diff mbox series

[06/15] iommu: Move iommu_fwspec to struct dev_iommu

Message ID 20200310091229.29830-7-joro@8bytes.org (mailing list archive)
State New, archived
Headers show
Series iommu: Move iommu_fwspec out of 'struct device' | expand

Commit Message

Joerg Roedel March 10, 2020, 9:12 a.m. UTC
From: Joerg Roedel <jroedel@suse.de>

Move the iommu_fwspec pointer in struct device into struct dev_iommu.
This is a step in the effort to reduce the iommu related pointers in
struct device to one.

Tested-by: Will Deacon <will@kernel.org> # arm-smmu
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
 drivers/iommu/iommu.c  |  3 +++
 include/linux/device.h |  1 -
 include/linux/iommu.h  | 12 ++++++++----
 3 files changed, 11 insertions(+), 5 deletions(-)

Comments

Jean-Philippe Brucker March 16, 2020, 3:46 p.m. UTC | #1
On Tue, Mar 10, 2020 at 10:12:20AM +0100, Joerg Roedel wrote:
> From: Joerg Roedel <jroedel@suse.de>
> 
> Move the iommu_fwspec pointer in struct device into struct dev_iommu.
> This is a step in the effort to reduce the iommu related pointers in
> struct device to one.
> 
> Tested-by: Will Deacon <will@kernel.org> # arm-smmu
> Signed-off-by: Joerg Roedel <jroedel@suse.de>
> ---
>  drivers/iommu/iommu.c  |  3 +++
>  include/linux/device.h |  1 -
>  include/linux/iommu.h  | 12 ++++++++----
>  3 files changed, 11 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
> index beac2ef063dd..826a67ba247f 100644
> --- a/drivers/iommu/iommu.c
> +++ b/drivers/iommu/iommu.c
> @@ -2405,6 +2405,9 @@ int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode,
>  	if (fwspec)
>  		return ops == fwspec->ops ? 0 : -EINVAL;
>  
> +	if (!dev_iommu_get(dev))
> +		return -ENOMEM;
> +
>  	fwspec = kzalloc(sizeof(*fwspec), GFP_KERNEL);
>  	if (!fwspec)
>  		return -ENOMEM;
> diff --git a/include/linux/device.h b/include/linux/device.h
> index 405a8f11bec1..ca29c39a6480 100644
> --- a/include/linux/device.h
> +++ b/include/linux/device.h
> @@ -613,7 +613,6 @@ struct device {
>  
>  	void	(*release)(struct device *dev);
>  	struct iommu_group	*iommu_group;
> -	struct iommu_fwspec	*iommu_fwspec;
>  	struct dev_iommu	*iommu;
>  
>  	bool			offline_disabled:1;
> diff --git a/include/linux/iommu.h b/include/linux/iommu.h
> index 1c9fa5c1174b..f5edc21a644d 100644
> --- a/include/linux/iommu.h
> +++ b/include/linux/iommu.h
> @@ -368,14 +368,15 @@ struct iommu_fault_param {
>   * struct dev_iommu - Collection of per-device IOMMU data
>   *
>   * @fault_param: IOMMU detected device fault reporting data
> + * @fwspec:	 IOMMU fwspec data
>   *
>   * TODO: migrate other per device data pointers under iommu_dev_data, e.g.
>   *	struct iommu_group	*iommu_group;
> - *	struct iommu_fwspec	*iommu_fwspec;
>   */
>  struct dev_iommu {
>  	struct mutex lock;
> -	struct iommu_fault_param *fault_param;
> +	struct iommu_fault_param	*fault_param;
> +	struct iommu_fwspec		*fwspec;
>  };
>  
>  int  iommu_device_register(struct iommu_device *iommu);
> @@ -614,13 +615,16 @@ const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode);
>  
>  static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev)
>  {
> -	return dev->iommu_fwspec;
> +	if (dev->iommu)
> +		return dev->iommu->fwspec;
> +	else
> +		return NULL;
>  }
>  
>  static inline void dev_iommu_fwspec_set(struct device *dev,
>  					struct iommu_fwspec *fwspec)
>  {
> -	dev->iommu_fwspec = fwspec;
> +	dev->iommu->fwspec = fwspec;

It may be worth moving the set() to iommu.c and prevent any misuse.
Regardless:

Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org>

>  }
>  
>  int iommu_probe_device(struct device *dev);
> -- 
> 2.17.1
>
diff mbox series

Patch

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index beac2ef063dd..826a67ba247f 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -2405,6 +2405,9 @@  int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode,
 	if (fwspec)
 		return ops == fwspec->ops ? 0 : -EINVAL;
 
+	if (!dev_iommu_get(dev))
+		return -ENOMEM;
+
 	fwspec = kzalloc(sizeof(*fwspec), GFP_KERNEL);
 	if (!fwspec)
 		return -ENOMEM;
diff --git a/include/linux/device.h b/include/linux/device.h
index 405a8f11bec1..ca29c39a6480 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -613,7 +613,6 @@  struct device {
 
 	void	(*release)(struct device *dev);
 	struct iommu_group	*iommu_group;
-	struct iommu_fwspec	*iommu_fwspec;
 	struct dev_iommu	*iommu;
 
 	bool			offline_disabled:1;
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 1c9fa5c1174b..f5edc21a644d 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -368,14 +368,15 @@  struct iommu_fault_param {
  * struct dev_iommu - Collection of per-device IOMMU data
  *
  * @fault_param: IOMMU detected device fault reporting data
+ * @fwspec:	 IOMMU fwspec data
  *
  * TODO: migrate other per device data pointers under iommu_dev_data, e.g.
  *	struct iommu_group	*iommu_group;
- *	struct iommu_fwspec	*iommu_fwspec;
  */
 struct dev_iommu {
 	struct mutex lock;
-	struct iommu_fault_param *fault_param;
+	struct iommu_fault_param	*fault_param;
+	struct iommu_fwspec		*fwspec;
 };
 
 int  iommu_device_register(struct iommu_device *iommu);
@@ -614,13 +615,16 @@  const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode);
 
 static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev)
 {
-	return dev->iommu_fwspec;
+	if (dev->iommu)
+		return dev->iommu->fwspec;
+	else
+		return NULL;
 }
 
 static inline void dev_iommu_fwspec_set(struct device *dev,
 					struct iommu_fwspec *fwspec)
 {
-	dev->iommu_fwspec = fwspec;
+	dev->iommu->fwspec = fwspec;
 }
 
 int iommu_probe_device(struct device *dev);