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ppc/pnv: add initial IPMI sensors for the BMC simulator

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Skiboot, the firmware for the PowerNV platform, expects the BMC to
provide some specific IPMI sensors. These sensors are exposed in the
device tree and their values are updated by the firmware at boot time.

Sensors of interest are :

	"FW Boot Progress"
	"Boot Count"

As such a device is defined on the command line, we can only detect
its presence at reset time.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Cédric Le Goater 2017-04-11 17:30:05 +02:00 • committed by David Gibson
parent 04f6c8b2c0
commit aeaef83dab
4 changed files with 112 additions and 1 deletions
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81
hw/ppc/pnv_bmc.c Normal file
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/*
* QEMU PowerNV, BMC related functions
*
* Copyright (c) 2016-2017, IBM Corporation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2, as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "hw/hw.h"
#include "sysemu/sysemu.h"
#include "target/ppc/cpu.h"
#include "qapi/error.h"
#include "qemu/log.h"
#include "hw/ipmi/ipmi.h"
#include "hw/ppc/fdt.h"
#include "hw/ppc/pnv.h"
#include <libfdt.h>
/* TODO: include definition in ipmi.h */
#define IPMI_SDR_FULL_TYPE 1
void pnv_bmc_populate_sensors(IPMIBmc *bmc, void *fdt)
{
int offset;
int i;
const struct ipmi_sdr_compact *sdr;
uint16_t nextrec;
offset = fdt_add_subnode(fdt, 0, "/bmc");
_FDT(offset);
_FDT((fdt_setprop_string(fdt, offset, "name", "bmc")));
_FDT((fdt_setprop_cell(fdt, offset, "#address-cells", 0x1)));
_FDT((fdt_setprop_cell(fdt, offset, "#size-cells", 0x0)));
offset = fdt_add_subnode(fdt, offset, "sensors");
_FDT(offset);
_FDT((fdt_setprop_cell(fdt, offset, "#address-cells", 0x1)));
_FDT((fdt_setprop_cell(fdt, offset, "#size-cells", 0x0)));
for (i = 0; !ipmi_bmc_sdr_find(bmc, i, &sdr, &nextrec); i++) {
int off;
char *name;
if (sdr->header.rec_type != IPMI_SDR_COMPACT_TYPE &&
sdr->header.rec_type != IPMI_SDR_FULL_TYPE) {
continue;
}
name = g_strdup_printf("sensor@%x", sdr->sensor_owner_number);
off = fdt_add_subnode(fdt, offset, name);
_FDT(off);
g_free(name);
_FDT((fdt_setprop_cell(fdt, off, "reg", sdr->sensor_owner_number)));
_FDT((fdt_setprop_string(fdt, off, "name", "sensor")));
_FDT((fdt_setprop_string(fdt, off, "compatible", "ibm,ipmi-sensor")));
_FDT((fdt_setprop_cell(fdt, off, "ipmi-sensor-reading-type",
sdr->reading_type)));
_FDT((fdt_setprop_cell(fdt, off, "ipmi-entity-id",
sdr->entity_id)));
_FDT((fdt_setprop_cell(fdt, off, "ipmi-entity-instance",
sdr->entity_instance)));
_FDT((fdt_setprop_cell(fdt, off, "ipmi-sensor-type",
sdr->sensor_type)));
}
}