Commit 8c8639df authored by Mike Day's avatar Mike Day Committed by Alexander Graf
Browse files

spapr_rtas: add set-indicator RTAS interface 



This interface allows a guest to control various platform/device
sensors. Initially, we only implement support necessary to control
sensors that are required for hotplug: DR connector indicators/LEDs,
resource allocation state, and resource isolation state.

See docs/specs/ppc-spapr-hotplug.txt for a complete description of
this interface.

Signed-off-by: default avatarMike Day <ncmike@ncultra.org>
Signed-off-by: default avatarMichael Roth <mdroth@linux.vnet.ibm.com>
Reviewed-by: default avatarDavid Gibson <david@gibson.dropbear.id.au>
Signed-off-by: default avatarDavid Gibson <david@gibson.dropbear.id.au>
Signed-off-by: default avatarAlexander Graf <agraf@suse.de>
parent 094d2058

hw/ppc/spapr_rtas.c

+84 −0
Original line number Diff line number Diff line
@@ -35,6 +35,18 @@ 
#include "qapi-event.h"



#include <libfdt.h>

#include "hw/ppc/spapr_drc.h"



/* #define DEBUG_SPAPR */



#ifdef DEBUG_SPAPR

#define DPRINTF(fmt, ...) \

    do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)

#else

#define DPRINTF(fmt, ...) \

    do { } while (0)

#endif





static void rtas_display_character(PowerPCCPU *cpu, sPAPREnvironment *spapr,

                                   uint32_t token, uint32_t nargs,
@@ -295,6 +307,76 @@ static void rtas_get_power_level(PowerPCCPU *cpu, sPAPREnvironment *spapr, 
    rtas_st(rets, 1, 100);

}



static bool sensor_type_is_dr(uint32_t sensor_type)

{

    switch (sensor_type) {

    case RTAS_SENSOR_TYPE_ISOLATION_STATE:

    case RTAS_SENSOR_TYPE_DR:

    case RTAS_SENSOR_TYPE_ALLOCATION_STATE:

        return true;

    }



    return false;

}



static void rtas_set_indicator(PowerPCCPU *cpu, sPAPREnvironment *spapr,

                               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;

    sPAPRDRConnector *drc;

    sPAPRDRConnectorClass *drck;



    if (nargs != 3 || nret != 1) {

        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);

        return;

    }



    sensor_type = rtas_ld(args, 0);

    sensor_index = rtas_ld(args, 1);

    sensor_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_dr_connector_by_index(sensor_index);

    if (!drc) {

        DPRINTF("rtas_set_indicator: invalid sensor/DRC index: %xh\n",

                sensor_index);

        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);

        return;

    }

    drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);



    switch (sensor_type) {

    case RTAS_SENSOR_TYPE_ISOLATION_STATE:

        drck->set_isolation_state(drc, sensor_state);

        break;

    case RTAS_SENSOR_TYPE_DR:

        drck->set_indicator_state(drc, sensor_state);

        break;

    case RTAS_SENSOR_TYPE_ALLOCATION_STATE:

        drck->set_allocation_state(drc, sensor_state);

        break;

    default:

        goto out_unimplemented;

    }



    rtas_st(rets, 0, RTAS_OUT_SUCCESS);

    return;



out_unimplemented:

    /* currently only DR-related sensors are implemented */

    DPRINTF("rtas_set_indicator: sensor/indicator not implemented: %d\n",

            sensor_type);

    rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);

}



static struct rtas_call {

    const char *name;

    spapr_rtas_fn fn;
@@ -424,6 +506,8 @@ static void core_rtas_register_types(void) 
                        rtas_set_power_level);

    spapr_rtas_register(RTAS_GET_POWER_LEVEL, "get-power-level",

                        rtas_get_power_level);

    spapr_rtas_register(RTAS_SET_INDICATOR, "set-indicator",

                        rtas_set_indicator);

}



type_init(core_rtas_register_types)

include/hw/ppc/spapr.h

+11 −0
Original line number Diff line number Diff line
@@ -430,6 +430,17 @@ int spapr_allocate_irq_block(int num, bool lsi, bool msi); 
#define RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE        42

#define RTAS_SYSPARM_UUID                        48



/* RTAS indicator/sensor types

 *

 * as defined by PAPR+ 2.7 7.3.5.4, Table 41

 *

 * NOTE: currently only DR-related sensors are implemented here

 */

#define RTAS_SENSOR_TYPE_ISOLATION_STATE        9001

#define RTAS_SENSOR_TYPE_DR                     9002

#define RTAS_SENSOR_TYPE_ALLOCATION_STATE       9003

#define RTAS_SENSOR_TYPE_ENTITY_SENSE RTAS_SENSOR_TYPE_ALLOCATION_STATE



/* Possible values for the platform-processor-diagnostics-run-mode parameter

 * of the RTAS ibm,get-system-parameter call.

 */