/*
* Copyright (c) 2013 Eugene Krasnikov <k.eugene.e@gmail.com>
*
* 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.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/random.h>
#include "txrx.h"
static inline int get_rssi0(struct wcn36xx_rx_bd *bd)
{
return 100 - ((bd->phy_stat0 >> 24) & 0xff);
}
static inline int get_snr(struct wcn36xx_rx_bd *bd)
{
return ((bd->phy_stat1 >> 24) & 0xff);
}
struct wcn36xx_rate {
u16 bitrate;
u16 mcs_or_legacy_index;
enum mac80211_rx_encoding encoding;
enum mac80211_rx_encoding_flags encoding_flags;
enum rate_info_bw bw;
};
/* Buffer descriptor rx_ch field is limited to 5-bit (4+1), a mapping is used
* for 11A Channels.
*/
static const u8 ab_rx_ch_map[] = { 36, 40, 44, 48, 52, 56, 60, 64, 100, 104,
108, 112, 116, 120, 124, 128, 132, 136, 140,
149, 153, 157, 161, 165, 144 };
static const struct wcn36xx_rate wcn36xx_rate_table[] = {
/* 11b rates */
{ 10, 0, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 },
{ 20, 1, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 },
{ 55, 2, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 },
{ 110, 3, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 },
/* 11b SP (short preamble) */
{ 10, 0, RX_ENC_LEGACY, RX_ENC_FLAG_SHORTPRE, RATE_INFO_BW_20 },
{ 20, 1, RX_ENC_LEGACY, RX_ENC_FLAG_SHORTPRE, RATE_INFO_BW_20 },
{ 55, 2, RX_ENC_LEGACY, RX_ENC_FLAG_SHORTPRE, RATE_INFO_BW_20 },
{ 110, 3, RX_ENC_LEGACY, RX_ENC_FLAG_SHORTPRE, RATE_INFO_BW_20 },
/* 11ag */
{ 60, 4, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 },
{ 90, 5, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 },
{ 120, 6, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 },
{ 180, 7, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 },
{ 240, 8, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 },
{ 360, 9, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 },
{ 480, 10, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 },
{ 540, 11, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 },
/* 11n */
{ 65, 0, RX_ENC_HT, 0, RATE_INFO_BW_20 },
{ 130, 1, RX_ENC_HT, 0, RATE_INFO_BW_20 },
{ 195, 2, RX_ENC_HT, 0, RATE_INFO_BW_20 },
{ 260, 3, RX_ENC_HT, 0, RATE_INFO_BW_20 },
{ 390, 4, RX_ENC_HT, 0, RATE_INFO_BW_20 },
{ 520, 5, RX_ENC_HT, 0, RATE_INFO_BW_20 },
{ 585, 6, RX_ENC_HT, 0, RATE_INFO_BW_20 },
{ 650, 7, RX_ENC_HT, 0, RATE_INFO_BW_20 },
/* 11n SGI */
{ 72, 0, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 },
{ 144, 1, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 },
{ 217, 2, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 },
{ 289, 3, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 },
{ 434, 4, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 },
{ 578, 5, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 },
{ 650, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 },
{ 722, 7, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 },
/* 11n GF (greenfield) */
{ 65, 0, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_20 },
{ 130, 1, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_20 },
{ 195, 2, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_20 },
{ 260, 3, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_20 },
{ 390, 4, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_20 },
{ 520, 5, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_20 },
{ 585, 6, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_20 },
{ 650, 7, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_20 },
/* 11n CB (channel bonding) */
{ 135, 0, RX_ENC_HT, 0, RATE_INFO_BW_40 },
{ 270, 1, RX_ENC_HT, 0, RATE_INFO_BW_40 },
{ 405, 2, RX_ENC_HT, 0, RATE_INFO_BW_40 },
{ 540, 3, RX_ENC_HT, 0, RATE_INFO_BW_40 },
{ 810, 4, RX_ENC_HT, 0, RATE_INFO_BW_40 },
{ 1080, 5, RX_ENC_HT, 0, RATE_INFO_BW_40 },
{ 1215, 6, RX_ENC_HT, 0, RATE_INFO_BW_40 },
{ 1350, 7, RX_ENC_HT, 0, RATE_INFO_BW_40 },
/* 11n CB + SGI */
{ 150, 0, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 300, 1, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 450, 2, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 600, 3, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 900, 4, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 1200, 5, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 1500, 7, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
/* 11n GF + CB */
{ 135, 0, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_40 },
{ 270, 1, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_40 },
{ 405, 2, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_40 },
{ 540, 3, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_40 },
{ 810, 4, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_40 },
{ 1080, 5, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_40 },
{ 1215, 6, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_40 },
{ 1350, 7, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_40 },
/* 11ac reserved indices */
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
/* 11ac 20 MHz 800ns GI MCS 0-8 */
{ 65, 0, RX_ENC_HT, 0, RATE_INFO_BW_20 },
{ 130, 1, RX_ENC_HT, 0, RATE_INFO_BW_20 },
{ 195, 2, RX_ENC_HT, 0, RATE_INFO_BW_20 },
{ 260, 3, RX_ENC_HT, 0, RATE_INFO_BW_20 },
{ 390, 4, RX_ENC_HT, 0, RATE_INFO_BW_20 },
{ 520, 5, RX_ENC_HT, 0, RATE_INFO_BW_20 },
{ 585, 6, RX_ENC_HT, 0, RATE_INFO_BW_20 },
{ 650, 7, RX_ENC_HT, 0, RATE_INFO_BW_20 },
{ 780, 8, RX_ENC_HT, 0, RATE_INFO_BW_20 },
/* 11ac reserved indices */
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
/* 11ac 20 MHz 400ns SGI MCS 6-8 */
{ 655, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 },
{ 722, 7, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 },
{ 866, 8, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 },
/* 11ac reserved indices */
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
/* 11ac 40 MHz 800ns GI MCS 0-9 */
{ 135, 0, RX_ENC_HT, 0, RATE_INFO_BW_40 },
{ 270, 1, RX_ENC_HT, 0, RATE_INFO_BW_40 },
{ 405, 2, RX_ENC_HT, 0, RATE_INFO_BW_40 },
{ 540, 3, RX_ENC_HT, 0, RATE_INFO_BW_40 },
{ 810, 4, RX_ENC_HT, 0, RATE_INFO_BW_40 },
{ 1080, 5, RX_ENC_HT, 0, RATE_INFO_BW_40 },
{ 1215, 6, RX_ENC_HT, 0, RATE_INFO_BW_40 },
{ 1350, 7, RX_ENC_HT, 0, RATE_INFO_BW_40 },
{ 1350, 7, RX_ENC_HT, 0, RATE_INFO_BW_40 },
{ 1620, 8, RX_ENC_HT, 0, RATE_INFO_BW_40 },
{ 1800, 9, RX_ENC_HT, 0, RATE_INFO_BW_40 },
/* 11ac reserved indices */
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
/* 11ac 40 MHz 400ns SGI MCS 5-7 */
{ 1200, 5, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 1500, 7, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
/* 11ac reserved index */
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
/* 11ac 40 MHz 400ns SGI MCS 5-7 */
{ 1800, 8, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 2000, 9, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
/* 11ac reserved index */
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
/* 11ac 80 MHz 800ns GI MCS 0-7 */
{ 292, 0, RX_ENC_HT, 0, RATE_INFO_BW_80},
{ 585, 1, RX_ENC_HT, 0, RATE_INFO_BW_80},
{ 877, 2, RX_ENC_HT, 0, RATE_INFO_BW_80},
{ 1170, 3, RX_ENC_HT, 0, RATE_INFO_BW_80},
{ 1755, 4, RX_ENC_HT, 0, RATE_INFO_BW_80},
{ 2340, 5, RX_ENC_HT, 0, RATE_INFO_BW_80},
{ 2632, 6, RX_ENC_HT, 0, RATE_INFO_BW_80},
{ 2925, 7, RX_ENC_HT, 0, RATE_INFO_BW_80},
/* 11 ac reserved index */
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
/* 11ac 80 MHz 800 ns GI MCS 8-9 */
{ 3510, 8, RX_ENC_HT, 0, RATE_INFO_BW_80},
{ 3900, 9, RX_ENC_HT, 0, RATE_INFO_BW_80},
/* 11 ac reserved indices */
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
/* 11ac 80 MHz 400 ns SGI MCS 6-7 */
{ 2925, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_80 },
{ 3250, 7, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_80 },
/* 11ac reserved index */
{ 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },
/* 11ac 80 MHz 400ns SGI MCS 8-9 */
{ 3900, 8, RX_ENC_VHT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_80 },
{ 4333, 9, RX_ENC_VHT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_80 },
};
static struct sk_buff *wcn36xx_unchain_msdu(struct sk_buff_head *amsdu)
{
struct sk_buff *skb, *first;
int total_len = 0;
int space;
first = __skb_dequeue(amsdu);
skb_queue_walk(amsdu, skb)
total_len += skb->len;
space = total_len - skb_tailroom(first);
if (space > 0 && pskb_expand_head(first, 0, space, GFP_ATOMIC) < 0) {
__skb_queue_head(amsdu, first);
return NULL;
}
/* Walk list again, copying contents into msdu_head */
while ((skb = __skb_dequeue(amsdu))) {
skb_copy_from_linear_data(skb, skb_put(first, skb->len),
skb->len);
dev_kfree_skb_irq(skb);
}
return first;
}
static void __skb_queue_purge_irq(struct sk_buff_head *list)
{
struct sk_buff *skb;
while ((skb = __skb_dequeue(list)) != NULL)
dev_kfree_skb_irq(skb);
}
static void wcn36xx_update_survey(struct wcn36xx *wcn, int rssi, int snr,
int band, int freq)
{
static struct ieee80211_channel *channel;
struct ieee80211_supported_band *sband;
int idx;
int i;
u8 snr_sample = snr & 0xff;
idx = 0;
if (band == NL80211_BAND_5GHZ)
idx = wcn->hw->wiphy->bands[NL80211_BAND_2GHZ]->n_channels;
sband = wcn->hw->wiphy->bands[band];
channel = sband->channels;
for (i = 0; i < sband->n_channels; i++, channel++) {
if (channel->center_freq == freq) {
idx += i;
break;
}
}
spin_lock(&wcn->survey_lock);
wcn->chan_survey[idx].rssi = rssi;
wcn->chan_survey[idx].snr = snr;
spin_unlock(&wcn->survey_lock);
add_device_randomness(&snr_sample, sizeof(snr_sample));
}
int wcn36xx_rx_skb(struct wcn36xx *wcn, struct sk_buff *skb)
{
struct ieee80211_rx_status status;
const struct wcn36xx_rate *rate;
struct ieee80211_hdr *hdr;
struct wcn36xx_rx_bd *bd;
u16 fc, sn;
/*
* All fields must be 0, otherwise it can lead to
* unexpected consequences.
*/
memset(&status, 0, sizeof(status));
bd = (struct wcn36xx_rx_bd *)skb->data;
buff_to_be((u32 *)bd, sizeof(*bd)/sizeof(u32));
wcn36xx_dbg_dump(WCN36XX_DBG_RX_DUMP,
"BD <<< ", (char *)bd,
sizeof(struct wcn36xx_rx_bd));
if (bd->pdu.mpdu_data_off <= bd->pdu.mpdu_header_off ||
bd->pdu.mpdu_len < bd->pdu.mpdu_header_len)
goto drop;
if (bd->asf && !bd->esf) { /* chained A-MSDU chunks */
/* Sanity check */
if (bd->pdu.mpdu_data_off + bd->pdu.mpdu_len > WCN36XX_PKT_SIZE)
goto drop;
skb_put(skb, bd->pdu.mpdu_data_off + bd->pdu.mpdu_len);
skb_pull(skb, bd->pdu.mpdu_data_off);
/* Only set status for first chained BD (with mac header) */
goto done;
}
if (bd->pdu.mpdu_header_off < sizeof(*bd) ||
bd->pdu.mpdu_header_off + bd->pdu.mpdu_len > WCN36XX_PKT_SIZE)
goto drop;
skb_put(skb, bd->pdu.mpdu_header_off + bd->pdu.mpdu_len);
skb_pull(skb, bd->pdu.mpdu_header_off);
hdr = (struct ieee80211_hdr *) skb->data;
fc = __le16_to_cpu(hdr->frame_control);
sn = IEEE80211_SEQ_TO_SN(__le16_to_cpu(hdr->seq_ctrl));
status.mactime = 10;
status.signal = -get_rssi0(bd);
status.antenna = 1;
status.flag = 0;
status.rx_flags = 0;
status.flag |= RX_FLAG_IV_STRIPPED |
RX_FLAG_MMIC_STRIPPED |
RX_FLAG_DECRYPTED;
wcn36xx_dbg(WCN36XX_DBG_RX, "status.flags=%x\n", status.flag);
if (bd->scan_learn) {
/* If packet originate from hardware scanning, extract the
* band/channel from bd descriptor.
*/
u8 hwch = (bd->reserved0 << 4) + bd->rx_ch;
if (bd->rf_band != 1 && hwch <= sizeof(ab_rx_ch_map) && hwch >= 1) {
status.band = NL80211_BAND_5GHZ;
status.freq = ieee80211_channel_to_frequency(ab_rx_ch_map[hwch - 1],
status.band);
} else {
status.band = NL80211_BAND_2GHZ;
status.freq = ieee80211_channel_to_frequency(hwch, status.band);
}
} else {
status.band = WCN36XX_BAND(wcn);
status.freq = WCN36XX_CENTER_FREQ(wcn);
}
wcn36xx_update_survey(wcn, status.signal, get_snr(bd),
status.band, status.freq);
if (bd->rate_id < ARRAY_SIZE(wcn36xx_rate_table)) {
rate = &wcn36xx_rate_table[bd->rate_id];
status.encoding = rate->encoding;
status.enc_flags = rate->encoding_flags;
status.bw = rate->bw;
status.rate_idx = rate->mcs_or_legacy_index;
status.nss = 1;
if (status.band == NL80211_BAND_5GHZ &&
status.encoding == RX_ENC_LEGACY &&
status.rate_idx >= 4) {
/* no dsss rates in 5Ghz rates table */
status.rate_idx -= 4;
}
} else {
status.encoding = 0;
status.bw = 0;
status.enc_flags = 0;
status.rate_idx = 0;
}
if (ieee80211_is_beacon(hdr->frame_control) ||
ieee80211_is_probe_resp(hdr->frame_control))
status.boottime_ns = ktime_get_boottime_ns();
memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
if (ieee80211_is_beacon(hdr->frame_control)) {
wcn36xx_dbg(WCN36XX_DBG_BEACON, "beacon skb %p len %d fc %04x sn %d\n",
skb, skb->len, fc, sn);
wcn36xx_dbg_dump(WCN36XX_DBG_BEACON_DUMP, "SKB <<< ",
(char *)skb->data, skb->len);
} else {
wcn36xx_dbg(WCN36XX_DBG_RX, "rx skb %p len %d fc %04x sn %d\n",
skb, skb->len, fc, sn);
wcn36xx_dbg_dump(WCN36XX_DBG_RX_DUMP, "SKB <<< ",
(char *)skb->data, skb->len);
}
done:
/* Chained AMSDU ? slow path */
if (unlikely(bd->asf && !(bd->lsf && bd->esf))) {
if (bd->esf && !skb_queue_empty(&wcn->amsdu)) {
wcn36xx_err("Discarding non complete chain");
__skb_queue_purge_irq(&wcn->amsdu);
}
__skb_queue_tail(&wcn->amsdu, skb);
if (!bd->lsf)
return 0; /* Not the last AMSDU, wait for more */
skb = wcn36xx_unchain_msdu(&wcn->amsdu);
if (!skb)
goto drop;
}
ieee80211_rx_irqsafe(wcn->hw, skb);
return 0;
drop: /* drop everything */
wcn36xx_err("Drop frame! skb:%p len:%u hoff:%u doff:%u asf=%u esf=%u lsf=%u\n",
skb, bd->pdu.mpdu_len, bd->pdu.mpdu_header_off,
bd->pdu.mpdu_data_off, bd->asf, bd->esf, bd->lsf);
dev_kfree_skb_irq(skb);
__skb_queue_purge_irq(&wcn->amsdu);
return -EINVAL;
}
static void wcn36xx_set_tx_pdu(struct wcn36xx_tx_bd *bd,
u32 mpdu_header_len,
u32 len,
u16 tid)
{
bd->pdu.mpdu_header_len = mpdu_header_len;
bd->pdu.mpdu_header_off = sizeof(*bd);
bd->pdu.mpdu_data_off = bd->pdu.mpdu_header_len +
bd->pdu.mpdu_header_off;
bd->pdu.mpdu_len = len;
bd->pdu.tid = tid;
}
static inline struct wcn36xx_vif *get_vif_by_addr(struct wcn36xx *wcn,
u8 *addr)
{
struct wcn36xx_vif *vif_priv = NULL;
struct ieee80211_vif *vif = NULL;
list_for_each_entry(vif_priv, &wcn->vif_list, list) {
vif = wcn36xx_priv_to_vif(vif_priv);
if (memcmp(vif->addr, addr, ETH_ALEN) == 0)
return vif_priv;
}
wcn36xx_warn("vif %pM not found\n", addr);
return NULL;
}
static void wcn36xx_tx_start_ampdu(struct wcn36xx *wcn,
struct wcn36xx_sta *sta_priv,
struct sk_buff *skb)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct ieee80211_sta *sta;
u8 *qc, tid;
if (!conf_is_ht(&wcn->hw->conf))
return;
sta = wcn36xx_priv_to_sta(sta_priv);
if (WARN_ON(!ieee80211_is_data_qos(hdr->frame_control)))
return;
if (skb_get_queue_mapping(skb) == IEEE80211_AC_VO)
return;
qc = ieee80211_get_qos_ctl(hdr);
tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
spin_lock(&sta_priv->ampdu_lock);
if (sta_priv->ampdu_state[tid] != WCN36XX_AMPDU_NONE)
goto out_unlock;
if (sta_priv->non_agg_frame_ct++ >= WCN36XX_AMPDU_START_THRESH) {
sta_priv->ampdu_state[tid] = WCN36XX_AMPDU_START;
sta_priv->non_agg_frame_ct = 0;
ieee80211_start_tx_ba_session(sta, tid, 0);
}
out_unlock:
spin_unlock(&sta_priv->ampdu_lock);
}
static void wcn36xx_set_tx_data(struct wcn36xx_tx_bd *bd,
struct wcn36xx *wcn,
struct wcn36xx_vif **vif_priv,
struct wcn36xx_sta *sta_priv,
struct sk_buff *skb,
bool bcast)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ieee80211_vif *vif = NULL;
struct wcn36xx_vif *__vif_priv = NULL;
bool is_data_qos = ieee80211_is_data_qos(hdr->frame_control);
u16 tid = 0;
bd->bd_rate = WCN36XX_BD_RATE_DATA;
/*
* For not unicast frames mac80211 will not set sta pointer so use
* self_sta_index instead.
*/
if (sta_priv) {
__vif_priv = sta_priv->vif;
vif = wcn36xx_priv_to_vif(__vif_priv);
bd->dpu_sign = sta_priv->ucast_dpu_sign;
if (vif->type == NL80211_IFTYPE_STATION) {
bd->sta_index = sta_priv->bss_sta_index;
bd->dpu_desc_idx = sta_priv->bss_dpu_desc_index;
} else if (vif->type == NL80211_IFTYPE_AP ||
vif->type == NL80211_IFTYPE_ADHOC ||
vif->type == NL80211_IFTYPE_MESH_POINT) {
bd->sta_index = sta_priv->sta_index;
bd->dpu_desc_idx = sta_priv->dpu_desc_index;
}
} else {
__vif_priv = get_vif_by_addr(wcn, hdr->addr2);
bd->sta_index = __vif_priv->self_sta_index;
bd->dpu_desc_idx = __vif_priv->self_dpu_desc_index;
bd->dpu_sign = __vif_priv->self_ucast_dpu_sign;
}
if (is_data_qos) {
tid = ieee80211_get_tid(hdr);
/* TID->QID is one-to-one mapping */
bd->queue_id = tid;
bd->pdu.bd_ssn = WCN36XX_TXBD_SSN_FILL_DPU_QOS;
} else {
bd->pdu.bd_ssn = WCN36XX_TXBD_SSN_FILL_DPU_NON_QOS;
}
if (info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT ||
(sta_priv && !sta_priv->is_data_encrypted)) {
bd->dpu_ne = 1;
}
if (ieee80211_is_any_nullfunc(hdr->frame_control)) {
/* Don't use a regular queue for null packet (no ampdu) */
bd->queue_id = WCN36XX_TX_U_WQ_ID;
bd->bd_rate = WCN36XX_BD_RATE_CTRL;
if (ieee80211_is_qos_nullfunc(hdr->frame_control))
bd->pdu.bd_ssn = WCN36XX_TXBD_SSN_FILL_HOST;
}
if (bcast) {
bd->ub = 1;
bd->ack_policy = 1;
}
*vif_priv = __vif_priv;
wcn36xx_set_tx_pdu(bd,
is_data_qos ?
sizeof(struct ieee80211_qos_hdr) :
sizeof(struct ieee80211_hdr_3addr),
skb->len, tid);
if (sta_priv && is_data_qos)
wcn36xx_tx_start_ampdu(wcn, sta_priv, skb);
}
static void wcn36xx_set_tx_mgmt(struct wcn36xx_tx_bd *bd,
struct wcn36xx *wcn,
struct wcn36xx_vif **vif_priv,
struct sk_buff *skb,
bool bcast)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct wcn36xx_vif *__vif_priv =
get_vif_by_addr(wcn, hdr->addr2);
bd->sta_index = __vif_priv->self_sta_index;
bd->dpu_desc_idx = __vif_priv->self_dpu_desc_index;
bd->dpu_ne = 1;
/* default rate for unicast */
if (ieee80211_is_mgmt(hdr->frame_control))
bd->bd_rate = (WCN36XX_BAND(wcn) == NL80211_BAND_5GHZ) ?
WCN36XX_BD_RATE_CTRL :
WCN36XX_BD_RATE_MGMT;
else if (ieee80211_is_ctl(hdr->frame_control))
bd->bd_rate = WCN36XX_BD_RATE_CTRL;
else
wcn36xx_warn("frame control type unknown\n");
/*
* In joining state trick hardware that probe is sent as
* unicast even if address is broadcast.
*/
if (__vif_priv->is_joining &&
ieee80211_is_probe_req(hdr->frame_control))
bcast = false;
if (bcast) {
/* broadcast */
bd->ub = 1;
/* No ack needed not unicast */
bd->ack_policy = 1;
bd->queue_id = WCN36XX_TX_B_WQ_ID;
} else
bd->queue_id = WCN36XX_TX_U_WQ_ID;
*vif_priv = __vif_priv;
bd->pdu.bd_ssn = WCN36XX_TXBD_SSN_FILL_DPU_NON_QOS;
wcn36xx_set_tx_pdu(bd,
ieee80211_is_data_qos(hdr->frame_control) ?
sizeof(struct ieee80211_qos_hdr) :
sizeof(struct ieee80211_hdr_3addr),
skb->len, WCN36XX_TID);
}
int wcn36xx_start_tx(struct wcn36xx *wcn,
struct wcn36xx_sta *sta_priv,
struct sk_buff *skb)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct wcn36xx_vif *vif_priv = NULL;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
bool is_low = ieee80211_is_data(hdr->frame_control);
bool bcast = is_broadcast_ether_addr(hdr->addr1) ||
is_multicast_ether_addr(hdr->addr1);
bool ack_ind = (info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS) &&
!(info->flags & IEEE80211_TX_CTL_NO_ACK);
struct wcn36xx_tx_bd bd;
int ret;
memset(&bd, 0, sizeof(bd));
wcn36xx_dbg(WCN36XX_DBG_TX,
"tx skb %p len %d fc %04x sn %d %s %s\n",
skb, skb->len, __le16_to_cpu(hdr->frame_control),
IEEE80211_SEQ_TO_SN(__le16_to_cpu(hdr->seq_ctrl)),
is_low ? "low" : "high", bcast ? "bcast" : "ucast");
wcn36xx_dbg_dump(WCN36XX_DBG_TX_DUMP, "", skb->data, skb->len);
bd.dpu_rf = WCN36XX_BMU_WQ_TX;
if (unlikely(ack_ind)) {
wcn36xx_dbg(WCN36XX_DBG_DXE, "TX_ACK status requested\n");
/* Only one at a time is supported by fw. Stop the TX queues
* until the ack status gets back.
*/
ieee80211_stop_queues(wcn->hw);
/* Request ack indication from the firmware */
bd.tx_comp = 1;
}
/* Data frames served first*/
if (is_low)
wcn36xx_set_tx_data(&bd, wcn, &vif_priv, sta_priv, skb, bcast);
else
/* MGMT and CTRL frames are handeld here*/
wcn36xx_set_tx_mgmt(&bd, wcn, &vif_priv, skb, bcast);
buff_to_be((u32 *)&bd, sizeof(bd)/sizeof(u32));
bd.tx_bd_sign = 0xbdbdbdbd;
ret = wcn36xx_dxe_tx_frame(wcn, vif_priv, &bd, skb, is_low);
if (unlikely(ret && ack_ind)) {
/* If the skb has not been transmitted, resume TX queue */
ieee80211_wake_queues(wcn->hw);
}
return ret;
}
void wcn36xx_process_tx_rate(struct ani_global_class_a_stats_info *stats, struct rate_info *info)
{
/* tx_rate is in units of 500kbps; mac80211 wants them in 100kbps */
if (stats->tx_rate_flags & HAL_TX_RATE_LEGACY)
info->legacy = stats->tx_rate * 5;
info->flags = 0;
info->mcs = stats->mcs_index;
info->nss = 1;
if (stats->tx_rate_flags & (HAL_TX_RATE_HT20 | HAL_TX_RATE_HT40))
info->flags |= RATE_INFO_FLAGS_MCS;
if (stats->tx_rate_flags & (HAL_TX_RATE_VHT20 | HAL_TX_RATE_VHT40 | HAL_TX_RATE_VHT80))
info->flags |= RATE_INFO_FLAGS_VHT_MCS;
if (stats->tx_rate_flags & HAL_TX_RATE_SGI)
info->flags |= RATE_INFO_FLAGS_SHORT_GI;
if (stats->tx_rate_flags & (HAL_TX_RATE_HT20 | HAL_TX_RATE_VHT20))
info->bw = RATE_INFO_BW_20;
if (stats->tx_rate_flags & (HAL_TX_RATE_HT40 | HAL_TX_RATE_VHT40))
info->bw = RATE_INFO_BW_40;
if (stats->tx_rate_flags & HAL_TX_RATE_VHT80)
info->bw = RATE_INFO_BW_80;
}
