#include <asm/iseries/it_lp_queue.h>
#include "irq.h"
+#include "pci.h"
#include "call_pci.h"
#if defined(CONFIG_SMP)
extern void iSeries_smp_message_recv(struct pt_regs *);
#endif
+#ifdef CONFIG_PCI
+
enum pci_event_type {
pe_bus_created = 0, /* PHB has been created */
pe_bus_error = 1, /* PHB has failed */
} data;
};
+static DEFINE_SPINLOCK(pending_irqs_lock);
+static int num_pending_irqs;
+static int pending_irqs[NR_IRQS];
+
static void int_received(struct pci_event *event, struct pt_regs *regs)
{
int irq;
-#ifdef CONFIG_IRQSTACKS
- struct thread_info *curtp, *irqtp;
-#endif
switch (event->event.xSubtype) {
case pe_slot_interrupt:
irq = event->event.xCorrelationToken;
- /* Dispatch the interrupt handlers for this irq */
-#ifdef CONFIG_IRQSTACKS
- /* Switch to the irq stack to handle this */
- curtp = current_thread_info();
- irqtp = hardirq_ctx[smp_processor_id()];
- if (curtp != irqtp) {
- irqtp->task = curtp->task;
- irqtp->flags = 0;
- call___do_IRQ(irq, regs, irqtp);
- irqtp->task = NULL;
- if (irqtp->flags)
- set_bits(irqtp->flags, &curtp->flags);
- } else
-#endif
- __do_IRQ(irq, regs);
+ if (irq < NR_IRQS) {
+ spin_lock(&pending_irqs_lock);
+ pending_irqs[irq]++;
+ num_pending_irqs++;
+ spin_unlock(&pending_irqs_lock);
+ } else {
+ printk(KERN_WARNING "int_received: bad irq number %d\n",
+ irq);
+ HvCallPci_eoi(event->data.slot.bus_number,
+ event->data.slot.sub_bus_number,
+ event->data.slot.dev_id);
+ }
break;
/* Ignore error recovery events for now */
case pe_bus_created:
static void pci_event_handler(struct HvLpEvent *event, struct pt_regs *regs)
{
if (event && (event->xType == HvLpEvent_Type_PciIo)) {
- switch (event->xFlags.xFunction) {
- case HvLpEvent_Function_Int:
+ if (hvlpevent_is_int(event))
int_received((struct pci_event *)event, regs);
- break;
- case HvLpEvent_Function_Ack:
+ else
printk(KERN_ERR
"pci_event_handler: unexpected ack received\n");
- break;
- default:
- printk(KERN_ERR
- "pci_event_handler: unexpected event function %d\n",
- (int)event->xFlags.xFunction);
- break;
- }
} else if (event)
printk(KERN_ERR
"pci_event_handler: Unrecognized PCI event type 0x%x\n",
* Note that sub_bus is always 0 (at the moment at least).
*/
int __init iSeries_allocate_IRQ(HvBusNumber bus,
- HvSubBusNumber sub_bus, HvAgentId dev_id)
+ HvSubBusNumber sub_bus, u32 bsubbus)
{
int virtirq;
unsigned int realirq;
- u8 idsel = (dev_id >> 4);
- u8 function = dev_id & 7;
+ u8 idsel = ISERIES_GET_DEVICE_FROM_SUBBUS(bsubbus);
+ u8 function = ISERIES_GET_FUNCTION_FROM_SUBBUS(bsubbus);
realirq = (((((sub_bus << 8) + (bus - 1)) << 3) + (idsel - 1)) << 3)
+ function;
return virtirq;
}
+#endif /* CONFIG_PCI */
+
/*
* Get the next pending IRQ.
*/
int iSeries_get_irq(struct pt_regs *regs)
{
- struct paca_struct *lpaca;
+ /* -2 means ignore this interrupt */
+ int irq = -2;
- lpaca = get_paca();
#ifdef CONFIG_SMP
- if (lpaca->lppaca.int_dword.fields.ipi_cnt) {
- lpaca->lppaca.int_dword.fields.ipi_cnt = 0;
+ if (get_lppaca()->int_dword.fields.ipi_cnt) {
+ get_lppaca()->int_dword.fields.ipi_cnt = 0;
iSeries_smp_message_recv(regs);
}
#endif /* CONFIG_SMP */
if (hvlpevent_is_pending())
process_hvlpevents(regs);
- /* -2 means ignore this interrupt */
- return -2;
+#ifdef CONFIG_PCI
+ if (num_pending_irqs) {
+ spin_lock(&pending_irqs_lock);
+ for (irq = 0; irq < NR_IRQS; irq++) {
+ if (pending_irqs[irq]) {
+ pending_irqs[irq]--;
+ num_pending_irqs--;
+ break;
+ }
+ }
+ spin_unlock(&pending_irqs_lock);
+ if (irq >= NR_IRQS)
+ irq = -2;
+ }
+#endif
+
+ return irq;
}