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/export.h> 20 #include <linux/kernel.h> 21 #include <linux/module.h> 22 23 #include "ath.h" 24 #include "trace.h" 25 26 MODULE_AUTHOR("Atheros Communications"); 27 MODULE_DESCRIPTION("Shared library for Atheros wireless LAN cards."); 28 MODULE_LICENSE("Dual BSD/GPL"); 29 30 struct sk_buff *ath_rxbuf_alloc(struct ath_common *common, 31 u32 len, 32 gfp_t gfp_mask) 33 { 34 struct sk_buff *skb; 35 u32 off; 36 37 /* 38 * Cache-line-align. This is important (for the 39 * 5210 at least) as not doing so causes bogus data 40 * in rx'd frames. 41 */ 42 43 /* Note: the kernel can allocate a value greater than 44 * what we ask it to give us. We really only need 4 KB as that 45 * is this hardware supports and in fact we need at least 3849 46 * as that is the MAX AMSDU size this hardware supports. 47 * Unfortunately this means we may get 8 KB here from the 48 * kernel... and that is actually what is observed on some 49 * systems :( */ 50 skb = __dev_alloc_skb(len + common->cachelsz - 1, gfp_mask); 51 if (skb != NULL) { 52 off = ((unsigned long) skb->data) % common->cachelsz; 53 if (off != 0) 54 skb_reserve(skb, common->cachelsz - off); 55 } else { 56 pr_err("skbuff alloc of size %u failed\n", len); 57 return NULL; 58 } 59 60 return skb; 61 } 62 EXPORT_SYMBOL(ath_rxbuf_alloc); 63 64 bool ath_is_mybeacon(struct ath_common *common, struct ieee80211_hdr *hdr) 65 { 66 return ieee80211_is_beacon(hdr->frame_control) && 67 !is_zero_ether_addr(common->curbssid) && 68 ether_addr_equal_64bits(hdr->addr3, common->curbssid); 69 } 70 EXPORT_SYMBOL(ath_is_mybeacon); 71 72 void ath_printk(const char *level, const struct ath_common* common, 73 const char *fmt, ...) 74 { 75 struct va_format vaf; 76 va_list args; 77 78 va_start(args, fmt); 79 80 vaf.fmt = fmt; 81 vaf.va = &args; 82 83 if (common && common->hw && common->hw->wiphy) { 84 printk("%sath: %s: %pV", 85 level, wiphy_name(common->hw->wiphy), &vaf); 86 trace_ath_log(common->hw->wiphy, &vaf); 87 } else { 88 printk("%sath: %pV", level, &vaf); 89 } 90 91 va_end(args); 92 } 93 EXPORT_SYMBOL(ath_printk); 94 95 const char *ath_bus_type_strings[] = { 96 [ATH_PCI] = "pci", 97 [ATH_AHB] = "ahb", 98 [ATH_USB] = "usb", 99 }; 100 EXPORT_SYMBOL(ath_bus_type_strings); 101