diff options
Diffstat (limited to 'arch/ppc64/kernel/iSeries_irq.c')
| -rw-r--r-- | arch/ppc64/kernel/iSeries_irq.c | 170 |
1 files changed, 168 insertions, 2 deletions
diff --git a/arch/ppc64/kernel/iSeries_irq.c b/arch/ppc64/kernel/iSeries_irq.c index 41902e358e76..96a1f8cd67e7 100644 --- a/arch/ppc64/kernel/iSeries_irq.c +++ b/arch/ppc64/kernel/iSeries_irq.c @@ -1,6 +1,7 @@ /* * 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 @@ -22,6 +23,7 @@ * 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> @@ -30,11 +32,12 @@ #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> @@ -46,6 +49,169 @@ unsigned int virt_irq_to_real_map[NR_IRQS]; /* 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) { |