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iommu/amd: Update struct iommu_dev_data definition

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struct iommu_dev_data contains member "pdev" to point to pci_dev. This is
valid for only PCI devices and for other devices this will be NULL. This
causes unnecessary "pdev != NULL" check at various places.

Replace "struct pci_dev" member with "struct device" and use to_pci_dev()
to get pci device reference as needed. Also adjust setup_aliases() and
clone_aliases() function.

No functional change intended.

Co-developed-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Link: https://lore.kernel.org/r/20220706113825.25582-2-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Vasant Hegde 2022-07-06 17:07:51 +05:30 committed by Joerg Roedel
parent 83874d51eb
commit d02674d71c
2 changed files with 20 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/iommu/amd/amd_iommu_types.h
View File

@ -689,7 +689,7 @@ struct iommu_dev_data {
struct list_head list; /* For domain->dev_list */
struct llist_node dev_data_list; /* For global dev_data_list */
struct protection_domain *domain; /* Domain the device is bound to */
struct pci_dev *pdev;
struct device *dev;
u16 devid; /* PCI Device ID */
bool iommu_v2; /* Device can make use of IOMMUv2 */
struct {

32
drivers/iommu/amd/iommu.c
View File

@ -188,10 +188,13 @@ static int clone_alias(struct pci_dev *pdev, u16 alias, void *data)
return 0;
}
static void clone_aliases(struct pci_dev *pdev)
static void clone_aliases(struct device *dev)
{
if (!pdev)
struct pci_dev *pdev;
if (!dev_is_pci(dev))
return;
pdev = to_pci_dev(dev);
/*
* The IVRS alias stored in the alias table may not be
@ -203,14 +206,14 @@ static void clone_aliases(struct pci_dev *pdev)
pci_for_each_dma_alias(pdev, clone_alias, NULL);
}
static struct pci_dev *setup_aliases(struct device *dev)
static void setup_aliases(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
u16 ivrs_alias;
/* For ACPI HID devices, there are no aliases */
if (!dev_is_pci(dev))
return NULL;
return;
/*
* Add the IVRS alias to the pci aliases if it is on the same
@ -221,9 +224,7 @@ static struct pci_dev *setup_aliases(struct device *dev)
PCI_BUS_NUM(ivrs_alias) == pdev->bus->number)
pci_add_dma_alias(pdev, ivrs_alias & 0xff, 1);
clone_aliases(pdev);
return pdev;
clone_aliases(dev);
}
static struct iommu_dev_data *find_dev_data(u16 devid)
@ -331,7 +332,8 @@ static int iommu_init_device(struct device *dev)
if (!dev_data)
return -ENOMEM;
dev_data->pdev = setup_aliases(dev);
dev_data->dev = dev;
setup_aliases(dev);
/*
* By default we use passthrough mode for IOMMUv2 capable device.
@ -1232,13 +1234,17 @@ static int device_flush_dte_alias(struct pci_dev *pdev, u16 alias, void *data)
static int device_flush_dte(struct iommu_dev_data *dev_data)
{
struct amd_iommu *iommu;
struct pci_dev *pdev = NULL;
u16 alias;
int ret;
iommu = amd_iommu_rlookup_table[dev_data->devid];
if (dev_data->pdev)
ret = pci_for_each_dma_alias(dev_data->pdev,
if (dev_is_pci(dev_data->dev))
pdev = to_pci_dev(dev_data->dev);
if (pdev)
ret = pci_for_each_dma_alias(pdev,
device_flush_dte_alias, iommu);
else
ret = iommu_flush_dte(iommu, dev_data->devid);
@ -1561,7 +1567,7 @@ static void do_attach(struct iommu_dev_data *dev_data,
/* Update device table */
set_dte_entry(dev_data->devid, domain,
ats, dev_data->iommu_v2);
clone_aliases(dev_data->pdev);
clone_aliases(dev_data->dev);
device_flush_dte(dev_data);
}
@ -1577,7 +1583,7 @@ static void do_detach(struct iommu_dev_data *dev_data)
dev_data->domain = NULL;
list_del(&dev_data->list);
clear_dte_entry(dev_data->devid);
clone_aliases(dev_data->pdev);
clone_aliases(dev_data->dev);
/* Flush the DTE entry */
device_flush_dte(dev_data);
@ -1818,7 +1824,7 @@ static void update_device_table(struct protection_domain *domain)
list_for_each_entry(dev_data, &domain->dev_list, list) {
set_dte_entry(dev_data->devid, domain,
dev_data->ats.enabled, dev_data->iommu_v2);
clone_aliases(dev_data->pdev);
clone_aliases(dev_data->dev);
}
}