drivers/misc/mei/client.h

   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_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  */
  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  */
  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  */
 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  */
 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  */
 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  */
 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  */
 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  */
 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  */
 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  */
 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  */
 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_ */