mirror of
https://github.com/torvalds/linux.git
synced 2024-11-08 21:21:47 +00:00
d36b691077
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
153 lines
4.0 KiB
C
153 lines
4.0 KiB
C
/*
|
|
* IBM ASM Service Processor Device Driver
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* 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, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*
|
|
* 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;
|
|
}
|