Author: jhibbits Date: Tue May 22 02:42:53 2018 New Revision: 334011 URL: https://svnweb.freebsd.org/changeset/base/334011
Log: Basic OPAL sensor support for POWER9 platforms Summary: PowerNV architectures (in the test case POWER9) export sensors via the device tree, which are accessed via OPAL calls. This adds sysctl nodes for each device in a generic fashion. New sysctl nodes are: dev.opal_sensor.N.sensor dev.opal_sensor.N.sensor_min dev.opal_sensor.N.sensor_max dev.opal_sensor.N.type dev.opal_sensor.N.label These are rooted at a parent attachment under opal, called opalsens. This does not add support for the "sensor groups" defined in the device tree. Reviewed by: breno.leitao_gmail.com Differential Revision: https://reviews.freebsd.org/D15362 Added: head/sys/powerpc/powernv/opal_sensor.c (contents, props changed) Modified: head/sys/conf/files.powerpc head/sys/powerpc/powernv/opal.h Modified: head/sys/conf/files.powerpc ============================================================================== --- head/sys/conf/files.powerpc Tue May 22 02:13:04 2018 (r334010) +++ head/sys/conf/files.powerpc Tue May 22 02:42:53 2018 (r334011) @@ -189,6 +189,7 @@ powerpc/powernv/opal_dev.c optional powernv powerpc/powernv/opal_i2c.c optional iicbus fdt powernv powerpc/powernv/opal_i2cm.c optional iicbus fdt powernv powerpc/powernv/opal_pci.c optional powernv pci +powerpc/powernv/opal_sensor.c optional powernv powerpc/powernv/opalcall.S optional powernv powerpc/powernv/platform_powernv.c optional powernv powerpc/powernv/powernv_centaur.c optional powernv Modified: head/sys/powerpc/powernv/opal.h ============================================================================== --- head/sys/powerpc/powernv/opal.h Tue May 22 02:13:04 2018 (r334010) +++ head/sys/powerpc/powernv/opal.h Tue May 22 02:42:53 2018 (r334011) @@ -72,6 +72,7 @@ int opal_call(uint64_t token, ...); #define OPAL_RETURN_CPU 69 #define OPAL_REINIT_CPUS 70 #define OPAL_CHECK_ASYNC_COMPLETION 86 +#define OPAL_SENSOR_READ 88 #define OPAL_I2C_REQUEST 109 #define OPAL_INT_GET_XIRR 122 #define OPAL_INT_SET_CPPR 123 @@ -79,6 +80,9 @@ int opal_call(uint64_t token, ...); #define OPAL_INT_SET_MFRR 125 #define OPAL_PCI_TCE_KILL 126 #define OPAL_XIVE_RESET 128 +#define OPAL_SENSOR_GROUP_CLEAR 156 +#define OPAL_SENSOR_READ_U64 162 +#define OPAL_SENSOR_GROUP_ENABLE 163 /* For OPAL_PCI_SET_PE */ #define OPAL_UNMAP_PE 0 Added: head/sys/powerpc/powernv/opal_sensor.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/powerpc/powernv/opal_sensor.c Tue May 22 02:42:53 2018 (r334011) @@ -0,0 +1,336 @@ +/*- + * 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/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/kernel.h> +#include <sys/systm.h> +#include <sys/module.h> +#include <sys/types.h> +#include <sys/proc.h> +#include <sys/sysctl.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(uint32_t key, uint64_t *val) +{ + struct opal_msg msg; + uint32_t val32; + int i, rv; + + rv = opal_call(OPAL_SENSOR_READ, key, key, vtophys(&val32)); + + if (rv == OPAL_ASYNC_COMPLETION) { + /* Sleep a little to let things settle. */ + DELAY(100); + bzero(&msg, sizeof(msg)); + i = 0; + do { + rv = opal_call(OPAL_CHECK_ASYNC_COMPLETION, + vtophys(&msg), sizeof(msg), key); + /* Sleep for ~100us if necessary. */ + if (rv == OPAL_BUSY) + DELAY(100); + } while (rv == OPAL_BUSY && ++i < 10); + if (rv != OPAL_SUCCESS) + return (EIO); + val32 = msg.params[0]; + } + + if (rv != OPAL_SUCCESS) + return (EIO); + + *val = val32; + + return (0); +} + +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; + + SENSOR_LOCK(sc); + error = opal_sensor_get_val(sensor, &sensval); + SENSOR_UNLOCK(sc); + + 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, sc, sensor_id, + opal_sensor_sysctl, (sc->sc_type == OPAL_MSG_TYPE_MAX) ? "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_getprop(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, sc, sensor_id, + opal_sensor_sysctl, + (sc->sc_type == OPAL_MSG_TYPE_MAX) ? "IK" : "I", + "minimum value"); + } + + if (OF_getprop(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, sc, sensor_id, + opal_sensor_sysctl, + (sc->sc_type == OPAL_MSG_TYPE_MAX) ? "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), +}; + +static driver_t opal_sensor_driver = { + "opal_sensor", + opal_sensor_methods, + sizeof(struct opal_sensor_softc) +}; + +static devclass_t opal_sensor_devclass; + +DRIVER_MODULE(opal_sensor, opalsens, opal_sensor_driver, opal_sensor_devclass, + 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, -1); + 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); + } + + return (bus_generic_attach(dev)); +} + +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 +}; + +static devclass_t opalsens_devclass; + +DRIVER_MODULE(opalsens, opal, opalsens_driver, opalsens_devclass, NULL, NULL); _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
