diff options
Diffstat (limited to 'sys/powerpc/powernv/opal_sensor.c')
| -rw-r--r-- | sys/powerpc/powernv/opal_sensor.c | 327 |
1 files changed, 327 insertions, 0 deletions
diff --git a/sys/powerpc/powernv/opal_sensor.c b/sys/powerpc/powernv/opal_sensor.c new file mode 100644 index 000000000000..5e99884e83e0 --- /dev/null +++ b/sys/powerpc/powernv/opal_sensor.c @@ -0,0 +1,327 @@ +/*- + * Copyright (C) 2018 Justin Hibbits + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; + * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR + * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF + * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/param.h> +#include <sys/kernel.h> +#include <sys/lock.h> +#include <sys/module.h> +#include <sys/mutex.h> +#include <sys/proc.h> +#include <sys/sysctl.h> +#include <sys/systm.h> +#include <sys/endian.h> + +#include <vm/vm.h> +#include <vm/pmap.h> + +#include <machine/bus.h> + +#include <dev/ofw/openfirm.h> +#include <dev/ofw/ofw_bus.h> +#include <dev/ofw/ofw_bus_subr.h> + +#include "opal.h" + +struct opal_sensor_softc { + device_t sc_dev; + struct mtx sc_mtx; + uint32_t sc_handle; + uint32_t sc_min_handle; + uint32_t sc_max_handle; + char *sc_label; + int sc_type; +}; + +#define SENSOR_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx) +#define SENSOR_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx) +#define SENSOR_LOCK_INIT(_sc) \ + mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->sc_dev), \ + "opal-sensor", MTX_DEF) + +/* + * A bit confusing, maybe. There are two types of nodes with compatible strings + * of "ibm,opal-sensor". One hangs off /ibm,opal/, named "sensors", the other + * hangs off of this node. For newbus attachments, we have one node (opalsens) + * attach from opal0, and the others (opal_sensor) attach from opalsens. These + * are the real sensors. + */ +enum opal_sensor_type { + OPAL_SENSOR_TEMP = 0, /* From OPAL: degC */ + OPAL_SENSOR_FAN = 1, /* From OPAL: RPM */ + OPAL_SENSOR_POWER = 2, /* From OPAL: W */ + OPAL_SENSOR_IN = 3, /* From OPAL: mV */ + OPAL_SENSOR_ENERGY = 4, /* From OPAL: uJ */ + OPAL_SENSOR_CURR = 5, /* From OPAL: mA */ + OPAL_SENSOR_MAX +}; + +/* This must be kept sorted with the enum above. */ +const char *opal_sensor_types[] = { + "temp", + "fan", + "power", + "in", + "energy", + "curr" +}; + +/* + * Retrieve the raw value from OPAL. This will be cooked by the sysctl handler. + */ +static int +opal_sensor_get_val(struct opal_sensor_softc *sc, uint32_t key, uint64_t *val) +{ + struct opal_msg msg; + uint32_t val32; + int rv, token; + + token = opal_alloc_async_token(); + SENSOR_LOCK(sc); + rv = opal_call(OPAL_SENSOR_READ, key, token, vtophys(&val32)); + + if (rv == OPAL_ASYNC_COMPLETION) { + /* Sleep a little to let things settle. */ + DELAY(100); + bzero(&msg, sizeof(msg)); + rv = opal_wait_completion(&msg, sizeof(msg), token); + + if (rv == OPAL_SUCCESS) + val32 = msg.params[0]; + } + SENSOR_UNLOCK(sc); + + if (rv == OPAL_SUCCESS) + *val = be32toh(val32); + else + rv = EIO; + + opal_free_async_token(token); + return (rv); +} + +static int +opal_sensor_sysctl(SYSCTL_HANDLER_ARGS) +{ + struct opal_sensor_softc *sc; + int error, result; + uint32_t sensor; + uint64_t sensval; + + sc = arg1; + sensor = arg2; + + error = opal_sensor_get_val(sc, sensor, &sensval); + + if (error) + return (error); + + result = sensval; + + switch (sc->sc_type) { + case OPAL_SENSOR_TEMP: + result = result * 10 + 2731; /* Convert to K */ + break; + case OPAL_SENSOR_POWER: + result = result * 1000; /* Convert to mW */ + break; + } + + error = sysctl_handle_int(oidp, &result, 0, req); + + return (error); +} + +static int +opal_sensor_probe(device_t dev) +{ + if (!ofw_bus_is_compatible(dev, "ibm,opal-sensor")) + return (ENXIO); + + device_set_desc(dev, "OPAL sensor"); + return (BUS_PROBE_GENERIC); +} + +static int +opal_sensor_attach(device_t dev) +{ + struct opal_sensor_softc *sc; + struct sysctl_ctx_list *ctx; + struct sysctl_oid *tree; + char type[8]; + phandle_t node; + cell_t sensor_id; + int i; + + sc = device_get_softc(dev); + sc->sc_dev = dev; + + node = ofw_bus_get_node(dev); + + if (OF_getencprop(node, "sensor-data", &sensor_id, sizeof(sensor_id)) < 0) { + device_printf(dev, "Missing sensor ID\n"); + return (ENXIO); + } + if (OF_getprop(node, "sensor-type", type, sizeof(type)) < 0) { + device_printf(dev, "Missing sensor type\n"); + return (ENXIO); + } + + sc->sc_type = -1; + for (i = 0; i < OPAL_SENSOR_MAX; i++) { + if (strcmp(type, opal_sensor_types[i]) == 0) { + sc->sc_type = i; + break; + } + } + if (sc->sc_type == -1) { + device_printf(dev, "Unknown sensor type '%s'\n", type); + return (ENXIO); + } + + ctx = device_get_sysctl_ctx(dev); + tree = device_get_sysctl_tree(dev); + + sc->sc_handle = sensor_id; + SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, + "sensor", CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, + sensor_id, opal_sensor_sysctl, + (sc->sc_type == OPAL_SENSOR_TEMP) ? "IK" : "I", "current value"); + + SYSCTL_ADD_STRING(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "type", + CTLFLAG_RD, __DECONST(char *, opal_sensor_types[sc->sc_type]), + 0, ""); + + OF_getprop_alloc(node, "label", (void **)&sc->sc_label); + SYSCTL_ADD_STRING(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "label", + CTLFLAG_RD, sc->sc_label, 0, ""); + + if (OF_getencprop(node, "sensor-data-min", + &sensor_id, sizeof(sensor_id)) > 0) { + sc->sc_min_handle = sensor_id; + SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, + "sensor_min", CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, + sc, sensor_id, opal_sensor_sysctl, + (sc->sc_type == OPAL_SENSOR_TEMP) ? "IK" : "I", + "minimum value"); + } + + if (OF_getencprop(node, "sensor-data-max", + &sensor_id, sizeof(sensor_id)) > 0) { + sc->sc_max_handle = sensor_id; + SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, + "sensor_max", CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, + sc, sensor_id, opal_sensor_sysctl, + (sc->sc_type == OPAL_SENSOR_TEMP) ? "IK" : "I", + "maximum value"); + } + + SENSOR_LOCK_INIT(sc); + + return (0); +} + +static device_method_t opal_sensor_methods[] = { + DEVMETHOD(device_probe, opal_sensor_probe), + DEVMETHOD(device_attach, opal_sensor_attach), + + DEVMETHOD_END +}; + +static driver_t opal_sensor_driver = { + "opal_sensor", + opal_sensor_methods, + sizeof(struct opal_sensor_softc) +}; + +DRIVER_MODULE(opal_sensor, opalsens, opal_sensor_driver, NULL, NULL); + +static int +opalsens_probe(device_t dev) +{ + + if (!ofw_bus_is_compatible(dev, "ibm,opal-sensor")) + return (ENXIO); + + device_set_desc(dev, "OPAL Sensors"); + return (BUS_PROBE_GENERIC); +} + +static int +opalsens_attach(device_t dev) +{ + phandle_t child; + device_t cdev; + struct ofw_bus_devinfo *dinfo; + + for (child = OF_child(ofw_bus_get_node(dev)); child != 0; + child = OF_peer(child)) { + dinfo = malloc(sizeof(*dinfo), M_DEVBUF, M_WAITOK | M_ZERO); + if (ofw_bus_gen_setup_devinfo(dinfo, child) != 0) { + free(dinfo, M_DEVBUF); + continue; + } + cdev = device_add_child(dev, NULL, DEVICE_UNIT_ANY); + if (cdev == NULL) { + device_printf(dev, "<%s>: device_add_child failed\n", + dinfo->obd_name); + ofw_bus_gen_destroy_devinfo(dinfo); + free(dinfo, M_DEVBUF); + continue; + } + device_set_ivars(cdev, dinfo); + } + + bus_attach_children(dev); + return (0); +} + +static const struct ofw_bus_devinfo * +opalsens_get_devinfo(device_t dev, device_t child) +{ + return (device_get_ivars(child)); +} + +static device_method_t opalsens_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, opalsens_probe), + DEVMETHOD(device_attach, opalsens_attach), + + /* ofw_bus interface */ + DEVMETHOD(ofw_bus_get_devinfo, opalsens_get_devinfo), + DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), + DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), + DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), + DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), + DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), + + DEVMETHOD_END +}; + +static driver_t opalsens_driver = { + "opalsens", + opalsens_methods, + 0 +}; + +DRIVER_MODULE(opalsens, opal, opalsens_driver, NULL, NULL); |