diff options
| author | Isaac J. Manjarres <isaacm@codeaurora.org> | 2021-06-16 06:38:43 -0700 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2021-07-26 12:37:07 +0200 |
| commit | cacffb7f7b45ba7649eedea4c196c6e9f1863bf3 (patch) | |
| tree | 63e97e905a210aeb4dacfcd79b301c99ce4785ef /include | |
| parent | 374c15594c4ee0dfcceb38852bd43be09070f402 (diff) | |
iommu: Add an unmap_pages() op for IOMMU drivers
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>
Link: https://lore.kernel.org/r/1623850736-389584-3-git-send-email-quic_c_gdjako@quicinc.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/iommu.h | 4 |
1 files changed, 4 insertions, 0 deletions
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); |