root/drivers/misc/mei/client.h

INCLUDED FROM

DEFINITIONS

1. mei_me_cl_is_active
2. mei_me_cl_uuid
3. mei_me_cl_ver
4. mei_cl_is_connected
5. mei_cl_me_id
6. mei_cl_mtu
7. mei_cl_is_fixed_address
8. mei_cl_is_single_recv_buf
9. mei_cl_uuid
10. mei_cl_host_addr

   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  */
  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  */
  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  */
  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 IO Functions
  74  */
  75 void mei_io_cb_free(struct mei_cl_cb *priv_cb);
  76 
  77 /*
  78  * MEI Host Client Functions
  79  */
  80 
  81 struct mei_cl *mei_cl_allocate(struct mei_device *dev);
  82 
  83 int mei_cl_link(struct mei_cl *cl);
  84 int mei_cl_unlink(struct mei_cl *cl);
  85 
  86 struct mei_cl *mei_cl_alloc_linked(struct mei_device *dev);
  87 
  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);
  97 
  98 /*
  99  *  MEI input output function prototype
 100  */
 101 
 102 /**
 103  * mei_cl_is_connected - host client is connected
 104  *
 105  * @cl: host client
 106  *
 107  * Return: true if the host client is connected
 108  */
 109 static inline bool mei_cl_is_connected(struct mei_cl *cl)
 110 {
 111         return  cl->state == MEI_FILE_CONNECTED;
 112 }
 113 
 114 /**
 115  * mei_cl_me_id - me client id
 116  *
 117  * @cl: host client
 118  *
 119  * Return: me client id or 0 if client is not connected
 120  */
 121 static inline u8 mei_cl_me_id(const struct mei_cl *cl)
 122 {
 123         return cl->me_cl ? cl->me_cl->client_id : 0;
 124 }
 125 
 126 /**
 127  * mei_cl_mtu - maximal message that client can send and receive
 128  *
 129  * @cl: host client
 130  *
 131  * Return: mtu
 132  */
 133 static inline size_t mei_cl_mtu(const struct mei_cl *cl)
 134 {
 135         return cl->me_cl->props.max_msg_length;
 136 }
 137 
 138 /**
 139  * mei_cl_is_fixed_address - check whether the me client uses fixed address
 140  *
 141  * @cl: host client
 142  *
 143  * Return: true if the client is connected and it has fixed me address
 144  */
 145 static inline bool mei_cl_is_fixed_address(const struct mei_cl *cl)
 146 {
 147         return cl->me_cl && cl->me_cl->props.fixed_address;
 148 }
 149 
 150 /**
 151  * mei_cl_is_single_recv_buf- check whether the me client
 152  *       uses single receiving buffer
 153  *
 154  * @cl: host client
 155  *
 156  * Return: true if single_recv_buf == 1; 0 otherwise
 157  */
 158 static inline bool mei_cl_is_single_recv_buf(const struct mei_cl *cl)
 159 {
 160         return cl->me_cl->props.single_recv_buf;
 161 }
 162 
 163 /**
 164  * mei_cl_uuid -  client's uuid
 165  *
 166  * @cl: host client
 167  *
 168  * Return: return uuid of connected me client
 169  */
 170 static inline const uuid_le *mei_cl_uuid(const struct mei_cl *cl)
 171 {
 172         return mei_me_cl_uuid(cl->me_cl);
 173 }
 174 
 175 /**
 176  * mei_cl_host_addr - client's host address
 177  *
 178  * @cl: host client
 179  *
 180  * Return: 0 for fixed address client, host address for dynamic client
 181  */
 182 static inline u8 mei_cl_host_addr(const struct mei_cl *cl)
 183 {
 184         return  mei_cl_is_fixed_address(cl) ? 0 : cl->host_client_id;
 185 }
 186 
 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);
 198 
 199 void mei_cl_complete(struct mei_cl *cl, struct mei_cl_cb *cb);
 200 
 201 void mei_host_client_init(struct mei_device *dev);
 202 
 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);
 211 
 212 void mei_cl_all_disconnect(struct mei_device *dev);
 213 
 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)
 216 
 217 #define cl_dbg(dev, cl, format, arg...) \
 218         dev_dbg((dev)->dev, MEI_CL_FMT format, MEI_CL_PRM(cl), ##arg)
 219 
 220 #define cl_warn(dev, cl, format, arg...) \
 221         dev_warn((dev)->dev, MEI_CL_FMT format, MEI_CL_PRM(cl), ##arg)
 222 
 223 #define cl_err(dev, cl, format, arg...) \
 224         dev_err((dev)->dev, MEI_CL_FMT format, MEI_CL_PRM(cl), ##arg)
 225 
 226 #endif /* _MEI_CLIENT_H_ */