shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-03-26 12:30:23 +09:00
Code Issues Packages Projects Releases Wiki Activity

BACKPORT: FROMLIST: iommu: Add a map_pages() op for IOMMU drivers

Browse Source 
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 map a physically contiguous
rnage of pages of the same size.

For IOMMU drivers that do not specify a map_pages() callback,
the existing logic of mapping memory one page block at a time
will be used.

Bug: 178537788
Change-Id: I907b346558dcc4127a9769c66940e324aaa48d3e
Link: https://lore.kernel.org/linux-iommu/20210408171402.12607-1-isaacm@codeaurora.org/T/#t
Signed-off-by: Isaac J. Manjarres <isaacm@codeaurora.org>
Suggested-by: Will Deacon <will@kernel.org>
Acked-by: Lu Baolu <baolu.lu@linux.intel.com>
This commit is contained in:
Isaac J. Manjarres
2021-04-01 14:09:26 -07:00
committed by Todd Kjos
parent ba575b2222
commit 16cabf65c7
1 changed files with 5 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
include/linux/iommu.h
View File

@@ -203,6 +203,8 @@ struct iommu_iotlb_gather {
* @attach_dev: attach device to an iommu domain
* @detach_dev: detach device from an iommu domain
* @map: map a physically contiguous memory region to an iommu domain
* @map_pages: map a physically contiguous set of pages of the same size to
* an iommu domain.
* @map_sg: map a scatter-gather list of physically contiguous chunks to
* an iommu domain.
* @unmap: unmap a physically contiguous memory region from an iommu domain
@@ -257,6 +259,9 @@ struct iommu_ops {
void (*detach_dev)(struct iommu_domain *domain, struct device *dev);
int (*map)(struct iommu_domain *domain, unsigned long iova,
phys_addr_t paddr, size_t size, int prot, gfp_t gfp);
int (*map_pages)(struct iommu_domain *domain, unsigned long iova,
phys_addr_t paddr, size_t pgsize, size_t pgcount,
int prot, gfp_t gfp, size_t *mapped);
int (*map_sg)(struct iommu_domain *domain, unsigned long iova,
struct scatterlist *sg, unsigned int nents, int prot,
gfp_t gfp, size_t *mapped);