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/* Copyright 2013-2014 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <device.h>
#include <ipmi.h>
#include <opal.h>
#include <skiboot.h>
#include <string.h>
#include <stdbool.h>
#define IPMI_WRITE_SENSOR (1 << 0)
#define FW_PROGRESS_SENSOR_TYPE 0x0F
#define BOOT_COUNT_SENSOR_TYPE 0xC3
static int16_t sensors[MAX_IPMI_SENSORS];
static bool sensors_present = false;
struct set_sensor_req {
u8 sensor_number;
u8 operation;
u8 sensor_reading;
u8 assertion_mask[2];
u8 deassertion_mask[2];
u8 event_data[3];
};
static bool ipmi_sensor_type_present(uint8_t sensor_type)
{
const struct dt_property *type_prop;
uint8_t type;
struct dt_node *node;
dt_for_each_compatible(dt_root, node, "ibm,ipmi-sensor") {
type_prop = dt_find_property(node, "ipmi-sensor-type");
if (!type_prop) {
prlog(PR_ERR, "IPMI: sensor doesn't have ipmi-sensor-type\n");
continue;
}
type = (uint8_t)dt_property_get_cell(type_prop, 0);
if (type == sensor_type)
return true;
}
return false;
}
uint8_t ipmi_get_sensor_number(uint8_t sensor_type)
{
assert(sensor_type < MAX_IPMI_SENSORS);
return sensors[sensor_type];
}
int ipmi_set_boot_count(void)
{
struct set_sensor_req req;
struct ipmi_msg *msg;
int boot_count_sensor;
if (!sensors_present)
return OPAL_UNSUPPORTED;
if (!ipmi_present())
return OPAL_CLOSED;
if (!ipmi_sensor_type_present(BOOT_COUNT_SENSOR_TYPE))
return OPAL_HARDWARE;
boot_count_sensor = sensors[BOOT_COUNT_SENSOR_TYPE];
if (boot_count_sensor < 0) {
prlog(PR_DEBUG, "IPMI: boot count set but not present\n");
return OPAL_HARDWARE;
}
memset(&req, 0, sizeof(req));
req.sensor_number = boot_count_sensor;
req.operation = IPMI_WRITE_SENSOR;
req.sensor_reading = 0x00;
req.assertion_mask[0] = 0x02;
msg = ipmi_mkmsg_simple(IPMI_SET_SENSOR_READING, &req, sizeof(req));
if (!msg)
return OPAL_HARDWARE;
printf("IPMI: Resetting boot count on successful boot\n");
return ipmi_queue_msg(msg);
}
int ipmi_set_fw_progress_sensor(uint8_t state)
{
struct ipmi_msg *msg;
struct set_sensor_req request;
int fw_sensor_num;
if (!sensors_present)
return OPAL_UNSUPPORTED;
if (!ipmi_present())
return OPAL_CLOSED;
if (!ipmi_sensor_type_present(FW_PROGRESS_SENSOR_TYPE))
return OPAL_HARDWARE;
fw_sensor_num = sensors[FW_PROGRESS_SENSOR_TYPE];
if (fw_sensor_num < 0) {
prlog(PR_DEBUG, "IPMI: fw progress set but not present\n");
return OPAL_HARDWARE;
}
memset(&request, 0, sizeof(request));
request.sensor_number = fw_sensor_num;
request.operation = 0xa0; /* Set event data bytes, assertion bits */
request.assertion_mask[0] = 0x04; /* Firmware progress offset */
request.event_data[0] = 0xc2;
request.event_data[1] = state;
prlog(PR_INFO, "IPMI: setting fw progress sensor %02x to %02x\n",
request.sensor_number, request.event_data[1]);
msg = ipmi_mkmsg_simple(IPMI_SET_SENSOR_READING, &request,
sizeof(request));
if (!msg)
return OPAL_HARDWARE;
return ipmi_queue_msg(msg);
}
void ipmi_sensor_init(void)
{
const struct dt_property *type_prop, *num_prop;
uint8_t num, type;
struct dt_node *n;
memset(sensors, -1, sizeof(sensors));
dt_for_each_compatible(dt_root, n, "ibm,ipmi-sensor") {
type_prop = dt_find_property(n, "ipmi-sensor-type");
if (!type_prop) {
prerror("IPMI: sensor doesn't have ipmi-sensor-type\n");
continue;
}
num_prop = dt_find_property(n, "reg");
if (!num_prop) {
prerror("IPMI: sensor doesn't have reg property\n");
continue;
}
num = (uint8_t)dt_property_get_cell(num_prop, 0);
type = (uint8_t)dt_property_get_cell(type_prop, 0);
assert(type < MAX_IPMI_SENSORS);
sensors[type] = num;
}
sensors_present = true;
}
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