1 | // SPDX-License-Identifier: ISC |
2 | /* |
3 | * Copyright (C) 2019 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com> |
4 | */ |
5 | |
6 | #include "mt76.h" |
7 | |
8 | struct sk_buff * |
9 | __mt76_mcu_msg_alloc(struct mt76_dev *dev, const void *data, |
10 | int len, int data_len, gfp_t gfp) |
11 | { |
12 | const struct mt76_mcu_ops *ops = dev->mcu_ops; |
13 | struct sk_buff *skb; |
14 | |
15 | len = max_t(int, len, data_len); |
16 | len = ops->headroom + len + ops->tailroom; |
17 | |
18 | skb = alloc_skb(size: len, priority: gfp); |
19 | if (!skb) |
20 | return NULL; |
21 | |
22 | memset(skb->head, 0, len); |
23 | skb_reserve(skb, len: ops->headroom); |
24 | |
25 | if (data && data_len) |
26 | skb_put_data(skb, data, len: data_len); |
27 | |
28 | return skb; |
29 | } |
30 | EXPORT_SYMBOL_GPL(__mt76_mcu_msg_alloc); |
31 | |
32 | struct sk_buff *mt76_mcu_get_response(struct mt76_dev *dev, |
33 | unsigned long expires) |
34 | { |
35 | unsigned long timeout; |
36 | |
37 | if (!time_is_after_jiffies(expires)) |
38 | return NULL; |
39 | |
40 | timeout = expires - jiffies; |
41 | wait_event_timeout(dev->mcu.wait, |
42 | (!skb_queue_empty(&dev->mcu.res_q) || |
43 | test_bit(MT76_MCU_RESET, &dev->phy.state)), |
44 | timeout); |
45 | return skb_dequeue(list: &dev->mcu.res_q); |
46 | } |
47 | EXPORT_SYMBOL_GPL(mt76_mcu_get_response); |
48 | |
49 | void mt76_mcu_rx_event(struct mt76_dev *dev, struct sk_buff *skb) |
50 | { |
51 | skb_queue_tail(list: &dev->mcu.res_q, newsk: skb); |
52 | wake_up(&dev->mcu.wait); |
53 | } |
54 | EXPORT_SYMBOL_GPL(mt76_mcu_rx_event); |
55 | |
56 | int mt76_mcu_send_and_get_msg(struct mt76_dev *dev, int cmd, const void *data, |
57 | int len, bool wait_resp, struct sk_buff **ret_skb) |
58 | { |
59 | struct sk_buff *skb; |
60 | |
61 | if (dev->mcu_ops->mcu_send_msg) |
62 | return dev->mcu_ops->mcu_send_msg(dev, cmd, data, len, wait_resp); |
63 | |
64 | skb = mt76_mcu_msg_alloc(dev, data, data_len: len); |
65 | if (!skb) |
66 | return -ENOMEM; |
67 | |
68 | return mt76_mcu_skb_send_and_get_msg(dev, skb, cmd, wait_resp, ret: ret_skb); |
69 | } |
70 | EXPORT_SYMBOL_GPL(mt76_mcu_send_and_get_msg); |
71 | |
72 | int mt76_mcu_skb_send_and_get_msg(struct mt76_dev *dev, struct sk_buff *skb, |
73 | int cmd, bool wait_resp, |
74 | struct sk_buff **ret_skb) |
75 | { |
76 | unsigned long expires; |
77 | int ret, seq; |
78 | |
79 | if (ret_skb) |
80 | *ret_skb = NULL; |
81 | |
82 | mutex_lock(&dev->mcu.mutex); |
83 | |
84 | ret = dev->mcu_ops->mcu_skb_send_msg(dev, skb, cmd, &seq); |
85 | if (ret < 0) |
86 | goto out; |
87 | |
88 | if (!wait_resp) { |
89 | ret = 0; |
90 | goto out; |
91 | } |
92 | |
93 | expires = jiffies + dev->mcu.timeout; |
94 | |
95 | do { |
96 | skb = mt76_mcu_get_response(dev, expires); |
97 | ret = dev->mcu_ops->mcu_parse_response(dev, cmd, skb, seq); |
98 | if (!ret && ret_skb) |
99 | *ret_skb = skb; |
100 | else |
101 | dev_kfree_skb(skb); |
102 | } while (ret == -EAGAIN); |
103 | |
104 | out: |
105 | mutex_unlock(lock: &dev->mcu.mutex); |
106 | |
107 | return ret; |
108 | } |
109 | EXPORT_SYMBOL_GPL(mt76_mcu_skb_send_and_get_msg); |
110 | |
111 | int __mt76_mcu_send_firmware(struct mt76_dev *dev, int cmd, const void *data, |
112 | int len, int max_len) |
113 | { |
114 | int err, cur_len; |
115 | |
116 | while (len > 0) { |
117 | cur_len = min_t(int, max_len, len); |
118 | |
119 | err = mt76_mcu_send_msg(dev, cmd, data, len: cur_len, wait_resp: false); |
120 | if (err) |
121 | return err; |
122 | |
123 | data += cur_len; |
124 | len -= cur_len; |
125 | |
126 | if (dev->queue_ops->tx_cleanup) |
127 | dev->queue_ops->tx_cleanup(dev, |
128 | dev->q_mcu[MT_MCUQ_FWDL], |
129 | false); |
130 | } |
131 | |
132 | return 0; |
133 | } |
134 | EXPORT_SYMBOL_GPL(__mt76_mcu_send_firmware); |
135 | |