[MIPS] TXx9: PCI error handling
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>
diff --git a/arch/mips/pci/ops-tx4927.c b/arch/mips/pci/ops-tx4927.c
index 038e311..5989e74 100644
--- a/arch/mips/pci/ops-tx4927.c
+++ b/arch/mips/pci/ops-tx4927.c
@@ -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 @@
}
}
+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)
{