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 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 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 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