On Fri, Oct 30, 2015 at 02:46:35PM +1100, Alexey Kardashevskiy wrote:
>On 10/26/2015 02:15 PM, Wei Yang wrote:
>>Current EEH recovery code works with the assumption: the PE has primary
>>bus. Unfortunately, that's not true for VF PEs, which generally contains
>>one or multiple VFs (for VF group case).
>
>What is that "VF group case"? Is not it a "compound PE" thingy which you were
>removing in "SRIOV redesign patchset"?
>
I think you are right.
The commit log is not correct, especially after SRIOV redesign.
Will remove this part.
>The patch might be ok but the commit log above does not explain why the
>existing way of PEs allocation would not work - somehow it works for a
>primary bus now, why would not it work on other buses?
>
>
>>The patch creates PEs for VFs in the weak function
>>pcibios_bus_add_device().Those PEs for VFs are identified with newly
>>introduced flag EEH_PE_VF so that we handle them differently during EEH
>>recovery.
>>
>>[gwshan: changelog and code refactoring]
>>Signed-off-by: Wei Yang <weiyang@xxxxxxxxxxxxxxxxxx>
>>Acked-by: Gavin Shan <gwshan@xxxxxxxxxxxxxxxxxx>
>>---
>> arch/powerpc/include/asm/eeh.h | 1 +
>> arch/powerpc/kernel/eeh_pe.c | 10 ++++++++--
>> arch/powerpc/platforms/powernv/eeh-powernv.c | 16 ++++++++++++++++
>> 3 files changed, 25 insertions(+), 2 deletions(-)
>>
>>diff --git a/arch/powerpc/include/asm/eeh.h b/arch/powerpc/include/asm/eeh.h
>>index 6c383ad..ec21f8f 100644
>>--- a/arch/powerpc/include/asm/eeh.h
>>+++ b/arch/powerpc/include/asm/eeh.h
>>@@ -72,6 +72,7 @@ struct pci_dn;
>> #define EEH_PE_PHB (1 << 1) /* PHB PE */
>> #define EEH_PE_DEVICE (1 << 2) /* Device PE */
>> #define EEH_PE_BUS (1 << 3) /* Bus PE */
>>+#define EEH_PE_VF (1 << 4) /* VF PE */
>>
>> #define EEH_PE_ISOLATED (1 << 0) /* Isolated PE */
>> #define EEH_PE_RECOVERING (1 << 1) /* Recovering PE */
>>diff --git a/arch/powerpc/kernel/eeh_pe.c b/arch/powerpc/kernel/eeh_pe.c
>>index 35f0b62..260a701 100644
>>--- a/arch/powerpc/kernel/eeh_pe.c
>>+++ b/arch/powerpc/kernel/eeh_pe.c
>>@@ -299,7 +299,10 @@ static struct eeh_pe *eeh_pe_get_parent(struct eeh_dev *edev)
>> * EEH device already having associated PE, but
>> * the direct parent EEH device doesn't have yet.
>> */
>>- pdn = pdn ? pdn->parent : NULL;
>>+ if (edev->physfn)
>>+ pdn = pci_get_pdn(edev->physfn);
>>+ else
>>+ pdn = pdn ? pdn->parent : NULL;
>> while (pdn) {
>> /* We're poking out of PCI territory */
>> parent = pdn_to_eeh_dev(pdn);
>>@@ -382,7 +385,10 @@ int eeh_add_to_parent_pe(struct eeh_dev *edev)
>> }
>>
>> /* Create a new EEH PE */
>>- pe = eeh_pe_alloc(edev->phb, EEH_PE_DEVICE);
>>+ if (edev->physfn)
>>+ pe = eeh_pe_alloc(edev->phb, EEH_PE_VF);
>>+ else
>>+ pe = eeh_pe_alloc(edev->phb, EEH_PE_DEVICE);
>> if (!pe) {
>> pr_err("%s: out of memory!\n", __func__);
>> return -ENOMEM;
>>diff --git a/arch/powerpc/platforms/powernv/eeh-powernv.c b/arch/powerpc/platforms/powernv/eeh-powernv.c
>>index 7cf0df8..cfd55dd 100644
>>--- a/arch/powerpc/platforms/powernv/eeh-powernv.c
>>+++ b/arch/powerpc/platforms/powernv/eeh-powernv.c
>>@@ -1524,6 +1524,22 @@ static struct eeh_ops pnv_eeh_ops = {
>> .restore_config = pnv_eeh_restore_config
>> };
>>
>>+void pcibios_bus_add_device(struct pci_dev *pdev)
>>+{
>>+ struct pci_dn *pdn = pci_get_pdn(pdev);
>>+
>>+ if (!pdev->is_virtfn)
>>+ return;
>>+
>>+ /*
>>+ * The following operations will fail if VF's sysfs files
>>+ * aren't created or its resources aren't finalized.
>>+ */
>>+ eeh_add_device_early(pdn);
>>+ eeh_add_device_late(pdev);
>>+ eeh_sysfs_add_device(pdev);
>>+}
>>+
>> /**
>> * eeh_powernv_init - Register platform dependent EEH operations
>> *
>>
>
>
>--
>Alexey
--
Richard Yang
Help you, Help me
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