[POWERPC] EEH: enable MMIO/DMA on frozen slot

[linux-2.6] / arch / powerpc / platforms / pseries / eeh.c

diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c
index fb91842fc81945a1f7f04e5960ca9adbcf8f9e0d..4534886e3b4e5c3c4d86f6f9b122a113643ac2b3 100644 (file)
--- a/arch/powerpc/platforms/pseries/eeh.c
+++ b/arch/powerpc/platforms/pseries/eeh.c
@@ -481,6 +481,35 @@ eeh_slot_availability(struct pci_dn *pdn)
        return -1;
 }
 
+/**
+ * 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