linux/drivers/net/wireless/ath/carl9170/rx.c

/*
 * Atheros CARL9170 driver
 *
 * 802.11 & command trap routines
 *
 * Copyright 2008, Johannes Berg <[email protected]>
 * Copyright 2009, 2010, Christian Lamparter <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, see
 * http://www.gnu.org/licenses/.
 *
 * This file incorporates work covered by the following copyright and
 * permission notice:
 *    Copyright (c) 2007-2008 Atheros Communications, Inc.
 *
 *    Permission to use, copy, modify, and/or distribute this software for any
 *    purpose with or without fee is hereby granted, provided that the above
 *    copyright notice and this permission notice appear in all copies.
 *
 *    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 *    WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 *    MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 *    ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 *    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 *    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 *    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <linux/slab.h>
#include <linux/module.h>
#include <linux/etherdevice.h>
#include <linux/crc32.h>
#include <net/mac80211.h>
#include "carl9170.h"
#include "hw.h"
#include "cmd.h"

static void carl9170_dbg_message(struct ar9170 *ar, const char *buf, u32 len)
{ … }

static void carl9170_handle_ps(struct ar9170 *ar, struct carl9170_rsp *rsp)
{ … }

static int carl9170_check_sequence(struct ar9170 *ar, unsigned int seq)
{ … }

static void carl9170_cmd_callback(struct ar9170 *ar, u32 len, void *buffer)
{ … }

void carl9170_handle_command_response(struct ar9170 *ar, void *buf, u32 len)
{ … }

static int carl9170_rx_mac_status(struct ar9170 *ar,
	struct ar9170_rx_head *head, struct ar9170_rx_macstatus *mac,
	struct ieee80211_rx_status *status)
{ … }

static void carl9170_rx_phy_status(struct ar9170 *ar,
	struct ar9170_rx_phystatus *phy, struct ieee80211_rx_status *status)
{ … }

static struct sk_buff *carl9170_rx_copy_data(u8 *buf, int len)
{ … }

static u8 *carl9170_find_ie(u8 *data, unsigned int len, u8 ie)
{ … }

/*
 * NOTE:
 *
 * The firmware is in charge of waking up the device just before
 * the AP is expected to transmit the next beacon.
 *
 * This leaves the driver with the important task of deciding when
 * to set the PHY back to bed again.
 */
static void carl9170_ps_beacon(struct ar9170 *ar, void *data, unsigned int len)
{ … }

static void carl9170_ba_check(struct ar9170 *ar, void *data, unsigned int len)
{ … }

static bool carl9170_ampdu_check(struct ar9170 *ar, u8 *buf, u8 ms,
				 struct ieee80211_rx_status *rx_status)
{ … }

static int carl9170_handle_mpdu(struct ar9170 *ar, u8 *buf, int len,
				struct ieee80211_rx_status *status)
{ … }

/*
 * If the frame alignment is right (or the kernel has
 * CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS), and there
 * is only a single MPDU in the USB frame, then we could
 * submit to mac80211 the SKB directly. However, since
 * there may be multiple packets in one SKB in stream
 * mode, and we need to observe the proper ordering,
 * this is non-trivial.
 */
static void carl9170_rx_untie_data(struct ar9170 *ar, u8 *buf, int len)
{ … }

static void carl9170_rx_untie_cmds(struct ar9170 *ar, const u8 *respbuf,
				   const unsigned int resplen)
{ … }

static void __carl9170_rx(struct ar9170 *ar, u8 *buf, unsigned int len)
{ … }

static void carl9170_rx_stream(struct ar9170 *ar, void *buf, unsigned int len)
{ … }

void carl9170_rx(struct ar9170 *ar, void *buf, unsigned int len)
{ … }