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[MIPS] TXx9: PCI error handling

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From: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Date: Thu, 24 Jul 2008 00:25:16 +0900
Subject: [PATCH] txx9: PCI error handling

Add more control and detailed report on PCI error interrupt.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Atsushi Nemoto
2008-07-25 23:01:35 +09:00
committed by Ralf Baechle
parent 0751752922
commit 455cc256eb
12 changed files with 132 additions and 20 deletions
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34
arch/mips/pci/ops-tx3927.c
View File

@@ -37,8 +37,11 @@
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <asm/addrspace.h>
#include <asm/txx9irq.h>
#include <asm/txx9/pci.h>
#include <asm/txx9/tx3927.h>
static int mkaddr(struct pci_bus *bus, unsigned char devfn, unsigned char where)
@@ -194,3 +197,34 @@ void __init tx3927_pcic_setup(struct pci_controller *channel,
PCI_COMMAND_PARITY | PCI_COMMAND_SERR;
local_irq_restore(flags);
}
static irqreturn_t tx3927_pcierr_interrupt(int irq, void *dev_id)
{
struct pt_regs *regs = get_irq_regs();
if (txx9_pci_err_action != TXX9_PCI_ERR_IGNORE) {
printk(KERN_WARNING "PCI error interrupt at 0x%08lx.\n",
regs->cp0_epc);
printk(KERN_WARNING "pcistat:%02x, lbstat:%04lx\n",
tx3927_pcicptr->pcistat, tx3927_pcicptr->lbstat);
}
if (txx9_pci_err_action != TXX9_PCI_ERR_PANIC) {
/* clear all pci errors */
tx3927_pcicptr->pcistat |= TX3927_PCIC_PCISTATIM_ALL;
tx3927_pcicptr->istat = TX3927_PCIC_IIM_ALL;
tx3927_pcicptr->tstat = TX3927_PCIC_TIM_ALL;
tx3927_pcicptr->lbstat = TX3927_PCIC_LBIM_ALL;
return IRQ_HANDLED;
}
console_verbose();
panic("PCI error.");
}
void __init tx3927_setup_pcierr_irq(void)
{
if (request_irq(TXX9_IRQ_BASE + TX3927_IR_PCI,
tx3927_pcierr_interrupt,
IRQF_DISABLED, "PCI error",
(void *)TX3927_PCIC_REG))
printk(KERN_WARNING "Failed to request irq for PCIERR\n");
}