[RFC v7 3/7] migration/dlpar: Add operation queuing function

[Michael Bringmann]

migration/dlpar: This patch adds function dlpar_queue_action()
which will queue a worker function to invoke an operation
according to resource type, action code, and DRC index.  Initial
usage is for the 'readd' CPU and Memory blocks identified as
having changed their associativity during a migration event.

Signed-off-by: Michael Bringmann <mwb at linux.vnet.ibm.com>
---
Changes in RFC:
  -- Correct drc_index for dlpar_queue_action worker invocation
  -- Correct text of notice
---
 arch/powerpc/platforms/pseries/dlpar.c   |   14 ++++++++++++++
 arch/powerpc/platforms/pseries/pseries.h |    1 +
 2 files changed, 15 insertions(+)

diff --git a/arch/powerpc/platforms/pseries/dlpar.c b/arch/powerpc/platforms/pseries/dlpar.c
index a0b20c0..1376f50 100644
--- a/arch/powerpc/platforms/pseries/dlpar.c
+++ b/arch/powerpc/platforms/pseries/dlpar.c
@@ -407,6 +407,20 @@ void queue_hotplug_event(struct pseries_hp_errorlog *hp_errlog,
 	}
 }
 
+int dlpar_queue_action(int resource, int action, u32 drc_index)
+{
+	struct pseries_hp_errorlog hp_elog;
+
+	hp_elog.resource = resource;
+	hp_elog.action = action;
+	hp_elog.id_type = PSERIES_HP_ELOG_ID_DRC_INDEX;
+	hp_elog._drc_u.drc_index = cpu_to_be32(drc_index);
+
+	queue_hotplug_event(&hp_elog, NULL, NULL);
+
+	return 0;
+}
+
 static int dlpar_parse_resource(char **cmd, struct pseries_hp_errorlog *hp_elog)
 {
 	char *arg;
diff --git a/arch/powerpc/platforms/pseries/pseries.h b/arch/powerpc/platforms/pseries/pseries.h
index 60db2ee..cb2beb1 100644
--- a/arch/powerpc/platforms/pseries/pseries.h
+++ b/arch/powerpc/platforms/pseries/pseries.h
@@ -61,6 +61,7 @@ extern struct device_node *dlpar_configure_connector(__be32,
 
 void queue_hotplug_event(struct pseries_hp_errorlog *hp_errlog,
 			 struct completion *hotplug_done, int *rc);
+extern int dlpar_queue_action(int resource, int action, u32 drc_index);
 #ifdef CONFIG_MEMORY_HOTPLUG
 int dlpar_memory(struct pseries_hp_errorlog *hp_elog);
 #else