mirror of
https://github.com/outbackdingo/mt76.git
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108 lines
2.3 KiB
C
108 lines
2.3 KiB
C
/*
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* Copyright (C) 2016 Felix Fietkau <[email protected]>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <linux/module.h>
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#include "mt76.h"
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void mt76_remove_hdr_pad(struct sk_buff *skb)
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{
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int len = ieee80211_get_hdrlen_from_skb(skb);
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memmove(skb->data + 2, skb->data, len);
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skb_pull(skb, 2);
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}
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EXPORT_SYMBOL_GPL(mt76_remove_hdr_pad);
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int mt76_insert_hdr_pad(struct sk_buff *skb)
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{
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int len = ieee80211_get_hdrlen_from_skb(skb);
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int ret;
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if (len % 4 == 0)
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return 0;
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if (skb_headroom(skb) < 2 &&
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(ret = pskb_expand_head(skb, 2, 0, GFP_ATOMIC)) != 0)
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return ret;
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skb_push(skb, 2);
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memmove(skb->data, skb->data + 2, len);
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skb->data[len] = 0;
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skb->data[len + 1] = 0;
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return 2;
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}
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EXPORT_SYMBOL_GPL(mt76_insert_hdr_pad);
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bool __mt76_poll(struct mt76_dev *dev, u32 offset, u32 mask, u32 val,
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int timeout)
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{
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u32 cur;
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timeout /= 10;
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do {
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cur = dev->bus->rr(dev, offset) & mask;
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if (cur == val)
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return true;
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udelay(10);
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} while (timeout-- > 0);
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return false;
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}
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EXPORT_SYMBOL_GPL(__mt76_poll);
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bool __mt76_poll_msec(struct mt76_dev *dev, u32 offset, u32 mask, u32 val,
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int timeout)
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{
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u32 cur;
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timeout /= 10;
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do {
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cur = dev->bus->rr(dev, offset) & mask;
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if (cur == val)
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return true;
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msleep(10);
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} while (timeout-- > 0);
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return false;
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}
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EXPORT_SYMBOL_GPL(__mt76_poll_msec);
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int mt76_wcid_alloc(unsigned long *mask, int size)
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{
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int i, idx = 0, cur;
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for (i = 0; i < size / BITS_PER_LONG; i++) {
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idx = ffs(~mask[i]);
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if (!idx)
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continue;
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idx--;
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cur = i * BITS_PER_LONG + idx;
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if (cur >= size)
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break;
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mask[i] |= BIT(idx);
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return cur;
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}
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return -1;
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}
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EXPORT_SYMBOL_GPL(mt76_wcid_alloc);
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MODULE_LICENSE("GPL");
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