1 // SPDX-License-Identifier: ISC
2 /*
3 * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
4 */
5
6 #include <linux/module.h>
7 #if defined(__FreeBSD__)
8 #include <linux/delay.h>
9 #include <linux/kthread.h>
10 #endif
11 #include "mt76.h"
12
__mt76_poll(struct mt76_dev * dev,u32 offset,u32 mask,u32 val,int timeout)13 bool __mt76_poll(struct mt76_dev *dev, u32 offset, u32 mask, u32 val,
14 int timeout)
15 {
16 u32 cur;
17
18 timeout /= 10;
19 do {
20 cur = __mt76_rr(dev, offset) & mask;
21 if (cur == val)
22 return true;
23
24 udelay(10);
25 } while (timeout-- > 0);
26
27 return false;
28 }
29 EXPORT_SYMBOL_GPL(__mt76_poll);
30
____mt76_poll_msec(struct mt76_dev * dev,u32 offset,u32 mask,u32 val,int timeout,int tick)31 bool ____mt76_poll_msec(struct mt76_dev *dev, u32 offset, u32 mask, u32 val,
32 int timeout, int tick)
33 {
34 u32 cur;
35
36 timeout /= tick;
37 do {
38 cur = __mt76_rr(dev, offset) & mask;
39 if (cur == val)
40 return true;
41
42 usleep_range(1000 * tick, 2000 * tick);
43 } while (timeout-- > 0);
44
45 return false;
46 }
47 EXPORT_SYMBOL_GPL(____mt76_poll_msec);
48
mt76_wcid_alloc(u32 * mask,int size)49 int mt76_wcid_alloc(u32 *mask, int size)
50 {
51 int i, idx = 0, cur;
52
53 for (i = 0; i < DIV_ROUND_UP(size, 32); i++) {
54 idx = ffs(~mask[i]);
55 if (!idx)
56 continue;
57
58 idx--;
59 cur = i * 32 + idx;
60 if (cur >= size)
61 break;
62
63 mask[i] |= BIT(idx);
64 return cur;
65 }
66
67 return -1;
68 }
69 EXPORT_SYMBOL_GPL(mt76_wcid_alloc);
70
mt76_get_min_avg_rssi(struct mt76_dev * dev,bool ext_phy)71 int mt76_get_min_avg_rssi(struct mt76_dev *dev, bool ext_phy)
72 {
73 struct mt76_wcid *wcid;
74 int i, j, min_rssi = 0;
75 s8 cur_rssi;
76
77 local_bh_disable();
78 rcu_read_lock();
79
80 for (i = 0; i < ARRAY_SIZE(dev->wcid_mask); i++) {
81 u32 mask = dev->wcid_mask[i];
82 u32 phy_mask = dev->wcid_phy_mask[i];
83
84 if (!mask)
85 continue;
86
87 for (j = i * 32; mask; j++, mask >>= 1, phy_mask >>= 1) {
88 if (!(mask & 1))
89 continue;
90
91 if (!!(phy_mask & 1) != ext_phy)
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 }
115 EXPORT_SYMBOL_GPL(mt76_get_min_avg_rssi);
116
__mt76_worker_fn(void * ptr)117 int __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 }
143 EXPORT_SYMBOL_GPL(__mt76_worker_fn);
144
145 MODULE_LICENSE("Dual BSD/GPL");
146 #if defined(__FreeBSD__)
147 MODULE_VERSION(mt76_core, 1);
148 MODULE_DEPEND(mt76_core, linuxkpi, 1, 1, 1);
149 MODULE_DEPEND(mt76_core, linuxkpi_wlan, 1, 1, 1);
150 #endif
151