[PATCH V10 03/12] powerpc/pci: Cache VF index in pci_dn

[Wei Yang]

On Fri, Oct 30, 2015 at 01:05:43PM +1100, Alexey Kardashevskiy wrote:
>On 10/26/2015 02:15 PM, Wei Yang wrote:
>>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.
>
>
>The patch itself does not make much sense and quite small, I'd merge it into
>the one which makes use of this new vf_index.
>

Well, reasonable, will merge it.

>>
>>Signed-off-by: Wei Yang <weiyang at linux.vnet.ibm.com>
>>Acked-by: Gavin Shan <gwshan at linux.vnet.ibm.com>
>>---
>>  arch/powerpc/include/asm/pci-bridge.h | 1 +
>>  arch/powerpc/kernel/pci_dn.c          | 4 +++-
>>  2 files changed, 4 insertions(+), 1 deletion(-)
>>
>>diff --git a/arch/powerpc/include/asm/pci-bridge.h b/arch/powerpc/include/asm/pci-bridge.h
>>index b3a226b..3d7e537 100644
>>--- a/arch/powerpc/include/asm/pci-bridge.h
>>+++ b/arch/powerpc/include/asm/pci-bridge.h
>>@@ -210,6 +210,7 @@ struct pci_dn {
>>  #define IODA_INVALID_PE		(-1)
>>  #ifdef CONFIG_PPC_POWERNV
>>  	int	pe_number;
>>+	int     vf_index;		/* VF index in the PF */
>>  #ifdef CONFIG_PCI_IOV
>>  	u16     vfs_expanded;		/* number of VFs IOV BAR expanded */
>>  	u16     num_vfs;		/* number of VFs enabled*/
>>diff --git a/arch/powerpc/kernel/pci_dn.c b/arch/powerpc/kernel/pci_dn.c
>>index b3b4df9..f771130 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;
>>@@ -157,6 +158,7 @@ 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 +198,7 @@ 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) {
>>
>
>
>-- 
>Alexey
>--
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-- 
Richard Yang
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