diff mbox series

[v9,04/11] ACPI/IORT: Provide a generic helper to retrieve reserve regions

Message ID 20220404124209.1086-5-shameerali.kolothum.thodi@huawei.com (mailing list archive)
State New, archived
Headers show
Series ACPI/IORT: Support for IORT RMR node | expand

Commit Message

Shameerali Kolothum Thodi April 4, 2022, 12:42 p.m. UTC 
Currently IORT provides a helper to retrieve HW MSI reserve regions.
Change this to a generic helper to retrieve any IORT related reserve
regions. This will be useful when we add support for RMR nodes in
subsequent patches.

Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
---
 drivers/acpi/arm64/iort.c | 23 +++++++++++++++--------
 drivers/iommu/dma-iommu.c |  2 +-
 include/linux/acpi_iort.h |  4 ++--
 3 files changed, 18 insertions(+), 11 deletions(-)

Comments

Lorenzo Pieralisi April 6, 2022, 3:54 p.m. UTC | #1 
On Mon, Apr 04, 2022 at 01:42:02PM +0100, Shameer Kolothum wrote:
> Currently IORT provides a helper to retrieve HW MSI reserve regions.
> Change this to a generic helper to retrieve any IORT related reserve
> regions. This will be useful when we add support for RMR nodes in
> subsequent patches.
> 
> Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
> ---
>  drivers/acpi/arm64/iort.c | 23 +++++++++++++++--------
>  drivers/iommu/dma-iommu.c |  2 +-
>  include/linux/acpi_iort.h |  4 ++--
>  3 files changed, 18 insertions(+), 11 deletions(-)

Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> # for ACPI
IORT

> diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
> index c5ebb2be9a19..63acc3c5b275 100644
> --- a/drivers/acpi/arm64/iort.c
> +++ b/drivers/acpi/arm64/iort.c
> @@ -830,16 +830,13 @@ static struct acpi_iort_node *iort_get_msi_resv_iommu(struct device *dev)
>  	return NULL;
>  }
>  
> -/**
> - * iort_iommu_msi_get_resv_regions - Reserved region driver helper
> - *                                   for HW MSI regions.
> - * @dev: Device from iommu_get_resv_regions()
> - * @head: Reserved region list from iommu_get_resv_regions()
> - *
> +/*
> + * Retrieve platform specific HW MSI reserve regions.
>   * The ITS interrupt translation spaces (ITS_base + SZ_64K, SZ_64K)
>   * associated with the device are the HW MSI reserved regions.
>   */
> -void iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head)
> +static void
> +iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head)
>  {
>  	struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
>  	struct acpi_iort_its_group *its;
> @@ -888,6 +885,16 @@ void iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head)
>  	}
>  }
>  
> +/**
> + * iort_iommu_get_resv_regions - Generic helper to retrieve reserved regions.
> + * @dev: Device from iommu_get_resv_regions()
> + * @head: Reserved region list from iommu_get_resv_regions()
> + */
> +void iort_iommu_get_resv_regions(struct device *dev, struct list_head *head)
> +{
> +	iort_iommu_msi_get_resv_regions(dev, head);
> +}
> +
>  static inline bool iort_iommu_driver_enabled(u8 type)
>  {
>  	switch (type) {
> @@ -1052,7 +1059,7 @@ int iort_iommu_configure_id(struct device *dev, const u32 *id_in)
>  }
>  
>  #else
> -void iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head)
> +void iort_iommu_get_resv_regions(struct device *dev, struct list_head *head)
>  { }
>  int iort_iommu_configure_id(struct device *dev, const u32 *input_id)
>  { return -ENODEV; }
> diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
> index 09f6e1c0f9c0..93d76b666888 100644
> --- a/drivers/iommu/dma-iommu.c
> +++ b/drivers/iommu/dma-iommu.c
> @@ -384,7 +384,7 @@ void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list)
>  {
>  
>  	if (!is_of_node(dev_iommu_fwspec_get(dev)->iommu_fwnode))
> -		iort_iommu_msi_get_resv_regions(dev, list);
> +		iort_iommu_get_resv_regions(dev, list);
>  
>  }
>  EXPORT_SYMBOL(iommu_dma_get_resv_regions);
> diff --git a/include/linux/acpi_iort.h b/include/linux/acpi_iort.h
> index a8198b83753d..e5d2de9caf7f 100644
> --- a/include/linux/acpi_iort.h
> +++ b/include/linux/acpi_iort.h
> @@ -36,7 +36,7 @@ int iort_pmsi_get_dev_id(struct device *dev, u32 *dev_id);
>  /* IOMMU interface */
>  int iort_dma_get_ranges(struct device *dev, u64 *size);
>  int iort_iommu_configure_id(struct device *dev, const u32 *id_in);
> -void iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head);
> +void iort_iommu_get_resv_regions(struct device *dev, struct list_head *head);
>  phys_addr_t acpi_iort_dma_get_max_cpu_address(void);
>  #else
>  static inline void acpi_iort_init(void) { }
> @@ -52,7 +52,7 @@ static inline int iort_dma_get_ranges(struct device *dev, u64 *size)
>  static inline int iort_iommu_configure_id(struct device *dev, const u32 *id_in)
>  { return -ENODEV; }
>  static inline
> -void iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head)
> +void iort_iommu_get_resv_regions(struct device *dev, struct list_head *head)
>  { }
>  
>  static inline phys_addr_t acpi_iort_dma_get_max_cpu_address(void)
> -- 
> 2.25.1
>
diff mbox series

Patch

diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
index c5ebb2be9a19..63acc3c5b275 100644
--- a/drivers/acpi/arm64/iort.c
+++ b/drivers/acpi/arm64/iort.c
@@ -830,16 +830,13 @@  static struct acpi_iort_node *iort_get_msi_resv_iommu(struct device *dev)
 	return NULL;
 }
 
-/**
- * iort_iommu_msi_get_resv_regions - Reserved region driver helper
- *                                   for HW MSI regions.
- * @dev: Device from iommu_get_resv_regions()
- * @head: Reserved region list from iommu_get_resv_regions()
- *
+/*
+ * Retrieve platform specific HW MSI reserve regions.
  * The ITS interrupt translation spaces (ITS_base + SZ_64K, SZ_64K)
  * associated with the device are the HW MSI reserved regions.
  */
-void iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head)
+static void
+iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head)
 {
 	struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
 	struct acpi_iort_its_group *its;
@@ -888,6 +885,16 @@  void iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head)
 	}
 }
 
+/**
+ * iort_iommu_get_resv_regions - Generic helper to retrieve reserved regions.
+ * @dev: Device from iommu_get_resv_regions()
+ * @head: Reserved region list from iommu_get_resv_regions()
+ */
+void iort_iommu_get_resv_regions(struct device *dev, struct list_head *head)
+{
+	iort_iommu_msi_get_resv_regions(dev, head);
+}
+
 static inline bool iort_iommu_driver_enabled(u8 type)
 {
 	switch (type) {
@@ -1052,7 +1059,7 @@  int iort_iommu_configure_id(struct device *dev, const u32 *id_in)
 }
 
 #else
-void iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head)
+void iort_iommu_get_resv_regions(struct device *dev, struct list_head *head)
 { }
 int iort_iommu_configure_id(struct device *dev, const u32 *input_id)
 { return -ENODEV; }
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index 09f6e1c0f9c0..93d76b666888 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -384,7 +384,7 @@  void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list)
 {
 
 	if (!is_of_node(dev_iommu_fwspec_get(dev)->iommu_fwnode))
-		iort_iommu_msi_get_resv_regions(dev, list);
+		iort_iommu_get_resv_regions(dev, list);
 
 }
 EXPORT_SYMBOL(iommu_dma_get_resv_regions);
diff --git a/include/linux/acpi_iort.h b/include/linux/acpi_iort.h
index a8198b83753d..e5d2de9caf7f 100644
--- a/include/linux/acpi_iort.h
+++ b/include/linux/acpi_iort.h
@@ -36,7 +36,7 @@  int iort_pmsi_get_dev_id(struct device *dev, u32 *dev_id);
 /* IOMMU interface */
 int iort_dma_get_ranges(struct device *dev, u64 *size);
 int iort_iommu_configure_id(struct device *dev, const u32 *id_in);
-void iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head);
+void iort_iommu_get_resv_regions(struct device *dev, struct list_head *head);
 phys_addr_t acpi_iort_dma_get_max_cpu_address(void);
 #else
 static inline void acpi_iort_init(void) { }
@@ -52,7 +52,7 @@  static inline int iort_dma_get_ranges(struct device *dev, u64 *size)
 static inline int iort_iommu_configure_id(struct device *dev, const u32 *id_in)
 { return -ENODEV; }
 static inline
-void iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head)
+void iort_iommu_get_resv_regions(struct device *dev, struct list_head *head)
 { }
 
 static inline phys_addr_t acpi_iort_dma_get_max_cpu_address(void)