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| author | Wei Yang <weiyang@linux.vnet.ibm.com> | 2016-03-04 00:53:11 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2016-03-08 23:58:23 +0100 |
| commit | 67086e32b56481531ab1292b284e074b1a8d764c (patch) | |
| tree | 67012baf5d2b62c7cc1d0f05600bee2c30f29c9b /arch/powerpc/kernel/pci_dn.c | |
| parent | powerpc/powernv: Support PCI config restore for VFs (diff) | |
| download | linux-67086e32b56481531ab1292b284e074b1a8d764c.tar.xz linux-67086e32b56481531ab1292b284e074b1a8d764c.zip | |
powerpc/eeh: powerpc/eeh: Support error recovery for VF PE
PFs are enumerated on PCI bus, while VFs are created by PF's driver.
In EEH recovery, it has two cases:
1. Device and driver is EEH aware, error handlers are called.
2. Device and driver is not EEH aware, un-plug the device and plug it again
by enumerating it.
The special thing happens on the second case. For a PF, we could use the
original pci core to enumerate the bus, while for VF we need to record the
VFs which aer un-plugged then plug it again.
Also The patch caches the VF index in pci_dn, which can be used to
calculate VF's bus, device and function number. Those information helps to
locate the VF's PCI device instance when doing hotplug during EEH recovery
if necessary.
Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com>
Acked-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/pci_dn.c')
| -rw-r--r-- | arch/powerpc/kernel/pci_dn.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/pci_dn.c b/arch/powerpc/kernel/pci_dn.c index e23bdf786dab..38102cb9baa9 100644 --- a/arch/powerpc/kernel/pci_dn.c +++ b/arch/powerpc/kernel/pci_dn.c @@ -139,6 +139,7 @@ struct pci_dn *pci_get_pdn(struct pci_dev *pdev) #ifdef CONFIG_PCI_IOV static struct pci_dn *add_one_dev_pci_data(struct pci_dn *parent, struct pci_dev *pdev, + int vf_index, int busno, int devfn) { struct pci_dn *pdn; @@ -158,6 +159,7 @@ static struct pci_dn *add_one_dev_pci_data(struct pci_dn *parent, pdn->busno = busno; pdn->devfn = devfn; #ifdef CONFIG_PPC_POWERNV + pdn->vf_index = vf_index; pdn->pe_number = IODA_INVALID_PE; #endif INIT_LIST_HEAD(&pdn->child_list); @@ -197,7 +199,7 @@ struct pci_dn *add_dev_pci_data(struct pci_dev *pdev) return NULL; for (i = 0; i < pci_sriov_get_totalvfs(pdev); i++) { - pdn = add_one_dev_pci_data(parent, NULL, + pdn = add_one_dev_pci_data(parent, NULL, i, pci_iov_virtfn_bus(pdev, i), pci_iov_virtfn_devfn(pdev, i)); if (!pdn) { |