		return -EINVAL;
> -	if (!cfg->stream_maps[0].dart->supports_bypass &&
> -	    domain->type == IOMMU_DOMAIN_IDENTITY)
> +	if (cfg->stream_maps[0].dart->force_bypass)
>  		return -EINVAL;
>  
>  	ret = apple_dart_finalize_domain(domain, cfg);
> @@ -683,15 +679,37 @@ static int apple_dart_attach_dev(struct iommu_domain *domain,
>  		for_each_stream_map(i, cfg, stream_map)
>  			apple_dart_hw_disable_dma(stream_map);
>  		break;
> -	case IOMMU_DOMAIN_IDENTITY:
> -		for_each_stream_map(i, cfg, stream_map)
> -			apple_dart_hw_enable_bypass(stream_map);
> -		break;
> +	default:
> +		return -EINVAL;
>  	}
>  
>  	return ret;
>  }
>  
> +static int apple_dart_attach_dev_identity(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->supports_bypass)
> +		return -EINVAL;
> +
> +	for_each_stream_map(i, cfg, stream_map)
> +		apple_dart_hw_enable_bypass(stream_map);
> +	return 0;
> +}
> +
> +static const struct iommu_domain_ops apple_dart_identity_ops = {
> +	.attach_dev = apple_dart_attach_dev_identity,
> +};
> +
> +static struct iommu_domain apple_dart_identity_domain = {
> +	.type = IOMMU_DOMAIN_IDENTITY,
> +	.ops = &apple_dart_identity_ops,
> +};
> +
>  static struct iommu_device *apple_dart_probe_device(struct device *dev)
>  {
>  	struct apple_dart_master_cfg *cfg = dev_iommu_priv_get(dev);
> @@ -722,7 +740,7 @@ 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_IDENTITY && type != IOMMU_DOMAIN_BLOCKED)
> +	    type != IOMMU_DOMAIN_BLOCKED)
>  		return NULL;
>  
>  	dart_domain = kzalloc(sizeof(*dart_domain), GFP_KERNEL);
> @@ -732,7 +750,7 @@ 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_IDENTITY || type == IOMMU_DOMAIN_BLOCKED)
> +	if (type == IOMMU_DOMAIN_BLOCKED)
>  		dart_domain->finalized = true;
>  
>  	return &dart_domain->domain;
> @@ -947,6 +965,7 @@ 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,
>  	.domain_alloc = apple_dart_domain_alloc,
>  	.probe_device = apple_dart_probe_device,
>  	.release_device = apple_dart_release_device,

Reviewed-by: Janne Grunau <j@jannau.net>

best reagrds,
Janne
diff mbox series

Patch

diff --git a/drivers/iommu/apple-dart.c b/drivers/iommu/apple-dart.c
index 6bc2ad2207c3da..424f779ccc34df 100644
--- a/drivers/iommu/apple-dart.c
+++ b/drivers/iommu/apple-dart.c
@@ -658,11 +658,7 @@  static int apple_dart_attach_dev(struct iommu_domain *domain,
 	struct apple_dart_master_cfg *cfg = dev_iommu_priv_get(dev);
 	struct apple_dart_domain *dart_domain = to_dart_domain(domain);
 
-	if (cfg->stream_maps[0].dart->force_bypass &&
-	    domain->type != IOMMU_DOMAIN_IDENTITY)
-		return -EINVAL;
-	if (!cfg->stream_maps[0].dart->supports_bypass &&
-	    domain->type == IOMMU_DOMAIN_IDENTITY)
+	if (cfg->stream_maps[0].dart->force_bypass)
 		return -EINVAL;
 
 	ret = apple_dart_finalize_domain(domain, cfg);
@@ -683,15 +679,37 @@  static int apple_dart_attach_dev(struct iommu_domain *domain,
 		for_each_stream_map(i, cfg, stream_map)
 			apple_dart_hw_disable_dma(stream_map);
 		break;
-	case IOMMU_DOMAIN_IDENTITY:
-		for_each_stream_map(i, cfg, stream_map)
-			apple_dart_hw_enable_bypass(stream_map);
-		break;
+	default:
+		return -EINVAL;
 	}
 
 	return ret;
 }
 
+static int apple_dart_attach_dev_identity(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->supports_bypass)
+		return -EINVAL;
+
+	for_each_stream_map(i, cfg, stream_map)
+		apple_dart_hw_enable_bypass(stream_map);
+	return 0;
+}
+
+static const struct iommu_domain_ops apple_dart_identity_ops = {
+	.attach_dev = apple_dart_attach_dev_identity,
+};
+
+static struct iommu_domain apple_dart_identity_domain = {
+	.type = IOMMU_DOMAIN_IDENTITY,
+	.ops = &apple_dart_identity_ops,
+};
+
 static struct iommu_device *apple_dart_probe_device(struct device *dev)
 {
 	struct apple_dart_master_cfg *cfg = dev_iommu_priv_get(dev);
@@ -722,7 +740,7 @@  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_IDENTITY && type != IOMMU_DOMAIN_BLOCKED)
+	    type != IOMMU_DOMAIN_BLOCKED)
 		return NULL;
 
 	dart_domain = kzalloc(sizeof(*dart_domain), GFP_KERNEL);
@@ -732,7 +750,7 @@  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_IDENTITY || type == IOMMU_DOMAIN_BLOCKED)
+	if (type == IOMMU_DOMAIN_BLOCKED)
 		dart_domain->finalized = true;
 
 	return &dart_domain->domain;
@@ -947,6 +965,7 @@  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,
 	.domain_alloc = apple_dart_domain_alloc,
 	.probe_device = apple_dart_probe_device,
 	.release_device = apple_dart_release_device,