2 * Copyright (c) 2009 Atheros Communications Inc.
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 #include <linux/kernel.h>
18 #include <linux/module.h>
22 MODULE_AUTHOR("Atheros Communications");
23 MODULE_DESCRIPTION("Shared library for Atheros wireless LAN cards.");
24 MODULE_LICENSE("Dual BSD/GPL");
26 struct sk_buff
*ath_rxbuf_alloc(struct ath_common
*common
,
34 * Cache-line-align. This is important (for the
35 * 5210 at least) as not doing so causes bogus data
39 /* Note: the kernel can allocate a value greater than
40 * what we ask it to give us. We really only need 4 KB as that
41 * is this hardware supports and in fact we need at least 3849
42 * as that is the MAX AMSDU size this hardware supports.
43 * Unfortunately this means we may get 8 KB here from the
44 * kernel... and that is actually what is observed on some
46 skb
= __dev_alloc_skb(len
+ common
->cachelsz
- 1, gfp_mask
);
48 off
= ((unsigned long) skb
->data
) % common
->cachelsz
;
50 skb_reserve(skb
, common
->cachelsz
- off
);
52 printk(KERN_ERR
"skbuff alloc of size %u failed\n", len
);
58 EXPORT_SYMBOL(ath_rxbuf_alloc
);
60 void ath_printk(const char *level
, const char *fmt
, ...)
70 printk("%sath: %pV", level
, &vaf
);
74 EXPORT_SYMBOL(ath_printk
);