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iommu/sun50i: Add an IOMMU_IDENTITIY_DOMAIN

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Prior to commit 1b932ceddd ("iommu: Remove detach_dev callbacks") the
sun50i_iommu_detach_device() function was being called by
ops->detach_dev().

This is an IDENTITY domain so convert sun50i_iommu_detach_device() into
sun50i_iommu_identity_attach() and a full IDENTITY domain and thus hook it
back up the same was as the old ops->detach_dev().

Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/19-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 10:43:52 -03:00 committed by Joerg Roedel
parent b01b125738
commit 5b167dea64
1 changed files with 19 additions and 7 deletions
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26
drivers/iommu/sun50i-iommu.c
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@ -757,21 +757,32 @@ static void sun50i_iommu_detach_domain(struct sun50i_iommu *iommu,
iommu->domain = NULL;
}
static void sun50i_iommu_detach_device(struct iommu_domain *domain,
struct device *dev)
static int sun50i_iommu_identity_attach(struct iommu_domain *identity_domain,
struct device *dev)
{
struct sun50i_iommu_domain *sun50i_domain = to_sun50i_domain(domain);
struct sun50i_iommu *iommu = dev_iommu_priv_get(dev);
struct sun50i_iommu_domain *sun50i_domain;
dev_dbg(dev, "Detaching from IOMMU domain\n");
if (iommu->domain != domain)
return;
if (iommu->domain == identity_domain)
return 0;
sun50i_domain = to_sun50i_domain(iommu->domain);
if (refcount_dec_and_test(&sun50i_domain->refcnt))
sun50i_iommu_detach_domain(iommu, sun50i_domain);
return 0;
}
static struct iommu_domain_ops sun50i_iommu_identity_ops = {
.attach_dev = sun50i_iommu_identity_attach,
};
static struct iommu_domain sun50i_iommu_identity_domain = {
.type = IOMMU_DOMAIN_IDENTITY,
.ops = &sun50i_iommu_identity_ops,
};
static int sun50i_iommu_attach_device(struct iommu_domain *domain,
struct device *dev)
{
@ -789,8 +800,7 @@ static int sun50i_iommu_attach_device(struct iommu_domain *domain,
if (iommu->domain == domain)
return 0;
if (iommu->domain)
sun50i_iommu_detach_device(iommu->domain, dev);
sun50i_iommu_identity_attach(&sun50i_iommu_identity_domain, dev);
sun50i_iommu_attach_domain(iommu, sun50i_domain);
@ -827,6 +837,7 @@ static int sun50i_iommu_of_xlate(struct device *dev,
}
static const struct iommu_ops sun50i_iommu_ops = {
.identity_domain = &sun50i_iommu_identity_domain,
.pgsize_bitmap = SZ_4K,
.device_group = sun50i_iommu_device_group,
.domain_alloc = sun50i_iommu_domain_alloc,
@ -985,6 +996,7 @@ static int sun50i_iommu_probe(struct platform_device *pdev)
if (!iommu)
return -ENOMEM;
spin_lock_init(&iommu->iommu_lock);
iommu->domain = &sun50i_iommu_identity_domain;
platform_set_drvdata(pdev, iommu);
iommu->dev = &pdev->dev;