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
__mt76_poll(struct mt76_dev * dev,u32 offset,u32 mask,u32 val,int timeout)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
__mt76_poll_msec(struct mt76_dev * dev,u32 offset,u32 mask,u32 val,int timeout)27 bool __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 }
43 EXPORT_SYMBOL_GPL(__mt76_poll_msec);
44
mt76_wcid_alloc(u32 * mask,int size)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
mt76_get_min_avg_rssi(struct mt76_dev * dev,bool ext_phy)67 int mt76_get_min_avg_rssi(struct mt76_dev *dev, bool ext_phy)
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
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(&dev->rx_lock);
95 if (wcid->inactive_count++ < 5)
96 cur_rssi = -ewma_signal_read(&wcid->rssi);
97 else
98 cur_rssi = 0;
99 spin_unlock(&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
__mt76_worker_fn(void * ptr)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(MT76_WORKER_SCHEDULED, &w->state)) {
126 schedule();
127 continue;
128 }
129
130 set_bit(MT76_WORKER_RUNNING, &w->state);
131 set_current_state(TASK_RUNNING);
132 w->fn(w);
133 cond_resched();
134 clear_bit(MT76_WORKER_RUNNING, &w->state);
135 }
136
137 return 0;
138 }
139 EXPORT_SYMBOL_GPL(__mt76_worker_fn);
140
141 MODULE_LICENSE("Dual BSD/GPL");
142