[PATCH v6 1/3] powerpc/eeh: Flags for passed device and PE

[Gavin Shan]

The patch introduces new flags for EEH device and PE to indicate
that the device or PE has been passed through to somebody else.
In turn, we will deliver EEH errors to the device's owner for
further handling, which will be done in subsequent patches.

Signed-off-by: Gavin Shan <gwshan at linux.vnet.ibm.com>
---
 arch/powerpc/include/asm/eeh.h | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/arch/powerpc/include/asm/eeh.h b/arch/powerpc/include/asm/eeh.h
index 7782056..34a2d83 100644
--- a/arch/powerpc/include/asm/eeh.h
+++ b/arch/powerpc/include/asm/eeh.h
@@ -72,6 +72,7 @@ struct device_node;
 #define EEH_PE_RESET		(1 << 2)	/* PE reset in progress	*/
 
 #define EEH_PE_KEEP		(1 << 8)	/* Keep PE on hotplug	*/
+#define EEH_PE_PASSTHROUGH	(1 << 9)	/* PE owned by guest	*/
 
 struct eeh_pe {
 	int type;			/* PE type: PHB/Bus/Device	*/
@@ -93,6 +94,21 @@ struct eeh_pe {
 #define eeh_pe_for_each_dev(pe, edev, tmp) \
 		list_for_each_entry_safe(edev, tmp, &pe->edevs, list)
 
+static inline bool eeh_pe_passed(struct eeh_pe *pe)
+{
+	return pe ? !!(pe->state & EEH_PE_PASSTHROUGH) : false;
+}
+
+static inline void eeh_pe_set_passed(struct eeh_pe *pe, bool passed)
+{
+	if (pe) {
+		if (passed)
+			pe->state |= EEH_PE_PASSTHROUGH;
+		else
+			pe->state &= ~EEH_PE_PASSTHROUGH;
+	}
+}
+
 /*
  * The struct is used to trace EEH state for the associated
  * PCI device node or PCI device. In future, it might
@@ -110,6 +126,7 @@ struct eeh_pe {
 #define EEH_DEV_SYSFS		(1 << 9)	/* Sysfs created	*/
 #define EEH_DEV_REMOVED		(1 << 10)	/* Removed permanently	*/
 #define EEH_DEV_FRESET		(1 << 11)	/* Fundamental reset	*/
+#define EEH_DEV_PASSTHROUGH	(1 << 12)	/* Owned by guest	*/
 
 struct eeh_dev {
 	int mode;			/* EEH mode			*/
@@ -138,6 +155,21 @@ static inline struct pci_dev *eeh_dev_to_pci_dev(struct eeh_dev *edev)
 	return edev ? edev->pdev : NULL;
 }
 
+static inline bool eeh_dev_passed(struct eeh_dev *dev)
+{
+	return dev ? !!(dev->mode & EEH_DEV_PASSTHROUGH) : false;
+}
+
+static inline void eeh_dev_set_passed(struct eeh_dev *dev, bool passed)
+{
+	if (dev) {
+		if (passed)
+			dev->mode |= EEH_DEV_PASSTHROUGH;
+		else
+			dev->mode &= ~EEH_DEV_PASSTHROUGH;
+	}
+}
+
 /* Return values from eeh_ops::next_error */
 enum {
 	EEH_NEXT_ERR_NONE = 0,
-- 
1.8.3.2