1a59d1b8e0
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1334 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
139 lines
3.3 KiB
C
139 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* IBM ASM Service Processor Device Driver
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*
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* Copyright (C) IBM Corporation, 2004
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*
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* Author: Max Asböck <amax@us.ibm.com>
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*/
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#include "ibmasm.h"
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#include "dot_command.h"
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/**
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* Dispatch an incoming message to the specific handler for the message.
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* Called from interrupt context.
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*/
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void ibmasm_receive_message(struct service_processor *sp, void *message, int message_size)
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{
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u32 size;
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struct dot_command_header *header = (struct dot_command_header *)message;
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if (message_size == 0)
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return;
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size = get_dot_command_size(message);
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if (size == 0)
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return;
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if (size > message_size)
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size = message_size;
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switch (header->type) {
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case sp_event:
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ibmasm_receive_event(sp, message, size);
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break;
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case sp_command_response:
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ibmasm_receive_command_response(sp, message, size);
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break;
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case sp_heartbeat:
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ibmasm_receive_heartbeat(sp, message, size);
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break;
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default:
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dev_err(sp->dev, "Received unknown message from service processor\n");
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}
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}
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#define INIT_BUFFER_SIZE 32
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/**
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* send the 4.3.5.10 dot command (driver VPD) to the service processor
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*/
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int ibmasm_send_driver_vpd(struct service_processor *sp)
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{
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struct command *command;
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struct dot_command_header *header;
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u8 *vpd_command;
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u8 *vpd_data;
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int result = 0;
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command = ibmasm_new_command(sp, INIT_BUFFER_SIZE);
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if (command == NULL)
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return -ENOMEM;
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header = (struct dot_command_header *)command->buffer;
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header->type = sp_write;
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header->command_size = 4;
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header->data_size = 16;
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header->status = 0;
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header->reserved = 0;
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vpd_command = command->buffer + sizeof(struct dot_command_header);
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vpd_command[0] = 0x4;
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vpd_command[1] = 0x3;
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vpd_command[2] = 0x5;
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vpd_command[3] = 0xa;
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vpd_data = vpd_command + header->command_size;
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vpd_data[0] = 0;
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strcat(vpd_data, IBMASM_DRIVER_VPD);
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vpd_data[10] = 0;
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vpd_data[15] = 0;
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ibmasm_exec_command(sp, command);
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ibmasm_wait_for_response(command, IBMASM_CMD_TIMEOUT_NORMAL);
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if (command->status != IBMASM_CMD_COMPLETE)
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result = -ENODEV;
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command_put(command);
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return result;
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}
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struct os_state_command {
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struct dot_command_header header;
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unsigned char command[3];
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unsigned char data;
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};
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/**
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* send the 4.3.6 dot command (os state) to the service processor
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* During driver init this function is called with os state "up".
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* This causes the service processor to start sending heartbeats the
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* driver.
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* During driver exit the function is called with os state "down",
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* causing the service processor to stop the heartbeats.
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*/
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int ibmasm_send_os_state(struct service_processor *sp, int os_state)
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{
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struct command *cmd;
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struct os_state_command *os_state_cmd;
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int result = 0;
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cmd = ibmasm_new_command(sp, sizeof(struct os_state_command));
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if (cmd == NULL)
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return -ENOMEM;
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os_state_cmd = (struct os_state_command *)cmd->buffer;
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os_state_cmd->header.type = sp_write;
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os_state_cmd->header.command_size = 3;
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os_state_cmd->header.data_size = 1;
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os_state_cmd->header.status = 0;
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os_state_cmd->command[0] = 4;
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os_state_cmd->command[1] = 3;
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os_state_cmd->command[2] = 6;
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os_state_cmd->data = os_state;
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ibmasm_exec_command(sp, cmd);
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ibmasm_wait_for_response(cmd, IBMASM_CMD_TIMEOUT_NORMAL);
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if (cmd->status != IBMASM_CMD_COMPLETE)
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result = -ENODEV;
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command_put(cmd);
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return result;
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}
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