[PATCH V6 05/10] powerpc/powernv: EEH device for VF

[Wei Yang]

VFs and their corresponding pci_dn instances are created and released
dynamically as their PF's SRIOV capability is enabled and disabled.
The patch creates and releases EEH devices for VFs when creating and
releasing their pci_dn instances, which means EEH devices and pci_dn
instances have same life cycle. Also, VF's EEH device is identified
by (struct eeh_dev::physfn).

[gwshan: changelog and removed CONFIG_PCI_IOV]
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/eeh.h |    1 +
 arch/powerpc/kernel/pci_dn.c   |   12 ++++++++++++
 2 files changed, 13 insertions(+)

diff --git a/arch/powerpc/include/asm/eeh.h b/arch/powerpc/include/asm/eeh.h
index a52db28..1b3614d 100644
--- a/arch/powerpc/include/asm/eeh.h
+++ b/arch/powerpc/include/asm/eeh.h
@@ -138,6 +138,7 @@ struct eeh_dev {
 	struct pci_controller *phb;	/* Associated PHB		*/
 	struct pci_dn *pdn;		/* Associated PCI device node	*/
 	struct pci_dev *pdev;		/* Associated PCI device	*/
+	struct pci_dev *physfn;		/* Associated PF PORT		*/
 	struct pci_bus *bus;		/* PCI bus for partial hotplug	*/
 };
 
diff --git a/arch/powerpc/kernel/pci_dn.c b/arch/powerpc/kernel/pci_dn.c
index f771130..f0ddde7 100644
--- a/arch/powerpc/kernel/pci_dn.c
+++ b/arch/powerpc/kernel/pci_dn.c
@@ -180,7 +180,9 @@ static struct pci_dn *add_one_dev_pci_data(struct pci_dn *parent,
 struct pci_dn *add_dev_pci_data(struct pci_dev *pdev)
 {
 #ifdef CONFIG_PCI_IOV
+	struct pci_controller *hose = pci_bus_to_host(pdev->bus);
 	struct pci_dn *parent, *pdn;
+	struct eeh_dev *edev;
 	int i;
 
 	/* Only support IOV for now */
@@ -206,6 +208,9 @@ struct pci_dn *add_dev_pci_data(struct pci_dev *pdev)
 				 __func__, i);
 			return NULL;
 		}
+		eeh_dev_init(pdn, hose);
+		edev = pdn_to_eeh_dev(pdn);
+		edev->physfn = pdev;
 	}
 #endif /* CONFIG_PCI_IOV */
 
@@ -254,10 +259,17 @@ void remove_dev_pci_data(struct pci_dev *pdev)
 	for (i = 0; i < pci_sriov_get_totalvfs(pdev); i++) {
 		list_for_each_entry_safe(pdn, tmp,
 			&parent->child_list, list) {
+			struct eeh_dev *edev;
 			if (pdn->busno != pci_iov_virtfn_bus(pdev, i) ||
 			    pdn->devfn != pci_iov_virtfn_devfn(pdev, i))
 				continue;
 
+			edev = pdn_to_eeh_dev(pdn);
+			if (edev) {
+				pdn->edev = NULL;
+				kfree(edev);
+			}
+
 			if (!list_empty(&pdn->list))
 				list_del(&pdn->list);
 
-- 
1.7.9.5