Messages in this thread Patch in this message |  | | From | Georgi Djakov <> | Subject | [PATCH v7 02/15] iommu: Add an unmap_pages() op for IOMMU drivers | Date | Wed, 16 Jun 2021 06:38:43 -0700 |
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From: "Isaac J. Manjarres" <isaacm@codeaurora.org>
Add a callback for IOMMU drivers to provide a path for the IOMMU framework to call into an IOMMU driver, which can call into the io-pgtable code, to unmap a virtually contiguous range of pages of the same size.
For IOMMU drivers that do not specify an unmap_pages() callback, the existing logic of unmapping memory one page block at a time will be used.
Signed-off-by: Isaac J. Manjarres <isaacm@codeaurora.org> Suggested-by: Will Deacon <will@kernel.org> Signed-off-by: Will Deacon <will@kernel.org> Acked-by: Lu Baolu <baolu.lu@linux.intel.com> Signed-off-by: Georgi Djakov <quic_c_gdjako@quicinc.com> --- include/linux/iommu.h | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 32d448050bf7..25a844121be5 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -181,6 +181,7 @@ struct iommu_iotlb_gather { * @detach_dev: detach device from an iommu domain * @map: map a physically contiguous memory region to an iommu domain * @unmap: unmap a physically contiguous memory region from an iommu domain + * @unmap_pages: unmap a number of pages of the same size from an iommu domain * @flush_iotlb_all: Synchronously flush all hardware TLBs for this domain * @iotlb_sync_map: Sync mappings created recently using @map to the hardware * @iotlb_sync: Flush all queued ranges from the hardware TLBs and empty flush @@ -231,6 +232,9 @@ struct iommu_ops { phys_addr_t paddr, size_t size, int prot, gfp_t gfp); size_t (*unmap)(struct iommu_domain *domain, unsigned long iova, size_t size, struct iommu_iotlb_gather *iotlb_gather); + size_t (*unmap_pages)(struct iommu_domain *domain, unsigned long iova, + size_t pgsize, size_t pgcount, + struct iommu_iotlb_gather *iotlb_gather); void (*flush_iotlb_all)(struct iommu_domain *domain); void (*iotlb_sync_map)(struct iommu_domain *domain, unsigned long iova, size_t size);
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