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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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62
arch/mips/pci/ops-tx4927.c
View File

@ -16,6 +16,8 @@
* option) any later version.
*/
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <asm/txx9/pci.h>
#include <asm/txx9/tx4927pcic.h>
static struct {
@ -431,6 +433,66 @@ void tx4927_report_pcic_status(void)
}
}
static void tx4927_dump_pcic_settings1(struct tx4927_pcic_reg __iomem *pcicptr)
{
int i;
__u32 __iomem *preg = (__u32 __iomem *)pcicptr;
printk(KERN_INFO "tx4927 pcic (0x%p) settings:", pcicptr);
for (i = 0; i < sizeof(struct tx4927_pcic_reg); i += 4, preg++) {
if (i % 32 == 0) {
printk(KERN_CONT "\n");
printk(KERN_INFO "%04x:", i);
}
/* skip registers with side-effects */
if (i == offsetof(struct tx4927_pcic_reg, g2pintack)
|| i == offsetof(struct tx4927_pcic_reg, g2pspc)
|| i == offsetof(struct tx4927_pcic_reg, g2pcfgadrs)
|| i == offsetof(struct tx4927_pcic_reg, g2pcfgdata)) {
printk(KERN_CONT " XXXXXXXX");
continue;
}
printk(KERN_CONT " %08x", __raw_readl(preg));
}
printk(KERN_CONT "\n");
}
void tx4927_dump_pcic_settings(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(pcicptrs); i++) {
if (pcicptrs[i].pcicptr)
tx4927_dump_pcic_settings1(pcicptrs[i].pcicptr);
}
}
irqreturn_t tx4927_pcierr_interrupt(int irq, void *dev_id)
{
struct pt_regs *regs = get_irq_regs();
struct tx4927_pcic_reg __iomem *pcicptr =
(struct tx4927_pcic_reg __iomem *)(unsigned long)dev_id;
if (txx9_pci_err_action != TXX9_PCI_ERR_IGNORE) {
printk(KERN_WARNING "PCIERR interrupt at 0x%0*lx\n",
(int)(2 * sizeof(unsigned long)), regs->cp0_epc);
tx4927_report_pcic_status1(pcicptr);
}
if (txx9_pci_err_action != TXX9_PCI_ERR_PANIC) {
/* clear all pci errors */
__raw_writel((__raw_readl(&pcicptr->pcistatus) & 0x0000ffff)
| (TX4927_PCIC_PCISTATUS_ALL << 16),
&pcicptr->pcistatus);
__raw_writel(TX4927_PCIC_G2PSTATUS_ALL, &pcicptr->g2pstatus);
__raw_writel(TX4927_PCIC_PBASTATUS_ALL, &pcicptr->pbastatus);
__raw_writel(TX4927_PCIC_PCICSTATUS_ALL, &pcicptr->pcicstatus);
return IRQ_HANDLED;
}
console_verbose();
tx4927_dump_pcic_settings1(pcicptr);
panic("PCI error.");
}
#ifdef CONFIG_TOSHIBA_FPCIB0
static void __init tx4927_quirk_slc90e66_bridge(struct pci_dev *dev)
{