cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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dot_command.h (1588B)

      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2/*
      3 * IBM ASM Service Processor Device Driver
      4 *
      5 * Copyright (C) IBM Corporation, 2004
      6 *
      7 * Author: Max Asböck <amax@us.ibm.com>
      8 */
      9
     10#ifndef __DOT_COMMAND_H__
     11#define __DOT_COMMAND_H__
     12
     13/*
     14 * dot commands are the protocol used to communicate with the service
     15 * processor.
     16 * They consist of header, a command of variable length and data of
     17 * variable length.
     18 */
     19
     20/* dot command types */
     21#define sp_write		0
     22#define sp_write_next		1
     23#define sp_read			2
     24#define sp_read_next		3
     25#define sp_command_response	4
     26#define sp_event		5
     27#define sp_heartbeat		6
     28
     29#pragma pack(1)
     30struct dot_command_header {
     31	u8	type;
     32	u8	command_size;
     33	u16	data_size;
     34	u8	status;
     35	u8	reserved;
     36};
     37#pragma pack()
     38
     39static inline size_t get_dot_command_size(void *buffer)
     40{
     41	struct dot_command_header *cmd = (struct dot_command_header *)buffer;
     42	return sizeof(struct dot_command_header) + cmd->command_size + cmd->data_size;
     43}
     44
     45static inline unsigned int get_dot_command_timeout(void *buffer)
     46{
     47	struct dot_command_header *header = (struct dot_command_header *)buffer;
     48	unsigned char *cmd = buffer + sizeof(struct dot_command_header);
     49
     50	/* dot commands 6.3.1, 7.1 and 8.x need a longer timeout */
     51
     52	if (header->command_size == 3) {
     53		if ((cmd[0] == 6) && (cmd[1] == 3) && (cmd[2] == 1))
     54			return IBMASM_CMD_TIMEOUT_EXTRA;
     55	} else if (header->command_size == 2) {
     56		if ((cmd[0] == 7) && (cmd[1] == 1))
     57			return IBMASM_CMD_TIMEOUT_EXTRA;
     58		if (cmd[0] == 8)
     59			return IBMASM_CMD_TIMEOUT_EXTRA;
     60	}
     61	return IBMASM_CMD_TIMEOUT_NORMAL;
     62}
     63
     64#endif /* __DOT_COMMAND_H__ */