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PCI/IOV: Rename and export virtfn_{add, remove} 

During EEH recovery, hotplug is applied to the devices which don't
have drivers or their drivers don't support EEH. However, the hotplug,
which was implemented based on PCI bus, can't be applied to VF directly.
Instead, we unplug and plug individual PCI devices (VFs).

This renames virtn_{add,remove}() and exports them so they can be used
in PCI hotplug during EEH recovery.

Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com>
Reviewed-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Wei Yang 2016-03-04 10:53:03 +11:00 committed by Michael Ellerman
parent 4eb0799ff9
commit c194f7ea7f
2 changed files with 13 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/pci/iov.c
View File

@ -113,7 +113,7 @@ resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno)
return dev->sriov->barsz[resno - PCI_IOV_RESOURCES];
}
static int virtfn_add(struct pci_dev *dev, int id, int reset)
int pci_iov_add_virtfn(struct pci_dev *dev, int id, int reset)
{
int i;
int rc = -ENOMEM;
@ -188,7 +188,7 @@ failed:
return rc;
}
static void virtfn_remove(struct pci_dev *dev, int id, int reset)
void pci_iov_remove_virtfn(struct pci_dev *dev, int id, int reset)
{
char buf[VIRTFN_ID_LEN];
struct pci_dev *virtfn;
@ -321,7 +321,7 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn)
}
for (i = 0; i < initial; i++) {
rc = virtfn_add(dev, i, 0);
rc = pci_iov_add_virtfn(dev, i, 0);
if (rc)
goto failed;
}
@ -333,7 +333,7 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn)
failed:
while (i--)
virtfn_remove(dev, i, 0);
pci_iov_remove_virtfn(dev, i, 0);
pcibios_sriov_disable(dev);
err_pcibios:
@ -359,7 +359,7 @@ static void sriov_disable(struct pci_dev *dev)
return;
for (i = 0; i < iov->num_VFs; i++)
virtfn_remove(dev, i, 0);
pci_iov_remove_virtfn(dev, i, 0);
pcibios_sriov_disable(dev);

8
include/linux/pci.h
View File

@ -1738,6 +1738,8 @@ int pci_iov_virtfn_devfn(struct pci_dev *dev, int id);
int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
void pci_disable_sriov(struct pci_dev *dev);
int pci_iov_add_virtfn(struct pci_dev *dev, int id, int reset);
void pci_iov_remove_virtfn(struct pci_dev *dev, int id, int reset);
int pci_num_vf(struct pci_dev *dev);
int pci_vfs_assigned(struct pci_dev *dev);
int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs);
@ -1754,6 +1756,12 @@ static inline int pci_iov_virtfn_devfn(struct pci_dev *dev, int id)
}
static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
{ return -ENODEV; }
static inline int pci_iov_add_virtfn(struct pci_dev *dev, int id, int reset)
{
return -ENOSYS;
}
static inline void pci_iov_remove_virtfn(struct pci_dev *dev,
int id, int reset) { }
static inline void pci_disable_sriov(struct pci_dev *dev) { }
static inline int pci_num_vf(struct pci_dev *dev) { return 0; }
static inline int pci_vfs_assigned(struct pci_dev *dev)