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 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
18 | |
19 | #include <linux/kernel.h> |
20 | #include <linux/module.h> |
21 | |
22 | #include "ath.h" |
23 | #include "trace.h" |
24 | |
25 | MODULE_AUTHOR("Atheros Communications" ); |
26 | MODULE_DESCRIPTION("Shared library for Atheros wireless LAN cards." ); |
27 | MODULE_LICENSE("Dual BSD/GPL" ); |
28 | |
29 | struct sk_buff *ath_rxbuf_alloc(struct ath_common *common, |
30 | u32 len, |
31 | gfp_t gfp_mask) |
32 | { |
33 | struct sk_buff *skb; |
34 | u32 off; |
35 | |
36 | /* |
37 | * Cache-line-align. This is important (for the |
38 | * 5210 at least) as not doing so causes bogus data |
39 | * in rx'd frames. |
40 | */ |
41 | |
42 | /* Note: the kernel can allocate a value greater than |
43 | * what we ask it to give us. We really only need 4 KB as that |
44 | * is this hardware supports and in fact we need at least 3849 |
45 | * as that is the MAX AMSDU size this hardware supports. |
46 | * Unfortunately this means we may get 8 KB here from the |
47 | * kernel... and that is actually what is observed on some |
48 | * systems :( */ |
49 | skb = __dev_alloc_skb(length: len + common->cachelsz - 1, gfp_mask); |
50 | if (skb != NULL) { |
51 | off = ((unsigned long) skb->data) % common->cachelsz; |
52 | if (off != 0) |
53 | skb_reserve(skb, len: common->cachelsz - off); |
54 | } else { |
55 | pr_err("skbuff alloc of size %u failed\n" , len); |
56 | return NULL; |
57 | } |
58 | |
59 | return skb; |
60 | } |
61 | EXPORT_SYMBOL(ath_rxbuf_alloc); |
62 | |
63 | bool ath_is_mybeacon(struct ath_common *common, struct ieee80211_hdr *hdr) |
64 | { |
65 | return ieee80211_is_beacon(fc: hdr->frame_control) && |
66 | !is_zero_ether_addr(addr: common->curbssid) && |
67 | ether_addr_equal_64bits(addr1: hdr->addr3, addr2: common->curbssid); |
68 | } |
69 | EXPORT_SYMBOL(ath_is_mybeacon); |
70 | |
71 | void ath_printk(const char *level, const struct ath_common* common, |
72 | const char *fmt, ...) |
73 | { |
74 | struct va_format vaf; |
75 | va_list args; |
76 | |
77 | va_start(args, fmt); |
78 | |
79 | vaf.fmt = fmt; |
80 | vaf.va = &args; |
81 | |
82 | if (common && common->hw && common->hw->wiphy) { |
83 | printk("%sath: %s: %pV" , |
84 | level, wiphy_name(common->hw->wiphy), &vaf); |
85 | trace_ath_log(wiphy: common->hw->wiphy, vaf: &vaf); |
86 | } else { |
87 | printk("%sath: %pV" , level, &vaf); |
88 | } |
89 | |
90 | va_end(args); |
91 | } |
92 | EXPORT_SYMBOL(ath_printk); |
93 | |
94 | const char *ath_bus_type_strings[] = { |
95 | [ATH_PCI] = "pci" , |
96 | [ATH_AHB] = "ahb" , |
97 | [ATH_USB] = "usb" , |
98 | }; |
99 | EXPORT_SYMBOL(ath_bus_type_strings); |
100 | |