drivers/ipmi: Add IPMI BMC FRB2 watchdog timer support
Add a function for initializing and starting FRB2 timer with the provided countdown and action values, and a stop function for stopping the timer. Tested on OCP Monolake. Change-Id: Ic91905e5f01b962473b6b3a9616266d2d95b1d6b Signed-off-by: Johnny Lin <johnny_lin@wiwynn.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/36179 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Rudolph <siro@das-labor.org>
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ramstage-$(CONFIG_IPMI_KCS) += ipmi_kcs.c
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ramstage-$(CONFIG_IPMI_KCS) += ipmi_kcs_ops.c
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ramstage-$(CONFIG_IPMI_KCS) += ipmi_ops.c
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/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2019 Wiwynn Corp.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; version 2 of
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* the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <console/console.h>
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#include "ipmi_ops.h"
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enum cb_err ipmi_init_and_start_bmc_wdt(const int port, uint16_t countdown,
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uint8_t action)
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{
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int ret;
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struct ipmi_wdt_req req = {0};
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struct ipmi_rsp rsp;
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printk(BIOS_INFO, "Initializing IPMI BMC watchdog timer\n");
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/* BIOS FRB2 */
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req.timer_use = 1;
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req.timer_actions = action;
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/* clear BIOS FRB2 expiration flag */
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req.timer_use_expiration_flags_clr = 2;
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req.initial_countdown_val = countdown;
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ret = ipmi_kcs_message(port, IPMI_NETFN_APPLICATION, 0x0,
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IPMI_BMC_SET_WDG_TIMER,
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(const unsigned char *) &req, sizeof(req),
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(unsigned char *) &rsp, sizeof(rsp));
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if (ret < sizeof(struct ipmi_rsp) || rsp.completion_code) {
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printk(BIOS_ERR, "IPMI: %s set wdt command failed "
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"(ret=%d resp=0x%x), failed to initialize and start "
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"IPMI BMC watchdog timer\n", __func__,
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ret, rsp.completion_code);
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return CB_ERR;
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}
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/* Reset command to start timer */
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ret = ipmi_kcs_message(port, IPMI_NETFN_APPLICATION, 0x0,
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IPMI_BMC_RESET_WDG_TIMER, NULL, 0,
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(unsigned char *) &rsp, sizeof(rsp));
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if (ret < sizeof(struct ipmi_rsp) || rsp.completion_code) {
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printk(BIOS_ERR, "IPMI: %s reset wdt command failed "
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"(ret=%d resp=0x%x), failed to initialize and start "
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"IPMI BMC watchdog timer\n", __func__,
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ret, rsp.completion_code);
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return CB_ERR;
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}
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printk(BIOS_INFO, "IPMI BMC watchdog initialized and started.\n");
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return CB_SUCCESS;
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}
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enum cb_err ipmi_stop_bmc_wdt(const int port)
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{
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int ret;
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struct ipmi_wdt_req req;
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struct ipmi_wdt_rsp rsp = {0};
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struct ipmi_rsp resp;
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/* Get current timer first */
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ret = ipmi_kcs_message(port, IPMI_NETFN_APPLICATION, 0x0,
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IPMI_BMC_GET_WDG_TIMER, NULL, 0,
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(unsigned char *) &rsp, sizeof(rsp));
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if (ret < sizeof(struct ipmi_rsp) || rsp.resp.completion_code) {
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printk(BIOS_ERR, "IPMI: %s get wdt command failed "
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"(ret=%d resp=0x%x), IPMI BMC watchdog timer may still "
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"be running\n", __func__, ret,
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rsp.resp.completion_code);
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return CB_ERR;
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}
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/* If bit 6 in timer_use is 0 then it's already stopped. */
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if (!(rsp.data.timer_use & (1 << 6))) {
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printk(BIOS_DEBUG, "IPMI BMC watchdog is already stopped\n");
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return CB_SUCCESS;
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}
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/* Set timer stop running by clearing bit 6. */
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rsp.data.timer_use &= ~(1 << 6);
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rsp.data.initial_countdown_val = 0;
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req = rsp.data;
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ret = ipmi_kcs_message(port, IPMI_NETFN_APPLICATION, 0x0,
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IPMI_BMC_SET_WDG_TIMER,
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(const unsigned char *) &req, sizeof(req),
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(unsigned char *) &resp, sizeof(resp));
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if (ret < sizeof(struct ipmi_rsp) || resp.completion_code) {
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printk(BIOS_ERR, "IPMI: %s set wdt command stop timer failed "
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"(ret=%d resp=0x%x), failed to stop IPMI "
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"BMC watchdog timer\n", __func__, ret,
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resp.completion_code);
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return CB_ERR;
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}
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printk(BIOS_DEBUG, "IPMI BMC watchdog is stopped\n");
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return CB_SUCCESS;
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}
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#ifndef __IPMI_OPS_H
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#define __IPMI_OPS_H
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/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2019 Wiwynn Corp.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; version 2 of
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* the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <types.h>
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#include "ipmi_kcs.h"
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#define IPMI_BMC_RESET_WDG_TIMER 0x22
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#define IPMI_BMC_SET_WDG_TIMER 0x24
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#define IPMI_BMC_GET_WDG_TIMER 0x25
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/* BMC watchdog timeout action */
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enum ipmi_bmc_timeout_action_type {
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TIMEOUT_NO_ACTION = 0x00,
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TIMEOUT_HARD_RESET = 0x01,
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TIMEOUT_POWER_DOWN = 0x02,
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TIMEOUT_POWER_CYCLE = 0x03,
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};
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/* BMC Watchdog timer */
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struct ipmi_wdt_req {
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uint8_t timer_use;
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uint8_t timer_actions;
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uint8_t pretimeout_interval;
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uint8_t timer_use_expiration_flags_clr;
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uint16_t initial_countdown_val;
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} __packed;
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struct ipmi_wdt_rsp {
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struct ipmi_rsp resp;
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struct ipmi_wdt_req data;
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uint16_t present_countdown_val;
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} __packed;
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/*
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* Initialize and start BMC FRB2 watchdog timer with the
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* provided timer countdown and action values.
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* Returns CB_SUCCESS on success and CB_ERR if an error occurred
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*/
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enum cb_err ipmi_init_and_start_bmc_wdt(const int port, uint16_t countdown,
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uint8_t action);
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/* Returns CB_SUCCESS on success and CB_ERR if an error occurred */
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enum cb_err ipmi_stop_bmc_wdt(const int port);
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#endif
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