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AMTHIF has special support in the mei drive, it handles multiplexing multiple user space connection above single me client connection. Since there is no additional addressing information there is a strict requirement on the traffic order on each connection and on the "read after write" order within the connection. This creates a lot of complexity mostly because the other client types do not necessarily fall under the same restriction. After carefully studying the use of the AMTHIF client, we came to conclusion that the multiplexing is not really utilized by any application and we may safely remove that support and significantly simplify the driver. Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
236 lines
6.4 KiB
C
236 lines
6.4 KiB
C
/*
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*
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* Intel Management Engine Interface (Intel MEI) Linux driver
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* Copyright (c) 2003-2012, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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*/
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#ifndef _MEI_CLIENT_H_
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#define _MEI_CLIENT_H_
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#include <linux/types.h>
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#include <linux/poll.h>
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#include <linux/mei.h>
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#include "mei_dev.h"
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/*
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* reference counting base function
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*/
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void mei_me_cl_init(struct mei_me_client *me_cl);
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void mei_me_cl_put(struct mei_me_client *me_cl);
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struct mei_me_client *mei_me_cl_get(struct mei_me_client *me_cl);
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void mei_me_cl_add(struct mei_device *dev, struct mei_me_client *me_cl);
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void mei_me_cl_del(struct mei_device *dev, struct mei_me_client *me_cl);
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struct mei_me_client *mei_me_cl_by_uuid(struct mei_device *dev,
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const uuid_le *uuid);
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struct mei_me_client *mei_me_cl_by_id(struct mei_device *dev, u8 client_id);
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struct mei_me_client *mei_me_cl_by_uuid_id(struct mei_device *dev,
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const uuid_le *uuid, u8 client_id);
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void mei_me_cl_rm_by_uuid(struct mei_device *dev, const uuid_le *uuid);
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void mei_me_cl_rm_by_uuid_id(struct mei_device *dev,
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const uuid_le *uuid, u8 id);
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void mei_me_cl_rm_all(struct mei_device *dev);
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/**
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* mei_me_cl_is_active - check whether me client is active in the fw
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*
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* @me_cl: me client
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*
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* Return: true if the me client is active in the firmware
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*/
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static inline bool mei_me_cl_is_active(const struct mei_me_client *me_cl)
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{
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return !list_empty_careful(&me_cl->list);
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}
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/**
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* mei_me_cl_uuid - return me client protocol name (uuid)
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*
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* @me_cl: me client
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*
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* Return: me client protocol name
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*/
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static inline const uuid_le *mei_me_cl_uuid(const struct mei_me_client *me_cl)
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{
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return &me_cl->props.protocol_name;
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}
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/**
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* mei_me_cl_ver - return me client protocol version
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*
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* @me_cl: me client
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*
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* Return: me client protocol version
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*/
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static inline u8 mei_me_cl_ver(const struct mei_me_client *me_cl)
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{
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return me_cl->props.protocol_version;
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}
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/*
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* MEI IO Functions
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*/
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void mei_io_cb_free(struct mei_cl_cb *priv_cb);
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/*
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* MEI Host Client Functions
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*/
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struct mei_cl *mei_cl_allocate(struct mei_device *dev);
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int mei_cl_link(struct mei_cl *cl);
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int mei_cl_unlink(struct mei_cl *cl);
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struct mei_cl *mei_cl_alloc_linked(struct mei_device *dev);
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struct mei_cl_cb *mei_cl_read_cb(const struct mei_cl *cl,
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const struct file *fp);
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struct mei_cl_cb *mei_cl_alloc_cb(struct mei_cl *cl, size_t length,
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enum mei_cb_file_ops type,
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const struct file *fp);
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struct mei_cl_cb *mei_cl_enqueue_ctrl_wr_cb(struct mei_cl *cl, size_t length,
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enum mei_cb_file_ops type,
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const struct file *fp);
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int mei_cl_flush_queues(struct mei_cl *cl, const struct file *fp);
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/*
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* MEI input output function prototype
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*/
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/**
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* mei_cl_is_connected - host client is connected
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*
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* @cl: host client
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*
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* Return: true if the host client is connected
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*/
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static inline bool mei_cl_is_connected(struct mei_cl *cl)
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{
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return cl->state == MEI_FILE_CONNECTED;
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}
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/**
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* mei_cl_me_id - me client id
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*
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* @cl: host client
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*
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* Return: me client id or 0 if client is not connected
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*/
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static inline u8 mei_cl_me_id(const struct mei_cl *cl)
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{
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return cl->me_cl ? cl->me_cl->client_id : 0;
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}
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/**
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* mei_cl_mtu - maximal message that client can send and receive
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*
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* @cl: host client
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*
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* Return: mtu
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*/
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static inline size_t mei_cl_mtu(const struct mei_cl *cl)
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{
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return cl->me_cl->props.max_msg_length;
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}
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/**
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* mei_cl_is_fixed_address - check whether the me client uses fixed address
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*
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* @cl: host client
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*
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* Return: true if the client is connected and it has fixed me address
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*/
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static inline bool mei_cl_is_fixed_address(const struct mei_cl *cl)
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{
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return cl->me_cl && cl->me_cl->props.fixed_address;
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}
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/**
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* mei_cl_is_single_recv_buf- check whether the me client
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* uses single receiving buffer
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*
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* @cl: host client
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*
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* Return: true if single_recv_buf == 1; 0 otherwise
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*/
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static inline bool mei_cl_is_single_recv_buf(const struct mei_cl *cl)
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{
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return cl->me_cl->props.single_recv_buf;
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}
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/**
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* mei_cl_uuid - client's uuid
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*
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* @cl: host client
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*
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* Return: return uuid of connected me client
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*/
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static inline const uuid_le *mei_cl_uuid(const struct mei_cl *cl)
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{
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return mei_me_cl_uuid(cl->me_cl);
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}
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/**
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* mei_cl_host_addr - client's host address
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*
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* @cl: host client
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*
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* Return: 0 for fixed address client, host address for dynamic client
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*/
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static inline u8 mei_cl_host_addr(const struct mei_cl *cl)
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{
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return mei_cl_is_fixed_address(cl) ? 0 : cl->host_client_id;
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}
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int mei_cl_disconnect(struct mei_cl *cl);
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int mei_cl_irq_disconnect(struct mei_cl *cl, struct mei_cl_cb *cb,
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struct list_head *cmpl_list);
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int mei_cl_connect(struct mei_cl *cl, struct mei_me_client *me_cl,
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const struct file *file);
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int mei_cl_irq_connect(struct mei_cl *cl, struct mei_cl_cb *cb,
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struct list_head *cmpl_list);
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int mei_cl_read_start(struct mei_cl *cl, size_t length, const struct file *fp);
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int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb);
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int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb,
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struct list_head *cmpl_list);
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void mei_cl_complete(struct mei_cl *cl, struct mei_cl_cb *cb);
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void mei_host_client_init(struct mei_device *dev);
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u8 mei_cl_notify_fop2req(enum mei_cb_file_ops fop);
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enum mei_cb_file_ops mei_cl_notify_req2fop(u8 request);
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int mei_cl_notify_request(struct mei_cl *cl,
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const struct file *file, u8 request);
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int mei_cl_irq_notify(struct mei_cl *cl, struct mei_cl_cb *cb,
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struct list_head *cmpl_list);
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int mei_cl_notify_get(struct mei_cl *cl, bool block, bool *notify_ev);
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void mei_cl_notify(struct mei_cl *cl);
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void mei_cl_all_disconnect(struct mei_device *dev);
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#define MEI_CL_FMT "cl:host=%02d me=%02d "
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#define MEI_CL_PRM(cl) (cl)->host_client_id, mei_cl_me_id(cl)
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#define cl_dbg(dev, cl, format, arg...) \
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dev_dbg((dev)->dev, MEI_CL_FMT format, MEI_CL_PRM(cl), ##arg)
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#define cl_warn(dev, cl, format, arg...) \
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dev_warn((dev)->dev, MEI_CL_FMT format, MEI_CL_PRM(cl), ##arg)
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#define cl_err(dev, cl, format, arg...) \
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dev_err((dev)->dev, MEI_CL_FMT format, MEI_CL_PRM(cl), ##arg)
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#endif /* _MEI_CLIENT_H_ */
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