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
  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, 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(1000 * tick, 2000 * tick);
 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, 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}
111EXPORT_SYMBOL_GPL(mt76_get_min_avg_rssi);
112
113int __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}
139EXPORT_SYMBOL_GPL(__mt76_worker_fn);
140
141MODULE_DESCRIPTION("MediaTek MT76x helpers");
142MODULE_LICENSE("Dual BSD/GPL");

  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
  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, 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}
111EXPORT_SYMBOL_GPL(mt76_get_min_avg_rssi);
112
113int __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}
139EXPORT_SYMBOL_GPL(__mt76_worker_fn);
140
 
141MODULE_LICENSE("Dual BSD/GPL");