During the EEH recovery, when a device's driver is not EEH aware or no
driver is bound with a device, EEH core would do hotplug on this device.
While it isn't feasible for a VF with usual hotplug procedure. During
removal of a VF, virtual bus should be removed if necessary. During the
re-creation, the pci_scan_slot() doesn't work on a VF.
This patch exports two functions to handle the hotplug case for VF
properly. They will be invoked when the EEH core does the hotplug case for
VFs.
Signed-off-by: Wei Yang <weiyang@xxxxxxxxxxxxxxxxxx>
---
drivers/pci/iov.c | 10 +++++-----
include/linux/pci.h | 2 ++
2 files changed, 7 insertions(+), 5 deletions(-)
diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index 47daf2f..f353e6f 100644
--- a/drivers/pci/iov.c
+++ b/drivers/pci/iov.c
@@ -106,7 +106,7 @@ 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_virtfn_add(struct pci_dev *dev, int id, int reset)
{
int i;
int rc = -ENOMEM;
@@ -181,7 +181,7 @@ failed:
return rc;
}
-static void virtfn_remove(struct pci_dev *dev, int id, int reset)
+void pci_iov_virtfn_remove(struct pci_dev *dev, int id, int reset)
{
struct pci_dev *virtfn;
@@ -302,7 +302,7 @@ 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_virtfn_add(dev, i, 0);
if (rc)
goto failed;
}
@@ -314,7 +314,7 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn)
failed:
for (j = 0; j < i; j++)
- virtfn_remove(dev, j, 0);
+ pci_iov_virtfn_remove(dev, j, 0);
iov->ctrl &= ~(PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE);
pci_cfg_access_lock(dev);
@@ -343,7 +343,7 @@ static void sriov_disable(struct pci_dev *dev)
return;
for (i = 0; i < iov->num_VFs; i++)
- virtfn_remove(dev, i, 0);
+ pci_iov_virtfn_remove(dev, i, 0);
pcibios_sriov_disable(dev);
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 353db8d..94bacfa 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1679,6 +1679,8 @@ 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_virtfn_add(struct pci_dev *dev, int id, int reset);
+void pci_iov_virtfn_remove(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);
--
1.7.9.5
--
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