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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 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                 :            : 
      29                 :       3096 : struct sk_buff *ath_rxbuf_alloc(struct ath_common *common,
      30                 :            :                                 u32 len,
      31                 :            :                                 gfp_t gfp_mask)
      32                 :            : {
      33                 :       3096 :         struct sk_buff *skb;
      34                 :       3096 :         u32 off;
      35                 :            : 
      36                 :            :         /*
      37                 :            :          * Cache-line-align.  This is important (for the
      38                 :            :          * 5210 at least) as not doing so causes bogus data
      39                 :            :          * in rx'd frames.
      40                 :            :          */
      41                 :            : 
      42                 :            :         /* Note: the kernel can allocate a value greater than
      43                 :            :          * what we ask it to give us. We really only need 4 KB as that
      44                 :            :          * is this hardware supports and in fact we need at least 3849
      45                 :            :          * as that is the MAX AMSDU size this hardware supports.
      46                 :            :          * Unfortunately this means we may get 8 KB here from the
      47                 :            :          * kernel... and that is actually what is observed on some
      48                 :            :          * systems :( */
      49                 :       3096 :         skb = __dev_alloc_skb(len + common->cachelsz - 1, gfp_mask);
      50         [ +  - ]:       3096 :         if (skb != NULL) {
      51                 :       3096 :                 off = ((unsigned long) skb->data) % common->cachelsz;
      52         [ -  + ]:       3096 :                 if (off != 0)
      53                 :          0 :                         skb_reserve(skb, common->cachelsz - off);
      54                 :            :         } else {
      55                 :          0 :                 pr_err("skbuff alloc of size %u failed\n", len);
      56                 :          0 :                 return NULL;
      57                 :            :         }
      58                 :            : 
      59                 :            :         return skb;
      60                 :            : }
      61                 :            : EXPORT_SYMBOL(ath_rxbuf_alloc);
      62                 :            : 
      63                 :         18 : bool ath_is_mybeacon(struct ath_common *common, struct ieee80211_hdr *hdr)
      64                 :            : {
      65   [ -  +  -  - ]:         18 :         return ieee80211_is_beacon(hdr->frame_control) &&
      66   [ -  +  -  - ]:         18 :                 !is_zero_ether_addr(common->curbssid) &&
      67                 :            :                 ether_addr_equal_64bits(hdr->addr3, common->curbssid);
      68                 :            : }
      69                 :            : EXPORT_SYMBOL(ath_is_mybeacon);
      70                 :            : 
      71                 :         95 : void ath_printk(const char *level, const struct ath_common* common,
      72                 :            :                 const char *fmt, ...)
      73                 :            : {
      74                 :         95 :         struct va_format vaf;
      75                 :         95 :         va_list args;
      76                 :            : 
      77                 :         95 :         va_start(args, fmt);
      78                 :            : 
      79                 :         95 :         vaf.fmt = fmt;
      80                 :         95 :         vaf.va = &args;
      81                 :            : 
      82   [ +  -  +  -  :         95 :         if (common && common->hw && common->hw->wiphy) {
                   +  - ]
      83         [ +  - ]:         95 :                 printk("%sath: %s: %pV",
      84                 :            :                        level, wiphy_name(common->hw->wiphy), &vaf);
      85                 :         95 :                 trace_ath_log(common->hw->wiphy, &vaf);
      86                 :            :         } else {
      87                 :          0 :                 printk("%sath: %pV", level, &vaf);
      88                 :            :         }
      89                 :            : 
      90                 :         95 :         va_end(args);
      91                 :         95 : }
      92                 :            : EXPORT_SYMBOL(ath_printk);
      93                 :            : 
      94                 :            : const char *ath_bus_type_strings[] = {
      95                 :            :         [ATH_PCI] = "pci",
      96                 :            :         [ATH_AHB] = "ahb",
      97                 :            :         [ATH_USB] = "usb",
      98                 :            : };
      99                 :            : EXPORT_SYMBOL(ath_bus_type_strings);