github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-27 00:22:00 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

iommu/mtk_iommu: Add an IOMMU_IDENTITIY_DOMAIN

Browse Source 
This brings back the ops->detach_dev() code that commit
1b932ceddd ("iommu: Remove detach_dev callbacks") deleted and turns it
into an IDENTITY domain.

Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/18-v8-81230027b2fa+9d-iommu_all_defdom_jgg@nvidia.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Jason Gunthorpe 2023-09-13 10:43:51 -03:00 committed by Joerg Roedel
parent 666c9f1ef7
commit b01b125738
1 changed files with 23 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
drivers/iommu/mtk_iommu.c
View File

@ -777,6 +777,28 @@ static int mtk_iommu_attach_device(struct iommu_domain *domain,
return ret;
}
static int mtk_iommu_identity_attach(struct iommu_domain *identity_domain,
struct device *dev)
{
struct iommu_domain *domain = iommu_get_domain_for_dev(dev);
struct mtk_iommu_data *data = dev_iommu_priv_get(dev);
if (domain == identity_domain || !domain)
return 0;
mtk_iommu_config(data, dev, false, 0);
return 0;
}
static struct iommu_domain_ops mtk_iommu_identity_ops = {
.attach_dev = mtk_iommu_identity_attach,
};
static struct iommu_domain mtk_iommu_identity_domain = {
.type = IOMMU_DOMAIN_IDENTITY,
.ops = &mtk_iommu_identity_ops,
};
static int mtk_iommu_map(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)
@ -996,6 +1018,7 @@ static void mtk_iommu_get_resv_regions(struct device *dev,
}
static const struct iommu_ops mtk_iommu_ops = {
.identity_domain = &mtk_iommu_identity_domain,
.domain_alloc = mtk_iommu_domain_alloc,
.probe_device = mtk_iommu_probe_device,
.release_device = mtk_iommu_release_device,