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1/*2 * Copyright (c) 2009 Atheros Communications Inc.3 *4 * Permission to use, copy, modify, and/or distribute this software for any5 * purpose with or without fee is hereby granted, provided that the above6 * copyright notice and this permission notice appear in all copies.7 *8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.15 */16 17#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt18 19#include <linux/kernel.h>20#include <linux/module.h>21 22#include "ath.h"23#include "trace.h"24 25MODULE_AUTHOR("Atheros Communications");26MODULE_DESCRIPTION("Shared library for Atheros wireless LAN cards.");27MODULE_LICENSE("Dual BSD/GPL");28 29struct 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 the38 * 5210 at least) as not doing so causes bogus data39 * in rx'd frames.40 */41 42 /* Note: the kernel can allocate a value greater than43 * what we ask it to give us. We really only need 4 KB as that44 * is this hardware supports and in fact we need at least 384945 * as that is the MAX AMSDU size this hardware supports.46 * Unfortunately this means we may get 8 KB here from the47 * kernel... and that is actually what is observed on some48 * systems :( */49 skb = __dev_alloc_skb(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, 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}61EXPORT_SYMBOL(ath_rxbuf_alloc);62 63bool ath_is_mybeacon(struct ath_common *common, struct ieee80211_hdr *hdr)64{65 return ieee80211_is_beacon(hdr->frame_control) &&66 !is_zero_ether_addr(common->curbssid) &&67 ether_addr_equal_64bits(hdr->addr3, common->curbssid);68}69EXPORT_SYMBOL(ath_is_mybeacon);70 71void 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(common->hw->wiphy, &vaf);86 } else {87 printk("%sath: %pV", level, &vaf);88 }89 90 va_end(args);91}92EXPORT_SYMBOL(ath_printk);93 94const char *ath_bus_type_strings[] = {95 [ATH_PCI] = "pci",96 [ATH_AHB] = "ahb",97 [ATH_USB] = "usb",98};99EXPORT_SYMBOL(ath_bus_type_strings);100