spapr: Clean up RTAS set-indicator

In theory the RTAS set-indicator call can be used for a number of
"indicators" defined by PAPR.  In practice the only ones we're ever likely
to implement are those used for Dynamic Reconfiguration (i.e. hotplug).
Because of this, the current implementation determines the associated DRC
object, before dispatching based on the type of indicator.

However, this means we also need a check that we're dealing with a DR
related indicator at all, which duplicates some of the logic from the
switch further down.

Even though it means a bit of code duplication, things work out cleaner if
we delegate the DRC lookup to the individual indicator type functions -
and it also allows some further cleanups.

While we're there, remove references to "sensor", a copy/paste artefact
from the related, but distinct "get-sensor" call.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Acked-by: Michael Roth <mdroth@linux.vnet.ibm.com>

hw/ppc/spapr_drc.c

@@ -903,74 +903,78 @@ out:
  * RTAS calls
  */
 
-static bool sensor_type_is_dr(uint32_t sensor_type)
+static uint32_t rtas_set_isolation_state(uint32_t idx, uint32_t state)
 {
-    switch (sensor_type) {
-    case RTAS_SENSOR_TYPE_ISOLATION_STATE:
-    case RTAS_SENSOR_TYPE_DR:
-    case RTAS_SENSOR_TYPE_ALLOCATION_STATE:
-        return true;
+    sPAPRDRConnector *drc = spapr_drc_by_index(idx);
+    sPAPRDRConnectorClass *drck;
+
+    if (!drc) {
+        return RTAS_OUT_PARAM_ERROR;
     }
 
-    return false;
+    drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
+    return drck->set_isolation_state(drc, state);
+}
+
+static uint32_t rtas_set_allocation_state(uint32_t idx, uint32_t state)
+{
+    sPAPRDRConnector *drc = spapr_drc_by_index(idx);
+    sPAPRDRConnectorClass *drck;
+
+    if (!drc) {
+        return RTAS_OUT_PARAM_ERROR;
+    }
+
+    drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
+    return drck->set_allocation_state(drc, state);
+}
+
+static uint32_t rtas_set_indicator_state(uint32_t idx, uint32_t state)
+{
+    sPAPRDRConnector *drc = spapr_drc_by_index(idx);
+    sPAPRDRConnectorClass *drck;
+
+    if (!drc) {
+        return RTAS_OUT_PARAM_ERROR;
+    }
+
+    drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
+    return drck->set_indicator_state(drc, state);
 }
 
 static void rtas_set_indicator(PowerPCCPU *cpu, sPAPRMachineState *spapr,
-                               uint32_t token, uint32_t nargs,
-                               target_ulong args, uint32_t nret,
-                               target_ulong rets)
+                               uint32_t token,
+                               uint32_t nargs, target_ulong args,
+                               uint32_t nret, target_ulong rets)
 {
-    uint32_t sensor_type;
-    uint32_t sensor_index;
-    uint32_t sensor_state;
+    uint32_t type, idx, state;
     uint32_t ret = RTAS_OUT_SUCCESS;
-    sPAPRDRConnector *drc;
-    sPAPRDRConnectorClass *drck;
 
     if (nargs != 3 || nret != 1) {
         ret = RTAS_OUT_PARAM_ERROR;
         goto out;
     }
 
-    sensor_type = rtas_ld(args, 0);
-    sensor_index = rtas_ld(args, 1);
-    sensor_state = rtas_ld(args, 2);
+    type = rtas_ld(args, 0);
+    idx = rtas_ld(args, 1);
+    state = rtas_ld(args, 2);
 
-    if (!sensor_type_is_dr(sensor_type)) {
-        goto out_unimplemented;
-    }
-
-    /* if this is a DR sensor we can assume sensor_index == drc_index */
-    drc = spapr_drc_by_index(sensor_index);
-    if (!drc) {
-        trace_spapr_rtas_set_indicator_invalid(sensor_index);
-        ret = RTAS_OUT_PARAM_ERROR;
-        goto out;
-    }
-    drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
-
-    switch (sensor_type) {
+    switch (type) {
     case RTAS_SENSOR_TYPE_ISOLATION_STATE:
-        ret = drck->set_isolation_state(drc, sensor_state);
+        ret = rtas_set_isolation_state(idx, state);
         break;
     case RTAS_SENSOR_TYPE_DR:
-        ret = drck->set_indicator_state(drc, sensor_state);
+        ret = rtas_set_indicator_state(idx, state);
         break;
     case RTAS_SENSOR_TYPE_ALLOCATION_STATE:
-        ret = drck->set_allocation_state(drc, sensor_state);
+        ret = rtas_set_allocation_state(idx, state);
         break;
     default:
-        goto out_unimplemented;
+        ret = RTAS_OUT_NOT_SUPPORTED;
     }
 
 out:
     rtas_st(rets, 0, ret);
-    return;
-
-out_unimplemented:
-    /* currently only DR-related sensors are implemented */
-    trace_spapr_rtas_set_indicator_not_supported(sensor_index, sensor_type);
-    rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
 }
 
 static void rtas_get_sensor_state(PowerPCCPU *cpu, sPAPRMachineState *spapr,

hw/ppc/trace-events

@@ -60,8 +60,6 @@ spapr_ovec_parse_vector(int vector, int byte, uint16_t vec_len, uint8_t entry) "
 spapr_ovec_populate_dt(int byte, uint16_t vec_len, uint8_t entry) "encoding guest vector byte %3d / %3d: 0x%.2x"
 
 # hw/ppc/spapr_rtas.c
-spapr_rtas_set_indicator_invalid(uint32_t index) "sensor index: 0x%"PRIx32
-spapr_rtas_set_indicator_not_supported(uint32_t index, uint32_t type) "sensor index: 0x%"PRIx32", type: %"PRIu32
 spapr_rtas_get_sensor_state_not_supported(uint32_t index, uint32_t type) "sensor index: 0x%"PRIx32", type: %"PRIu32
 spapr_rtas_get_sensor_state_invalid(uint32_t index) "sensor index: 0x%"PRIx32
 spapr_rtas_ibm_configure_connector_invalid(uint32_t index) "DRC index: 0x%"PRIx32