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ACPI/IORT: Provide a generic helper to retrieve reserve regions

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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.

[Lorenzo: For ACPI IORT]

Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Tested-by: Steven Price <steven.price@arm.com>
Tested-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Tested-by: Hanjun Guo <guohanjun@huawei.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Acked-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/20220615101044.1972-4-shameerali.kolothum.thodi@huawei.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Shameer Kolothum 2022-06-15 11:10:38 +01:00 committed by Joerg Roedel
parent 8778b1d481
commit 55be25b8b5
3 changed files with 18 additions and 10 deletions
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22
drivers/acpi/arm64/iort.c
View file

@ -806,15 +806,13 @@ 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
* @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;
@ -863,6 +861,16 @@ 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) {
@ -1027,7 +1035,7 @@ 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; }

2
drivers/iommu/dma-iommu.c
View file

@ -387,7 +387,7 @@ 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);

4
include/linux/acpi_iort.h
View file

@ -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)