On Mon, May 11, 2015 at 12:21:04PM +1000, Gavin Shan wrote:
>On Mon, May 04, 2015 at 03:07:31PM +0800, Wei Yang wrote:
>>This patch caches the index of a VF in its PF in pci_dn.
>>
>
>At least you can mention the purpose of vf_index to make the commit log
>complete. The following message looks better?
>
>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.
>
Thanks, looks better. I added it in the log.
>>Signed-off-by: Wei Yang <weiy...@linux.vnet.ibm.com>
>>---
>> arch/powerpc/include/asm/pci-bridge.h | 1 +
>> arch/powerpc/kernel/pci_dn.c | 5 +++--
>> 2 files changed, 4 insertions(+), 2 deletions(-)
>>
>>diff --git a/arch/powerpc/include/asm/pci-bridge.h
>>b/arch/powerpc/include/asm/pci-bridge.h
>>index 1811c44..9582aa2 100644
>>--- a/arch/powerpc/include/asm/pci-bridge.h
>>+++ b/arch/powerpc/include/asm/pci-bridge.h
>>@@ -199,6 +199,7 @@ struct pci_dn {
>> #ifdef CONFIG_PCI_IOV
>> u16 vfs_expanded; /* number of VFs IOV BAR expanded */
>> u16 num_vfs; /* number of VFs enabled*/
>>+ int vf_index; /* Index to PF for VF dev */
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^
>
> /* VF index in the PF */
Ok, changed in the code.
>
>And I believe it can be "unsigned int", or u16. We should have
>non-negative vf_index, no?
Take a look in the virtfn_add(), the index in drivers/pci/iov.c is int. So I
copy that.
>
>> int offset; /* PE# for the first VF PE */
>> #define M64_PER_IOV 4
>> int m64_per_iov;
>>diff --git a/arch/powerpc/kernel/pci_dn.c b/arch/powerpc/kernel/pci_dn.c
>>index b3b4df9..bf0fb873 100644
>>--- a/arch/powerpc/kernel/pci_dn.c
>>+++ b/arch/powerpc/kernel/pci_dn.c
>>@@ -138,7 +138,7 @@ 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,
>>+ struct pci_dev *pdev, int vf_index,
>
> struct pci_dev *pdev,
> int vf_index;
Some reason for this comment?
That does not exceed 80 characters.
>
>> int busno, int devfn)
>> {
>> struct pci_dn *pdn;
>>@@ -157,6 +157,7 @@ static struct pci_dn *add_one_dev_pci_data(struct pci_dn
>>*parent,
>> pdn->parent = parent;
>> pdn->busno = busno;
>> pdn->devfn = devfn;
>>+ pdn->vf_index = vf_index;
>> #ifdef CONFIG_PPC_POWERNV
>> pdn->pe_number = IODA_INVALID_PE;
>> #endif
>>@@ -196,7 +197,7 @@ 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) {
>
>Thanks,
>Gavin
--
Richard Yang
Help you, Help me
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