/*
* This module supports the iSeries PCI bus interrupt handling
* Copyright (C) 20yy <Robert L Holtorf> <IBM Corp>
+ * Copyright (C) 2004-2005 IBM Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* Created, December 13, 2000 by Wayne Holm
* End Change Activity
*/
+#include <linux/config.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/threads.h>
#include <linux/string.h>
#include <linux/bootmem.h>
#include <linux/ide.h>
-
#include <linux/irq.h>
#include <linux/spinlock.h>
-#include <asm/ppcdebug.h>
+#include <asm/ppcdebug.h>
+#include <asm/iSeries/HvTypes.h>
+#include <asm/iSeries/HvLpEvent.h>
#include <asm/iSeries/HvCallPci.h>
#include <asm/iSeries/HvCallXm.h>
#include <asm/iSeries/iSeries_irq.h>
/* Note: the pcnet32 driver assumes irq numbers < 2 aren't valid. :( */
static int next_virtual_irq = 2;
+static long Pci_Interrupt_Count;
+static long Pci_Event_Count;
+
+enum XmPciLpEvent_Subtype {
+ XmPciLpEvent_BusCreated = 0, // PHB has been created
+ XmPciLpEvent_BusError = 1, // PHB has failed
+ XmPciLpEvent_BusFailed = 2, // Msg to Secondary, Primary failed bus
+ XmPciLpEvent_NodeFailed = 4, // Multi-adapter bridge has failed
+ XmPciLpEvent_NodeRecovered = 5, // Multi-adapter bridge has recovered
+ XmPciLpEvent_BusRecovered = 12, // PHB has been recovered
+ XmPciLpEvent_UnQuiesceBus = 18, // Secondary bus unqiescing
+ XmPciLpEvent_BridgeError = 21, // Bridge Error
+ XmPciLpEvent_SlotInterrupt = 22 // Slot interrupt
+};
+
+struct XmPciLpEvent_BusInterrupt {
+ HvBusNumber busNumber;
+ HvSubBusNumber subBusNumber;
+};
+
+struct XmPciLpEvent_NodeInterrupt {
+ HvBusNumber busNumber;
+ HvSubBusNumber subBusNumber;
+ HvAgentId deviceId;
+};
+
+struct XmPciLpEvent {
+ struct HvLpEvent hvLpEvent;
+
+ union {
+ u64 alignData; // Align on an 8-byte boundary
+
+ struct {
+ u32 fisr;
+ HvBusNumber busNumber;
+ HvSubBusNumber subBusNumber;
+ HvAgentId deviceId;
+ } slotInterrupt;
+
+ struct XmPciLpEvent_BusInterrupt busFailed;
+ struct XmPciLpEvent_BusInterrupt busRecovered;
+ struct XmPciLpEvent_BusInterrupt busCreated;
+
+ struct XmPciLpEvent_NodeInterrupt nodeFailed;
+ struct XmPciLpEvent_NodeInterrupt nodeRecovered;
+
+ } eventData;
+
+};
+
+static void intReceived(struct XmPciLpEvent *eventParm,
+ struct pt_regs *regsParm)
+{
+ int irq;
+
+ ++Pci_Interrupt_Count;
+#if 0
+ PPCDBG(PPCDBG_BUSWALK, "PCI: XmPciLpEvent.c: intReceived\n");
+#endif
+
+ switch (eventParm->hvLpEvent.xSubtype) {
+ case XmPciLpEvent_SlotInterrupt:
+ irq = eventParm->hvLpEvent.xCorrelationToken;
+ /* Dispatch the interrupt handlers for this irq */
+ ppc_irq_dispatch_handler(regsParm, irq);
+ HvCallPci_eoi(eventParm->eventData.slotInterrupt.busNumber,
+ eventParm->eventData.slotInterrupt.subBusNumber,
+ eventParm->eventData.slotInterrupt.deviceId);
+ break;
+ /* Ignore error recovery events for now */
+ case XmPciLpEvent_BusCreated:
+ printk(KERN_INFO "XmPciLpEvent.c: system bus %d created\n",
+ eventParm->eventData.busCreated.busNumber);
+ break;
+ case XmPciLpEvent_BusError:
+ case XmPciLpEvent_BusFailed:
+ printk(KERN_INFO "XmPciLpEvent.c: system bus %d failed\n",
+ eventParm->eventData.busFailed.busNumber);
+ break;
+ case XmPciLpEvent_BusRecovered:
+ case XmPciLpEvent_UnQuiesceBus:
+ printk(KERN_INFO "XmPciLpEvent.c: system bus %d recovered\n",
+ eventParm->eventData.busRecovered.busNumber);
+ break;
+ case XmPciLpEvent_NodeFailed:
+ case XmPciLpEvent_BridgeError:
+ printk(KERN_INFO
+ "XmPciLpEvent.c: multi-adapter bridge %d/%d/%d failed\n",
+ eventParm->eventData.nodeFailed.busNumber,
+ eventParm->eventData.nodeFailed.subBusNumber,
+ eventParm->eventData.nodeFailed.deviceId);
+ break;
+ case XmPciLpEvent_NodeRecovered:
+ printk(KERN_INFO
+ "XmPciLpEvent.c: multi-adapter bridge %d/%d/%d recovered\n",
+ eventParm->eventData.nodeRecovered.busNumber,
+ eventParm->eventData.nodeRecovered.subBusNumber,
+ eventParm->eventData.nodeRecovered.deviceId);
+ break;
+ default:
+ printk(KERN_ERR
+ "XmPciLpEvent.c: unrecognized event subtype 0x%x\n",
+ eventParm->hvLpEvent.xSubtype);
+ break;
+ }
+}
+
+static void XmPciLpEvent_handler(struct HvLpEvent *eventParm,
+ struct pt_regs *regsParm)
+{
+#ifdef CONFIG_PCI
+#if 0
+ PPCDBG(PPCDBG_BUSWALK, "XmPciLpEvent_handler, type 0x%x\n",
+ eventParm->xType);
+#endif
+ ++Pci_Event_Count;
+
+ if (eventParm && (eventParm->xType == HvLpEvent_Type_PciIo)) {
+ switch (eventParm->xFlags.xFunction) {
+ case HvLpEvent_Function_Int:
+ intReceived((struct XmPciLpEvent *)eventParm, regsParm);
+ break;
+ case HvLpEvent_Function_Ack:
+ printk(KERN_ERR
+ "XmPciLpEvent.c: unexpected ack received\n");
+ break;
+ default:
+ printk(KERN_ERR
+ "XmPciLpEvent.c: unexpected event function %d\n",
+ (int)eventParm->xFlags.xFunction);
+ break;
+ }
+ } else if (eventParm)
+ printk(KERN_ERR
+ "XmPciLpEvent.c: Unrecognized PCI event type 0x%x\n",
+ (int)eventParm->xType);
+ else
+ printk(KERN_ERR "XmPciLpEvent.c: NULL event received\n");
+#endif
+}
+
+/* This should be called sometime prior to buswalk (init_IRQ would be good) */
+int XmPciLpEvent_init()
+{
+ int xRc;
+
+ PPCDBG(PPCDBG_BUSWALK,
+ "XmPciLpEvent_init, Register Event type 0x%04X\n",
+ HvLpEvent_Type_PciIo);
+
+ xRc = HvLpEvent_registerHandler(HvLpEvent_Type_PciIo,
+ &XmPciLpEvent_handler);
+ if (xRc == 0) {
+ xRc = HvLpEvent_openPath(HvLpEvent_Type_PciIo, 0);
+ if (xRc != 0)
+ printk(KERN_ERR "XmPciLpEvent.c: open event path "
+ "failed with rc 0x%x\n", xRc);
+ } else
+ printk(KERN_ERR "XmPciLpEvent.c: register handler "
+ "failed with rc 0x%x\n", xRc);
+ return xRc;
+}
+
/* This is called by init_IRQ. set in ppc_md.init_IRQ by iSeries_setup.c */
void __init iSeries_init_IRQ(void)
{
Code Review / linux-2.6.git / blobdiff