diff mbox series

[02/30] ACPI: VIOT: Make a viot_iommu_for_each_id()

Message ID 2-v1-f82a05539a64+5042-iommu_fwspec_p2_jgg@nvidia.com
State Handled Elsewhere
Headers show
Series Make a new API for drivers to use to get their FW | expand

Commit Message

Jason Gunthorpe Nov. 30, 2023, 1:10 a.m. UTC 
Similar to of_iommu_for_each_id() this parses the VIOT ACPI description
and invokes a function over each entry in the table.

Have viot_iommu_configure() use the new function to call
viot_dev_iommu_init().

Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/acpi/viot.c       | 54 +++++++++++++++++++++++----------------
 include/linux/acpi_viot.h | 11 ++++++++
 2 files changed, 43 insertions(+), 22 deletions(-)

Comments

Rafael J. Wysocki Nov. 30, 2023, 1:22 p.m. UTC | #1 
On Thu, Nov 30, 2023 at 2:11 AM Jason Gunthorpe <jgg@nvidia.com> wrote:
>
> Similar to of_iommu_for_each_id() this parses the VIOT ACPI description
> and invokes a function over each entry in the table.
>
> Have viot_iommu_configure() use the new function to call
> viot_dev_iommu_init().
>
> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

> ---
>  drivers/acpi/viot.c       | 54 +++++++++++++++++++++++----------------
>  include/linux/acpi_viot.h | 11 ++++++++
>  2 files changed, 43 insertions(+), 22 deletions(-)
>
> diff --git a/drivers/acpi/viot.c b/drivers/acpi/viot.c
> index c8025921c129b2..7ab35ef05c84e0 100644
> --- a/drivers/acpi/viot.c
> +++ b/drivers/acpi/viot.c
> @@ -25,13 +25,6 @@
>  #include <linux/pci.h>
>  #include <linux/platform_device.h>
>
> -struct viot_iommu {
> -       /* Node offset within the table */
> -       unsigned int                    offset;
> -       struct fwnode_handle            *fwnode;
> -       struct list_head                list;
> -};
> -
>  struct viot_endpoint {
>         union {
>                 /* PCI range */
> @@ -304,10 +297,10 @@ void __init acpi_viot_init(void)
>         acpi_put_table(hdr);
>  }
>
> -static int viot_dev_iommu_init(struct device *dev, struct viot_iommu *viommu,
> -                              u32 epid)
> +static int viot_dev_iommu_init(struct viot_iommu *viommu, u32 epid, void *info)
>  {
>         const struct iommu_ops *ops;
> +       struct device *dev = info;
>
>         if (!viommu)
>                 return -ENODEV;
> @@ -324,11 +317,17 @@ static int viot_dev_iommu_init(struct device *dev, struct viot_iommu *viommu,
>         return acpi_iommu_fwspec_init(dev, epid, viommu->fwnode, ops);
>  }
>
> -static int viot_pci_dev_iommu_init(struct pci_dev *pdev, u16 dev_id, void *data)
> +struct viot_pci_iommu_alias_info {
> +       struct device *dev;
> +       viot_for_each_fn fn;
> +       void *info;
> +};
> +
> +static int __for_each_pci_alias(struct pci_dev *pdev, u16 dev_id, void *data)
>  {
>         u32 epid;
>         struct viot_endpoint *ep;
> -       struct device *aliased_dev = data;
> +       struct viot_pci_iommu_alias_info *info = data;
>         u32 domain_nr = pci_domain_nr(pdev->bus);
>
>         list_for_each_entry(ep, &viot_pci_ranges, list) {
> @@ -339,14 +338,14 @@ static int viot_pci_dev_iommu_init(struct pci_dev *pdev, u16 dev_id, void *data)
>                         epid = ((domain_nr - ep->segment_start) << 16) +
>                                 dev_id - ep->bdf_start + ep->endpoint_id;
>
> -                       return viot_dev_iommu_init(aliased_dev, ep->viommu,
> -                                                  epid);
> +                       return info->fn(ep->viommu, epid, info->info);
>                 }
>         }
>         return -ENODEV;
>  }
>
> -static int viot_mmio_dev_iommu_init(struct platform_device *pdev)
> +static int __for_each_platform(struct platform_device *pdev,
> +                              viot_for_each_fn fn, void *info)
>  {
>         struct resource *mem;
>         struct viot_endpoint *ep;
> @@ -357,12 +356,28 @@ static int viot_mmio_dev_iommu_init(struct platform_device *pdev)
>
>         list_for_each_entry(ep, &viot_mmio_endpoints, list) {
>                 if (ep->address == mem->start)
> -                       return viot_dev_iommu_init(&pdev->dev, ep->viommu,
> -                                                  ep->endpoint_id);
> +                       return fn(ep->viommu, ep->endpoint_id, info);
>         }
>         return -ENODEV;
>  }
>
> +int viot_iommu_for_each_id(struct device *dev, viot_for_each_fn fn, void *info)
> +{
> +       if (dev_is_pci(dev)) {
> +               struct viot_pci_iommu_alias_info pci_info = {
> +                       .dev = dev,
> +                       .fn = fn,
> +                       .info = info,
> +               };
> +               return pci_for_each_dma_alias(to_pci_dev(dev),
> +                                             __for_each_pci_alias, &pci_info);
> +       }
> +
> +       if (dev_is_platform(dev))
> +               return __for_each_platform(to_platform_device(dev), fn, info);
> +       return -ENODEV;
> +}
> +
>  /**
>   * viot_iommu_configure - Setup IOMMU ops for an endpoint described by VIOT
>   * @dev: the endpoint
> @@ -371,10 +386,5 @@ static int viot_mmio_dev_iommu_init(struct platform_device *pdev)
>   */
>  int viot_iommu_configure(struct device *dev)
>  {
> -       if (dev_is_pci(dev))
> -               return pci_for_each_dma_alias(to_pci_dev(dev),
> -                                             viot_pci_dev_iommu_init, dev);
> -       else if (dev_is_platform(dev))
> -               return viot_mmio_dev_iommu_init(to_platform_device(dev));
> -       return -ENODEV;
> +       return viot_iommu_for_each_id(dev, viot_dev_iommu_init, dev);
>  }
> diff --git a/include/linux/acpi_viot.h b/include/linux/acpi_viot.h
> index a5a12243156377..fce4eefcae4aad 100644
> --- a/include/linux/acpi_viot.h
> +++ b/include/linux/acpi_viot.h
> @@ -5,6 +5,17 @@
>
>  #include <linux/acpi.h>
>
> +struct viot_iommu {
> +       /* Node offset within the table */
> +       unsigned int                    offset;
> +       struct fwnode_handle            *fwnode;
> +       struct list_head                list;
> +};
> +
> +typedef int (*viot_for_each_fn)(struct viot_iommu *viommu, u32 epid,
> +                               void *info);
> +int viot_iommu_for_each_id(struct device *dev, viot_for_each_fn fn, void *info);
> +
>  #ifdef CONFIG_ACPI_VIOT
>  void __init acpi_viot_early_init(void);
>  void __init acpi_viot_init(void);
> --
> 2.42.0
>
diff mbox series

Patch

diff --git a/drivers/acpi/viot.c b/drivers/acpi/viot.c
index c8025921c129b2..7ab35ef05c84e0 100644
--- a/drivers/acpi/viot.c
+++ b/drivers/acpi/viot.c
@@ -25,13 +25,6 @@ 
 #include <linux/pci.h>
 #include <linux/platform_device.h>
 
-struct viot_iommu {
-	/* Node offset within the table */
-	unsigned int			offset;
-	struct fwnode_handle		*fwnode;
-	struct list_head		list;
-};
-
 struct viot_endpoint {
 	union {
 		/* PCI range */
@@ -304,10 +297,10 @@  void __init acpi_viot_init(void)
 	acpi_put_table(hdr);
 }
 
-static int viot_dev_iommu_init(struct device *dev, struct viot_iommu *viommu,
-			       u32 epid)
+static int viot_dev_iommu_init(struct viot_iommu *viommu, u32 epid, void *info)
 {
 	const struct iommu_ops *ops;
+	struct device *dev = info;
 
 	if (!viommu)
 		return -ENODEV;
@@ -324,11 +317,17 @@  static int viot_dev_iommu_init(struct device *dev, struct viot_iommu *viommu,
 	return acpi_iommu_fwspec_init(dev, epid, viommu->fwnode, ops);
 }
 
-static int viot_pci_dev_iommu_init(struct pci_dev *pdev, u16 dev_id, void *data)
+struct viot_pci_iommu_alias_info {
+	struct device *dev;
+	viot_for_each_fn fn;
+	void *info;
+};
+
+static int __for_each_pci_alias(struct pci_dev *pdev, u16 dev_id, void *data)
 {
 	u32 epid;
 	struct viot_endpoint *ep;
-	struct device *aliased_dev = data;
+	struct viot_pci_iommu_alias_info *info = data;
 	u32 domain_nr = pci_domain_nr(pdev->bus);
 
 	list_for_each_entry(ep, &viot_pci_ranges, list) {
@@ -339,14 +338,14 @@  static int viot_pci_dev_iommu_init(struct pci_dev *pdev, u16 dev_id, void *data)
 			epid = ((domain_nr - ep->segment_start) << 16) +
 				dev_id - ep->bdf_start + ep->endpoint_id;
 
-			return viot_dev_iommu_init(aliased_dev, ep->viommu,
-						   epid);
+			return info->fn(ep->viommu, epid, info->info);
 		}
 	}
 	return -ENODEV;
 }
 
-static int viot_mmio_dev_iommu_init(struct platform_device *pdev)
+static int __for_each_platform(struct platform_device *pdev,
+			       viot_for_each_fn fn, void *info)
 {
 	struct resource *mem;
 	struct viot_endpoint *ep;
@@ -357,12 +356,28 @@  static int viot_mmio_dev_iommu_init(struct platform_device *pdev)
 
 	list_for_each_entry(ep, &viot_mmio_endpoints, list) {
 		if (ep->address == mem->start)
-			return viot_dev_iommu_init(&pdev->dev, ep->viommu,
-						   ep->endpoint_id);
+			return fn(ep->viommu, ep->endpoint_id, info);
 	}
 	return -ENODEV;
 }
 
+int viot_iommu_for_each_id(struct device *dev, viot_for_each_fn fn, void *info)
+{
+	if (dev_is_pci(dev)) {
+		struct viot_pci_iommu_alias_info pci_info = {
+			.dev = dev,
+			.fn = fn,
+			.info = info,
+		};
+		return pci_for_each_dma_alias(to_pci_dev(dev),
+					      __for_each_pci_alias, &pci_info);
+	}
+
+	if (dev_is_platform(dev))
+		return __for_each_platform(to_platform_device(dev), fn, info);
+	return -ENODEV;
+}
+
 /**
  * viot_iommu_configure - Setup IOMMU ops for an endpoint described by VIOT
  * @dev: the endpoint
@@ -371,10 +386,5 @@  static int viot_mmio_dev_iommu_init(struct platform_device *pdev)
  */
 int viot_iommu_configure(struct device *dev)
 {
-	if (dev_is_pci(dev))
-		return pci_for_each_dma_alias(to_pci_dev(dev),
-					      viot_pci_dev_iommu_init, dev);
-	else if (dev_is_platform(dev))
-		return viot_mmio_dev_iommu_init(to_platform_device(dev));
-	return -ENODEV;
+	return viot_iommu_for_each_id(dev, viot_dev_iommu_init, dev);
 }
diff --git a/include/linux/acpi_viot.h b/include/linux/acpi_viot.h
index a5a12243156377..fce4eefcae4aad 100644
--- a/include/linux/acpi_viot.h
+++ b/include/linux/acpi_viot.h
@@ -5,6 +5,17 @@ 
 
 #include <linux/acpi.h>
 
+struct viot_iommu {
+	/* Node offset within the table */
+	unsigned int			offset;
+	struct fwnode_handle		*fwnode;
+	struct list_head		list;
+};
+
+typedef int (*viot_for_each_fn)(struct viot_iommu *viommu, u32 epid,
+				void *info);
+int viot_iommu_for_each_id(struct device *dev, viot_for_each_fn fn, void *info);
+
 #ifdef CONFIG_ACPI_VIOT
 void __init acpi_viot_early_init(void);
 void __init acpi_viot_init(void);