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dm:handle shutdown command from UOS

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it will send "acked" message to UOS if it receives
"shutdown" command from UOS, then wait UOS poweroff itself,
it will send shutdown to life_mngr running on SOS to
shutdown system.

Tracked-On: #4446
Signed-off-by: Mingqiang Chi <mingqiang.chi@intel.com>
Reviewed-by: Shuo A Liu <shuo.a.liu@intel.com>
Reviewed-by: Minggui Cao <minggui.cao@intel.com>
Reviewed-by: Yin Fengwei <fengwei.yin@intel.com>
Acked-by: Wang, Yu1 <yu1.wang@intel.com>
This commit is contained in:
Mingqiang Chi 2020-03-03 16:30:52 +08:00 committed by wenlingz
parent 4fdc2be129
commit 8733abef6b
1 changed files with 22 additions and 2 deletions
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24
devicemodel/core/pm_vuart.c
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@ -93,8 +93,28 @@ static void *pm_monitor_loop(void *arg)
while (1) { while (1) {
rc = read_bytes(node_fd, (uint8_t *)buf, CMD_LEN); rc = read_bytes(node_fd, (uint8_t *)buf, CMD_LEN);
switch (pm_monitor_state) { switch (pm_monitor_state) {
/* it can receive shutdown command from UOS for the following two states,
* it will change the state to SHUTDOWN_REQ_FROM_UOS if receive the shutdown
* command from UOS, this can prevent the follow-up shutdown command
* from UOS or SOS in this state.
* it will wait UOS poweroff itself and then send shutdown to
* life_mngr running on the SOS to shutdown system
*/
case SHUTDOWN_REQ_WAITING:
case SHUTDOWN_REQ_FROM_UOS:
if ((rc > 0) && (strncmp(SHUTDOWN_CMD, (const char *)buf, strlen(SHUTDOWN_CMD)) == 0)) {
pm_monitor_state = SHUTDOWN_REQ_FROM_UOS;
if (write(node_fd, SHUTDOWN_CMD_ACK, sizeof(SHUTDOWN_CMD_ACK))
!= sizeof(SHUTDOWN_CMD_ACK)) {
/* here no need to resend ack, it will resend shutdown cmd
* if uos can not receive acked message
*/
pr_err("send acked message to UOS failed!\n");
}
}
break;
/* Waiting acked message from UOS, this is triggered by SOS */ /* Waiting acked message from UOS, this is triggered by SOS */
case SHUTDOWN_ACK_WAITING: case SHUTDOWN_ACK_WAITING:
/* Once received the SHUTDOWN ACK from UOS, then wait UOS to set ACPI PM register to change /* Once received the SHUTDOWN ACK from UOS, then wait UOS to set ACPI PM register to change
@ -127,8 +147,8 @@ static void *pm_monitor_loop(void *arg)
pr_err("Invalid pm_monitor_state(0x%x)\r\n", pm_monitor_state); pr_err("Invalid pm_monitor_state(0x%x)\r\n", pm_monitor_state);
break; break;
} }
sleep(1); sleep(1);
} }
return NULL; return NULL;