334 lines
9.5 KiB
C
334 lines
9.5 KiB
C
/*
|
|
* 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 "txrx.h"
|
|
|
|
static inline int get_rssi0(struct wcn36xx_rx_bd *bd)
|
|
{
|
|
return 100 - ((bd->phy_stat0 >> 24) & 0xff);
|
|
}
|
|
|
|
int wcn36xx_rx_skb(struct wcn36xx *wcn, struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_rx_status status;
|
|
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));
|
|
|
|
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));
|
|
|
|
/* When scanning associate beacons to this */
|
|
if (ieee80211_is_beacon(hdr->frame_control) && wcn->scan_freq) {
|
|
status.freq = wcn->scan_freq;
|
|
status.band = wcn->scan_band;
|
|
} else {
|
|
status.freq = WCN36XX_CENTER_FREQ(wcn);
|
|
status.band = WCN36XX_BAND(wcn);
|
|
}
|
|
|
|
status.mactime = 10;
|
|
status.signal = -get_rssi0(bd);
|
|
status.antenna = 1;
|
|
status.rate_idx = 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);
|
|
|
|
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);
|
|
}
|
|
|
|
ieee80211_rx_irqsafe(wcn->hw, skb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
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;
|
|
bd->pdu.bd_ssn = WCN36XX_TXBD_SSN_FILL_DPU_QOS;
|
|
}
|
|
|
|
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_vif *vif = NULL;
|
|
struct wcn36xx_vif *__vif_priv = NULL;
|
|
bool is_data_qos;
|
|
|
|
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 (ieee80211_is_nullfunc(hdr->frame_control) ||
|
|
(sta_priv && !sta_priv->is_data_encrypted))
|
|
bd->dpu_ne = 1;
|
|
|
|
if (bcast) {
|
|
bd->ub = 1;
|
|
bd->ack_policy = 1;
|
|
}
|
|
*vif_priv = __vif_priv;
|
|
|
|
is_data_qos = ieee80211_is_data_qos(hdr->frame_control);
|
|
|
|
wcn36xx_set_tx_pdu(bd,
|
|
is_data_qos ?
|
|
sizeof(struct ieee80211_qos_hdr) :
|
|
sizeof(struct ieee80211_hdr_3addr),
|
|
skb->len, sta_priv ? sta_priv->tid : 0);
|
|
|
|
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;
|
|
|
|
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);
|
|
unsigned long flags;
|
|
bool is_low = ieee80211_is_data(hdr->frame_control);
|
|
bool bcast = is_broadcast_ether_addr(hdr->addr1) ||
|
|
is_multicast_ether_addr(hdr->addr1);
|
|
struct wcn36xx_tx_bd *bd = wcn36xx_dxe_get_next_bd(wcn, is_low);
|
|
|
|
if (!bd) {
|
|
/*
|
|
* TX DXE are used in pairs. One for the BD and one for the
|
|
* actual frame. The BD DXE's has a preallocated buffer while
|
|
* the skb ones does not. If this isn't true something is really
|
|
* wierd. TODO: Recover from this situation
|
|
*/
|
|
|
|
wcn36xx_err("bd address may not be NULL for BD DXE\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
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;
|
|
|
|
bd->tx_comp = !!(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS);
|
|
if (bd->tx_comp) {
|
|
wcn36xx_dbg(WCN36XX_DBG_DXE, "TX_ACK status requested\n");
|
|
spin_lock_irqsave(&wcn->dxe_lock, flags);
|
|
if (wcn->tx_ack_skb) {
|
|
spin_unlock_irqrestore(&wcn->dxe_lock, flags);
|
|
wcn36xx_warn("tx_ack_skb already set\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
wcn->tx_ack_skb = skb;
|
|
spin_unlock_irqrestore(&wcn->dxe_lock, flags);
|
|
|
|
/* Only one at a time is supported by fw. Stop the TX queues
|
|
* until the ack status gets back.
|
|
*
|
|
* TODO: Add watchdog in case FW does not answer
|
|
*/
|
|
ieee80211_stop_queues(wcn->hw);
|
|
}
|
|
|
|
/* 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;
|
|
|
|
return wcn36xx_dxe_tx_frame(wcn, vif_priv, skb, is_low);
|
|
}
|