1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (c) 2003-2018, Intel Corporation. All rights reserved.
4 * Intel Management Engine Interface (Intel MEI) Linux driver
10 #include <linux/types.h>
11 #include <linux/poll.h>
12 #include <linux/mei.h>
17 * reference counting base function
19 void mei_me_cl_init(struct mei_me_client *me_cl);
20 void mei_me_cl_put(struct mei_me_client *me_cl);
21 struct mei_me_client *mei_me_cl_get(struct mei_me_client *me_cl);
23 void mei_me_cl_add(struct mei_device *dev, struct mei_me_client *me_cl);
24 void mei_me_cl_del(struct mei_device *dev, struct mei_me_client *me_cl);
26 struct mei_me_client *mei_me_cl_by_uuid(struct mei_device *dev,
28 struct mei_me_client *mei_me_cl_by_id(struct mei_device *dev, u8 client_id);
29 struct mei_me_client *mei_me_cl_by_uuid_id(struct mei_device *dev,
30 const uuid_le *uuid, u8 client_id);
31 void mei_me_cl_rm_by_uuid(struct mei_device *dev, const uuid_le *uuid);
32 void mei_me_cl_rm_by_uuid_id(struct mei_device *dev,
33 const uuid_le *uuid, u8 id);
34 void mei_me_cl_rm_all(struct mei_device *dev);
37 * mei_me_cl_is_active - check whether me client is active in the fw
41 * Return: true if the me client is active in the firmware
43 static inline bool mei_me_cl_is_active(const struct mei_me_client *me_cl)
45 return !list_empty_careful(&me_cl->list);
49 * mei_me_cl_uuid - return me client protocol name (uuid)
53 * Return: me client protocol name
55 static inline const uuid_le *mei_me_cl_uuid(const struct mei_me_client *me_cl)
57 return &me_cl->props.protocol_name;
61 * mei_me_cl_ver - return me client protocol version
65 * Return: me client protocol version
67 static inline u8 mei_me_cl_ver(const struct mei_me_client *me_cl)
69 return me_cl->props.protocol_version;
75 void mei_io_cb_free(struct mei_cl_cb *priv_cb);
78 * MEI Host Client Functions
81 struct mei_cl *mei_cl_allocate(struct mei_device *dev);
83 int mei_cl_link(struct mei_cl *cl);
84 int mei_cl_unlink(struct mei_cl *cl);
86 struct mei_cl *mei_cl_alloc_linked(struct mei_device *dev);
88 struct mei_cl_cb *mei_cl_read_cb(const struct mei_cl *cl,
89 const struct file *fp);
90 struct mei_cl_cb *mei_cl_alloc_cb(struct mei_cl *cl, size_t length,
91 enum mei_cb_file_ops type,
92 const struct file *fp);
93 struct mei_cl_cb *mei_cl_enqueue_ctrl_wr_cb(struct mei_cl *cl, size_t length,
94 enum mei_cb_file_ops type,
95 const struct file *fp);
96 int mei_cl_flush_queues(struct mei_cl *cl, const struct file *fp);
99 * MEI input output function prototype
103 * mei_cl_is_connected - host client is connected
107 * Return: true if the host client is connected
109 static inline bool mei_cl_is_connected(struct mei_cl *cl)
111 return cl->state == MEI_FILE_CONNECTED;
115 * mei_cl_me_id - me client id
119 * Return: me client id or 0 if client is not connected
121 static inline u8 mei_cl_me_id(const struct mei_cl *cl)
123 return cl->me_cl ? cl->me_cl->client_id : 0;
127 * mei_cl_mtu - maximal message that client can send and receive
133 static inline size_t mei_cl_mtu(const struct mei_cl *cl)
135 return cl->me_cl->props.max_msg_length;
139 * mei_cl_is_fixed_address - check whether the me client uses fixed address
143 * Return: true if the client is connected and it has fixed me address
145 static inline bool mei_cl_is_fixed_address(const struct mei_cl *cl)
147 return cl->me_cl && cl->me_cl->props.fixed_address;
151 * mei_cl_is_single_recv_buf- check whether the me client
152 * uses single receiving buffer
156 * Return: true if single_recv_buf == 1; 0 otherwise
158 static inline bool mei_cl_is_single_recv_buf(const struct mei_cl *cl)
160 return cl->me_cl->props.single_recv_buf;
164 * mei_cl_uuid - client's uuid
168 * Return: return uuid of connected me client
170 static inline const uuid_le *mei_cl_uuid(const struct mei_cl *cl)
172 return mei_me_cl_uuid(cl->me_cl);
176 * mei_cl_host_addr - client's host address
180 * Return: 0 for fixed address client, host address for dynamic client
182 static inline u8 mei_cl_host_addr(const struct mei_cl *cl)
184 return mei_cl_is_fixed_address(cl) ? 0 : cl->host_client_id;
187 int mei_cl_disconnect(struct mei_cl *cl);
188 int mei_cl_irq_disconnect(struct mei_cl *cl, struct mei_cl_cb *cb,
189 struct list_head *cmpl_list);
190 int mei_cl_connect(struct mei_cl *cl, struct mei_me_client *me_cl,
191 const struct file *file);
192 int mei_cl_irq_connect(struct mei_cl *cl, struct mei_cl_cb *cb,
193 struct list_head *cmpl_list);
194 int mei_cl_read_start(struct mei_cl *cl, size_t length, const struct file *fp);
195 ssize_t mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb);
196 int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb,
197 struct list_head *cmpl_list);
199 void mei_cl_complete(struct mei_cl *cl, struct mei_cl_cb *cb);
201 void mei_host_client_init(struct mei_device *dev);
203 u8 mei_cl_notify_fop2req(enum mei_cb_file_ops fop);
204 enum mei_cb_file_ops mei_cl_notify_req2fop(u8 request);
205 int mei_cl_notify_request(struct mei_cl *cl,
206 const struct file *file, u8 request);
207 int mei_cl_irq_notify(struct mei_cl *cl, struct mei_cl_cb *cb,
208 struct list_head *cmpl_list);
209 int mei_cl_notify_get(struct mei_cl *cl, bool block, bool *notify_ev);
210 void mei_cl_notify(struct mei_cl *cl);
212 void mei_cl_all_disconnect(struct mei_device *dev);
214 #define MEI_CL_FMT "cl:host=%02d me=%02d "
215 #define MEI_CL_PRM(cl) (cl)->host_client_id, mei_cl_me_id(cl)
217 #define cl_dbg(dev, cl, format, arg...) \
218 dev_dbg((dev)->dev, MEI_CL_FMT format, MEI_CL_PRM(cl), ##arg)
220 #define cl_warn(dev, cl, format, arg...) \
221 dev_warn((dev)->dev, MEI_CL_FMT format, MEI_CL_PRM(cl), ##arg)
223 #define cl_err(dev, cl, format, arg...) \
224 dev_err((dev)->dev, MEI_CL_FMT format, MEI_CL_PRM(cl), ##arg)
226 #endif /* _MEI_CLIENT_H_ */