// SPDX-License-Identifier: GPL-2.0-or-later/* * IBM ASM Service Processor Device Driver * * Copyright (C) IBM Corporation, 2004 * * Author: Max Asböck <amax@us.ibm.com> */ #include "ibmasm.h"#include "dot_command.h" /* * Dispatch an incoming message to the specific handler for the message. * Called from interrupt context. */void ibmasm_receive_message(struct service_processor *sp, void *message, int message_size){	u32 size;	struct dot_command_header *header = (struct dot_command_header *)message; 	if (message_size == 0)		return; 	size = get_dot_command_size(message);	if (size == 0)		return; 	if (size > message_size)		size = message_size; 	switch (header->type) {	case sp_event:		ibmasm_receive_event(sp, message, size);		break;	case sp_command_response:		ibmasm_receive_command_response(sp, message, size);		break;	case sp_heartbeat:		ibmasm_receive_heartbeat(sp, message, size);		break;	default:		dev_err(sp->dev, "Received unknown message from service processor\n");	}}  #define INIT_BUFFER_SIZE 32  /* * send the 4.3.5.10 dot command (driver VPD) to the service processor */int ibmasm_send_driver_vpd(struct service_processor *sp){	struct command *command;	struct dot_command_header *header;	u8 *vpd_command;	u8 *vpd_data;	int result = 0; 	command = ibmasm_new_command(sp, INIT_BUFFER_SIZE);	if (command == NULL)		return -ENOMEM; 	header = (struct dot_command_header *)command->buffer;	header->type                = sp_write;	header->command_size        = 4;	header->data_size           = 16;	header->status              = 0;	header->reserved            = 0; 	vpd_command = command->buffer + sizeof(struct dot_command_header);	vpd_command[0] = 0x4;	vpd_command[1] = 0x3;	vpd_command[2] = 0x5;	vpd_command[3] = 0xa; 	vpd_data = vpd_command + header->command_size;	vpd_data[0] = 0;	strcat(vpd_data, IBMASM_DRIVER_VPD);	vpd_data[10] = 0;	vpd_data[15] = 0; 	ibmasm_exec_command(sp, command);	ibmasm_wait_for_response(command, IBMASM_CMD_TIMEOUT_NORMAL); 	if (command->status != IBMASM_CMD_COMPLETE)		result = -ENODEV; 	command_put(command); 	return result;} struct os_state_command {	struct dot_command_header	header;	unsigned char			command[3];	unsigned char			data;}; /* * send the 4.3.6 dot command (os state) to the service processor * During driver init this function is called with os state "up". * This causes the service processor to start sending heartbeats the * driver. * During driver exit the function is called with os state "down", * causing the service processor to stop the heartbeats. */int ibmasm_send_os_state(struct service_processor *sp, int os_state){	struct command *cmd;	struct os_state_command *os_state_cmd;	int result = 0; 	cmd = ibmasm_new_command(sp, sizeof(struct os_state_command));	if (cmd == NULL)		return -ENOMEM; 	os_state_cmd = (struct os_state_command *)cmd->buffer;	os_state_cmd->header.type		= sp_write;	os_state_cmd->header.command_size	= 3;	os_state_cmd->header.data_size		= 1;	os_state_cmd->header.status		= 0;	os_state_cmd->command[0]		= 4;	os_state_cmd->command[1]		= 3;	os_state_cmd->command[2]		= 6;	os_state_cmd->data			= os_state; 	ibmasm_exec_command(sp, cmd);	ibmasm_wait_for_response(cmd, IBMASM_CMD_TIMEOUT_NORMAL); 	if (cmd->status != IBMASM_CMD_COMPLETE)		result = -ENODEV; 	command_put(cmd);	return result;}