1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
191 lines
5.2 KiB
C
191 lines
5.2 KiB
C
/*
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* File XmPciLpEvent.h created by Wayne Holm on Mon Jan 15 2001.
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*
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* This module handles PCI interrupt events sent by the iSeries Hypervisor.
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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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#include <linux/smp.h>
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#include <linux/param.h>
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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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#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/XmPciLpEvent.h>
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#include <asm/ppcdebug.h>
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static long Pci_Interrupt_Count;
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static long Pci_Event_Count;
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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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struct XmPciLpEvent_BusInterrupt {
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HvBusNumber busNumber;
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HvSubBusNumber subBusNumber;
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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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struct XmPciLpEvent {
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struct HvLpEvent hvLpEvent;
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union {
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u64 alignData; // Align on an 8-byte boundary
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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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struct XmPciLpEvent_BusInterrupt busFailed;
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struct XmPciLpEvent_BusInterrupt busRecovered;
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struct XmPciLpEvent_BusInterrupt busCreated;
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struct XmPciLpEvent_NodeInterrupt nodeFailed;
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struct XmPciLpEvent_NodeInterrupt nodeRecovered;
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} eventData;
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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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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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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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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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++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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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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/* 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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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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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
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"XmPciLpEvent.c: open event path failed with rc 0x%x\n",
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xRc);
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} else
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printk(KERN_ERR
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"XmPciLpEvent.c: register handler failed with rc 0x%x\n",
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xRc);
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return xRc;
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}
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