[PATCH V12 6/9] powerpc/eeh: Create PE for VFs

[Wei Yang]

The patch creates PEs for VFs in the weak function
pcibios_bus_add_device(). Those PEs for VFs are identified with newly
introduced flag EEH_PE_VF so that we handle them differently during EEH
recovery.

Signed-off-by: Wei Yang <weiyang at linux.vnet.ibm.com>
---
 arch/powerpc/include/asm/eeh.h               |  1 +
 arch/powerpc/kernel/eeh_pe.c                 | 10 ++++++++--
 arch/powerpc/platforms/powernv/eeh-powernv.c | 16 ++++++++++++++++
 3 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/include/asm/eeh.h b/arch/powerpc/include/asm/eeh.h
index 6c383ad..ec21f8f 100644
--- a/arch/powerpc/include/asm/eeh.h
+++ b/arch/powerpc/include/asm/eeh.h
@@ -72,6 +72,7 @@ struct pci_dn;
 #define EEH_PE_PHB	(1 << 1)	/* PHB PE    */
 #define EEH_PE_DEVICE 	(1 << 2)	/* Device PE */
 #define EEH_PE_BUS	(1 << 3)	/* Bus PE    */
+#define EEH_PE_VF	(1 << 4)	/* VF PE     */
 
 #define EEH_PE_ISOLATED		(1 << 0)	/* Isolated PE		*/
 #define EEH_PE_RECOVERING	(1 << 1)	/* Recovering PE	*/
diff --git a/arch/powerpc/kernel/eeh_pe.c b/arch/powerpc/kernel/eeh_pe.c
index 8654cb1..29240ad 100644
--- a/arch/powerpc/kernel/eeh_pe.c
+++ b/arch/powerpc/kernel/eeh_pe.c
@@ -299,7 +299,10 @@ static struct eeh_pe *eeh_pe_get_parent(struct eeh_dev *edev)
 	 * EEH device already having associated PE, but
 	 * the direct parent EEH device doesn't have yet.
 	 */
-	pdn = pdn ? pdn->parent : NULL;
+	if (edev->physfn)
+		pdn = pci_get_pdn(edev->physfn);
+	else
+		pdn = pdn ? pdn->parent : NULL;
 	while (pdn) {
 		/* We're poking out of PCI territory */
 		parent = pdn_to_eeh_dev(pdn);
@@ -382,7 +385,10 @@ int eeh_add_to_parent_pe(struct eeh_dev *edev)
 	}
 
 	/* Create a new EEH PE */
-	pe = eeh_pe_alloc(edev->phb, EEH_PE_DEVICE);
+	if (edev->physfn)
+		pe = eeh_pe_alloc(edev->phb, EEH_PE_VF);
+	else
+		pe = eeh_pe_alloc(edev->phb, EEH_PE_DEVICE);
 	if (!pe) {
 		pr_err("%s: out of memory!\n", __func__);
 		return -ENOMEM;
diff --git a/arch/powerpc/platforms/powernv/eeh-powernv.c b/arch/powerpc/platforms/powernv/eeh-powernv.c
index 3bb6acb..131c7d0 100644
--- a/arch/powerpc/platforms/powernv/eeh-powernv.c
+++ b/arch/powerpc/platforms/powernv/eeh-powernv.c
@@ -1532,6 +1532,22 @@ static struct eeh_ops pnv_eeh_ops = {
 	.restore_config		= pnv_eeh_restore_config
 };
 
+void pcibios_bus_add_device(struct pci_dev *pdev)
+{
+	struct pci_dn *pdn = pci_get_pdn(pdev);
+
+	if (!pdev->is_virtfn)
+		return;
+
+	/*
+	 * The following operations will fail if VF's sysfs files
+	 * aren't created or its resources aren't finalized.
+	 */
+	eeh_add_device_early(pdn);
+	eeh_add_device_late(pdev);
+	eeh_sysfs_add_device(pdev);
+}
+
 /**
  * eeh_powernv_init - Register platform dependent EEH operations
  *
-- 
2.5.0