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s390/pci: adaptation of iommu to multifunction 

In the future the bus sysdata may not directly point to the
zpci_dev.

In preparation of upcoming patches let us abstract the
access to the zpci_dev from the device inside the pci device.

Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
Reviewed-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Pierre Morel 2020-02-21 17:20:46 +01:00 committed by Vasily Gorbik
parent e6ab7490ff
commit d08d6f5d75
2 changed files with 9 additions and 4 deletions
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5
arch/s390/include/asm/pci.h
View File

@ -231,6 +231,11 @@ static inline struct zpci_dev *to_zpci(struct pci_dev *pdev)
return pdev->sysdata;
}
static inline struct zpci_dev *to_zpci_dev(struct device *dev)
{
return to_zpci(to_pci_dev(dev));
}
struct zpci_dev *get_zdev_by_fid(u32);
/* DMA */

8
drivers/iommu/s390-iommu.c
View File

@ -87,7 +87,7 @@ static int s390_iommu_attach_device(struct iommu_domain *domain,
struct device *dev)
{
struct s390_domain *s390_domain = to_s390_domain(domain);
struct zpci_dev *zdev = to_pci_dev(dev)->sysdata;
struct zpci_dev *zdev = to_zpci_dev(dev);
struct s390_domain_device *domain_device;
unsigned long flags;
int rc;
@ -139,7 +139,7 @@ static void s390_iommu_detach_device(struct iommu_domain *domain,
struct device *dev)
{
struct s390_domain *s390_domain = to_s390_domain(domain);
struct zpci_dev *zdev = to_pci_dev(dev)->sysdata;
struct zpci_dev *zdev = to_zpci_dev(dev);
struct s390_domain_device *domain_device, *tmp;
unsigned long flags;
int found = 0;
@ -169,7 +169,7 @@ static void s390_iommu_detach_device(struct iommu_domain *domain,
static int s390_iommu_add_device(struct device *dev)
{
struct iommu_group *group = iommu_group_get_for_dev(dev);
struct zpci_dev *zdev = to_pci_dev(dev)->sysdata;
struct zpci_dev *zdev = to_zpci_dev(dev);
if (IS_ERR(group))
return PTR_ERR(group);
@ -182,7 +182,7 @@ static int s390_iommu_add_device(struct device *dev)
static void s390_iommu_remove_device(struct device *dev)
{
struct zpci_dev *zdev = to_pci_dev(dev)->sysdata;
struct zpci_dev *zdev = to_zpci_dev(dev);
struct iommu_domain *domain;
/*