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 #if defined(__FreeBSD__)
29 MODULE_VERSION(athk_common, 1);
30 MODULE_DEPEND(athk_common, linuxkpi, 1, 1, 1);
31 MODULE_DEPEND(athk_common, linuxkpi_wlan, 1, 1, 1);
32 #endif
33
ath_rxbuf_alloc(struct ath_common * common,u32 len,gfp_t gfp_mask)34 struct sk_buff *ath_rxbuf_alloc(struct ath_common *common,
35 u32 len,
36 gfp_t gfp_mask)
37 {
38 struct sk_buff *skb;
39 u32 off;
40
41 /*
42 * Cache-line-align. This is important (for the
43 * 5210 at least) as not doing so causes bogus data
44 * in rx'd frames.
45 */
46
47 /* Note: the kernel can allocate a value greater than
48 * what we ask it to give us. We really only need 4 KB as that
49 * is this hardware supports and in fact we need at least 3849
50 * as that is the MAX AMSDU size this hardware supports.
51 * Unfortunately this means we may get 8 KB here from the
52 * kernel... and that is actually what is observed on some
53 * systems :( */
54 skb = __dev_alloc_skb(len + common->cachelsz - 1, gfp_mask);
55 if (skb != NULL) {
56 off = ((unsigned long) skb->data) % common->cachelsz;
57 if (off != 0)
58 skb_reserve(skb, common->cachelsz - off);
59 } else {
60 pr_err("skbuff alloc of size %u failed\n", len);
61 return NULL;
62 }
63
64 return skb;
65 }
66 EXPORT_SYMBOL(ath_rxbuf_alloc);
67
ath_is_mybeacon(struct ath_common * common,struct ieee80211_hdr * hdr)68 bool ath_is_mybeacon(struct ath_common *common, struct ieee80211_hdr *hdr)
69 {
70 return ieee80211_is_beacon(hdr->frame_control) &&
71 !is_zero_ether_addr(common->curbssid) &&
72 ether_addr_equal_64bits(hdr->addr3, common->curbssid);
73 }
74 EXPORT_SYMBOL(ath_is_mybeacon);
75
ath_printk(const char * level,const struct ath_common * common,const char * fmt,...)76 void ath_printk(const char *level, const struct ath_common* common,
77 const char *fmt, ...)
78 {
79 struct va_format vaf;
80 va_list args;
81
82 va_start(args, fmt);
83
84 vaf.fmt = fmt;
85 vaf.va = &args;
86
87 if (common && common->hw && common->hw->wiphy) {
88 printk("%sath: %s: %pV",
89 level, wiphy_name(common->hw->wiphy), &vaf);
90 trace_ath_log(common->hw->wiphy, &vaf);
91 } else {
92 printk("%sath: %pV", level, &vaf);
93 }
94
95 va_end(args);
96 }
97 EXPORT_SYMBOL(ath_printk);
98
99 const char *ath_bus_type_strings[] = {
100 [ATH_PCI] = "pci",
101 [ATH_AHB] = "ahb",
102 [ATH_USB] = "usb",
103 };
104 EXPORT_SYMBOL(ath_bus_type_strings);
105