cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

main.c (2895B)

      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
     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 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	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);