xref: /linux/drivers/misc/mei/client.h (revision 83f47eea)
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(const struct mei_cl * cl)163 static inline bool mei_cl_is_connected(const 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, unsigned long timeout);
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 int mei_cl_irq_dma_map(struct mei_cl *cl, struct mei_cl_cb *cb,
269 		       struct list_head *cmpl_list);
270 int mei_cl_irq_dma_unmap(struct mei_cl *cl, struct mei_cl_cb *cb,
271 			 struct list_head *cmpl_list);
272 int mei_cl_dma_alloc_and_map(struct mei_cl *cl, const struct file *fp,
273 			     u8 buffer_id, size_t size);
274 int mei_cl_dma_unmap(struct mei_cl *cl, const struct file *fp);
275 
276 #define MEI_CL_FMT "cl:host=%02d me=%02d "
277 #define MEI_CL_PRM(cl) (cl)->host_client_id, mei_cl_me_id(cl)
278 
279 #define cl_dbg(dev, cl, format, arg...) \
280 	dev_dbg((dev)->dev, MEI_CL_FMT format, MEI_CL_PRM(cl), ##arg)
281 
282 #define cl_warn(dev, cl, format, arg...) \
283 	dev_warn((dev)->dev, MEI_CL_FMT format, MEI_CL_PRM(cl), ##arg)
284 
285 #define cl_err(dev, cl, format, arg...) \
286 	dev_err((dev)->dev, MEI_CL_FMT format, MEI_CL_PRM(cl), ##arg)
287 
288 #endif /* _MEI_CLIENT_H_ */
289