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(const struct mei_cl *cl, 137 const struct file *fp); 138 struct mei_cl_cb *mei_cl_alloc_cb(struct mei_cl *cl, size_t length, 139 enum mei_cb_file_ops type, 140 const struct file *fp); 141 struct mei_cl_cb *mei_cl_enqueue_ctrl_wr_cb(struct mei_cl *cl, size_t length, 142 enum mei_cb_file_ops type, 143 const struct file *fp); 144 int mei_cl_flush_queues(struct mei_cl *cl, const struct file *fp); 145 146 /* 147 * MEI input output function prototype 148 */ 149 150 /** 151 * mei_cl_is_connected - host client is connected 152 * 153 * @cl: host client 154 * 155 * Return: true if the host client is connected 156 */ 157 static inline bool mei_cl_is_connected(struct mei_cl *cl) 158 { 159 return cl->state == MEI_FILE_CONNECTED; 160 } 161 162 /** 163 * mei_cl_me_id - me client id 164 * 165 * @cl: host client 166 * 167 * Return: me client id or 0 if client is not connected 168 */ 169 static inline u8 mei_cl_me_id(const struct mei_cl *cl) 170 { 171 return cl->me_cl ? cl->me_cl->client_id : 0; 172 } 173 174 /** 175 * mei_cl_mtu - maximal message that client can send and receive 176 * 177 * @cl: host client 178 * 179 * Return: mtu 180 */ 181 static inline size_t mei_cl_mtu(const struct mei_cl *cl) 182 { 183 return cl->me_cl->props.max_msg_length; 184 } 185 186 /** 187 * mei_cl_is_fixed_address - check whether the me client uses fixed address 188 * 189 * @cl: host client 190 * 191 * Return: true if the client is connected and it has fixed me address 192 */ 193 static inline bool mei_cl_is_fixed_address(const struct mei_cl *cl) 194 { 195 return cl->me_cl && cl->me_cl->props.fixed_address; 196 } 197 198 /** 199 * mei_cl_is_single_recv_buf- check whether the me client 200 * uses single receiving buffer 201 * 202 * @cl: host client 203 * 204 * Return: true if single_recv_buf == 1; 0 otherwise 205 */ 206 static inline bool mei_cl_is_single_recv_buf(const struct mei_cl *cl) 207 { 208 return cl->me_cl->props.single_recv_buf; 209 } 210 211 /** 212 * mei_cl_uuid - client's uuid 213 * 214 * @cl: host client 215 * 216 * Return: return uuid of connected me client 217 */ 218 static inline const uuid_le *mei_cl_uuid(const struct mei_cl *cl) 219 { 220 return mei_me_cl_uuid(cl->me_cl); 221 } 222 223 /** 224 * mei_cl_host_addr - client's host address 225 * 226 * @cl: host client 227 * 228 * Return: 0 for fixed address client, host address for dynamic client 229 */ 230 static inline u8 mei_cl_host_addr(const struct mei_cl *cl) 231 { 232 return mei_cl_is_fixed_address(cl) ? 0 : cl->host_client_id; 233 } 234 235 int mei_cl_disconnect(struct mei_cl *cl); 236 int mei_cl_irq_disconnect(struct mei_cl *cl, struct mei_cl_cb *cb, 237 struct list_head *cmpl_list); 238 int mei_cl_connect(struct mei_cl *cl, struct mei_me_client *me_cl, 239 const struct file *file); 240 int mei_cl_irq_connect(struct mei_cl *cl, struct mei_cl_cb *cb, 241 struct list_head *cmpl_list); 242 int mei_cl_read_start(struct mei_cl *cl, size_t length, const struct file *fp); 243 ssize_t mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb); 244 int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb, 245 struct list_head *cmpl_list); 246 247 void mei_cl_complete(struct mei_cl *cl, struct mei_cl_cb *cb); 248 249 void mei_host_client_init(struct mei_device *dev); 250 251 u8 mei_cl_notify_fop2req(enum mei_cb_file_ops fop); 252 enum mei_cb_file_ops mei_cl_notify_req2fop(u8 request); 253 int mei_cl_notify_request(struct mei_cl *cl, 254 const struct file *file, u8 request); 255 int mei_cl_irq_notify(struct mei_cl *cl, struct mei_cl_cb *cb, 256 struct list_head *cmpl_list); 257 int mei_cl_notify_get(struct mei_cl *cl, bool block, bool *notify_ev); 258 void mei_cl_notify(struct mei_cl *cl); 259 260 void mei_cl_all_disconnect(struct mei_device *dev); 261 262 #define MEI_CL_FMT "cl:host=%02d me=%02d " 263 #define MEI_CL_PRM(cl) (cl)->host_client_id, mei_cl_me_id(cl) 264 265 #define cl_dbg(dev, cl, format, arg...) \ 266 dev_dbg((dev)->dev, MEI_CL_FMT format, MEI_CL_PRM(cl), ##arg) 267 268 #define cl_warn(dev, cl, format, arg...) \ 269 dev_warn((dev)->dev, MEI_CL_FMT format, MEI_CL_PRM(cl), ##arg) 270 271 #define cl_err(dev, cl, format, arg...) \ 272 dev_err((dev)->dev, MEI_CL_FMT format, MEI_CL_PRM(cl), ##arg) 273 274 #endif /* _MEI_CLIENT_H_ */ 275