blob: fb94ece32d126b3ac36d10b6fcc78db653c92a6a [file] [log] [blame]
developerb11a5392022-03-31 00:34:47 +08001// 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
9bool __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}
25EXPORT_SYMBOL_GPL(__mt76_poll);
26
27bool __mt76_poll_msec(struct mt76_dev *dev, u32 offset, u32 mask, u32 val,
28 int timeout)
29{
30 u32 cur;
31
32 timeout /= 10;
33 do {
34 cur = __mt76_rr(dev, offset) & mask;
35 if (cur == val)
36 return true;
37
38 usleep_range(10000, 20000);
39 } while (timeout-- > 0);
40
41 return false;
42}
43EXPORT_SYMBOL_GPL(__mt76_poll_msec);
44
45int 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}
65EXPORT_SYMBOL_GPL(mt76_wcid_alloc);
66
67int mt76_get_min_avg_rssi(struct mt76_dev *dev, u8 band)
68{
69 struct mt76_wcid *wcid;
70 int i, j, min_rssi = 0;
71 s8 cur_rssi;
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 u32 phy3_mask = dev->wcid_phy3_mask[i];
80
81 if (!mask)
82 continue;
83
84 for (j = i * 32; mask; j++, mask >>= 1, phy_mask >>= 1, phy3_mask >>= 1) {
85 if (!(mask & 1))
86 continue;
87
88 if (!!(phy_mask & 1) != band)
89 continue;
90
91 if (!!(phy3_mask & 1) != band)
92 continue;
93
94 wcid = rcu_dereference(dev->wcid[j]);
95 if (!wcid)
96 continue;
97
98 spin_lock(&dev->rx_lock);
99 if (wcid->inactive_count++ < 5)
100 cur_rssi = -ewma_signal_read(&wcid->rssi);
101 else
102 cur_rssi = 0;
103 spin_unlock(&dev->rx_lock);
104
105 if (cur_rssi < min_rssi)
106 min_rssi = cur_rssi;
107 }
108 }
109
110 rcu_read_unlock();
111 local_bh_enable();
112
113 return min_rssi;
114}
115EXPORT_SYMBOL_GPL(mt76_get_min_avg_rssi);
116
117int __mt76_worker_fn(void *ptr)
118{
119 struct mt76_worker *w = ptr;
120
121 while (!kthread_should_stop()) {
122 set_current_state(TASK_INTERRUPTIBLE);
123
124 if (kthread_should_park()) {
125 kthread_parkme();
126 continue;
127 }
128
129 if (!test_and_clear_bit(MT76_WORKER_SCHEDULED, &w->state)) {
130 schedule();
131 continue;
132 }
133
134 set_bit(MT76_WORKER_RUNNING, &w->state);
135 set_current_state(TASK_RUNNING);
136 w->fn(w);
137 cond_resched();
138 clear_bit(MT76_WORKER_RUNNING, &w->state);
139 }
140
141 return 0;
142}
143EXPORT_SYMBOL_GPL(__mt76_worker_fn);
144
145MODULE_LICENSE("Dual BSD/GPL");