1 | // SPDX-License-Identifier: ISC |
2 | /* |
3 | * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name> |
4 | */ |
5 | |
6 | #include <linux/module.h> |
7 | #include "mt76.h" |
8 | |
9 | bool __mt76_poll(struct mt76_dev *dev, u32 offset, u32 mask, u32 val, |
10 | int timeout) |
11 | { |
12 | u32 cur; |
13 | |
14 | timeout /= 10; |
15 | do { |
16 | cur = __mt76_rr(dev, offset) & mask; |
17 | if (cur == val) |
18 | return true; |
19 | |
20 | udelay(10); |
21 | } while (timeout-- > 0); |
22 | |
23 | return false; |
24 | } |
25 | EXPORT_SYMBOL_GPL(__mt76_poll); |
26 | |
27 | bool ____mt76_poll_msec(struct mt76_dev *dev, u32 offset, u32 mask, u32 val, |
28 | int timeout, int tick) |
29 | { |
30 | u32 cur; |
31 | |
32 | timeout /= tick; |
33 | do { |
34 | cur = __mt76_rr(dev, offset) & mask; |
35 | if (cur == val) |
36 | return true; |
37 | |
38 | usleep_range(min: 1000 * tick, max: 2000 * tick); |
39 | } while (timeout-- > 0); |
40 | |
41 | return false; |
42 | } |
43 | EXPORT_SYMBOL_GPL(____mt76_poll_msec); |
44 | |
45 | int mt76_wcid_alloc(u32 *mask, int size) |
46 | { |
47 | int i, idx = 0, cur; |
48 | |
49 | for (i = 0; i < DIV_ROUND_UP(size, 32); i++) { |
50 | idx = ffs(~mask[i]); |
51 | if (!idx) |
52 | continue; |
53 | |
54 | idx--; |
55 | cur = i * 32 + idx; |
56 | if (cur >= size) |
57 | break; |
58 | |
59 | mask[i] |= BIT(idx); |
60 | return cur; |
61 | } |
62 | |
63 | return -1; |
64 | } |
65 | EXPORT_SYMBOL_GPL(mt76_wcid_alloc); |
66 | |
67 | int (struct mt76_dev *dev, bool ext_phy) |
68 | { |
69 | struct mt76_wcid *wcid; |
70 | int i, j, = 0; |
71 | s8 ; |
72 | |
73 | local_bh_disable(); |
74 | rcu_read_lock(); |
75 | |
76 | for (i = 0; i < ARRAY_SIZE(dev->wcid_mask); i++) { |
77 | u32 mask = dev->wcid_mask[i]; |
78 | u32 phy_mask = dev->wcid_phy_mask[i]; |
79 | |
80 | if (!mask) |
81 | continue; |
82 | |
83 | for (j = i * 32; mask; j++, mask >>= 1, phy_mask >>= 1) { |
84 | if (!(mask & 1)) |
85 | continue; |
86 | |
87 | if (!!(phy_mask & 1) != ext_phy) |
88 | continue; |
89 | |
90 | wcid = rcu_dereference(dev->wcid[j]); |
91 | if (!wcid) |
92 | continue; |
93 | |
94 | spin_lock(lock: &dev->rx_lock); |
95 | if (wcid->inactive_count++ < 5) |
96 | cur_rssi = -ewma_signal_read(e: &wcid->rssi); |
97 | else |
98 | cur_rssi = 0; |
99 | spin_unlock(lock: &dev->rx_lock); |
100 | |
101 | if (cur_rssi < min_rssi) |
102 | min_rssi = cur_rssi; |
103 | } |
104 | } |
105 | |
106 | rcu_read_unlock(); |
107 | local_bh_enable(); |
108 | |
109 | return min_rssi; |
110 | } |
111 | EXPORT_SYMBOL_GPL(mt76_get_min_avg_rssi); |
112 | |
113 | int __mt76_worker_fn(void *ptr) |
114 | { |
115 | struct mt76_worker *w = ptr; |
116 | |
117 | while (!kthread_should_stop()) { |
118 | set_current_state(TASK_INTERRUPTIBLE); |
119 | |
120 | if (kthread_should_park()) { |
121 | kthread_parkme(); |
122 | continue; |
123 | } |
124 | |
125 | if (!test_and_clear_bit(nr: MT76_WORKER_SCHEDULED, addr: &w->state)) { |
126 | schedule(); |
127 | continue; |
128 | } |
129 | |
130 | set_bit(nr: MT76_WORKER_RUNNING, addr: &w->state); |
131 | set_current_state(TASK_RUNNING); |
132 | w->fn(w); |
133 | cond_resched(); |
134 | clear_bit(nr: MT76_WORKER_RUNNING, addr: &w->state); |
135 | } |
136 | |
137 | return 0; |
138 | } |
139 | EXPORT_SYMBOL_GPL(__mt76_worker_fn); |
140 | |
141 | MODULE_DESCRIPTION("MediaTek MT76x helpers" ); |
142 | MODULE_LICENSE("Dual BSD/GPL" ); |
143 | |