tjh.dev
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1/*
2 *
3 * Intel Management Engine Interface (Intel MEI) Linux driver
4 * Copyright (c) 2003-2012, Intel Corporation.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 *
15 */
16
17#ifndef _MEI_CLIENT_H_
18#define _MEI_CLIENT_H_
19
20#include <linux/types.h>
21#include <linux/watchdog.h>
22#include <linux/poll.h>
23#include <linux/mei.h>
24
25#include "mei_dev.h"
26
27int mei_me_cl_by_uuid(const struct mei_device *dev, const uuid_le *cuuid);
28int mei_me_cl_by_id(struct mei_device *dev, u8 client_id);
29
30/*
31 * MEI IO Functions
32 */
33struct mei_cl_cb *mei_io_cb_init(struct mei_cl *cl, struct file *fp);
34void mei_io_cb_free(struct mei_cl_cb *priv_cb);
35int mei_io_cb_alloc_req_buf(struct mei_cl_cb *cb, size_t length);
36int mei_io_cb_alloc_resp_buf(struct mei_cl_cb *cb, size_t length);
37
38
39/**
40 * mei_io_list_init - Sets up a queue list.
41 *
42 * @list: An instance cl callback structure
43 */
44static inline void mei_io_list_init(struct mei_cl_cb *list)
45{
46 INIT_LIST_HEAD(&list->list);
47}
48/*
49 * MEI Host Client Functions
50 */
51
52struct mei_cl *mei_cl_allocate(struct mei_device *dev);
53void mei_cl_init(struct mei_cl *cl, struct mei_device *dev);
54
55
56int mei_cl_link(struct mei_cl *cl, int id);
57int mei_cl_unlink(struct mei_cl *cl);
58
59int mei_cl_flush_queues(struct mei_cl *cl);
60struct mei_cl_cb *mei_cl_find_read_cb(struct mei_cl *cl);
61
62
63int mei_cl_flow_ctrl_creds(struct mei_cl *cl);
64
65int mei_cl_flow_ctrl_reduce(struct mei_cl *cl);
66/*
67 * MEI input output function prototype
68 */
69static inline bool mei_cl_is_connected(struct mei_cl *cl)
70{
71 return cl->dev &&
72 cl->dev->dev_state == MEI_DEV_ENABLED &&
73 cl->state == MEI_FILE_CONNECTED;
74}
75static inline bool mei_cl_is_transitioning(struct mei_cl *cl)
76{
77 return MEI_FILE_INITIALIZING == cl->state ||
78 MEI_FILE_DISCONNECTED == cl->state ||
79 MEI_FILE_DISCONNECTING == cl->state;
80}
81
82bool mei_cl_is_other_connecting(struct mei_cl *cl);
83int mei_cl_disconnect(struct mei_cl *cl);
84int mei_cl_connect(struct mei_cl *cl, struct file *file);
85int mei_cl_read_start(struct mei_cl *cl, size_t length);
86int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking);
87int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb,
88 struct mei_cl_cb *cmpl_list);
89
90void mei_cl_complete(struct mei_cl *cl, struct mei_cl_cb *cb);
91
92void mei_host_client_init(struct work_struct *work);
93
94
95
96void mei_cl_all_disconnect(struct mei_device *dev);
97void mei_cl_all_wakeup(struct mei_device *dev);
98void mei_cl_all_write_clear(struct mei_device *dev);
99
100#define MEI_CL_FMT "cl:host=%02d me=%02d "
101#define MEI_CL_PRM(cl) (cl)->host_client_id, (cl)->me_client_id
102
103#define cl_dbg(dev, cl, format, arg...) \
104 dev_dbg(&(dev)->pdev->dev, MEI_CL_FMT format, MEI_CL_PRM(cl), ##arg)
105
106#define cl_err(dev, cl, format, arg...) \
107 dev_err(&(dev)->pdev->dev, MEI_CL_FMT format, MEI_CL_PRM(cl), ##arg)
108
109#endif /* _MEI_CLIENT_H_ */