A union is introduced to struct iommu_resv_region to hold any firmware specific data. Also, provided a callback to free up any firmware specific memory allocations. This is in preparation to add support for IORT RMR reserve regions and the union now holds the RMR specific information.
Tested-by: Steven Price <[email protected]> Tested-by: Laurentiu Tudor <[email protected]> Signed-off-by: Shameer Kolothum <[email protected]> --- include/linux/iommu.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 9208eca4b0d1..38f1e043dfaa 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -127,6 +127,11 @@ enum iommu_resv_type { IOMMU_RESV_SW_MSI, }; +struct iommu_iort_rmr_data { + const u32 *sids; /* Stream IDs associated with IORT RMR entry */ + u32 num_sids; +}; + /** * struct iommu_resv_region - descriptor for a reserved memory region * @list: Linked list pointers @@ -134,6 +139,9 @@ enum iommu_resv_type { * @length: Length of the region in bytes * @prot: IOMMU Protection flags (READ/WRITE/...) * @type: Type of the reserved region + * @fw_data: Firmware-specific data + * @resv_region_free_fw_data: Callback to free any firmware specific + * memory allocation */ struct iommu_resv_region { struct list_head list; @@ -141,6 +149,11 @@ struct iommu_resv_region { size_t length; int prot; enum iommu_resv_type type; + union { + struct iommu_iort_rmr_data rmr; + } fw_data; + void (*resv_region_free_fw_data)(struct device *dev, + struct iommu_resv_region *region); }; /** -- 2.17.1 _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
