111 static bool mei_init(struct mei *me, const uuid_le *guid,  in mei_init()  argument
118 	me->verbose = verbose;  in mei_init()
120 	me->fd = open("/dev/mei0", O_RDWR);  in mei_init()
121 	if (me->fd == -1) {  in mei_init()
122 		mei_err(me, "Cannot establish a handle to the Intel MEI driver\n");  in mei_init()
125 	memcpy(&me->guid, guid, sizeof(*guid));  in mei_init()
127 	me->initialized = true;  in mei_init()
129 	memcpy(&data.in_client_uuid, &me->guid, sizeof(me->guid));  in mei_init()
130 	result = ioctl(me->fd, IOCTL_MEI_CONNECT_CLIENT, &data);  in mei_init()
132 		mei_err(me, "IOCTL_MEI_CONNECT_CLIENT receive message. err=%d\n", result);  in mei_init()
136 	mei_msg(me, "max_message_length %d\n", cl->max_msg_length);  in mei_init()
137 	mei_msg(me, "protocol_version %d\n", cl->protocol_version);  in mei_init()
141 		mei_err(me, "Intel MEI protocol version not supported\n");  in mei_init()
145 	me->buf_size = cl->max_msg_length;  in mei_init()
146 	me->prot_ver = cl->protocol_version;  in mei_init()
150 	mei_deinit(me);  in mei_init()
154 static ssize_t mei_recv_msg(struct mei *me, unsigned char *buffer,  in mei_recv_msg()  argument
164 	mei_msg(me, "call read length = %zd\n", len);  in mei_recv_msg()
167 	FD_SET(me->fd, &set);  in mei_recv_msg()
168 	rc = select(me->fd + 1, &set, NULL, NULL, &tv);  in mei_recv_msg()
169 	if (rc > 0 && FD_ISSET(me->fd, &set)) {  in mei_recv_msg()
170 		mei_msg(me, "have reply\n");  in mei_recv_msg()
173 		mei_err(me, "read failed on timeout\n");  in mei_recv_msg()
177 		mei_err(me, "read failed on select with status %zd %s\n",  in mei_recv_msg()
182 	rc = read(me->fd, buffer, len);  in mei_recv_msg()
184 		mei_err(me, "read failed with status %zd %s\n",  in mei_recv_msg()
189 	mei_msg(me, "read succeeded with result %zd\n", rc);  in mei_recv_msg()
193 		mei_deinit(me);  in mei_recv_msg()
198 static ssize_t mei_send_msg(struct mei *me, const unsigned char *buffer,  in mei_send_msg()  argument
204 	mei_msg(me, "call write length = %zd\n", len);  in mei_send_msg()
206 	written = write(me->fd, buffer, len);  in mei_send_msg()
209 		mei_err(me, "write failed with status %zd %s\n",  in mei_send_msg()
213 	mei_msg(me, "write success\n");  in mei_send_msg()
218 		mei_deinit(me);  in mei_send_msg()