Commit | Line | Data |
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a1c55580 CL |
1 | /* |
2 | * Copyright (c) 2009 Atheros Communications Inc. | |
3 | * | |
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. | |
7 | * | |
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. | |
15 | */ | |
16 | ||
17 | #include <linux/kernel.h> | |
18 | #include <linux/module.h> | |
19 | ||
d15dd3e5 LR |
20 | #include "ath.h" |
21 | ||
a1c55580 CL |
22 | MODULE_AUTHOR("Atheros Communications"); |
23 | MODULE_DESCRIPTION("Shared library for Atheros wireless LAN cards."); | |
24 | MODULE_LICENSE("Dual BSD/GPL"); | |
d15dd3e5 LR |
25 | |
26 | struct sk_buff *ath_rxbuf_alloc(struct ath_common *common, | |
27 | u32 len, | |
28 | gfp_t gfp_mask) | |
29 | { | |
30 | struct sk_buff *skb; | |
31 | u32 off; | |
32 | ||
33 | /* | |
34 | * Cache-line-align. This is important (for the | |
35 | * 5210 at least) as not doing so causes bogus data | |
36 | * in rx'd frames. | |
37 | */ | |
38 | ||
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 | |
45 | * systems :( */ | |
46 | skb = __dev_alloc_skb(len + common->cachelsz - 1, gfp_mask); | |
47 | if (skb != NULL) { | |
48 | off = ((unsigned long) skb->data) % common->cachelsz; | |
49 | if (off != 0) | |
50 | skb_reserve(skb, common->cachelsz - off); | |
51 | } else { | |
52 | printk(KERN_ERR "skbuff alloc of size %u failed\n", len); | |
53 | return NULL; | |
54 | } | |
55 | ||
56 | return skb; | |
57 | } | |
58 | EXPORT_SYMBOL(ath_rxbuf_alloc); | |
21a99f93 | 59 | |
29e76245 | 60 | void ath_printk(const char *level, const char *fmt, ...) |
21a99f93 JP |
61 | { |
62 | struct va_format vaf; | |
63 | va_list args; | |
21a99f93 JP |
64 | |
65 | va_start(args, fmt); | |
66 | ||
67 | vaf.fmt = fmt; | |
68 | vaf.va = &args; | |
69 | ||
29e76245 | 70 | printk("%sath: %pV", level, &vaf); |
21a99f93 JP |
71 | |
72 | va_end(args); | |
21a99f93 JP |
73 | } |
74 | EXPORT_SYMBOL(ath_printk); |