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 u8 mei_cl_notify_fop2req(enum mei_cb_file_ops fop); 223 enum mei_cb_file_ops mei_cl_notify_req2fop(u8 request); 224 int mei_cl_notify_request(struct mei_cl *cl, struct file *file, u8 request); 225 int mei_cl_irq_notify(struct mei_cl *cl, struct mei_cl_cb *cb, 226 struct mei_cl_cb *cmpl_list); 227 int mei_cl_notify_get(struct mei_cl *cl, bool block, bool *notify_ev); 228 void mei_cl_notify(struct mei_cl *cl); 229 230 void mei_cl_all_disconnect(struct mei_device *dev); 231 void mei_cl_all_wakeup(struct mei_device *dev); 232 void mei_cl_all_write_clear(struct mei_device *dev); 233 234 #define MEI_CL_FMT "cl:host=%02d me=%02d " 235 #define MEI_CL_PRM(cl) (cl)->host_client_id, mei_cl_me_id(cl) 236 237 #define cl_dbg(dev, cl, format, arg...) \ 238 dev_dbg((dev)->dev, MEI_CL_FMT format, MEI_CL_PRM(cl), ##arg) 239 240 #define cl_err(dev, cl, format, arg...) \ 241 dev_err((dev)->dev, MEI_CL_FMT format, MEI_CL_PRM(cl), ##arg) 242 243 #endif /* _MEI_CLIENT_H_ */ 244