[MIPS] TXx9: PCI error handling

[linux-2.6-omap-h63xx.git] / arch / mips / pci / ops-tx3927.c

diff --git a/arch/mips/pci/ops-tx3927.c b/arch/mips/pci/ops-tx3927.c
index c6bd79e71e26508c3b64908f0df54973dd9c3477..31c15019659544a55f81f2675abf25f7a085640e 100644 (file)
--- a/arch/mips/pci/ops-tx3927.c
+++ b/arch/mips/pci/ops-tx3927.c
@@ -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");
+}