| developer | b11a539 | 2022-03-31 00:34:47 +0800 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 2 | /* |
| 3 | * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name> |
| 4 | * Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com> |
| 5 | */ |
| 6 | |
| 7 | #ifndef __MT76_UTIL_H |
| 8 | #define __MT76_UTIL_H |
| 9 | |
| 10 | #include <linux/skbuff.h> |
| 11 | #include <linux/bitops.h> |
| 12 | #include <linux/bitfield.h> |
| 13 | #include <net/mac80211.h> |
| 14 | |
| 15 | struct mt76_worker |
| 16 | { |
| 17 | struct task_struct *task; |
| 18 | void (*fn)(struct mt76_worker *); |
| 19 | unsigned long state; |
| 20 | }; |
| 21 | |
| 22 | enum { |
| 23 | MT76_WORKER_SCHEDULED, |
| 24 | MT76_WORKER_RUNNING, |
| 25 | }; |
| 26 | |
| 27 | #define MT76_INCR(_var, _size) \ |
| 28 | (_var = (((_var) + 1) % (_size))) |
| 29 | |
| 30 | int mt76_wcid_alloc(u32 *mask, int size); |
| 31 | |
| 32 | static inline bool |
| 33 | mt76_wcid_mask_test(u32 *mask, int idx) |
| 34 | { |
| 35 | return mask[idx / 32] & BIT(idx % 32); |
| 36 | } |
| 37 | |
| 38 | static inline void |
| 39 | mt76_wcid_mask_set(u32 *mask, int idx) |
| 40 | { |
| 41 | mask[idx / 32] |= BIT(idx % 32); |
| 42 | } |
| 43 | |
| 44 | static inline void |
| 45 | mt76_wcid_mask_clear(u32 *mask, int idx) |
| 46 | { |
| 47 | mask[idx / 32] &= ~BIT(idx % 32); |
| 48 | } |
| 49 | |
| 50 | static inline void |
| 51 | mt76_skb_set_moredata(struct sk_buff *skb, bool enable) |
| 52 | { |
| 53 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| 54 | |
| 55 | if (enable) |
| 56 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA); |
| 57 | else |
| 58 | hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA); |
| 59 | } |
| 60 | |
| 61 | int __mt76_worker_fn(void *ptr); |
| 62 | |
| 63 | static inline int |
| 64 | mt76_worker_setup(struct ieee80211_hw *hw, struct mt76_worker *w, |
| 65 | void (*fn)(struct mt76_worker *), |
| 66 | const char *name) |
| 67 | { |
| 68 | const char *dev_name = wiphy_name(hw->wiphy); |
| 69 | int ret; |
| 70 | |
| 71 | if (fn) |
| 72 | w->fn = fn; |
| 73 | w->task = kthread_run(__mt76_worker_fn, w, |
| 74 | "mt76-%s %s", name, dev_name); |
| 75 | |
| 76 | if (IS_ERR(w->task)) { |
| 77 | ret = PTR_ERR(w->task); |
| 78 | w->task = NULL; |
| 79 | return ret; |
| 80 | } |
| 81 | |
| 82 | return 0; |
| 83 | } |
| 84 | |
| 85 | static inline void mt76_worker_schedule(struct mt76_worker *w) |
| 86 | { |
| 87 | if (!w->task) |
| 88 | return; |
| 89 | |
| 90 | if (!test_and_set_bit(MT76_WORKER_SCHEDULED, &w->state) && |
| 91 | !test_bit(MT76_WORKER_RUNNING, &w->state)) |
| 92 | wake_up_process(w->task); |
| 93 | } |
| 94 | |
| 95 | static inline void mt76_worker_disable(struct mt76_worker *w) |
| 96 | { |
| 97 | if (!w->task) |
| 98 | return; |
| 99 | |
| 100 | kthread_park(w->task); |
| 101 | WRITE_ONCE(w->state, 0); |
| 102 | } |
| 103 | |
| 104 | static inline void mt76_worker_enable(struct mt76_worker *w) |
| 105 | { |
| 106 | if (!w->task) |
| 107 | return; |
| 108 | |
| 109 | kthread_unpark(w->task); |
| 110 | mt76_worker_schedule(w); |
| 111 | } |
| 112 | |
| 113 | static inline void mt76_worker_teardown(struct mt76_worker *w) |
| 114 | { |
| 115 | if (!w->task) |
| 116 | return; |
| 117 | |
| 118 | kthread_stop(w->task); |
| 119 | w->task = NULL; |
| 120 | } |
| 121 | |
| 122 | #endif |