From: Wei Yang <weiyang@linux.vnet.ibm.com>
To: Gavin Shan <gwshan@linux.vnet.ibm.com>
Cc: bhelgaas@google.com, linux-pci@vger.kernel.org,
Wei Yang <weiyang@linux.vnet.ibm.com>,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH V3 2/9] powerpc/pci_dn: cache vf_index in pci_dn
Date: Mon, 11 May 2015 13:54:12 +0800 [thread overview]
Message-ID: <20150511055412.GA1632@richard> (raw)
In-Reply-To: <20150511022104.GA7459@gwshan>
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 <weiyang@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
next prev parent reply other threads:[~2015-05-11 5:55 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-04 7:07 [PATCH V3 0/9] VF EEH on Power8 Wei Yang
2015-05-04 7:07 ` [PATCH V3 1/9] pci/iov: rename and export virtfn_add/virtfn_remove Wei Yang
2015-05-11 2:13 ` Gavin Shan
2015-05-04 7:07 ` [PATCH V3 2/9] powerpc/pci_dn: cache vf_index in pci_dn Wei Yang
2015-05-11 2:21 ` Gavin Shan
2015-05-11 5:54 ` Wei Yang [this message]
2015-05-12 6:15 ` Gavin Shan
2015-05-12 7:29 ` Wei Yang
2015-05-04 7:07 ` [PATCH V3 3/9] powerpc/pci: remove PCI devices in reverse order Wei Yang
2015-05-04 7:07 ` [PATCH V3 4/9] powerpc/eeh: cache address range just for normal device Wei Yang
2015-05-04 7:07 ` [PATCH V3 5/9] powerpc/eeh: create EEH_PE_VF for VF PE Wei Yang
2015-05-11 2:37 ` Gavin Shan
2015-05-11 6:25 ` Wei Yang
2015-05-12 6:28 ` Gavin Shan
2015-05-12 7:52 ` Wei Yang
2015-05-04 7:07 ` [PATCH V3 6/9] powerpc/powernv: create/release eeh_dev for VF Wei Yang
2015-05-11 2:48 ` Gavin Shan
2015-05-12 8:06 ` Wei Yang
2015-05-12 23:09 ` Gavin Shan
2015-05-04 7:07 ` [PATCH V3 7/9] powerpc/powernv: Support EEH reset for VFs Wei Yang
2015-05-11 3:03 ` Gavin Shan
2015-05-04 7:07 ` [PATCH V3 8/9] powerpc/powernv: Support PCI config restore " Wei Yang
2015-05-11 4:22 ` Gavin Shan
2015-05-12 1:31 ` Wei Yang
2015-05-12 6:34 ` Gavin Shan
2015-05-12 8:16 ` Wei Yang
2015-05-12 23:16 ` Gavin Shan
2015-05-04 7:07 ` [PATCH V3 9/9] powerpc/eeh: handle VF PE properly Wei Yang
2015-05-13 1:16 ` Gavin Shan
2015-05-14 9:35 ` Wei Yang
2015-05-14 12:15 ` Gavin Shan
2015-05-14 10:02 ` Wei Yang
2015-05-14 12:30 ` Gavin Shan
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