284 lines
8.3 KiB
C
284 lines
8.3 KiB
C
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/*
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* Copyright (c) 2013 Eugene Krasnikov <k.eugene.e@gmail.com>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include "txrx.h"
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static inline int get_rssi0(struct wcn36xx_rx_bd *bd)
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{
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return 100 - ((bd->phy_stat0 >> 24) & 0xff);
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}
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int wcn36xx_rx_skb(struct wcn36xx *wcn, struct sk_buff *skb)
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{
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struct ieee80211_rx_status status;
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struct ieee80211_hdr *hdr;
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struct wcn36xx_rx_bd *bd;
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u16 fc, sn;
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/*
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* All fields must be 0, otherwise it can lead to
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* unexpected consequences.
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*/
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memset(&status, 0, sizeof(status));
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bd = (struct wcn36xx_rx_bd *)skb->data;
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buff_to_be((u32 *)bd, sizeof(*bd)/sizeof(u32));
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wcn36xx_dbg_dump(WCN36XX_DBG_RX_DUMP,
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"BD <<< ", (char *)bd,
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sizeof(struct wcn36xx_rx_bd));
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skb_put(skb, bd->pdu.mpdu_header_off + bd->pdu.mpdu_len);
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skb_pull(skb, bd->pdu.mpdu_header_off);
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status.mactime = 10;
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status.freq = WCN36XX_CENTER_FREQ(wcn);
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status.band = WCN36XX_BAND(wcn);
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status.signal = -get_rssi0(bd);
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status.antenna = 1;
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status.rate_idx = 1;
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status.flag = 0;
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status.rx_flags = 0;
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status.flag |= RX_FLAG_IV_STRIPPED |
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RX_FLAG_MMIC_STRIPPED |
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RX_FLAG_DECRYPTED;
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wcn36xx_dbg(WCN36XX_DBG_RX, "status.flags=%x\n", status.flag);
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memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
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hdr = (struct ieee80211_hdr *) skb->data;
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fc = __le16_to_cpu(hdr->frame_control);
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sn = IEEE80211_SEQ_TO_SN(__le16_to_cpu(hdr->seq_ctrl));
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if (ieee80211_is_beacon(hdr->frame_control)) {
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wcn36xx_dbg(WCN36XX_DBG_BEACON, "beacon skb %p len %d fc %04x sn %d\n",
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skb, skb->len, fc, sn);
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wcn36xx_dbg_dump(WCN36XX_DBG_BEACON_DUMP, "SKB <<< ",
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(char *)skb->data, skb->len);
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} else {
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wcn36xx_dbg(WCN36XX_DBG_RX, "rx skb %p len %d fc %04x sn %d\n",
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skb, skb->len, fc, sn);
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wcn36xx_dbg_dump(WCN36XX_DBG_RX_DUMP, "SKB <<< ",
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(char *)skb->data, skb->len);
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}
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ieee80211_rx_irqsafe(wcn->hw, skb);
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return 0;
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}
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static void wcn36xx_set_tx_pdu(struct wcn36xx_tx_bd *bd,
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u32 mpdu_header_len,
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u32 len,
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u16 tid)
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{
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bd->pdu.mpdu_header_len = mpdu_header_len;
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bd->pdu.mpdu_header_off = sizeof(*bd);
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bd->pdu.mpdu_data_off = bd->pdu.mpdu_header_len +
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bd->pdu.mpdu_header_off;
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bd->pdu.mpdu_len = len;
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bd->pdu.tid = tid;
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}
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static inline struct wcn36xx_vif *get_vif_by_addr(struct wcn36xx *wcn,
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u8 *addr)
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{
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struct wcn36xx_vif *vif_priv = NULL;
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struct ieee80211_vif *vif = NULL;
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list_for_each_entry(vif_priv, &wcn->vif_list, list) {
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vif = container_of((void *)vif_priv,
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struct ieee80211_vif,
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drv_priv);
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if (memcmp(vif->addr, addr, ETH_ALEN) == 0)
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return vif_priv;
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}
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wcn36xx_warn("vif %pM not found\n", addr);
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return NULL;
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}
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static void wcn36xx_set_tx_data(struct wcn36xx_tx_bd *bd,
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struct wcn36xx *wcn,
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struct wcn36xx_vif **vif_priv,
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struct wcn36xx_sta *sta_priv,
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struct ieee80211_hdr *hdr,
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bool bcast)
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{
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struct ieee80211_vif *vif = NULL;
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struct wcn36xx_vif *__vif_priv = NULL;
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bd->bd_rate = WCN36XX_BD_RATE_DATA;
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/*
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* For not unicast frames mac80211 will not set sta pointer so use
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* self_sta_index instead.
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*/
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if (sta_priv) {
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__vif_priv = sta_priv->vif;
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vif = container_of((void *)__vif_priv,
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struct ieee80211_vif,
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drv_priv);
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bd->dpu_sign = sta_priv->ucast_dpu_sign;
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if (vif->type == NL80211_IFTYPE_STATION) {
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bd->sta_index = sta_priv->bss_sta_index;
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bd->dpu_desc_idx = sta_priv->bss_dpu_desc_index;
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} else if (vif->type == NL80211_IFTYPE_AP ||
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vif->type == NL80211_IFTYPE_ADHOC ||
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vif->type == NL80211_IFTYPE_MESH_POINT) {
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bd->sta_index = sta_priv->sta_index;
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bd->dpu_desc_idx = sta_priv->dpu_desc_index;
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}
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} else {
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__vif_priv = get_vif_by_addr(wcn, hdr->addr2);
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bd->sta_index = __vif_priv->self_sta_index;
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bd->dpu_desc_idx = __vif_priv->self_dpu_desc_index;
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bd->dpu_sign = __vif_priv->self_ucast_dpu_sign;
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}
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if (ieee80211_is_nullfunc(hdr->frame_control) ||
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(sta_priv && !sta_priv->is_data_encrypted))
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bd->dpu_ne = 1;
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if (bcast) {
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bd->ub = 1;
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bd->ack_policy = 1;
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}
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*vif_priv = __vif_priv;
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}
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static void wcn36xx_set_tx_mgmt(struct wcn36xx_tx_bd *bd,
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struct wcn36xx *wcn,
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struct wcn36xx_vif **vif_priv,
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struct ieee80211_hdr *hdr,
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bool bcast)
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{
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struct wcn36xx_vif *__vif_priv =
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get_vif_by_addr(wcn, hdr->addr2);
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bd->sta_index = __vif_priv->self_sta_index;
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bd->dpu_desc_idx = __vif_priv->self_dpu_desc_index;
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bd->dpu_ne = 1;
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/* default rate for unicast */
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if (ieee80211_is_mgmt(hdr->frame_control))
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bd->bd_rate = (WCN36XX_BAND(wcn) == IEEE80211_BAND_5GHZ) ?
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WCN36XX_BD_RATE_CTRL :
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WCN36XX_BD_RATE_MGMT;
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else if (ieee80211_is_ctl(hdr->frame_control))
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bd->bd_rate = WCN36XX_BD_RATE_CTRL;
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else
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wcn36xx_warn("frame control type unknown\n");
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/*
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* In joining state trick hardware that probe is sent as
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* unicast even if address is broadcast.
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*/
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if (__vif_priv->is_joining &&
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ieee80211_is_probe_req(hdr->frame_control))
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bcast = false;
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if (bcast) {
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/* broadcast */
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bd->ub = 1;
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/* No ack needed not unicast */
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bd->ack_policy = 1;
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bd->queue_id = WCN36XX_TX_B_WQ_ID;
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} else
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bd->queue_id = WCN36XX_TX_U_WQ_ID;
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*vif_priv = __vif_priv;
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}
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int wcn36xx_start_tx(struct wcn36xx *wcn,
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struct wcn36xx_sta *sta_priv,
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struct sk_buff *skb)
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{
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struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
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struct wcn36xx_vif *vif_priv = NULL;
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struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
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unsigned long flags;
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bool is_low = ieee80211_is_data(hdr->frame_control);
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bool bcast = is_broadcast_ether_addr(hdr->addr1) ||
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is_multicast_ether_addr(hdr->addr1);
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struct wcn36xx_tx_bd *bd = wcn36xx_dxe_get_next_bd(wcn, is_low);
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if (!bd) {
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/*
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* TX DXE are used in pairs. One for the BD and one for the
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* actual frame. The BD DXE's has a preallocated buffer while
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* the skb ones does not. If this isn't true something is really
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* wierd. TODO: Recover from this situation
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*/
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wcn36xx_err("bd address may not be NULL for BD DXE\n");
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return -EINVAL;
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}
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memset(bd, 0, sizeof(*bd));
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wcn36xx_dbg(WCN36XX_DBG_TX,
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"tx skb %p len %d fc %04x sn %d %s %s\n",
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skb, skb->len, __le16_to_cpu(hdr->frame_control),
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IEEE80211_SEQ_TO_SN(__le16_to_cpu(hdr->seq_ctrl)),
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is_low ? "low" : "high", bcast ? "bcast" : "ucast");
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wcn36xx_dbg_dump(WCN36XX_DBG_TX_DUMP, "", skb->data, skb->len);
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bd->dpu_rf = WCN36XX_BMU_WQ_TX;
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bd->tx_comp = info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS;
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if (bd->tx_comp) {
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wcn36xx_dbg(WCN36XX_DBG_DXE, "TX_ACK status requested\n");
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spin_lock_irqsave(&wcn->dxe_lock, flags);
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if (wcn->tx_ack_skb) {
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spin_unlock_irqrestore(&wcn->dxe_lock, flags);
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wcn36xx_warn("tx_ack_skb already set\n");
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return -EINVAL;
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}
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wcn->tx_ack_skb = skb;
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spin_unlock_irqrestore(&wcn->dxe_lock, flags);
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/* Only one at a time is supported by fw. Stop the TX queues
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* until the ack status gets back.
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*
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* TODO: Add watchdog in case FW does not answer
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*/
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ieee80211_stop_queues(wcn->hw);
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}
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/* Data frames served first*/
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if (is_low) {
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wcn36xx_set_tx_data(bd, wcn, &vif_priv, sta_priv, hdr, bcast);
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wcn36xx_set_tx_pdu(bd,
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ieee80211_is_data_qos(hdr->frame_control) ?
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sizeof(struct ieee80211_qos_hdr) :
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sizeof(struct ieee80211_hdr_3addr),
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skb->len, sta_priv ? sta_priv->tid : 0);
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} else {
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/* MGMT and CTRL frames are handeld here*/
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wcn36xx_set_tx_mgmt(bd, wcn, &vif_priv, hdr, bcast);
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wcn36xx_set_tx_pdu(bd,
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ieee80211_is_data_qos(hdr->frame_control) ?
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sizeof(struct ieee80211_qos_hdr) :
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sizeof(struct ieee80211_hdr_3addr),
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skb->len, WCN36XX_TID);
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}
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buff_to_be((u32 *)bd, sizeof(*bd)/sizeof(u32));
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bd->tx_bd_sign = 0xbdbdbdbd;
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return wcn36xx_dxe_tx_frame(wcn, vif_priv, skb, is_low);
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}
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