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iommu/amd: Introduce per device DTE update function

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Consolidate per device update and flush logic into separate function.
Also make it as global function as it will be used in subsequent series
to update the DTE.

Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20240418103400.6229-3-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Vasant Hegde 2024-04-18 10:33:47 +00:00 committed by Joerg Roedel
parent 9433d5b2ac
commit c5ebd09625
2 changed files with 19 additions and 8 deletions
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1
drivers/iommu/amd/amd_iommu.h
View File

@ -56,6 +56,7 @@ int amd_iommu_clear_gcr3(struct iommu_dev_data *dev_data, ioasid_t pasid);
void amd_iommu_flush_all_caches(struct amd_iommu *iommu);
void amd_iommu_update_and_flush_device_table(struct protection_domain *domain);
void amd_iommu_domain_update(struct protection_domain *domain);
void amd_iommu_dev_update_dte(struct iommu_dev_data *dev_data, bool set);
void amd_iommu_domain_flush_complete(struct protection_domain *domain);
void amd_iommu_domain_flush_pages(struct protection_domain *domain,
u64 address, size_t size);

26
drivers/iommu/amd/iommu.c
View File

@ -2002,6 +2002,21 @@ static void clear_dte_entry(struct amd_iommu *iommu, u16 devid)
amd_iommu_apply_erratum_63(iommu, devid);
}
/* Update and flush DTE for the given device */
void amd_iommu_dev_update_dte(struct iommu_dev_data *dev_data, bool set)
{
struct amd_iommu *iommu = get_amd_iommu_from_dev(dev_data->dev);
if (set)
set_dte_entry(iommu, dev_data);
else
clear_dte_entry(iommu, dev_data->devid);
clone_aliases(iommu, dev_data->dev);
device_flush_dte(dev_data);
iommu_completion_wait(iommu);
}
static int do_attach(struct iommu_dev_data *dev_data,
struct protection_domain *domain)
{
@ -2036,10 +2051,7 @@ static int do_attach(struct iommu_dev_data *dev_data,
}
/* Update device table */
set_dte_entry(iommu, dev_data);
clone_aliases(iommu, dev_data->dev);
device_flush_dte(dev_data);
amd_iommu_dev_update_dte(dev_data, true);
return ret;
}
@ -2058,11 +2070,9 @@ static void do_detach(struct iommu_dev_data *dev_data)
/* Update data structures */
dev_data->domain = NULL;
list_del(&dev_data->list);
clear_dte_entry(iommu, dev_data->devid);
clone_aliases(iommu, dev_data->dev);
/* Flush the DTE entry */
device_flush_dte(dev_data);
/* Clear DTE and flush the entry */
amd_iommu_dev_update_dte(dev_data, false);
/* Flush IOTLB and wait for the flushes to finish */
amd_iommu_domain_flush_all(domain);