developer | 0f312e8 | 2022-11-01 12:31:52 +0800 | [diff] [blame] | 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) |
| 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 | |
| 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 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 | |
| 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"); |