Release 4.11 drivers/net/wireless/ath/ath9k/recv.c
/*
* 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) (*((struct ath_rxbuf **)__skb->cb))
static inline bool ath9k_check_auto_sleep(struct ath_softc *sc)
{
return sc->ps_enabled &&
(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Vasanthakumar Thiagarajan | 29 | 100.00% | 1 | 100.00% |
Total | 29 | 100.00% | 1 | 100.00% |
/*
* 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)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ath_desc *ds;
struct sk_buff *skb;
ds = bf->bf_desc;
ds->ds_link = 0; /* link to null */
ds->ds_data = bf->bf_buf_addr;
/* virtual addr of the beginning of the buffer. */
skb = bf->bf_mpdu;
BUG_ON(skb == NULL);
ds->ds_vdata = skb->data;
/*
* setup rx descriptors. The rx_bufsize here tells the hardware
* how much data it can DMA to us and that we are prepared
* to process
*/
ath9k_hw_setuprxdesc(ah, ds,
common->rx_bufsize,
0);
if (sc->rx.rxlink)
*sc->rx.rxlink = bf->bf_daddr;
else if (!flush)
ath9k_hw_putrxbuf(ah, bf->bf_daddr);
sc->rx.rxlink = &ds->ds_link;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Luis R. Rodriguez | 120 | 80.00% | 4 | 44.44% |
Felix Fietkau | 19 | 12.67% | 2 | 22.22% |
Sujith Manoharan | 11 | 7.33% | 3 | 33.33% |
Total | 150 | 100.00% | 9 | 100.00% |
static void ath_rx_buf_relink(struct ath_softc *sc, struct ath_rxbuf *bf,
bool flush)
{
if (sc->rx.buf_hold)
ath_rx_buf_link(sc, sc->rx.buf_hold, flush);
sc->rx.buf_hold = bf;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Felix Fietkau | 48 | 100.00% | 3 | 100.00% |
Total | 48 | 100.00% | 3 | 100.00% |
static void ath_setdefantenna(struct ath_softc *sc, u32 antenna)
{
/* XXX block beacon interrupts */
ath9k_hw_setantenna(sc->sc_ah, antenna);
sc->rx.defant = antenna;
sc->rx.rxotherant = 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Sujith Manoharan | 40 | 100.00% | 2 | 100.00% |
Total | 40 | 100.00% | 2 | 100.00% |
static void ath_opmode_init(struct ath_softc *sc)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
u32 rfilt, mfilt[2];
/* configure rx filter */
rfilt = ath_calcrxfilter(sc);
ath9k_hw_setrxfilter(ah, rfilt);
/* configure bssid mask */
ath_hw_setbssidmask(common);
/* configure operational mode */
ath9k_hw_setopmode(ah);
/* calculate and install multicast filter */
mfilt[0] = mfilt[1] = ~0;
ath9k_hw_setmcastfilter(ah, mfilt[0], mfilt[1]);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Sujith Manoharan | 82 | 87.23% | 2 | 50.00% |
Luis R. Rodriguez | 12 | 12.77% | 2 | 50.00% |
Total | 94 | 100.00% | 4 | 100.00% |
static bool ath_rx_edma_buf_link(struct ath_softc *sc,
enum ath9k_rx_qtype qtype)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_rx_edma *rx_edma;
struct sk_buff *skb;
struct ath_rxbuf *bf;
rx_edma = &sc->rx.rx_edma[qtype];
if (skb_queue_len(&rx_edma->rx_fifo) >= rx_edma->rx_fifo_hwsize)
return false;
bf = list_first_entry(&sc->rx.rxbuf, struct ath_rxbuf, list);
list_del_init(&bf->list);
skb = bf->bf_mpdu;
memset(skb->data, 0, ah->caps.rx_status_len);
dma_sync_single_for_device(sc->dev, bf->bf_buf_addr,
ah->caps.rx_status_len, DMA_TO_DEVICE);
SKB_CB_ATHBUF(skb) = bf;
ath9k_hw_addrxbuf_edma(ah, bf->bf_buf_addr, qtype);
__skb_queue_tail(&rx_edma->rx_fifo, skb);
return true;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Felix Fietkau | 108 | 65.85% | 2 | 28.57% |
Sujith Manoharan | 38 | 23.17% | 3 | 42.86% |
Luis R. Rodriguez | 18 | 10.98% | 2 | 28.57% |
Total | 164 | 100.00% | 7 | 100.00% |
static void ath_rx_addbuffer_edma(struct ath_softc *sc,
enum ath9k_rx_qtype qtype)
{
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ath_rxbuf *bf, *tbf;
if (list_empty(&sc->rx.rxbuf)) {
ath_dbg(common, QUEUE, "No free rx buf available\n");
return;
}
list_for_each_entry_safe(bf, tbf, &sc->rx.rxbuf, list)
if (!ath_rx_edma_buf_link(sc, qtype))
break;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Felix Fietkau | 41 | 51.25% | 2 | 20.00% |
Sujith Manoharan | 17 | 21.25% | 2 | 20.00% |
Mohammed Shafi Shajakhan | 14 | 17.50% | 1 | 10.00% |
Luis R. Rodriguez | 5 | 6.25% | 2 | 20.00% |
Joe Perches | 2 | 2.50% | 2 | 20.00% |
Senthil Balasubramanian | 1 | 1.25% | 1 | 10.00% |
Total | 80 | 100.00% | 10 | 100.00% |
static void ath_rx_remove_buffer(struct ath_softc *sc,
enum ath9k_rx_qtype qtype)
{
struct ath_rxbuf *bf;
struct ath_rx_edma *rx_edma;
struct sk_buff *skb;
rx_edma = &sc->rx.rx_edma[qtype];
while ((skb = __skb_dequeue(&rx_edma->rx_fifo)) != NULL) {
bf = SKB_CB_ATHBUF(skb);
BUG_ON(!bf);
list_add_tail(&bf->list, &sc->rx.rxbuf);
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Felix Fietkau | 60 | 68.18% | 2 | 25.00% |
Luis R. Rodriguez | 18 | 20.45% | 2 | 25.00% |
Sujith Manoharan | 9 | 10.23% | 3 | 37.50% |
Gabor Juhos | 1 | 1.14% | 1 | 12.50% |
Total | 88 | 100.00% | 8 | 100.00% |
static void ath_rx_edma_cleanup(struct ath_softc *sc)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ath_rxbuf *bf;
ath_rx_remove_buffer(sc, ATH9K_RX_QUEUE_LP);
ath_rx_remove_buffer(sc, ATH9K_RX_QUEUE_HP);
list_for_each_entry(bf, &sc->rx.rxbuf, list) {
if (bf->bf_mpdu) {
dma_unmap_single(sc->dev, bf->bf_buf_addr,
common->rx_bufsize,
DMA_BIDIRECTIONAL);
dev_kfree_skb_any(bf->bf_mpdu);
bf->bf_buf_addr = 0;
bf->bf_mpdu = NULL;
}
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Mohammed Shafi Shajakhan | 50 | 48.54% | 1 | 14.29% |
Felix Fietkau | 21 | 20.39% | 2 | 28.57% |
Luis R. Rodriguez | 19 | 18.45% | 2 | 28.57% |
Sujith Manoharan | 13 | 12.62% | 2 | 28.57% |
Total | 103 | 100.00% | 7 | 100.00% |
static void ath_rx_edma_init_queue(struct ath_rx_edma *rx_edma, int size)
{
__skb_queue_head_init(&rx_edma->rx_fifo);
rx_edma->rx_fifo_hwsize = size;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Felix Fietkau | 19 | 67.86% | 1 | 33.33% |
Luis R. Rodriguez | 8 | 28.57% | 1 | 33.33% |
Sujith Manoharan | 1 | 3.57% | 1 | 33.33% |
Total | 28 | 100.00% | 3 | 100.00% |
static int ath_rx_edma_init(struct ath_softc *sc, int nbufs)
{
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ath_hw *ah = sc->sc_ah;
struct sk_buff *skb;
struct ath_rxbuf *bf;
int error = 0, i;
u32 size;
ath9k_hw_set_rx_bufsize(ah, common->rx_bufsize -
ah->caps.rx_status_len);
ath_rx_edma_init_queue(&sc->rx.rx_edma[ATH9K_RX_QUEUE_LP],
ah->caps.rx_lp_qdepth);
ath_rx_edma_init_queue(&sc->rx.rx_edma[ATH9K_RX_QUEUE_HP],
ah->caps.rx_hp_qdepth);
size = sizeof(struct ath_rxbuf) * nbufs;
bf = devm_kzalloc(sc->dev, size, GFP_KERNEL);
if (!bf)
return -ENOMEM;
INIT_LIST_HEAD(&sc->rx.rxbuf);
for (i = 0; i < nbufs; i++, bf++) {
skb = ath_rxbuf_alloc(common, common->rx_bufsize, GFP_KERNEL);
if (!skb) {
error = -ENOMEM;
goto rx_init_fail;
}
memset(skb->data, 0, common->rx_bufsize);
bf->bf_mpdu = skb;
bf->bf_buf_addr = dma_map_single(sc->dev, skb->data,
common->rx_bufsize,
DMA_BIDIRECTIONAL);
if (unlikely(dma_mapping_error(sc->dev,
bf->bf_buf_addr))) {
dev_kfree_skb_any(skb);
bf->bf_mpdu = NULL;
bf->bf_buf_addr = 0;
ath_err(common,
"dma_mapping_error() on RX init\n");
error = -ENOMEM;
goto rx_init_fail;
}
list_add_tail(&bf->list, &sc->rx.rxbuf);
}
return 0;
rx_init_fail:
ath_rx_edma_cleanup(sc);
return error;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Felix Fietkau | 307 | 97.77% | 3 | 60.00% |
Ben Greear | 6 | 1.91% | 1 | 20.00% |
Joe Perches | 1 | 0.32% | 1 | 20.00% |
Total | 314 | 100.00% | 5 | 100.00% |
static void ath_edma_start_recv(struct ath_softc *sc)
{
ath9k_hw_rxena(sc->sc_ah);
ath_rx_addbuffer_edma(sc, ATH9K_RX_QUEUE_HP);
ath_rx_addbuffer_edma(sc, ATH9K_RX_QUEUE_LP);
ath_opmode_init(sc);
ath9k_hw_startpcureceive(sc->sc_ah, sc->cur_chan->offchannel);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Felix Fietkau | 46 | 92.00% | 2 | 50.00% |
Luis R. Rodriguez | 3 | 6.00% | 1 | 25.00% |
Sujith Manoharan | 1 | 2.00% | 1 | 25.00% |
Total | 50 | 100.00% | 4 | 100.00% |
static void ath_edma_stop_recv(struct ath_softc *sc)
{
ath_rx_remove_buffer(sc, ATH9K_RX_QUEUE_HP);
ath_rx_remove_buffer(sc, ATH9K_RX_QUEUE_LP);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Felix Fietkau | 25 | 100.00% | 1 | 100.00% |
Total | 25 | 100.00% | 1 | 100.00% |
int ath_rx_init(struct ath_softc *sc, int nbufs)
{
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct sk_buff *skb;
struct ath_rxbuf *bf;
int error = 0;
spin_lock_init(&sc->sc_pcu_lock);
common->rx_bufsize = IEEE80211_MAX_MPDU_LEN / 2 +
sc->sc_ah->caps.rx_status_len;
if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
return ath_rx_edma_init(sc, nbufs);
ath_dbg(common, CONFIG, "cachelsz %u rxbufsize %u\n",
common->cachelsz, common->rx_bufsize);
/* Initialize rx descriptors */
error = ath_descdma_setup(sc, &sc->rx.rxdma, &sc->rx.rxbuf,
"rx", nbufs, 1, 0);
if (error != 0) {
ath_err(common,
"failed to allocate rx descriptors: %d\n",
error);
goto err;
}
list_for_each_entry(bf, &sc->rx.rxbuf, list) {
skb = ath_rxbuf_alloc(common, common->rx_bufsize,
GFP_KERNEL);
if (skb == NULL) {
error = -ENOMEM;
goto err;
}
bf->bf_mpdu = skb;
bf->bf_buf_addr = dma_map_single(sc->dev, skb->data,
common->rx_bufsize,
DMA_FROM_DEVICE);
if (unlikely(dma_mapping_error(sc->dev,
bf->bf_buf_addr))) {
dev_kfree_skb_any(skb);
bf->bf_mpdu = NULL;
bf->bf_buf_addr = 0;
ath_err(common,
"dma_mapping_error() on RX init\n");
error = -ENOMEM;
goto err;
}
}
sc->rx.rxlink = NULL;
err:
if (error)
ath_rx_cleanup(sc);
return error;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Felix Fietkau | 276 | 95.50% | 3 | 33.33% |
Ben Greear | 6 | 2.08% | 1 | 11.11% |
Joe Perches | 4 | 1.38% | 3 | 33.33% |
Vasanthakumar Thiagarajan | 2 | 0.69% | 1 | 11.11% |
Luis R. Rodriguez | 1 | 0.35% | 1 | 11.11% |
Total | 289 | 100.00% | 9 | 100.00% |
void ath_rx_cleanup(struct ath_softc *sc)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct sk_buff *skb;
struct ath_rxbuf *bf;
if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
ath_rx_edma_cleanup(sc);
return;
}
list_for_each_entry(bf, &sc->rx.rxbuf, list) {
skb = bf->bf_mpdu;
if (skb) {
dma_unmap_single(sc->dev, bf->bf_buf_addr,
common->rx_bufsize,
DMA_FROM_DEVICE);
dev_kfree_skb(skb);
bf->bf_buf_addr = 0;
bf->bf_mpdu = NULL;
}
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Felix Fietkau | 103 | 89.57% | 2 | 66.67% |
Ben Greear | 12 | 10.43% | 1 | 33.33% |
Total | 115 | 100.00% | 3 | 100.00% |
/*
* 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)
{
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
u32 rfilt;
if (IS_ENABLED(CONFIG_ATH9K_TX99))
return 0;
rfilt = ATH9K_RX_FILTER_UCAST | ATH9K_RX_FILTER_BCAST
| ATH9K_RX_FILTER_MCAST;
/* if operating on a DFS channel, enable radar pulse detection */
if (sc->hw->conf.radar_enabled)
rfilt |= ATH9K_RX_FILTER_PHYRADAR | ATH9K_RX_FILTER_PHYERR;
spin_lock_bh(&sc->chan_lock);
if (sc->cur_chan->rxfilter & FIF_PROBE_REQ)
rfilt |= ATH9K_RX_FILTER_PROBEREQ;
if (sc->sc_ah->is_monitoring)
rfilt |= ATH9K_RX_FILTER_PROM;
if ((sc->cur_chan->rxfilter & FIF_CONTROL) ||
sc->sc_ah->dynack.enabled)
rfilt |= ATH9K_RX_FILTER_CONTROL;
if ((sc->sc_ah->opmode == NL80211_IFTYPE_STATION) &&
(sc->cur_chan->nvifs <= 1) &&
!(sc->cur_chan->rxfilter & FIF_BCN_PRBRESP_PROMISC))
rfilt |= ATH9K_RX_FILTER_MYBEACON;
else if (sc->sc_ah->opmode != NL80211_IFTYPE_OCB)
rfilt |= ATH9K_RX_FILTER_BEACON;
if ((sc->sc_ah->opmode == NL80211_IFTYPE_AP) ||
(sc->cur_chan->rxfilter & FIF_PSPOLL))
rfilt |= ATH9K_RX_FILTER_PSPOLL;
if (sc->cur_chandef.width != NL80211_CHAN_WIDTH_20_NOHT)
rfilt |= ATH9K_RX_FILTER_COMP_BAR;
if (sc->cur_chan->nvifs > 1 || (sc->cur_chan->rxfilter & FIF_OTHER_BSS)) {
/* This is needed for older chips */
if (sc->sc_ah->hw_version.macVersion <= AR_SREV_VERSION_9160)
rfilt |= ATH9K_RX_FILTER_PROM;
rfilt |= ATH9K_RX_FILTER_MCAST_BCAST_ALL;
}
if (AR_SREV_9550(sc->sc_ah) || AR_SREV_9531(sc->sc_ah) ||
AR_SREV_9561(sc->sc_ah))
rfilt |= ATH9K_RX_FILTER_4ADDRESS;
if (AR_SREV_9462(sc->sc_ah) || AR_SREV_9565(sc->sc_ah))
rfilt |= ATH9K_RX_FILTER_CONTROL_WRAPPER;
if (ath9k_is_chanctx_enabled() &&
test_bit(ATH_OP_SCANNING, &common->op_flags))
rfilt |= ATH9K_RX_FILTER_BEACON;
spin_unlock_bh(&sc->chan_lock);
return rfilt;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Felix Fietkau | 172 | 52.12% | 3 | 13.64% |
Sujith Manoharan | 46 | 13.94% | 6 | 27.27% |
Miaoqing Pan | 27 | 8.18% | 2 | 9.09% |
Zefir Kurtisi | 17 | 5.15% | 1 | 4.55% |
Ben Greear | 15 | 4.55% | 1 | 4.55% |
Gabor Juhos | 13 | 3.94% | 1 | 4.55% |
Luis R. Rodriguez | 12 | 3.64% | 2 | 9.09% |
Jan Kaisrlik | 11 | 3.33% | 1 | 4.55% |
Lorenzo Bianconi | 10 | 3.03% | 1 | 4.55% |
Jouni Malinen | 3 | 0.91% | 1 | 4.55% |
Thomas Wagner | 2 | 0.61% | 1 | 4.55% |
Rajkumar Manoharan | 1 | 0.30% | 1 | 4.55% |
Masahiro Yamada | 1 | 0.30% | 1 | 4.55% |
Total | 330 | 100.00% | 22 | 100.00% |
void ath_startrecv(struct ath_softc *sc)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_rxbuf *bf, *tbf;
if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
ath_edma_start_recv(sc);
return;
}
if (list_empty(&sc->rx.rxbuf))
goto start_recv;
sc->rx.buf_hold = NULL;
sc->rx.rxlink = NULL;
list_for_each_entry_safe(bf, tbf, &sc->rx.rxbuf, list) {
ath_rx_buf_link(sc, bf, false);
}
/* We could have deleted elements so the list may be empty now */
if (list_empty(&sc->rx.rxbuf))
goto start_recv;
bf = list_first_entry(&sc->rx.rxbuf, struct ath_rxbuf, list);
ath9k_hw_putrxbuf(ah, bf->bf_daddr);
ath9k_hw_rxena(ah);
start_recv:
ath_opmode_init(sc);
ath9k_hw_startpcureceive(ah, sc->cur_chan->offchannel);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Felix Fietkau | 156 | 96.30% | 5 | 62.50% |
Sujith Manoharan | 3 | 1.85% | 2 | 25.00% |
Luis R. Rodriguez | 3 | 1.85% | 1 | 12.50% |
Total | 162 | 100.00% | 8 | 100.00% |
static void ath_flushrecv(struct ath_softc *sc)
{
if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
ath_rx_tasklet(sc, 1, true);
ath_rx_tasklet(sc, 1, false);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Felix Fietkau | 36 | 87.80% | 2 | 66.67% |
Luis R. Rodriguez | 5 | 12.20% | 1 | 33.33% |
Total | 41 | 100.00% | 3 | 100.00% |
bool ath_stoprecv(struct ath_softc *sc)
{
struct ath_hw *ah = sc->sc_ah;
bool stopped, reset = false;
ath9k_hw_abortpcurecv(ah);
ath9k_hw_setrxfilter(ah, 0);
stopped = ath9k_hw_stopdmarecv(ah, &reset);
ath_flushrecv(sc);
if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
ath_edma_stop_recv(sc);
else
sc->rx.rxlink = NULL;
if (!(ah->ah_flags & AH_UNPLUGGED) &&
unlikely(!stopped)) {
ath_dbg(ath9k_hw_common(sc->sc_ah), RESET,
"Failed to stop Rx DMA\n");
RESET_STAT_INC(sc, RESET_RX_DMA_ERROR);
}
return stopped && !reset;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Felix Fietkau | 92 | 73.60% | 6 | 60.00% |
Ben Greear | 17 | 13.60% | 1 | 10.00% |
Rajkumar Manoharan | 9 | 7.20% | 1 | 10.00% |
Luis R. Rodriguez | 7 | 5.60% | 2 | 20.00% |
Total | 125 | 100.00% | 10 | 100.00% |
static bool ath_beacon_dtim_pending_cab(struct sk_buff *skb)
{
/* Check whether the Beacon frame has DTIM indicating buffered bc/mc */
struct ieee80211_mgmt *mgmt;
u8 *pos, *end, id, elen;
struct ieee80211_tim_ie *tim;
mgmt = (struct ieee80211_mgmt *)skb->data;
pos = mgmt->u.beacon.variable;
end = skb->data + skb->len;
while (pos + 2 < end) {
id = *pos++;
elen = *pos++;
if (pos + elen > end)
break;
if (id == WLAN_EID_TIM) {
if (elen < sizeof(*tim))
break;
tim = (struct ieee80211_tim_ie *) pos;
if (tim->dtim_count != 0)
break;
return tim->bitmap_ctrl & 0x01;
}
pos += elen;
}
return false;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Felix Fietkau | 116 | 79.45% | 1 | 12.50% |
Sujith Manoharan | 13 | 8.90% | 3 | 37.50% |
Luis R. Rodriguez | 7 | 4.79% | 1 | 12.50% |
Senthil Balasubramanian | 4 | 2.74% | 1 | 12.50% |
Jouni Malinen | 4 | 2.74% | 1 | 12.50% |
Javier Cardona | 2 | 1.37% | 1 | 12.50% |
Total | 146 | 100.00% | 8 | 100.00% |
static void ath_rx_ps_beacon(struct ath_softc *sc, struct sk_buff *skb)
{
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
bool skip_beacon = false;
if (skb->len < 24 + 8 + 2 + 2)
return;
sc->ps_flags &= ~PS_WAIT_FOR_BEACON;
if (sc->ps_flags & PS_BEACON_SYNC) {
sc->ps_flags &= ~PS_BEACON_SYNC;
ath_dbg(common, PS,
"Reconfigure beacon timers based on synchronized timestamp\n");
#ifdef CONFIG_ATH9K_CHANNEL_CONTEXT
if (ath9k_is_chanctx_enabled()) {
if (sc->cur_chan == &sc->offchannel.chan)
skip_beacon = true;
}
#endif
if (!skip_beacon &&
!(WARN_ON_ONCE(sc->cur_chan->beacon.beacon_interval == 0)))
ath9k_set_beacon(sc);
ath9k_p2p_beacon_sync(sc);
}
if (ath_beacon_dtim_pending_cab(skb)) {
/*
* Remain awake waiting for buffered broadcast/multicast
* frames. If the last broadcast/multicast frame is not
* received properly, the next beacon frame will work as
* a backup trigger for returning into NETWORK SLEEP state,
* so we are waiting for it as well.
*/
ath_dbg(common, PS,
"Received DTIM beacon indicating buffered broadcast/multicast frame(s)\n");
sc->ps_flags |= PS_WAIT_FOR_CAB | PS_WAIT_FOR_BEACON;
return;
}
if (sc->ps_flags & PS_WAIT_FOR_CAB) {
/*
* This can happen if a broadcast frame is dropped or the AP
* fails to send a frame indicating that all CAB frames have
* been delivered.
*/
sc->ps_flags &= ~PS_WAIT_FOR_CAB;
ath_dbg(common, PS, "PS wait for CAB frames timed out\n");
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Felix Fietkau | 80 | 40.82% | 2 | 14.29% |
Sujith Manoharan | 50 | 25.51% | 7 | 50.00% |
Luis R. Rodriguez | 41 | 20.92% | 1 | 7.14% |
Ben Greear | 15 | 7.65% | 1 | 7.14% |
Joe Perches | 7 | 3.57% | 2 | 14.29% |
Rajkumar Manoharan | 3 | 1.53% | 1 | 7.14% |
Total | 196 | 100.00% | 14 | 100.00% |
static void ath_rx_ps(struct ath_softc *sc, struct sk_buff *skb, bool mybeacon)
{
struct ieee80211_hdr *hdr;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
hdr = (struct ieee80211_hdr *)skb->data;
/* Process Beacon and CAB receive in PS state */
if (((sc->ps_flags & PS_WAIT_FOR_BEACON) || ath9k_check_auto_sleep(sc))
&& mybeacon) {
ath_rx_ps_beacon(sc, skb);
} else if ((sc->ps_flags & PS_WAIT_FOR_CAB) &&
(ieee80211_is_data(hdr->frame_control) ||
ieee80211_is_action(hdr->frame_control)) &&
is_multicast_ether_addr(hdr->addr1) &&
!ieee80211_has_moredata(hdr->frame_control)) {
/*
* No more broadcast/multicast frames to be received at this
* point.
*/
sc->ps_flags &= ~(PS_WAIT_FOR_CAB | PS_WAIT_FOR_BEACON);
ath_dbg(common, PS,
"All PS CAB frames received, back to sleep\n");
} else if ((sc->ps_flags & PS_WAIT_FOR_PSPOLL_DATA) &&
!is_multicast_ether_addr(hdr->addr1) &&
!ieee80211_has_morefrags(hdr->frame_control)) {
sc->ps_flags &= ~PS_WAIT_FOR_PSPOLL_DATA;
ath_dbg(common, PS,
"Going back to sleep after having received PS-Poll data (0x%lx)\n",
sc->ps_flags & (PS_WAIT_FOR_BEACON |
PS_WAIT_FOR_CAB |
PS_WAIT_FOR_PSPOLL_DATA |
PS_WAIT_FOR_TX_ACK));
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Felix Fietkau | 136 | 68.00% | 1 | 11.11% |
Luis R. Rodriguez | 36 | 18.00% | 1 | 11.11% |
Sujith Manoharan | 8 | 4.00% | 2 | 22.22% |
Vasanthakumar Thiagarajan | 7 | 3.50% | 1 | 11.11% |
Joe Perches | 5 | 2.50% | 2 | 22.22% |
Rajkumar Manoharan | 4 | 2.00% | 1 | 11.11% |
Senthil Balasubramanian | 4 | 2.00% | 1 | 11.11% |
Total | 200 | 100.00% | 9 | 100.00% |
static bool ath_edma_get_buffers(struct ath_softc *sc,
enum ath9k_rx_qtype qtype,
struct ath_rx_status *rs,
struct ath_rxbuf **dest)
{
struct ath_rx_edma *rx_edma = &sc->rx.rx_edma[qtype];
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct sk_buff *skb;
struct ath_rxbuf *bf;
int ret;
skb = skb_peek(&rx_edma->rx_fifo);
if (!skb)
return false;
bf = SKB_CB_ATHBUF(skb);
BUG_ON(!bf);
dma_sync_single_for_cpu(sc->dev, bf->bf_buf_addr,
common->rx_bufsize, DMA_FROM_DEVICE);
ret = ath9k_hw_process_rxdesc_edma(ah, rs, skb->data);
if (ret == -EINPROGRESS) {
/*let device gain the buffer again*/
dma_sync_single_for_device(sc->dev, bf->bf_buf_addr,
common->rx_bufsize, DMA_FROM_DEVICE);
return false;
}
__skb_unlink(skb, &rx_edma->rx_fifo);
if (ret == -EINVAL) {
/* corrupt descriptor, skip this one and the following one */
list_add_tail(&bf->list, &sc->rx.rxbuf);
ath_rx_edma_buf_link(sc, qtype);
skb = skb_peek(&rx_edma->rx_fifo);
if (skb) {
bf = SKB_CB_ATHBUF(skb);
BUG_ON(!bf);
__skb_unlink(skb, &rx_edma->rx_fifo);
list_add_tail(&bf->list, &sc->rx.rxbuf);
ath_rx_edma_buf_link(sc, qtype);
}
bf = NULL;
}
*dest = bf;
return true;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Felix Fietkau | 186 | 66.67% | 3 | 37.50% |
Jouni Malinen | 58 | 20.79% | 2 | 25.00% |
Lei Ming | 21 | 7.53% | 1 | 12.50% |
Luis R. Rodriguez | 9 | 3.23% | 1 | 12.50% |
Gabor Juhos | 5 | 1.79% | 1 | 12.50% |
Total | 279 | 100.00% | 8 | 100.00% |
static struct ath_rxbuf *ath_edma_get_next_rx_buf(struct ath_softc *sc,
struct ath_rx_status *rs,
enum ath9k_rx_qtype qtype)
{
struct ath_rxbuf *bf = NULL;
while (ath_edma_get_buffers(sc, qtype, rs, &bf)) {
if (!bf)
continue;
return bf;
}
return NULL;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Felix Fietkau | 36 | 63.16% | 3 | 60.00% |
Jouni Malinen | 21 | 36.84% | 2 | 40.00% |
Total | 57 | 100.00% | 5 | 100.00% |
static struct ath_rxbuf *ath_get_next_rx_buf(struct ath_softc *sc,
struct ath_rx_status *rs)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ath_desc *ds;
struct ath_rxbuf *bf;
int ret;
if (list_empty(&sc->rx.rxbuf)) {
sc->rx.rxlink = NULL;
return NULL;
}
bf = list_first_entry(&sc->rx.rxbuf, struct ath_rxbuf, list);
if (bf == sc->rx.buf_hold)
return NULL;
ds = bf->bf_desc;
/*
* Must provide the virtual address of the current
* descriptor, the physical address, and the virtual
* address of the next descriptor in the h/w chain.
* This allows the HAL to look ahead to see if the
* hardware is done with a descriptor by checking the
* done bit in the following descriptor and the address
* of the current descriptor the DMA engine is working
* on. All this is necessary because of our use of
* a self-linked list to avoid rx overruns.
*/
ret = ath9k_hw_rxprocdesc(ah, ds, rs);
if (ret == -EINPROGRESS) {
struct ath_rx_status trs;
struct ath_rxbuf *tbf;
struct ath_desc *tds;
memset(&trs, 0, sizeof(trs));
if (list_is_last(&bf->list, &sc->rx.rxbuf)) {
sc->rx.rxlink = NULL;
return NULL;
}
tbf = list_entry(bf->list.next, struct ath_rxbuf, list);
/*
* On some hardware the descriptor status words could
* get corrupted, including the done bit. Because of
* this, check if the next descriptor's done bit is
* set or not.
*
* If the next descriptor's done bit is set, the current
* descriptor has been corrupted. Force s/w to discard
* this descriptor and continue...
*/
tds = tbf->bf_desc;
ret = ath9k_hw_rxprocdesc(ah, tds, &trs);
if (ret == -EINPROGRESS)
return NULL;
/*
* Re-check previous descriptor, in case it has been filled
* in the mean time.
*/
ret = ath9k_hw_rxprocdesc(ah, ds, rs);
if (ret == -EINPROGRESS) {
/*
* mark descriptor as zero-length and set the 'more'
* flag to ensure that both buffers get discarded
*/
rs->rs_datalen = 0;
rs->rs_more = true;
}
}
list_del(&bf->list);
if (!bf->bf_mpdu)
return bf;
/*
* Synchronize the DMA transfer with CPU before
* 1. accessing the frame
* 2. requeueing the same buffer to h/w
*/
dma_sync_single_for_cpu(sc->dev, bf->bf_buf_addr,
common->rx_bufsize,
DMA_FROM_DEVICE);
return bf;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Felix Fietkau | 251 | 81.76% | 6 | 60.00% |
Jouni Malinen | 50 | 16.29% | 1 | 10.00% |
Johannes Berg | 3 | 0.98% | 1 | 10.00% |
Luis R. Rodriguez | 2 | 0.65% | 1 | 10.00% |
Lei Ming | 1 | 0.33% | 1 | 10.00% |
Total | 307 | 100.00% | 10 | 100.00% |
static void ath9k_process_tsf(struct ath_rx_status *rs,
struct ieee80211_rx_status *rxs,
u64 tsf)
{
u32 tsf_lower = tsf & 0xffffffff;
rxs->mactime = (tsf & ~0xffffffffULL) | rs->rs_tstamp;
if (rs->rs_tstamp > tsf_lower &&
unlikely(rs->rs_tstamp - tsf_lower > 0x10000000))
rxs->mactime -= 0x100000000ULL;
if (rs->rs_tstamp < tsf_lower &&
unlikely(tsf_lower - rs->rs_tstamp > 0x10000000))
rxs->mactime += 0x100000000ULL;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Sujith Manoharan | 91 | 100.00% | 1 | 100.00% |
Total | 91 | 100.00% | 1 | 100.00% |
/*
* 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)
{
struct ieee80211_hw *hw = sc->hw;
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ieee80211_hdr *hdr;
bool discard_current = sc->rx.discard_next;
/*
* Discard corrupt descriptors which are marked in
* ath_get_next_rx_buf().
*/
if (discard_current)
goto corrupt;
sc->rx.discard_next = false;
/*
* Discard zero-length packets.
*/
if (!rx_stats->rs_datalen) {
RX_STAT_INC(rx_len_err);
goto corrupt;
}
/*
* rs_status follows rs_datalen so if rs_datalen is too large
* we can take a hint that hardware corrupted it, so ignore
* those frames.
*/
if (rx_stats->rs_datalen > (common->rx_bufsize - ah->caps.rx_status_len)) {
RX_STAT_INC(rx_len_err);
goto corrupt;
}
/* Only use status info from the last fragment */
if (rx_stats->rs_more)
return 0;
/*
* Return immediately if the RX descriptor has been marked
* as corrupt based on the various error bits.
*
* This is different from the other corrupt descriptor
* condition handled above.
*/
if (rx_stats->rs_status & ATH9K_RXERR_CORRUPT_DESC)
goto corrupt;
hdr = (struct ieee80211_hdr *) (skb->data + ah->caps.rx_status_len);
ath9k_process_tsf(rx_stats, rx_status, tsf);
ath_debug_stat_rx(sc, rx_stats);
/*
* Process PHY errors and return so that the packet
* can be dropped.
*/
if (rx_stats->rs_status & ATH9K_RXERR_PHY) {
/*
* DFS and spectral are mutually exclusive
*
* Since some chips use PHYERR_RADAR as indication for both, we
* need to double check which feature is enabled to prevent
* feeding spectral or dfs-detector with wrong frames.
*/
if (hw->conf.radar_enabled) {
ath9k_dfs_process_phyerr(sc, hdr, rx_stats,
rx_status->mactime);
} else if (sc->spec_priv.spectral_mode != SPECTRAL_DISABLED &&
ath_cmn_process_fft(&sc->spec_priv, hdr, rx_stats,
rx_status->mactime)) {
RX_STAT_INC(rx_spectral);
}
return -EINVAL;
}
/*
* everything but the rate is checked here, the rate check is done
* separately to avoid doing two lookups for a rate for each frame.
*/
spin_lock_bh(&sc->chan_lock);
if (!ath9k_cmn_rx_accept(common, hdr, rx_status, rx_stats, decrypt_error,
sc->cur_chan->rxfilter)) {
spin_unlock_bh(&sc->chan_lock);
return -EINVAL;
}
spin_unlock_bh(&sc->chan_lock);
if (ath_is_mybeacon(common, hdr)) {
RX_STAT_INC(rx_beacons);
rx_stats->is_mybeacon = true;
}
/*
* This shouldn't happen, but have a safety check anyway.
*/
if (WARN_ON(!ah->curchan))
return -EINVAL;
if (ath9k_cmn_process_rate(common, hw, rx_stats, rx_status)) {
/*
* No valid hardware bitrate found -- we should not get here
* because hardware has already validated this frame as OK.
*/
ath_dbg(common, ANY, "unsupported hw bitrate detected 0x%02x using 1 Mbit\n",
rx_stats->rs_rate);
RX_STAT_INC(rx_rate_err);
return -EINVAL;
}
if (ath9k_is_chanctx_enabled()) {
if (rx_stats->is_mybeacon)
ath_chanctx_beacon_recv_ev(sc,
ATH_CHANCTX_EVENT_BEACON_RECEIVED);
}
ath9k_cmn_process_rssi(common, hw, rx_stats, rx_status);
rx_status->band = ah->curchan->chan->band;
rx_status->freq = ah->curchan->chan->center_freq;
rx_status->antenna = rx_stats->rs_antenna;
rx_status->flag |= RX_FLAG_MACTIME_END;
#ifdef CONFIG_ATH9K_BTCOEX_SUPPORT
if (ieee80211_is_data_present(hdr->frame_control) &&
!ieee80211_is_qos_nullfunc(hdr->frame_control))
sc->rx.num_pkts++;
#endif
return 0;
corrupt:
sc->rx.discard_next = rx_stats->rs_more;
return -EINVAL;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Sujith Manoharan | 379 | 73.88% | 12 | 54.55% |
Oleksij Rempel | 47 | 9.16% | 6 | 27.27% |
Felix Fietkau | 44 | 8.58% | 2 | 9.09% |
Zefir Kurtisi | 22 | 4.29% | 1 | 4.55% |
Simon Wunderlich | 21 | 4.09% | 1 | 4.55% |
Total | 513 | 100.00% | 22 | 100.00% |
/*
* 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)
{
struct ath_hw *ah = sc->sc_ah;
struct ath9k_hw_capabilities *pCap = &ah->caps;
struct ath_common *common = ath9k_hw_common(ah);
if (!(ah->caps.hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB))
return;
/*
* Change the default rx antenna if rx diversity
* chooses the other antenna 3 times in a row.
*/
if (sc->rx.defant != rs->rs_antenna) {
if (++sc->rx.rxotherant >= 3)
ath_setdefantenna(sc, rs->rs_antenna);
} else {
sc->rx.rxotherant = 0;
}
if (pCap->hw_caps & ATH9K_HW_CAP_BT_ANT_DIV) {
if (common->bt_ant_diversity)
ath_ant_comb_scan(sc, rs);
} else {
ath_ant_comb_scan(sc, rs);
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Sujith Manoharan | 138 | 100.00% | 1 | 100.00% |
Total | 138 | 100.00% | 1 | 100.00% |
static void ath9k_apply_ampdu_details(struct ath_softc *sc,
struct ath_rx_status *rs, struct ieee80211_rx_status *rxs)
{
if (rs->rs_isaggr) {
rxs->flag |= RX_FLAG_AMPDU_DETAILS | RX_FLAG_AMPDU_LAST_KNOWN;
rxs->ampdu_reference = sc->rx.ampdu_ref;
if (!rs->rs_moreaggr) {
rxs->flag |= RX_FLAG_AMPDU_IS_LAST;
sc->rx.ampdu_ref++;
}
if (rs->rs_flags & ATH9K_RX_DELIM_CRC_PRE)
rxs->flag |= RX_FLAG_AMPDU_DELIM_CRC_ERROR;
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Christian Lamparter | 83 | 100.00% | 1 | 100.00% |
Total | 83 | 100.00% | 1 | 100.00% |
static void ath_rx_count_airtime(struct ath_softc *sc,
struct ath_rx_status *rs,
struct sk_buff *skb)
{
struct ath_node *an;
struct ath_acq *acq;
struct ath_vif *avp;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ieee80211_sta *sta;
struct ieee80211_rx_status *rxs;
const struct ieee80211_rate *rate;
bool is_sgi, is_40, is_sp;
int phy;
u16 len = rs->rs_datalen;
u32 airtime = 0;
u8 tidno, acno;
if (!ieee80211_is_data(hdr->frame_control))
return;
rcu_read_lock();
sta = ieee80211_find_sta_by_ifaddr(sc->hw, hdr->addr2, NULL);
if (!sta)
goto exit;
an = (struct ath_node *) sta->drv_priv;
avp = (struct ath_vif *) an->vif->drv_priv;
tidno = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
acno = TID_TO_WME_AC(tidno);
acq = &avp->chanctx->acq[acno];
rxs = IEEE80211_SKB_RXCB(skb);
is_sgi = !!(rxs->flag & RX_FLAG_SHORT_GI);
is_40 = !!(rxs->flag & RX_FLAG_40MHZ);
is_sp = !!(rxs->flag & RX_FLAG_SHORTPRE);
if (!!(rxs->flag & RX_FLAG_HT)) {
/* MCS rates */
airtime += ath_pkt_duration(sc, rxs->rate_idx, len,
is_40, is_sgi, is_sp);
} else {
phy = IS_CCK_RATE(rs->rs_rate) ? WLAN_RC_PHY_CCK : WLAN_RC_PHY_OFDM;
rate = &common->sbands[rxs->band].bitrates[rxs->rate_idx];
airtime += ath9k_hw_computetxtime(ah, phy, rate->bitrate * 100,
len, rxs->rate_idx, is_sp);
}
if (!!(sc->airtime_flags & AIRTIME_USE_RX)) {
spin_lock_bh(&acq->lock);
an->airtime_deficit[acno] -= airtime;
if (an->airtime_deficit[acno] <= 0)
__ath_tx_queue_tid(sc, ATH_AN_2_TID(an, tidno));
spin_unlock_bh(&acq->lock);
}
ath_debug_airtime(sc, an, airtime, 0);
exit:
rcu_read_unlock();
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Toke Höiland-Jörgensen | 413 | 100.00% | 1 | 100.00% |
Total | 413 | 100.00% | 1 | 100.00% |
int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp)
{
struct ath_rxbuf *bf;
struct sk_buff *skb = NULL, *requeue_skb, *hdr_skb;
struct ieee80211_rx_status *rxs;
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ieee80211_hw *hw = sc->hw;
int retval;
struct ath_rx_status rs;
enum ath9k_rx_qtype qtype;
bool edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA);
int dma_type;
u64 tsf = 0;
unsigned long flags;
dma_addr_t new_buf_addr;
unsigned int budget = 512;
struct ieee80211_hdr *hdr;
if (edma)
dma_type = DMA_BIDIRECTIONAL;
else
dma_type = DMA_FROM_DEVICE;
qtype = hp ? ATH9K_RX_QUEUE_HP : ATH9K_RX_QUEUE_LP;
tsf = ath9k_hw_gettsf64(ah);
do {
bool decrypt_error = false;
memset(&rs, 0, sizeof(rs));
if (edma)
bf = ath_edma_get_next_rx_buf(sc, &rs, qtype);
else
bf = ath_get_next_rx_buf(sc, &rs);
if (!bf)
break;
skb = bf->bf_mpdu;
if (!skb)
continue;
/*
* Take frame header from the first fragment and RX status from
* the last one.
*/
if (sc->rx.frag)
hdr_skb = sc->rx.frag;
else
hdr_skb = skb;
rxs = IEEE80211_SKB_RXCB(hdr_skb);
memset(rxs, 0, sizeof(struct ieee80211_rx_status));
retval = ath9k_rx_skb_preprocess(sc, hdr_skb, &rs, rxs,
&decrypt_error, tsf);
if (retval)
goto requeue_drop_frag;
/* Ensure we always have an skb to requeue once we are done
* processing the current buffer's skb */
requeue_skb = ath_rxbuf_alloc(common, common->rx_bufsize, GFP_ATOMIC);
/* If there is no memory we ignore the current RX'd frame,
* tell hardware it can give us a new frame using the old
* skb and put it at the tail of the sc->rx.rxbuf list for
* processing. */
if (!requeue_skb) {
RX_STAT_INC(rx_oom_err);
goto requeue_drop_frag;
}
/* We will now give hardware our shiny new allocated skb */
new_buf_addr = dma_map_single(sc->dev, requeue_skb->data,
common->rx_bufsize, dma_type);
if (unlikely(dma_mapping_error(sc->dev, new_buf_addr))) {
dev_kfree_skb_any(requeue_skb);
goto requeue_drop_frag;
}
/* Unmap the frame */
dma_unmap_single(sc->dev, bf->bf_buf_addr,
common->rx_bufsize, dma_type);
bf->bf_mpdu = requeue_skb;
bf->bf_buf_addr = new_buf_addr;
skb_put(skb, rs.rs_datalen + ah->caps.rx_status_len);
if (ah->caps.rx_status_len)
skb_pull(skb, ah->caps.rx_status_len);
if (!rs.rs_more)
ath9k_cmn_rx_skb_postprocess(common, hdr_skb, &rs,
rxs, decrypt_error);
if (rs.rs_more) {
RX_STAT_INC(rx_frags);
/*
* rs_more indicates chained descriptors which can be
* used to link buffers together for a sort of
* scatter-gather operation.
*/
if (sc->rx.frag) {
/* too many fragments - cannot handle frame */
dev_kfree_skb_any(sc->rx.frag);
dev_kfree_skb_any(skb);
RX_STAT_INC(rx_too_many_frags_err);
skb = NULL;
}
sc->rx.frag = skb;
goto requeue;
}
if (sc->rx.frag) {
int space = skb->len - skb_tailroom(hdr_skb);
if (pskb_expand_head(hdr_skb, 0, space, GFP_ATOMIC) < 0) {
dev_kfree_skb(skb);
RX_STAT_INC(rx_oom_err);
goto requeue_drop_frag;
}
sc->rx.frag = NULL;
skb_copy_from_linear_data(skb, skb_put(hdr_skb, skb->len),
skb->len);
dev_kfree_skb_any(skb);
skb = hdr_skb;
}
if (rxs->flag & RX_FLAG_MMIC_STRIPPED)
skb_trim(skb, skb->len - 8);
spin_lock_irqsave(&sc->sc_pm_lock, flags);
if ((sc->ps_flags & (PS_WAIT_FOR_BEACON |
PS_WAIT_FOR_CAB |
PS_WAIT_FOR_PSPOLL_DATA)) ||
ath9k_check_auto_sleep(sc))
ath_rx_ps(sc, skb, rs.is_mybeacon);
spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
ath9k_antenna_check(sc, &rs);
ath9k_apply_ampdu_details(sc, &rs, rxs);
ath_debug_rate_stats(sc, &rs, skb);
ath_rx_count_airtime(sc, &rs, skb);
hdr = (struct ieee80211_hdr *)skb->data;
if (ieee80211_is_ack(hdr->frame_control))
ath_dynack_sample_ack_ts(sc->sc_ah, skb, rs.rs_tstamp);
ieee80211_rx(hw, skb);
requeue_drop_frag:
if (sc->rx.frag) {
dev_kfree_skb_any(sc->rx.frag);
sc->rx.frag = NULL;
}
requeue:
list_add_tail(&bf->list, &sc->rx.rxbuf);
if (!edma) {
ath_rx_buf_relink(sc, bf, flush);
if (!flush)
ath9k_hw_rxena(ah);
} else if (!flush) {
ath_rx_edma_buf_link(sc, qtype);
}
if (!budget--)
break;
} while (1);
if (!(ah->imask & ATH9K_INT_RXEOL)) {
ah->imask |= (ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
ath9k_hw_set_interrupts(ah);
}
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Felix Fietkau | 344 | 39.77% | 13 | 22.81% |
Vasanthakumar Thiagarajan | 149 | 17.23% | 3 | 5.26% |
Sujith Manoharan | 91 | 10.52% | 10 | 17.54% |
Luis R. Rodriguez | 67 | 7.75% | 8 | 14.04% |
Lorenzo Bianconi | 43 | 4.97% | 2 | 3.51% |
Rajkumar Manoharan | 32 | 3.70% | 2 | 3.51% |
Zefir Kurtisi | 22 | 2.54% | 1 | 1.75% |
Ben Greear | 22 | 2.54% | 1 | 1.75% |
Tim Harvey | 18 | 2.08% | 2 | 3.51% |
Ashok Nagarajan | 13 | 1.50% | 1 | 1.75% |
Jouni Malinen | 11 | 1.27% | 3 | 5.26% |
Vivek Natarajan | 11 | 1.27% | 1 | 1.75% |
Christian Lamparter | 10 | 1.16% | 1 | 1.75% |
Toke Höiland-Jörgensen | 10 | 1.16% | 1 | 1.75% |
Eric Dumazet | 8 | 0.92% | 1 | 1.75% |
Mohammed Shafi Shajakhan | 7 | 0.81% | 2 | 3.51% |
Gabor Juhos | 4 | 0.46% | 3 | 5.26% |
Senthil Balasubramanian | 2 | 0.23% | 1 | 1.75% |
Oleksij Rempel | 1 | 0.12% | 1 | 1.75% |
Total | 865 | 100.00% | 57 | 100.00% |
Overall Contributors
Person | Tokens | Prop | Commits | CommitProp |
Felix Fietkau | 2730 | 48.89% | 26 | 16.67% |
Sujith Manoharan | 1036 | 18.55% | 42 | 26.92% |
Toke Höiland-Jörgensen | 423 | 7.58% | 1 | 0.64% |
Luis R. Rodriguez | 398 | 7.13% | 22 | 14.10% |
Vasanthakumar Thiagarajan | 187 | 3.35% | 4 | 2.56% |
Jouni Malinen | 147 | 2.63% | 7 | 4.49% |
Ben Greear | 93 | 1.67% | 5 | 3.21% |
Christian Lamparter | 93 | 1.67% | 1 | 0.64% |
Mohammed Shafi Shajakhan | 71 | 1.27% | 4 | 2.56% |
Zefir Kurtisi | 61 | 1.09% | 3 | 1.92% |
Lorenzo Bianconi | 53 | 0.95% | 3 | 1.92% |
Rajkumar Manoharan | 49 | 0.88% | 5 | 3.21% |
Oleksij Rempel | 48 | 0.86% | 7 | 4.49% |
Miaoqing Pan | 27 | 0.48% | 2 | 1.28% |
Gabor Juhos | 23 | 0.41% | 5 | 3.21% |
Lei Ming | 22 | 0.39% | 1 | 0.64% |
Simon Wunderlich | 21 | 0.38% | 1 | 0.64% |
Joe Perches | 19 | 0.34% | 3 | 1.92% |
Tim Harvey | 18 | 0.32% | 2 | 1.28% |
Ashok Nagarajan | 13 | 0.23% | 1 | 0.64% |
Vivek Natarajan | 11 | 0.20% | 1 | 0.64% |
Senthil Balasubramanian | 11 | 0.20% | 3 | 1.92% |
Jan Kaisrlik | 11 | 0.20% | 1 | 0.64% |
Eric Dumazet | 8 | 0.14% | 1 | 0.64% |
Alexey Dobriyan | 3 | 0.05% | 1 | 0.64% |
Johannes Berg | 3 | 0.05% | 1 | 0.64% |
Javier Cardona | 2 | 0.04% | 1 | 0.64% |
Thomas Wagner | 2 | 0.04% | 1 | 0.64% |
Masahiro Yamada | 1 | 0.02% | 1 | 0.64% |
Total | 5584 | 100.00% | 156 | 100.00% |
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