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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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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)