[POWERPC] EEH: enable MMIO/DMA on frozen slot
Add wrapper around the rtas call to enable MMIO or DMA on a frozen pci
slot.
Signed-off-by: Linas Vepstas <linas@austin.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c
index fb91842..4534886 100644
--- a/arch/powerpc/platforms/pseries/eeh.c
+++ b/arch/powerpc/platforms/pseries/eeh.c
@@ -482,6 +482,35 @@
}
/**
+ * 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 cf79bc7..1115756 100644
--- a/include/asm-powerpc/ppc-pci.h
+++ b/include/asm-powerpc/ppc-pci.h
@@ -69,6 +69,17 @@
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