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 #if defined(__FreeBSD__) 30 MODULE_VERSION(athk_common, 1); 31 MODULE_DEPEND(athk_common, linuxkpi, 1, 1, 1); 32 MODULE_DEPEND(athk_common, linuxkpi_wlan, 1, 1, 1); 33 #endif 34 35 struct sk_buff *ath_rxbuf_alloc(struct ath_common *common, 36 u32 len, 37 gfp_t gfp_mask) 38 { 39 struct sk_buff *skb; 40 u32 off; 41 42 /* 43 * Cache-line-align. This is important (for the 44 * 5210 at least) as not doing so causes bogus data 45 * in rx'd frames. 46 */ 47 48 /* Note: the kernel can allocate a value greater than 49 * what we ask it to give us. We really only need 4 KB as that 50 * is this hardware supports and in fact we need at least 3849 51 * as that is the MAX AMSDU size this hardware supports. 52 * Unfortunately this means we may get 8 KB here from the 53 * kernel... and that is actually what is observed on some 54 * systems :( */ 55 skb = __dev_alloc_skb(len + common->cachelsz - 1, gfp_mask); 56 if (skb != NULL) { 57 off = ((unsigned long) skb->data) % common->cachelsz; 58 if (off != 0) 59 skb_reserve(skb, common->cachelsz - off); 60 } else { 61 pr_err("skbuff alloc of size %u failed\n", len); 62 return NULL; 63 } 64 65 return skb; 66 } 67 EXPORT_SYMBOL(ath_rxbuf_alloc); 68 69 bool ath_is_mybeacon(struct ath_common *common, struct ieee80211_hdr *hdr) 70 { 71 return ieee80211_is_beacon(hdr->frame_control) && 72 !is_zero_ether_addr(common->curbssid) && 73 ether_addr_equal_64bits(hdr->addr3, common->curbssid); 74 } 75 EXPORT_SYMBOL(ath_is_mybeacon); 76 77 void ath_printk(const char *level, const struct ath_common* common, 78 const char *fmt, ...) 79 { 80 struct va_format vaf; 81 va_list args; 82 83 va_start(args, fmt); 84 85 vaf.fmt = fmt; 86 vaf.va = &args; 87 88 if (common && common->hw && common->hw->wiphy) { 89 printk("%sath: %s: %pV", 90 level, wiphy_name(common->hw->wiphy), &vaf); 91 trace_ath_log(common->hw->wiphy, &vaf); 92 } else { 93 printk("%sath: %pV", level, &vaf); 94 } 95 96 va_end(args); 97 } 98 EXPORT_SYMBOL(ath_printk); 99 100 const char *ath_bus_type_strings[] = { 101 [ATH_PCI] = "pci", 102 [ATH_AHB] = "ahb", 103 [ATH_USB] = "usb", 104 }; 105 EXPORT_SYMBOL(ath_bus_type_strings); 106