1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright (c) 2003-2018, Intel Corporation. All rights reserved.
4 * Intel Management Engine Interface (Intel MEI) Linux driver
5 */
6
7 #ifndef _MEI_CLIENT_H_
8 #define _MEI_CLIENT_H_
9
10 #include <linux/types.h>
11 #include <linux/poll.h>
12 #include <linux/mei.h>
13
14 #include "mei_dev.h"
15
16 /*
17 * reference counting base function
18 */
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);
22
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);
25
26 struct mei_me_client *mei_me_cl_by_uuid(struct mei_device *dev,
27 const uuid_le *uuid);
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);
35
36 /**
37 * mei_me_cl_is_active - check whether me client is active in the fw
38 *
39 * @me_cl: me client
40 *
41 * Return: true if the me client is active in the firmware
42 */
mei_me_cl_is_active(const struct mei_me_client * me_cl)43 static inline bool mei_me_cl_is_active(const struct mei_me_client *me_cl)
44 {
45 return !list_empty_careful(&me_cl->list);
46 }
47
48 /**
49 * mei_me_cl_uuid - return me client protocol name (uuid)
50 *
51 * @me_cl: me client
52 *
53 * Return: me client protocol name
54 */
mei_me_cl_uuid(const struct mei_me_client * me_cl)55 static inline const uuid_le *mei_me_cl_uuid(const struct mei_me_client *me_cl)
56 {
57 return &me_cl->props.protocol_name;
58 }
59
60 /**
61 * mei_me_cl_ver - return me client protocol version
62 *
63 * @me_cl: me client
64 *
65 * Return: me client protocol version
66 */
mei_me_cl_ver(const struct mei_me_client * me_cl)67 static inline u8 mei_me_cl_ver(const struct mei_me_client *me_cl)
68 {
69 return me_cl->props.protocol_version;
70 }
71
72 /**
73 * mei_me_cl_max_conn - return me client max number of connections
74 *
75 * @me_cl: me client
76 *
77 * Return: me client max number of connections
78 */
mei_me_cl_max_conn(const struct mei_me_client * me_cl)79 static inline u8 mei_me_cl_max_conn(const struct mei_me_client *me_cl)
80 {
81 return me_cl->props.max_number_of_connections;
82 }
83
84 /**
85 * mei_me_cl_fixed - return me client fixed address, if any
86 *
87 * @me_cl: me client
88 *
89 * Return: me client fixed address
90 */
mei_me_cl_fixed(const struct mei_me_client * me_cl)91 static inline u8 mei_me_cl_fixed(const struct mei_me_client *me_cl)
92 {
93 return me_cl->props.fixed_address;
94 }
95
96 /**
97 * mei_me_cl_vt - return me client vtag supported status
98 *
99 * @me_cl: me client
100 *
101 * Return: true if me client supports vt tagging
102 */
mei_me_cl_vt(const struct mei_me_client * me_cl)103 static inline bool mei_me_cl_vt(const struct mei_me_client *me_cl)
104 {
105 return me_cl->props.vt_supported == 1;
106 }
107
108 /**
109 * mei_me_cl_max_len - return me client max msg length
110 *
111 * @me_cl: me client
112 *
113 * Return: me client max msg length
114 */
mei_me_cl_max_len(const struct mei_me_client * me_cl)115 static inline u32 mei_me_cl_max_len(const struct mei_me_client *me_cl)
116 {
117 return me_cl->props.max_msg_length;
118 }
119
120 /*
121 * MEI IO Functions
122 */
123 void mei_io_cb_free(struct mei_cl_cb *priv_cb);
124
125 /*
126 * MEI Host Client Functions
127 */
128
129 struct mei_cl *mei_cl_allocate(struct mei_device *dev);
130
131 int mei_cl_link(struct mei_cl *cl);
132 int mei_cl_unlink(struct mei_cl *cl);
133
134 struct mei_cl *mei_cl_alloc_linked(struct mei_device *dev);
135
136 struct mei_cl_cb *mei_cl_read_cb(struct mei_cl *cl, const struct file *fp);
137
138 void mei_cl_add_rd_completed(struct mei_cl *cl, struct mei_cl_cb *cb);
139 void mei_cl_del_rd_completed(struct mei_cl *cl, struct mei_cl_cb *cb);
140
141 struct mei_cl_cb *mei_cl_alloc_cb(struct mei_cl *cl, size_t length,
142 enum mei_cb_file_ops type,
143 const struct file *fp);
144 struct mei_cl_cb *mei_cl_enqueue_ctrl_wr_cb(struct mei_cl *cl, size_t length,
145 enum mei_cb_file_ops type,
146 const struct file *fp);
147 int mei_cl_flush_queues(struct mei_cl *cl, const struct file *fp);
148
149 struct mei_cl_vtag *mei_cl_vtag_alloc(struct file *fp, u8 vtag);
150 const struct file *mei_cl_fp_by_vtag(const struct mei_cl *cl, u8 vtag);
151 int mei_cl_vt_support_check(const struct mei_cl *cl);
152 /*
153 * MEI input output function prototype
154 */
155
156 /**
157 * mei_cl_is_connected - host client is connected
158 *
159 * @cl: host client
160 *
161 * Return: true if the host client is connected
162 */
mei_cl_is_connected(struct mei_cl * cl)163 static inline bool mei_cl_is_connected(struct mei_cl *cl)
164 {
165 return cl->state == MEI_FILE_CONNECTED;
166 }
167
168 /**
169 * mei_cl_me_id - me client id
170 *
171 * @cl: host client
172 *
173 * Return: me client id or 0 if client is not connected
174 */
mei_cl_me_id(const struct mei_cl * cl)175 static inline u8 mei_cl_me_id(const struct mei_cl *cl)
176 {
177 return cl->me_cl ? cl->me_cl->client_id : 0;
178 }
179
180 /**
181 * mei_cl_mtu - maximal message that client can send and receive
182 *
183 * @cl: host client
184 *
185 * Return: mtu or 0 if client is not connected
186 */
mei_cl_mtu(const struct mei_cl * cl)187 static inline size_t mei_cl_mtu(const struct mei_cl *cl)
188 {
189 return cl->me_cl ? cl->me_cl->props.max_msg_length : 0;
190 }
191
192 /**
193 * mei_cl_is_fixed_address - check whether the me client uses fixed address
194 *
195 * @cl: host client
196 *
197 * Return: true if the client is connected and it has fixed me address
198 */
mei_cl_is_fixed_address(const struct mei_cl * cl)199 static inline bool mei_cl_is_fixed_address(const struct mei_cl *cl)
200 {
201 return cl->me_cl && cl->me_cl->props.fixed_address;
202 }
203
204 /**
205 * mei_cl_is_single_recv_buf- check whether the me client
206 * uses single receiving buffer
207 *
208 * @cl: host client
209 *
210 * Return: true if single_recv_buf == 1; 0 otherwise
211 */
mei_cl_is_single_recv_buf(const struct mei_cl * cl)212 static inline bool mei_cl_is_single_recv_buf(const struct mei_cl *cl)
213 {
214 return cl->me_cl->props.single_recv_buf;
215 }
216
217 /**
218 * mei_cl_uuid - client's uuid
219 *
220 * @cl: host client
221 *
222 * Return: return uuid of connected me client
223 */
mei_cl_uuid(const struct mei_cl * cl)224 static inline const uuid_le *mei_cl_uuid(const struct mei_cl *cl)
225 {
226 return mei_me_cl_uuid(cl->me_cl);
227 }
228
229 /**
230 * mei_cl_host_addr - client's host address
231 *
232 * @cl: host client
233 *
234 * Return: 0 for fixed address client, host address for dynamic client
235 */
mei_cl_host_addr(const struct mei_cl * cl)236 static inline u8 mei_cl_host_addr(const struct mei_cl *cl)
237 {
238 return mei_cl_is_fixed_address(cl) ? 0 : cl->host_client_id;
239 }
240
241 int mei_cl_disconnect(struct mei_cl *cl);
242 int mei_cl_irq_disconnect(struct mei_cl *cl, struct mei_cl_cb *cb,
243 struct list_head *cmpl_list);
244 int mei_cl_connect(struct mei_cl *cl, struct mei_me_client *me_cl,
245 const struct file *file);
246 int mei_cl_irq_connect(struct mei_cl *cl, struct mei_cl_cb *cb,
247 struct list_head *cmpl_list);
248 int mei_cl_read_start(struct mei_cl *cl, size_t length, const struct file *fp);
249 ssize_t mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb);
250 int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb,
251 struct list_head *cmpl_list);
252
253 void mei_cl_complete(struct mei_cl *cl, struct mei_cl_cb *cb);
254
255 void mei_host_client_init(struct mei_device *dev);
256
257 u8 mei_cl_notify_fop2req(enum mei_cb_file_ops fop);
258 enum mei_cb_file_ops mei_cl_notify_req2fop(u8 request);
259 int mei_cl_notify_request(struct mei_cl *cl,
260 const struct file *file, u8 request);
261 int mei_cl_irq_notify(struct mei_cl *cl, struct mei_cl_cb *cb,
262 struct list_head *cmpl_list);
263 int mei_cl_notify_get(struct mei_cl *cl, bool block, bool *notify_ev);
264 void mei_cl_notify(struct mei_cl *cl);
265
266 void mei_cl_all_disconnect(struct mei_device *dev);
267
268 #define MEI_CL_FMT "cl:host=%02d me=%02d "
269 #define MEI_CL_PRM(cl) (cl)->host_client_id, mei_cl_me_id(cl)
270
271 #define cl_dbg(dev, cl, format, arg...) \
272 dev_dbg((dev)->dev, MEI_CL_FMT format, MEI_CL_PRM(cl), ##arg)
273
274 #define cl_warn(dev, cl, format, arg...) \
275 dev_warn((dev)->dev, MEI_CL_FMT format, MEI_CL_PRM(cl), ##arg)
276
277 #define cl_err(dev, cl, format, arg...) \
278 dev_err((dev)->dev, MEI_CL_FMT format, MEI_CL_PRM(cl), ##arg)
279
280 #endif /* _MEI_CLIENT_H_ */
281