2 files changed, 40 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c
index fb91842fc819..4534886e3b4e 100644
--- a/arch/powerpc/platforms/pseries/eeh.c
+++ b/arch/powerpc/platforms/pseries/eeh.c
@@ -482,6 +482,35 @@ eeh_slot_availability(struct pci_dn *pdn)
 }
 
 /**
+ * rtas_pci_enable - enable MMIO or DMA transfers for this slot
+ * @pdn pci device node
+ */
+
+int
+rtas_pci_enable(struct pci_dn *pdn, int function)
+{
+        int config_addr;
+        int rc;
+
+        /* Use PE configuration address, if present */
+        config_addr = pdn->eeh_config_addr;
+        if (pdn->eeh_pe_config_addr)
+                config_addr = pdn->eeh_pe_config_addr;
+
+        rc = rtas_call(ibm_set_eeh_option, 4, 1, NULL,
+                       config_addr,
+                       BUID_HI(pdn->phb->buid),
+                       BUID_LO(pdn->phb->buid),
+                            function);
+
+        if (rc)
+                printk(KERN_WARNING "EEH: Cannot enable function %d, err=%d dn=%s\n",
+                        function, rc, pdn->node->full_name);
+
+        return rc;
+}
+
+/**
  * rtas_pci_slot_reset - raises/lowers the pci #RST line
  * @pdn pci device node
  * @state: 1/0 to raise/lower the #RST
diff --git a/include/asm-powerpc/ppc-pci.h b/include/asm-powerpc/ppc-pci.h
index cf79bc7ebb55..1115756c79f9 100644
--- a/include/asm-powerpc/ppc-pci.h
+++ b/include/asm-powerpc/ppc-pci.h
@@ -69,6 +69,17 @@ struct pci_dev *pci_get_device_by_addr(unsigned long addr);
 void eeh_slot_error_detail (struct pci_dn *pdn, int severity);
 
 /**
+ * rtas_pci_enableo - enable IO transfers for this slot
+ * @pdn:       pci device node
+ * @function:  either EEH_THAW_MMIO or EEH_THAW_DMA 
+ *
+ * Enable I/O transfers to this slot 
+ */
+#define EEH_THAW_MMIO 2
+#define EEH_THAW_DMA  3
+int rtas_pci_enable(struct pci_dn *pdn, int function);
+
+/**
  * rtas_set_slot_reset -- unfreeze a frozen slot
  *
  * Clear the EEH-frozen condition on a slot.  This routine