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@@ -1,6 +1,7 @@
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/*
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* This module supports the iSeries PCI bus interrupt handling
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* Copyright (C) 20yy <Robert L Holtorf> <IBM Corp>
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+ * Copyright (C) 2004-2005 IBM Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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@@ -22,6 +23,7 @@
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* Created, December 13, 2000 by Wayne Holm
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* End Change Activity
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*/
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+#include <linux/config.h>
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#include <linux/pci.h>
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#include <linux/init.h>
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#include <linux/threads.h>
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@@ -30,11 +32,12 @@
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#include <linux/string.h>
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#include <linux/bootmem.h>
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#include <linux/ide.h>
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-
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#include <linux/irq.h>
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#include <linux/spinlock.h>
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-#include <asm/ppcdebug.h>
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+#include <asm/ppcdebug.h>
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+#include <asm/iSeries/HvTypes.h>
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+#include <asm/iSeries/HvLpEvent.h>
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#include <asm/iSeries/HvCallPci.h>
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#include <asm/iSeries/HvCallXm.h>
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#include <asm/iSeries/iSeries_irq.h>
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@@ -46,6 +49,169 @@ unsigned int virt_irq_to_real_map[NR_IRQS];
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/* Note: the pcnet32 driver assumes irq numbers < 2 aren't valid. :( */
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static int next_virtual_irq = 2;
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+static long Pci_Interrupt_Count;
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+static long Pci_Event_Count;
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+
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+enum XmPciLpEvent_Subtype {
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+ XmPciLpEvent_BusCreated = 0, // PHB has been created
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+ XmPciLpEvent_BusError = 1, // PHB has failed
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+ XmPciLpEvent_BusFailed = 2, // Msg to Secondary, Primary failed bus
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+ XmPciLpEvent_NodeFailed = 4, // Multi-adapter bridge has failed
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+ XmPciLpEvent_NodeRecovered = 5, // Multi-adapter bridge has recovered
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+ XmPciLpEvent_BusRecovered = 12, // PHB has been recovered
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+ XmPciLpEvent_UnQuiesceBus = 18, // Secondary bus unqiescing
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+ XmPciLpEvent_BridgeError = 21, // Bridge Error
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+ XmPciLpEvent_SlotInterrupt = 22 // Slot interrupt
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+};
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+
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+struct XmPciLpEvent_BusInterrupt {
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+ HvBusNumber busNumber;
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+ HvSubBusNumber subBusNumber;
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+};
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+
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+struct XmPciLpEvent_NodeInterrupt {
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+ HvBusNumber busNumber;
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+ HvSubBusNumber subBusNumber;
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+ HvAgentId deviceId;
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+};
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+
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+struct XmPciLpEvent {
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+ struct HvLpEvent hvLpEvent;
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+
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+ union {
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+ u64 alignData; // Align on an 8-byte boundary
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+
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+ struct {
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+ u32 fisr;
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+ HvBusNumber busNumber;
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+ HvSubBusNumber subBusNumber;
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+ HvAgentId deviceId;
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+ } slotInterrupt;
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+
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+ struct XmPciLpEvent_BusInterrupt busFailed;
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+ struct XmPciLpEvent_BusInterrupt busRecovered;
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+ struct XmPciLpEvent_BusInterrupt busCreated;
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+
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+ struct XmPciLpEvent_NodeInterrupt nodeFailed;
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+ struct XmPciLpEvent_NodeInterrupt nodeRecovered;
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+
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+ } eventData;
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+
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+};
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+
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+static void intReceived(struct XmPciLpEvent *eventParm,
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+ struct pt_regs *regsParm)
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+{
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+ int irq;
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+
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+ ++Pci_Interrupt_Count;
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+#if 0
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+ PPCDBG(PPCDBG_BUSWALK, "PCI: XmPciLpEvent.c: intReceived\n");
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+#endif
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+
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+ switch (eventParm->hvLpEvent.xSubtype) {
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+ case XmPciLpEvent_SlotInterrupt:
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+ irq = eventParm->hvLpEvent.xCorrelationToken;
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+ /* Dispatch the interrupt handlers for this irq */
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+ ppc_irq_dispatch_handler(regsParm, irq);
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+ HvCallPci_eoi(eventParm->eventData.slotInterrupt.busNumber,
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+ eventParm->eventData.slotInterrupt.subBusNumber,
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+ eventParm->eventData.slotInterrupt.deviceId);
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+ break;
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+ /* Ignore error recovery events for now */
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+ case XmPciLpEvent_BusCreated:
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+ printk(KERN_INFO "XmPciLpEvent.c: system bus %d created\n",
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+ eventParm->eventData.busCreated.busNumber);
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+ break;
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+ case XmPciLpEvent_BusError:
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+ case XmPciLpEvent_BusFailed:
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+ printk(KERN_INFO "XmPciLpEvent.c: system bus %d failed\n",
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+ eventParm->eventData.busFailed.busNumber);
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+ break;
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+ case XmPciLpEvent_BusRecovered:
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+ case XmPciLpEvent_UnQuiesceBus:
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+ printk(KERN_INFO "XmPciLpEvent.c: system bus %d recovered\n",
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+ eventParm->eventData.busRecovered.busNumber);
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+ break;
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+ case XmPciLpEvent_NodeFailed:
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+ case XmPciLpEvent_BridgeError:
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+ printk(KERN_INFO
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+ "XmPciLpEvent.c: multi-adapter bridge %d/%d/%d failed\n",
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+ eventParm->eventData.nodeFailed.busNumber,
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+ eventParm->eventData.nodeFailed.subBusNumber,
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+ eventParm->eventData.nodeFailed.deviceId);
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+ break;
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+ case XmPciLpEvent_NodeRecovered:
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+ printk(KERN_INFO
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+ "XmPciLpEvent.c: multi-adapter bridge %d/%d/%d recovered\n",
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+ eventParm->eventData.nodeRecovered.busNumber,
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+ eventParm->eventData.nodeRecovered.subBusNumber,
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+ eventParm->eventData.nodeRecovered.deviceId);
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+ break;
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+ default:
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+ printk(KERN_ERR
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+ "XmPciLpEvent.c: unrecognized event subtype 0x%x\n",
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+ eventParm->hvLpEvent.xSubtype);
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+ break;
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+ }
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+}
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+
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+static void XmPciLpEvent_handler(struct HvLpEvent *eventParm,
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+ struct pt_regs *regsParm)
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+{
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+#ifdef CONFIG_PCI
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+#if 0
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+ PPCDBG(PPCDBG_BUSWALK, "XmPciLpEvent_handler, type 0x%x\n",
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+ eventParm->xType);
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+#endif
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+ ++Pci_Event_Count;
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+
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+ if (eventParm && (eventParm->xType == HvLpEvent_Type_PciIo)) {
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+ switch (eventParm->xFlags.xFunction) {
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+ case HvLpEvent_Function_Int:
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+ intReceived((struct XmPciLpEvent *)eventParm, regsParm);
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+ break;
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+ case HvLpEvent_Function_Ack:
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+ printk(KERN_ERR
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+ "XmPciLpEvent.c: unexpected ack received\n");
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+ break;
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+ default:
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+ printk(KERN_ERR
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+ "XmPciLpEvent.c: unexpected event function %d\n",
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+ (int)eventParm->xFlags.xFunction);
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+ break;
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+ }
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+ } else if (eventParm)
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+ printk(KERN_ERR
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+ "XmPciLpEvent.c: Unrecognized PCI event type 0x%x\n",
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+ (int)eventParm->xType);
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+ else
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+ printk(KERN_ERR "XmPciLpEvent.c: NULL event received\n");
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+#endif
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+}
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+
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+/* This should be called sometime prior to buswalk (init_IRQ would be good) */
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+int XmPciLpEvent_init()
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+{
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+ int xRc;
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+
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+ PPCDBG(PPCDBG_BUSWALK,
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+ "XmPciLpEvent_init, Register Event type 0x%04X\n",
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+ HvLpEvent_Type_PciIo);
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+
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+ xRc = HvLpEvent_registerHandler(HvLpEvent_Type_PciIo,
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+ &XmPciLpEvent_handler);
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+ if (xRc == 0) {
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+ xRc = HvLpEvent_openPath(HvLpEvent_Type_PciIo, 0);
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+ if (xRc != 0)
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+ printk(KERN_ERR "XmPciLpEvent.c: open event path "
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+ "failed with rc 0x%x\n", xRc);
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+ } else
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+ printk(KERN_ERR "XmPciLpEvent.c: register handler "
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+ "failed with rc 0x%x\n", xRc);
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+ return xRc;
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+}
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+
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/* This is called by init_IRQ. set in ppc_md.init_IRQ by iSeries_setup.c */
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void __init iSeries_init_IRQ(void)
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{
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Stephen Rothwell