drivers/misc/mei/client.h

   1 /*
   2  *
   3  * Intel Management Engine Interface (Intel MEI) Linux driver
   4  * Copyright (c) 2003-2012, Intel Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms and conditions of the GNU General Public License,
   8  * version 2, as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  */
  16
  17 #ifndef _MEI_CLIENT_H_
  18 #define _MEI_CLIENT_H_
  19
  20 #include <linux/types.h>
  21 #include <linux/watchdog.h>
  22 #include <linux/poll.h>
  23 #include <linux/mei.h>
  24
  25 #include "mei_dev.h"
  26
  27 /*
  28  * reference counting base function
  29  */
  30 void mei_me_cl_init(struct mei_me_client *me_cl);
  31 void mei_me_cl_put(struct mei_me_client *me_cl);
  32 struct mei_me_client *mei_me_cl_get(struct mei_me_client *me_cl);
  33
  34 void mei_me_cl_add(struct mei_device *dev, struct mei_me_client *me_cl);
  35 void mei_me_cl_del(struct mei_device *dev, struct mei_me_client *me_cl);
  36
  37 struct mei_me_client *mei_me_cl_by_uuid(struct mei_device *dev,
  38                                         const uuid_le *uuid);
  39 struct mei_me_client *mei_me_cl_by_id(struct mei_device *dev, u8 client_id);
  40 struct mei_me_client *mei_me_cl_by_uuid_id(struct mei_device *dev,
  41                                            const uuid_le *uuid, u8 client_id);
  42 void mei_me_cl_rm_by_uuid(struct mei_device *dev, const uuid_le *uuid);
  43 void mei_me_cl_rm_by_uuid_id(struct mei_device *dev,
  44                              const uuid_le *uuid, u8 id);
  45 void mei_me_cl_rm_all(struct mei_device *dev);
  46
  47 /**
  48  * mei_me_cl_is_active - check whether me client is active in the fw
  49  *
  50  * @me_cl: me client
  51  *
  52  * Return: true if the me client is active in the firmware
  53  */
  54 static inline bool mei_me_cl_is_active(const struct mei_me_client *me_cl)
  55 {
  56         return !list_empty_careful(&me_cl->list);
  57 }
  58
  59 /**
  60  * mei_me_cl_uuid - return me client protocol name (uuid)
  61  *
  62  * @me_cl: me client
  63  *
  64  * Return: me client protocol name
  65  */
  66 static inline const uuid_le *mei_me_cl_uuid(const struct mei_me_client *me_cl)
  67 {
  68         return &me_cl->props.protocol_name;
  69 }
  70
  71 /*
  72  * MEI IO Functions
  73  */
  74 struct mei_cl_cb *mei_io_cb_init(struct mei_cl *cl, enum mei_cb_file_ops type,
  75                                  struct file *fp);
  76 void mei_io_cb_free(struct mei_cl_cb *priv_cb);
  77 int mei_io_cb_alloc_buf(struct mei_cl_cb *cb, size_t length);
  78
  79
  80 /**
  81  * mei_io_list_init - Sets up a queue list.
  82  *
  83  * @list: An instance cl callback structure
  84  */
  85 static inline void mei_io_list_init(struct mei_cl_cb *list)
  86 {
  87         INIT_LIST_HEAD(&list->list);
  88 }
  89 void mei_io_list_flush(struct mei_cl_cb *list, struct mei_cl *cl);
  90
  91 /*
  92  * MEI Host Client Functions
  93  */
  94
  95 struct mei_cl *mei_cl_allocate(struct mei_device *dev);
  96 void mei_cl_init(struct mei_cl *cl, struct mei_device *dev);
  97
  98
  99 int mei_cl_link(struct mei_cl *cl, int id);
 100 int mei_cl_unlink(struct mei_cl *cl);
 101
 102 struct mei_cl *mei_cl_alloc_linked(struct mei_device *dev, int id);
 103
 104 struct mei_cl_cb *mei_cl_read_cb(const struct mei_cl *cl,
 105                                  const struct file *fp);
 106 void mei_cl_read_cb_flush(const struct mei_cl *cl, const struct file *fp);
 107 struct mei_cl_cb *mei_cl_alloc_cb(struct mei_cl *cl, size_t length,
 108                                   enum mei_cb_file_ops type, struct file *fp);
 109 int mei_cl_flush_queues(struct mei_cl *cl, const struct file *fp);
 110
 111 int mei_cl_flow_ctrl_creds(struct mei_cl *cl);
 112
 113 int mei_cl_flow_ctrl_reduce(struct mei_cl *cl);
 114 /*
 115  *  MEI input output function prototype
 116  */
 117
 118 /**
 119  * mei_cl_is_connected - host client is connected
 120  *
 121  * @cl: host client
 122  *
 123  * Return: true if the host client is connected
 124  */
 125 static inline bool mei_cl_is_connected(struct mei_cl *cl)
 126 {
 127         return  cl->state == MEI_FILE_CONNECTED;
 128 }
 129
 130 /**
 131  * mei_cl_me_id - me client id
 132  *
 133  * @cl: host client
 134  *
 135  * Return: me client id or 0 if client is not connected
 136  */
 137 static inline u8 mei_cl_me_id(const struct mei_cl *cl)
 138 {
 139         return cl->me_cl ? cl->me_cl->client_id : 0;
 140 }
 141
 142 /**
 143  * mei_cl_mtu - maximal message that client can send and receive
 144  *
 145  * @cl: host client
 146  *
 147  * Return: mtu
 148  */
 149 static inline size_t mei_cl_mtu(const struct mei_cl *cl)
 150 {
 151         return cl->me_cl->props.max_msg_length;
 152 }
 153
 154 /**
 155  * mei_cl_is_fixed_address - check whether the me client uses fixed address
 156  *
 157  * @cl: host client
 158  *
 159  * Return: true if the client is connected and it has fixed me address
 160  */
 161 static inline bool mei_cl_is_fixed_address(const struct mei_cl *cl)
 162 {
 163         return cl->me_cl && cl->me_cl->props.fixed_address;
 164 }
 165
 166 /**
 167  * mei_cl_is_single_recv_buf- check whether the me client
 168  *       uses single receiving buffer
 169  *
 170  * @cl: host client
 171  *
 172  * Return: true if single_recv_buf == 1; 0 otherwise
 173  */
 174 static inline bool mei_cl_is_single_recv_buf(const struct mei_cl *cl)
 175 {
 176         return cl->me_cl->props.single_recv_buf;
 177 }
 178
 179 /**
 180  * mei_cl_uuid -  client's uuid
 181  *
 182  * @cl: host client
 183  *
 184  * Return: return uuid of connected me client
 185  */
 186 static inline const uuid_le *mei_cl_uuid(const struct mei_cl *cl)
 187 {
 188         return mei_me_cl_uuid(cl->me_cl);
 189 }
 190
 191 /**
 192  * mei_cl_host_addr - client's host address
 193  *
 194  * @cl: host client
 195  *
 196  * Return: 0 for fixed address client, host address for dynamic client
 197  */
 198 static inline u8 mei_cl_host_addr(const struct mei_cl *cl)
 199 {
 200         return  mei_cl_is_fixed_address(cl) ? 0 : cl->host_client_id;
 201 }
 202
 203 int mei_cl_disconnect(struct mei_cl *cl);
 204 void mei_cl_set_disconnected(struct mei_cl *cl);
 205 int mei_cl_irq_disconnect(struct mei_cl *cl, struct mei_cl_cb *cb,
 206                           struct mei_cl_cb *cmpl_list);
 207 int mei_cl_connect(struct mei_cl *cl, struct mei_me_client *me_cl,
 208                    struct file *file);
 209 int mei_cl_irq_connect(struct mei_cl *cl, struct mei_cl_cb *cb,
 210                               struct mei_cl_cb *cmpl_list);
 211 int mei_cl_read_start(struct mei_cl *cl, size_t length, struct file *fp);
 212 int mei_cl_irq_read_msg(struct mei_cl *cl, struct mei_msg_hdr *hdr,
 213                         struct mei_cl_cb *cmpl_list);
 214 int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking);
 215 int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb,
 216                      struct mei_cl_cb *cmpl_list);
 217
 218 void mei_cl_complete(struct mei_cl *cl, struct mei_cl_cb *cb);
 219
 220 void mei_host_client_init(struct work_struct *work);
 221
 222 void mei_cl_all_disconnect(struct mei_device *dev);
 223 void mei_cl_all_wakeup(struct mei_device *dev);
 224 void mei_cl_all_write_clear(struct mei_device *dev);
 225
 226 #define MEI_CL_FMT "cl:host=%02d me=%02d "
 227 #define MEI_CL_PRM(cl) (cl)->host_client_id, mei_cl_me_id(cl)
 228
 229 #define cl_dbg(dev, cl, format, arg...) \
 230         dev_dbg((dev)->dev, MEI_CL_FMT format, MEI_CL_PRM(cl), ##arg)
 231
 232 #define cl_err(dev, cl, format, arg...) \
 233         dev_err((dev)->dev, MEI_CL_FMT format, MEI_CL_PRM(cl), ##arg)
 234
 235 #endif /* _MEI_CLIENT_H_ */