spapr_drc: add spapr_drc_populate_dt()

This function handles generation of ibm,drc-* array device tree
properties to describe DRC topology to guests. This will by used
by the guest to direct RTAS calls to manage any dynamic resources
we associate with a particular DR Connector as part of
hotplug/unplug.

Since general management of boot-time device trees are handled
outside of sPAPRDRConnector, we insert these values blindly given
an FDT and offset. A mask of sPAPRDRConnector types is given to
instruct us on what types of connectors entries should be generated
for, since descriptions for different connectors may live in
different parts of the device tree.

Based on code originally written by Nathan Fontenot.

Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/hw/ppc/spapr_drc.h b/include/hw/ppc/spapr_drc.h
index 34fdef9..60cda35 100644
--- a/include/hw/ppc/spapr_drc.h
+++ b/include/hw/ppc/spapr_drc.h
@@ -195,5 +195,7 @@ sPAPRDRConnector *spapr_dr_connector_new(Object *owner,
 sPAPRDRConnector *spapr_dr_connector_by_index(uint32_t index);
 sPAPRDRConnector *spapr_dr_connector_by_id(sPAPRDRConnectorType type,
                                            uint32_t id);
+int spapr_drc_populate_dt(void *fdt, int fdt_offset, Object *owner,
+                          uint32_t drc_type_mask);
 
 #endif /* __HW_SPAPR_DRC_H__ */