tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: ISC
2/*
3 * Copyright (C) 2019 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
4 */
5
6#include "mt76.h"
7
8struct sk_buff *
9mt76_mcu_msg_alloc(const void *data, int head_len,
10 int data_len, int tail_len)
11{
12 struct sk_buff *skb;
13
14 skb = alloc_skb(head_len + data_len + tail_len,
15 GFP_KERNEL);
16 if (!skb)
17 return NULL;
18
19 skb_reserve(skb, head_len);
20 if (data && data_len)
21 skb_put_data(skb, data, data_len);
22
23 return skb;
24}
25EXPORT_SYMBOL_GPL(mt76_mcu_msg_alloc);
26
27/* mmio */
28struct sk_buff *mt76_mcu_get_response(struct mt76_dev *dev,
29 unsigned long expires)
30{
31 unsigned long timeout;
32
33 if (!time_is_after_jiffies(expires))
34 return NULL;
35
36 timeout = expires - jiffies;
37 wait_event_timeout(dev->mmio.mcu.wait,
38 !skb_queue_empty(&dev->mmio.mcu.res_q),
39 timeout);
40 return skb_dequeue(&dev->mmio.mcu.res_q);
41}
42EXPORT_SYMBOL_GPL(mt76_mcu_get_response);
43
44void mt76_mcu_rx_event(struct mt76_dev *dev, struct sk_buff *skb)
45{
46 skb_queue_tail(&dev->mmio.mcu.res_q, skb);
47 wake_up(&dev->mmio.mcu.wait);
48}
49EXPORT_SYMBOL_GPL(mt76_mcu_rx_event);