56 struct ipmb_dev {  struct
69 static inline struct ipmb_dev *to_ipmb_dev(struct file *file)  in to_ipmb_dev()  argument
71 	return container_of(file->private_data, struct ipmb_dev, miscdev);  in to_ipmb_dev()
77 	struct ipmb_dev *ipmb_dev = to_ipmb_dev(file);  in ipmb_read()  local
84 	spin_lock_irq(&ipmb_dev->lock);  in ipmb_read()
86 	while (list_empty(&ipmb_dev->request_queue)) {  in ipmb_read()
87 		spin_unlock_irq(&ipmb_dev->lock);  in ipmb_read()
92 		ret = wait_event_interruptible(ipmb_dev->wait_queue,  in ipmb_read()
93 				!list_empty(&ipmb_dev->request_queue));  in ipmb_read()
97 		spin_lock_irq(&ipmb_dev->lock);  in ipmb_read()
100 	queue_elem = list_first_entry(&ipmb_dev->request_queue,  in ipmb_read()
105 	atomic_dec(&ipmb_dev->request_queue_len);  in ipmb_read()
107 	spin_unlock_irq(&ipmb_dev->lock);  in ipmb_read()
138 	struct ipmb_dev *ipmb_dev = to_ipmb_dev(file);  in ipmb_write()  local
157 	if (ipmb_dev->is_i2c_protocol) {  in ipmb_write()
158 		ret = ipmb_i2c_write(ipmb_dev->client, msg, rq_sa);  in ipmb_write()
172 	ret = i2c_smbus_xfer(ipmb_dev->client->adapter, rq_sa,  in ipmb_write()
173 			     ipmb_dev->client->flags,  in ipmb_write()
182 	struct ipmb_dev *ipmb_dev = to_ipmb_dev(file);  in ipmb_poll()  local
185 	mutex_lock(&ipmb_dev->file_mutex);  in ipmb_poll()
186 	poll_wait(file, &ipmb_dev->wait_queue, wait);  in ipmb_poll()
188 	if (atomic_read(&ipmb_dev->request_queue_len))  in ipmb_poll()
190 	mutex_unlock(&ipmb_dev->file_mutex);  in ipmb_poll()
203 static void ipmb_handle_request(struct ipmb_dev *ipmb_dev)  in ipmb_handle_request()  argument
207 	if (atomic_read(&ipmb_dev->request_queue_len) >=  in ipmb_handle_request()
215 	memcpy(&queue_elem->request, &ipmb_dev->request,  in ipmb_handle_request()
217 	list_add(&queue_elem->list, &ipmb_dev->request_queue);  in ipmb_handle_request()
218 	atomic_inc(&ipmb_dev->request_queue_len);  in ipmb_handle_request()
219 	wake_up_all(&ipmb_dev->wait_queue);  in ipmb_handle_request()
222 static u8 ipmb_verify_checksum1(struct ipmb_dev *ipmb_dev, u8 rs_sa)  in ipmb_verify_checksum1()  argument
225 	return (rs_sa + ipmb_dev->request.netfn_rs_lun +  in ipmb_verify_checksum1()
226 		ipmb_dev->request.checksum1);  in ipmb_verify_checksum1()
233 static bool is_ipmb_msg(struct ipmb_dev *ipmb_dev, u8 rs_sa)  in is_ipmb_msg()  argument
235 	if ((ipmb_dev->msg_idx >= IPMB_REQUEST_LEN_MIN) &&  in is_ipmb_msg()
236 	   (!ipmb_verify_checksum1(ipmb_dev, rs_sa)))  in is_ipmb_msg()
252 	struct ipmb_dev *ipmb_dev = i2c_get_clientdata(client);  in ipmb_slave_cb()  local
253 	u8 *buf = (u8 *)&ipmb_dev->request;  in ipmb_slave_cb()
256 	spin_lock_irqsave(&ipmb_dev->lock, flags);  in ipmb_slave_cb()
259 		memset(&ipmb_dev->request, 0, sizeof(ipmb_dev->request));  in ipmb_slave_cb()
260 		ipmb_dev->msg_idx = 0;  in ipmb_slave_cb()
278 		buf[++ipmb_dev->msg_idx] = GET_8BIT_ADDR(client->addr);  in ipmb_slave_cb()
282 		if (ipmb_dev->msg_idx >= sizeof(struct ipmb_msg) - 1)  in ipmb_slave_cb()
285 		buf[++ipmb_dev->msg_idx] = *val;  in ipmb_slave_cb()
289 		ipmb_dev->request.len = ipmb_dev->msg_idx;  in ipmb_slave_cb()
290 		if (is_ipmb_msg(ipmb_dev, GET_8BIT_ADDR(client->addr)))  in ipmb_slave_cb()
291 			ipmb_handle_request(ipmb_dev);  in ipmb_slave_cb()
297 	spin_unlock_irqrestore(&ipmb_dev->lock, flags);  in ipmb_slave_cb()
305 	struct ipmb_dev *ipmb_dev;  in ipmb_probe()  local
308 	ipmb_dev = devm_kzalloc(&client->dev, sizeof(*ipmb_dev),  in ipmb_probe()
310 	if (!ipmb_dev)  in ipmb_probe()
313 	spin_lock_init(&ipmb_dev->lock);  in ipmb_probe()
314 	init_waitqueue_head(&ipmb_dev->wait_queue);  in ipmb_probe()
315 	atomic_set(&ipmb_dev->request_queue_len, 0);  in ipmb_probe()
316 	INIT_LIST_HEAD(&ipmb_dev->request_queue);  in ipmb_probe()
318 	mutex_init(&ipmb_dev->file_mutex);  in ipmb_probe()
320 	ipmb_dev->miscdev.minor = MISC_DYNAMIC_MINOR;  in ipmb_probe()
322 	ipmb_dev->miscdev.name = devm_kasprintf(&client->dev, GFP_KERNEL,  in ipmb_probe()
325 	ipmb_dev->miscdev.fops = &ipmb_fops;  in ipmb_probe()
326 	ipmb_dev->miscdev.parent = &client->dev;  in ipmb_probe()
327 	ret = misc_register(&ipmb_dev->miscdev);  in ipmb_probe()
331 	ipmb_dev->is_i2c_protocol  in ipmb_probe()
334 	ipmb_dev->client = client;  in ipmb_probe()
335 	i2c_set_clientdata(client, ipmb_dev);  in ipmb_probe()
338 		misc_deregister(&ipmb_dev->miscdev);  in ipmb_probe()
347 	struct ipmb_dev *ipmb_dev = i2c_get_clientdata(client);  in ipmb_remove()  local
350 	misc_deregister(&ipmb_dev->miscdev);  in ipmb_remove()