[PATCH] iommu: Drop the of_iommu_{set/get}_ops() interface

[PATCH] iommu: Drop the of_iommu_{set/get}_ops() interface

[Lorenzo Pieralisi]

With the introduction of the new iommu_{register/get}_instance()
interface in commit e4f10ffe4c9b ("iommu: Make of_iommu_set/get_ops() DT
agnostic") (based on struct fwnode_handle as look-up token, so firmware
agnostic) to register IOMMU instances with the core IOMMU layer there is
no reason to keep the old OF based interface around any longer.

Convert all the IOMMU drivers (and OF IOMMU core code) that rely on the
of_iommu_{set/get}_ops() to the new kernel interface to register/retrieve
IOMMU instances and remove the of_iommu_{set/get}_ops() remaining glue
code in order to complete the interface rework.

Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
---
Exynos, msm and mtk code compile tested only owing to lack of
test platforms, I would appreciate some help in testing this
patch on those platforms before merging it even if it is just
a simple interface conversion.

Thanks,
Lorenzo

 drivers/iommu/exynos-iommu.c |  2 +-
 drivers/iommu/msm_iommu.c    |  2 +-
 drivers/iommu/mtk_iommu.c    |  2 +-
 drivers/iommu/of_iommu.c     |  4 ++--
 include/linux/of_iommu.h     | 11 -----------
 5 files changed, 5 insertions(+), 16 deletions(-)

diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index 57ba0d3..b79e4c4 100644
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -628,7 +628,7 @@ static int __init exynos_sysmmu_probe(struct platform_device *pdev)
 
 	pm_runtime_enable(dev);
 
-	of_iommu_set_ops(dev->of_node, &exynos_iommu_ops);
+	iommu_register_instance(dev->fwnode, &exynos_iommu_ops);
 
 	return 0;
 }
diff --git a/drivers/iommu/msm_iommu.c b/drivers/iommu/msm_iommu.c
index b09692b..9cd3cee 100644
--- a/drivers/iommu/msm_iommu.c
+++ b/drivers/iommu/msm_iommu.c
@@ -737,7 +737,7 @@ static int msm_iommu_probe(struct platform_device *pdev)
 	}
 
 	list_add(&iommu->dev_node, &qcom_iommu_devices);
-	of_iommu_set_ops(pdev->dev.of_node, &msm_iommu_ops);
+	iommu_register_instance(pdev->dev.fwnode, &msm_iommu_ops);
 
 	pr_info("device mapped at %p, irq %d with %d ctx banks\n",
 		iommu->base, iommu->irq, iommu->ncb);
diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index 1479c76..0596ab2 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -655,7 +655,7 @@ static int mtk_iommu_init_fn(struct device_node *np)
 		return ret;
 	}
 
-	of_iommu_set_ops(np, &mtk_iommu_ops);
+	iommu_register_instance(&np->fwnode, &mtk_iommu_ops);
 	return 0;
 }
 
diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c
index 0f57ddc..d7f480a 100644
--- a/drivers/iommu/of_iommu.c
+++ b/drivers/iommu/of_iommu.c
@@ -127,7 +127,7 @@ static const struct iommu_ops
 			   "iommu-map-mask", &iommu_spec.np, iommu_spec.args))
 		return NULL;
 
-	ops = of_iommu_get_ops(iommu_spec.np);
+	ops = iommu_get_instance(&iommu_spec.np->fwnode);
 	if (!ops || !ops->of_xlate ||
 	    iommu_fwspec_init(&pdev->dev, &iommu_spec.np->fwnode, ops) ||
 	    ops->of_xlate(&pdev->dev, &iommu_spec))
@@ -157,7 +157,7 @@ const struct iommu_ops *of_iommu_configure(struct device *dev,
 					   "#iommu-cells", idx,
 					   &iommu_spec)) {
 		np = iommu_spec.np;
-		ops = of_iommu_get_ops(np);
+		ops = iommu_get_instance(&np->fwnode);
 
 		if (!ops || !ops->of_xlate ||
 		    iommu_fwspec_init(dev, &np->fwnode, ops) ||
diff --git a/include/linux/of_iommu.h b/include/linux/of_iommu.h
index 6a7fc50..13394ac 100644
--- a/include/linux/of_iommu.h
+++ b/include/linux/of_iommu.h
@@ -31,17 +31,6 @@ static inline const struct iommu_ops *of_iommu_configure(struct device *dev,
 
 #endif	/* CONFIG_OF_IOMMU */
 
-static inline void of_iommu_set_ops(struct device_node *np,
-				    const struct iommu_ops *ops)
-{
-	iommu_register_instance(&np->fwnode, ops);
-}
-
-static inline const struct iommu_ops *of_iommu_get_ops(struct device_node *np)
-{
-	return iommu_get_instance(&np->fwnode);
-}
-
 extern struct of_device_id __iommu_of_table;
 
 typedef int (*of_iommu_init_fn)(struct device_node *);
-- 
2.10.0

RE: [PATCH] iommu: Drop the of_iommu_{set/get}_ops() interface

[Sricharan]

Hi Lorenzo,

>With the introduction of the new iommu_{register/get}_instance()
>interface in commit e4f10ffe4c9b ("iommu: Make of_iommu_set/get_ops() DT
>agnostic") (based on struct fwnode_handle as look-up token, so firmware
>agnostic) to register IOMMU instances with the core IOMMU layer there is
>no reason to keep the old OF based interface around any longer.
>
>Convert all the IOMMU drivers (and OF IOMMU core code) that rely on the
>of_iommu_{set/get}_ops() to the new kernel interface to register/retrieve
>IOMMU instances and remove the of_iommu_{set/get}_ops() remaining glue
>code in order to complete the interface rework.
>
>Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
>Cc: Matthias Brugger <matthias.bgg@gmail.com>
>Cc: Will Deacon <will.deacon@arm.com>
>Cc: Robin Murphy <robin.murphy@arm.com>
>Cc: Joerg Roedel <joro@8bytes.org>
>Cc: Marek Szyprowski <m.szyprowski@samsung.com>
>---
>Exynos, msm and mtk code compile tested only owing to lack of
>test platforms, I would appreciate some help in testing this
>patch on those platforms before merging it even if it is just
>a simple interface conversion.
>

For msm,
Tested-by: Sricharan R <sricharan@codeaurora.org>

Regards,
 Sricharan

Re: [PATCH] iommu: Drop the of_iommu_{set/get}_ops() interface

[Robin Murphy]

[+Yong Wu for mtk_iommu]

On 03/01/17 17:34, Lorenzo Pieralisi wrote:
> With the introduction of the new iommu_{register/get}_instance()
> interface in commit e4f10ffe4c9b ("iommu: Make of_iommu_set/get_ops() DT
> agnostic") (based on struct fwnode_handle as look-up token, so firmware
> agnostic) to register IOMMU instances with the core IOMMU layer there is
> no reason to keep the old OF based interface around any longer.
> 
> Convert all the IOMMU drivers (and OF IOMMU core code) that rely on the
> of_iommu_{set/get}_ops() to the new kernel interface to register/retrieve
> IOMMU instances and remove the of_iommu_{set/get}_ops() remaining glue
> code in order to complete the interface rework.

Reviewed-by: Robin Murphy <robin.murphy@arm.com>

Looking at before-and-after disassemblies, of_iommu.o is binary
identical, and exynos-iommu.o differs only in the use of dev->fwnode
rather than &dev->of_node->fwnode (and is binary identical if I hack it
back to the latter). I'm not sure why the (GCC 6.2) codegen for
mtk_iommu.o changes quite so much when merely replacing a callsite with
the contents of its static inline callee, but it does :/

Robin.

> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
> Cc: Matthias Brugger <matthias.bgg@gmail.com>
> Cc: Will Deacon <will.deacon@arm.com>
> Cc: Robin Murphy <robin.murphy@arm.com>
> Cc: Joerg Roedel <joro@8bytes.org>
> Cc: Marek Szyprowski <m.szyprowski@samsung.com>
> ---
> Exynos, msm and mtk code compile tested only owing to lack of
> test platforms, I would appreciate some help in testing this
> patch on those platforms before merging it even if it is just
> a simple interface conversion.
> 
> Thanks,
> Lorenzo
> 
>  drivers/iommu/exynos-iommu.c |  2 +-
>  drivers/iommu/msm_iommu.c    |  2 +-
>  drivers/iommu/mtk_iommu.c    |  2 +-
>  drivers/iommu/of_iommu.c     |  4 ++--
>  include/linux/of_iommu.h     | 11 -----------
>  5 files changed, 5 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
> index 57ba0d3..b79e4c4 100644
> --- a/drivers/iommu/exynos-iommu.c
> +++ b/drivers/iommu/exynos-iommu.c
> @@ -628,7 +628,7 @@ static int __init exynos_sysmmu_probe(struct platform_device *pdev)
>  
>  	pm_runtime_enable(dev);
>  
> -	of_iommu_set_ops(dev->of_node, &exynos_iommu_ops);
> +	iommu_register_instance(dev->fwnode, &exynos_iommu_ops);
>  
>  	return 0;
>  }
> diff --git a/drivers/iommu/msm_iommu.c b/drivers/iommu/msm_iommu.c
> index b09692b..9cd3cee 100644
> --- a/drivers/iommu/msm_iommu.c
> +++ b/drivers/iommu/msm_iommu.c
> @@ -737,7 +737,7 @@ static int msm_iommu_probe(struct platform_device *pdev)
>  	}
>  
>  	list_add(&iommu->dev_node, &qcom_iommu_devices);
> -	of_iommu_set_ops(pdev->dev.of_node, &msm_iommu_ops);
> +	iommu_register_instance(pdev->dev.fwnode, &msm_iommu_ops);
>  
>  	pr_info("device mapped at %p, irq %d with %d ctx banks\n",
>  		iommu->base, iommu->irq, iommu->ncb);
> diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
> index 1479c76..0596ab2 100644
> --- a/drivers/iommu/mtk_iommu.c
> +++ b/drivers/iommu/mtk_iommu.c
> @@ -655,7 +655,7 @@ static int mtk_iommu_init_fn(struct device_node *np)
>  		return ret;
>  	}
>  
> -	of_iommu_set_ops(np, &mtk_iommu_ops);
> +	iommu_register_instance(&np->fwnode, &mtk_iommu_ops);
>  	return 0;
>  }
>  
> diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c
> index 0f57ddc..d7f480a 100644
> --- a/drivers/iommu/of_iommu.c
> +++ b/drivers/iommu/of_iommu.c
> @@ -127,7 +127,7 @@ static const struct iommu_ops
>  			   "iommu-map-mask", &iommu_spec.np, iommu_spec.args))
>  		return NULL;
>  
> -	ops = of_iommu_get_ops(iommu_spec.np);
> +	ops = iommu_get_instance(&iommu_spec.np->fwnode);
>  	if (!ops || !ops->of_xlate ||
>  	    iommu_fwspec_init(&pdev->dev, &iommu_spec.np->fwnode, ops) ||
>  	    ops->of_xlate(&pdev->dev, &iommu_spec))
> @@ -157,7 +157,7 @@ const struct iommu_ops *of_iommu_configure(struct device *dev,
>  					   "#iommu-cells", idx,
>  					   &iommu_spec)) {
>  		np = iommu_spec.np;
> -		ops = of_iommu_get_ops(np);
> +		ops = iommu_get_instance(&np->fwnode);
>  
>  		if (!ops || !ops->of_xlate ||
>  		    iommu_fwspec_init(dev, &np->fwnode, ops) ||
> diff --git a/include/linux/of_iommu.h b/include/linux/of_iommu.h
> index 6a7fc50..13394ac 100644
> --- a/include/linux/of_iommu.h
> +++ b/include/linux/of_iommu.h
> @@ -31,17 +31,6 @@ static inline const struct iommu_ops *of_iommu_configure(struct device *dev,
>  
>  #endif	/* CONFIG_OF_IOMMU */
>  
> -static inline void of_iommu_set_ops(struct device_node *np,
> -				    const struct iommu_ops *ops)
> -{
> -	iommu_register_instance(&np->fwnode, ops);
> -}
> -
> -static inline const struct iommu_ops *of_iommu_get_ops(struct device_node *np)
> -{
> -	return iommu_get_instance(&np->fwnode);
> -}
> -
>  extern struct of_device_id __iommu_of_table;
>  
>  typedef int (*of_iommu_init_fn)(struct device_node *);
> 

Re: [PATCH] iommu: Drop the of_iommu_{set/get}_ops() interface

[Will Deacon]

On Tue, Jan 03, 2017 at 05:34:56PM +0000, Lorenzo Pieralisi wrote:
> With the introduction of the new iommu_{register/get}_instance()
> interface in commit e4f10ffe4c9b ("iommu: Make of_iommu_set/get_ops() DT
> agnostic") (based on struct fwnode_handle as look-up token, so firmware
> agnostic) to register IOMMU instances with the core IOMMU layer there is
> no reason to keep the old OF based interface around any longer.
> 
> Convert all the IOMMU drivers (and OF IOMMU core code) that rely on the
> of_iommu_{set/get}_ops() to the new kernel interface to register/retrieve
> IOMMU instances and remove the of_iommu_{set/get}_ops() remaining glue
> code in order to complete the interface rework.
> 
> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
> Cc: Matthias Brugger <matthias.bgg@gmail.com>
> Cc: Will Deacon <will.deacon@arm.com>
> Cc: Robin Murphy <robin.murphy@arm.com>
> Cc: Joerg Roedel <joro@8bytes.org>
> Cc: Marek Szyprowski <m.szyprowski@samsung.com>
> ---
> Exynos, msm and mtk code compile tested only owing to lack of
> test platforms, I would appreciate some help in testing this
> patch on those platforms before merging it even if it is just
> a simple interface conversion.
> 
> Thanks,
> Lorenzo
> 
>  drivers/iommu/exynos-iommu.c |  2 +-
>  drivers/iommu/msm_iommu.c    |  2 +-
>  drivers/iommu/mtk_iommu.c    |  2 +-
>  drivers/iommu/of_iommu.c     |  4 ++--
>  include/linux/of_iommu.h     | 11 -----------
>  5 files changed, 5 insertions(+), 16 deletions(-)

Thanks for following up with this cleanup, Lorenzo. I'll queue it locally,
and send it to Joerg for 4.11 if he doesn't apply it manually before then.

Will

Re: [PATCH] iommu: Drop the of_iommu_{set/get}_ops() interface

[Yong Wu]

On Wed, 2017-01-04 at 15:11 +0000, Robin Murphy wrote:
> [+Yong Wu for mtk_iommu]
> 
> On 03/01/17 17:34, Lorenzo Pieralisi wrote:
> > With the introduction of the new iommu_{register/get}_instance()
> > interface in commit e4f10ffe4c9b ("iommu: Make of_iommu_set/get_ops() DT
> > agnostic") (based on struct fwnode_handle as look-up token, so firmware
> > agnostic) to register IOMMU instances with the core IOMMU layer there is
> > no reason to keep the old OF based interface around any longer.
> > 
> > Convert all the IOMMU drivers (and OF IOMMU core code) that rely on the
> > of_iommu_{set/get}_ops() to the new kernel interface to register/retrieve
> > IOMMU instances and remove the of_iommu_{set/get}_ops() remaining glue
> > code in order to complete the interface rework.
> 
> Reviewed-by: Robin Murphy <robin.murphy@arm.com>
> 
> Looking at before-and-after disassemblies, of_iommu.o is binary
> identical, and exynos-iommu.o differs only in the use of dev->fwnode
> rather than &dev->of_node->fwnode (and is binary identical if I hack it
> back to the latter). I'm not sure why the (GCC 6.2) codegen for
> mtk_iommu.o changes quite so much when merely replacing a callsite with
> the contents of its static inline callee, but it does :/
> 
> Robin.
> 

For MTK IOMMU,

Tested-by: Yong Wu <yong.wu@mediatek.com>

Thanks.

Re: [PATCH] iommu: Drop the of_iommu_{set/get}_ops() interface

[Marek Szyprowski]

Hi Lorenzo,

On 2017-01-03 18:34, Lorenzo Pieralisi wrote:
> With the introduction of the new iommu_{register/get}_instance()
> interface in commit e4f10ffe4c9b ("iommu: Make of_iommu_set/get_ops() DT
> agnostic") (based on struct fwnode_handle as look-up token, so firmware
> agnostic) to register IOMMU instances with the core IOMMU layer there is
> no reason to keep the old OF based interface around any longer.
>
> Convert all the IOMMU drivers (and OF IOMMU core code) that rely on the
> of_iommu_{set/get}_ops() to the new kernel interface to register/retrieve
> IOMMU instances and remove the of_iommu_{set/get}_ops() remaining glue
> code in order to complete the interface rework.
>
> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
> Cc: Matthias Brugger <matthias.bgg@gmail.com>
> Cc: Will Deacon <will.deacon@arm.com>
> Cc: Robin Murphy <robin.murphy@arm.com>
> Cc: Joerg Roedel <joro@8bytes.org>
> Cc: Marek Szyprowski <m.szyprowski@samsung.com>
> ---
> Exynos, msm and mtk code compile tested only owing to lack of
> test platforms, I would appreciate some help in testing this
> patch on those platforms before merging it even if it is just
> a simple interface conversion.

Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>

>
> Thanks,
> Lorenzo
>
>   drivers/iommu/exynos-iommu.c |  2 +-
>   drivers/iommu/msm_iommu.c    |  2 +-
>   drivers/iommu/mtk_iommu.c    |  2 +-
>   drivers/iommu/of_iommu.c     |  4 ++--
>   include/linux/of_iommu.h     | 11 -----------
>   5 files changed, 5 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
> index 57ba0d3..b79e4c4 100644
> --- a/drivers/iommu/exynos-iommu.c
> +++ b/drivers/iommu/exynos-iommu.c
> @@ -628,7 +628,7 @@ static int __init exynos_sysmmu_probe(struct platform_device *pdev)
>   
>   	pm_runtime_enable(dev);
>   
> -	of_iommu_set_ops(dev->of_node, &exynos_iommu_ops);
> +	iommu_register_instance(dev->fwnode, &exynos_iommu_ops);
>   
>   	return 0;
>   }
> diff --git a/drivers/iommu/msm_iommu.c b/drivers/iommu/msm_iommu.c
> index b09692b..9cd3cee 100644
> --- a/drivers/iommu/msm_iommu.c
> +++ b/drivers/iommu/msm_iommu.c
> @@ -737,7 +737,7 @@ static int msm_iommu_probe(struct platform_device *pdev)
>   	}
>   
>   	list_add(&iommu->dev_node, &qcom_iommu_devices);
> -	of_iommu_set_ops(pdev->dev.of_node, &msm_iommu_ops);
> +	iommu_register_instance(pdev->dev.fwnode, &msm_iommu_ops);
>   
>   	pr_info("device mapped at %p, irq %d with %d ctx banks\n",
>   		iommu->base, iommu->irq, iommu->ncb);
> diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
> index 1479c76..0596ab2 100644
> --- a/drivers/iommu/mtk_iommu.c
> +++ b/drivers/iommu/mtk_iommu.c
> @@ -655,7 +655,7 @@ static int mtk_iommu_init_fn(struct device_node *np)
>   		return ret;
>   	}
>   
> -	of_iommu_set_ops(np, &mtk_iommu_ops);
> +	iommu_register_instance(&np->fwnode, &mtk_iommu_ops);
>   	return 0;
>   }
>   
> diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c
> index 0f57ddc..d7f480a 100644
> --- a/drivers/iommu/of_iommu.c
> +++ b/drivers/iommu/of_iommu.c
> @@ -127,7 +127,7 @@ static const struct iommu_ops
>   			   "iommu-map-mask", &iommu_spec.np, iommu_spec.args))
>   		return NULL;
>   
> -	ops = of_iommu_get_ops(iommu_spec.np);
> +	ops = iommu_get_instance(&iommu_spec.np->fwnode);
>   	if (!ops || !ops->of_xlate ||
>   	    iommu_fwspec_init(&pdev->dev, &iommu_spec.np->fwnode, ops) ||
>   	    ops->of_xlate(&pdev->dev, &iommu_spec))
> @@ -157,7 +157,7 @@ const struct iommu_ops *of_iommu_configure(struct device *dev,
>   					   "#iommu-cells", idx,
>   					   &iommu_spec)) {
>   		np = iommu_spec.np;
> -		ops = of_iommu_get_ops(np);
> +		ops = iommu_get_instance(&np->fwnode);
>   
>   		if (!ops || !ops->of_xlate ||
>   		    iommu_fwspec_init(dev, &np->fwnode, ops) ||
> diff --git a/include/linux/of_iommu.h b/include/linux/of_iommu.h
> index 6a7fc50..13394ac 100644
> --- a/include/linux/of_iommu.h
> +++ b/include/linux/of_iommu.h
> @@ -31,17 +31,6 @@ static inline const struct iommu_ops *of_iommu_configure(struct device *dev,
>   
>   #endif	/* CONFIG_OF_IOMMU */
>   
> -static inline void of_iommu_set_ops(struct device_node *np,
> -				    const struct iommu_ops *ops)
> -{
> -	iommu_register_instance(&np->fwnode, ops);
> -}
> -
> -static inline const struct iommu_ops *of_iommu_get_ops(struct device_node *np)
> -{
> -	return iommu_get_instance(&np->fwnode);
> -}
> -
>   extern struct of_device_id __iommu_of_table;
>   
>   typedef int (*of_iommu_init_fn)(struct device_node *);

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland