recv.c | Explore in Territory

/*
 * Copyright (c) 2008-2011 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/dma-mapping.h>
#include "ath9k.h"
#include "ar9003_mac.h"

#define SKB_CB_ATHBUF(__skb) …

static inline bool ath9k_check_auto_sleep(struct ath_softc *sc)
{ … }

/*
 * Setup and link descriptors.
 *
 * 11N: we can no longer afford to self link the last descriptor.
 * MAC acknowledges BA status as long as it copies frames to host
 * buffer (or rx fifo). This can incorrectly acknowledge packets
 * to a sender if last desc is self-linked.
 */
static void ath_rx_buf_link(struct ath_softc *sc, struct ath_rxbuf *bf,
			    bool flush)
{ … }

static void ath_rx_buf_relink(struct ath_softc *sc, struct ath_rxbuf *bf,
			      bool flush)
{ … }

static void ath_setdefantenna(struct ath_softc *sc, u32 antenna)
{ … }

static void ath_opmode_init(struct ath_softc *sc)
{ … }

static bool ath_rx_edma_buf_link(struct ath_softc *sc,
				 enum ath9k_rx_qtype qtype)
{ … }

static void ath_rx_addbuffer_edma(struct ath_softc *sc,
				  enum ath9k_rx_qtype qtype)
{ … }

static void ath_rx_remove_buffer(struct ath_softc *sc,
				 enum ath9k_rx_qtype qtype)
{ … }

static void ath_rx_edma_cleanup(struct ath_softc *sc)
{ … }

static void ath_rx_edma_init_queue(struct ath_rx_edma *rx_edma, int size)
{ … }

static int ath_rx_edma_init(struct ath_softc *sc, int nbufs)
{ … }

static void ath_edma_start_recv(struct ath_softc *sc)
{ … }

static void ath_edma_stop_recv(struct ath_softc *sc)
{ … }

int ath_rx_init(struct ath_softc *sc, int nbufs)
{ … }

void ath_rx_cleanup(struct ath_softc *sc)
{ … }

/*
 * Calculate the receive filter according to the
 * operating mode and state:
 *
 * o always accept unicast, broadcast, and multicast traffic
 * o maintain current state of phy error reception (the hal
 *   may enable phy error frames for noise immunity work)
 * o probe request frames are accepted only when operating in
 *   hostap, adhoc, or monitor modes
 * o enable promiscuous mode according to the interface state
 * o accept beacons:
 *   - when operating in adhoc mode so the 802.11 layer creates
 *     node table entries for peers,
 *   - when operating in station mode for collecting rssi data when
 *     the station is otherwise quiet, or
 *   - when operating as a repeater so we see repeater-sta beacons
 *   - when scanning
 */

u32 ath_calcrxfilter(struct ath_softc *sc)
{ … }

void ath_startrecv(struct ath_softc *sc)
{ … }

static void ath_flushrecv(struct ath_softc *sc)
{ … }

bool ath_stoprecv(struct ath_softc *sc)
{ … }

static bool ath_beacon_dtim_pending_cab(struct sk_buff *skb)
{ … }

static void ath_rx_ps_beacon(struct ath_softc *sc, struct sk_buff *skb)
{ … }

static void ath_rx_ps(struct ath_softc *sc, struct sk_buff *skb, bool mybeacon)
{ … }

static bool ath_edma_get_buffers(struct ath_softc *sc,
				 enum ath9k_rx_qtype qtype,
				 struct ath_rx_status *rs,
				 struct ath_rxbuf **dest)
{ … }

static struct ath_rxbuf *ath_edma_get_next_rx_buf(struct ath_softc *sc,
						struct ath_rx_status *rs,
						enum ath9k_rx_qtype qtype)
{ … }

static struct ath_rxbuf *ath_get_next_rx_buf(struct ath_softc *sc,
					   struct ath_rx_status *rs)
{ … }

static void ath9k_process_tsf(struct ath_rx_status *rs,
			      struct ieee80211_rx_status *rxs,
			      u64 tsf)
{ … }

/*
 * For Decrypt or Demic errors, we only mark packet status here and always push
 * up the frame up to let mac80211 handle the actual error case, be it no
 * decryption key or real decryption error. This let us keep statistics there.
 */
static int ath9k_rx_skb_preprocess(struct ath_softc *sc,
				   struct sk_buff *skb,
				   struct ath_rx_status *rx_stats,
				   struct ieee80211_rx_status *rx_status,
				   bool *decrypt_error, u64 tsf)
{ … }

/*
 * Run the LNA combining algorithm only in these cases:
 *
 * Standalone WLAN cards with both LNA/Antenna diversity
 * enabled in the EEPROM.
 *
 * WLAN+BT cards which are in the supported card list
 * in ath_pci_id_table and the user has loaded the
 * driver with "bt_ant_diversity" set to true.
 */
static void ath9k_antenna_check(struct ath_softc *sc,
				struct ath_rx_status *rs)
{ … }

static void ath9k_apply_ampdu_details(struct ath_softc *sc,
	struct ath_rx_status *rs, struct ieee80211_rx_status *rxs)
{ … }

static void ath_rx_count_airtime(struct ath_softc *sc,
				 struct ath_rx_status *rs,
				 struct sk_buff *skb)
{ … }

int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp)
{ … }
linux/drivers/net/wireless/ath/ath9k/recv.c
