[PATCH v14 5/9] powerpc/eeh: EEH device for VF

[Gavin Shan]

From: Wei Yang <weiyang at linux.vnet.ibm.com>

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

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   | 15 +++++++++++++++
 2 files changed, 16 insertions(+)

diff --git a/arch/powerpc/include/asm/eeh.h b/arch/powerpc/include/asm/eeh.h
index 867c39b..574ed49a 100644
--- a/arch/powerpc/include/asm/eeh.h
+++ b/arch/powerpc/include/asm/eeh.h
@@ -141,6 +141,7 @@ 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 SRIOV PF		*/
 	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 b3b4df9..e23bdf7 100644
--- a/arch/powerpc/kernel/pci_dn.c
+++ b/arch/powerpc/kernel/pci_dn.c
@@ -179,6 +179,7 @@ struct pci_dn *add_dev_pci_data(struct pci_dev *pdev)
 {
 #ifdef CONFIG_PCI_IOV
 	struct pci_dn *parent, *pdn;
+	struct eeh_dev *edev;
 	int i;
 
 	/* Only support IOV for now */
@@ -204,6 +205,12 @@ struct pci_dn *add_dev_pci_data(struct pci_dev *pdev)
 				 __func__, i);
 			return NULL;
 		}
+
+		/* Create the EEH device for the VF */
+		eeh_dev_init(pdn, pci_bus_to_host(pdev->bus));
+		edev = pdn_to_eeh_dev(pdn);
+		BUG_ON(!edev);
+		edev->physfn = pdev;
 	}
 #endif /* CONFIG_PCI_IOV */
 
@@ -215,6 +222,7 @@ void remove_dev_pci_data(struct pci_dev *pdev)
 #ifdef CONFIG_PCI_IOV
 	struct pci_dn *parent;
 	struct pci_dn *pdn, *tmp;
+	struct eeh_dev *edev;
 	int i;
 
 	/*
@@ -256,6 +264,13 @@ void remove_dev_pci_data(struct pci_dev *pdev)
 			    pdn->devfn != pci_iov_virtfn_devfn(pdev, i))
 				continue;
 
+			/* Release EEH device for the VF */
+			edev = pdn_to_eeh_dev(pdn);
+			if (edev) {
+				pdn->edev = NULL;
+				kfree(edev);
+			}
+
 			if (!list_empty(&pdn->list))
 				list_del(&pdn->list);
 
-- 
2.1.0