2 * Copyright (c) 2013 Eugene Krasnikov <k.eugene.e@gmail.com>
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
11 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
21 static inline int get_rssi0(struct wcn36xx_rx_bd *bd)
23 return 100 - ((bd->phy_stat0 >> 24) & 0xff);
26 int wcn36xx_rx_skb(struct wcn36xx *wcn, struct sk_buff *skb)
28 struct ieee80211_rx_status status;
29 struct ieee80211_hdr *hdr;
30 struct wcn36xx_rx_bd *bd;
34 * All fields must be 0, otherwise it can lead to
35 * unexpected consequences.
37 memset(&status, 0, sizeof(status));
39 bd = (struct wcn36xx_rx_bd *)skb->data;
40 buff_to_be((u32 *)bd, sizeof(*bd)/sizeof(u32));
41 wcn36xx_dbg_dump(WCN36XX_DBG_RX_DUMP,
42 "BD <<< ", (char *)bd,
43 sizeof(struct wcn36xx_rx_bd));
45 skb_put(skb, bd->pdu.mpdu_header_off + bd->pdu.mpdu_len);
46 skb_pull(skb, bd->pdu.mpdu_header_off);
49 status.freq = WCN36XX_CENTER_FREQ(wcn);
50 status.band = WCN36XX_BAND(wcn);
51 status.signal = -get_rssi0(bd);
56 status.flag |= RX_FLAG_IV_STRIPPED |
57 RX_FLAG_MMIC_STRIPPED |
60 wcn36xx_dbg(WCN36XX_DBG_RX, "status.flags=%x\n", status.flag);
62 memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
64 hdr = (struct ieee80211_hdr *) skb->data;
65 fc = __le16_to_cpu(hdr->frame_control);
66 sn = IEEE80211_SEQ_TO_SN(__le16_to_cpu(hdr->seq_ctrl));
68 if (ieee80211_is_beacon(hdr->frame_control)) {
69 wcn36xx_dbg(WCN36XX_DBG_BEACON, "beacon skb %p len %d fc %04x sn %d\n",
70 skb, skb->len, fc, sn);
71 wcn36xx_dbg_dump(WCN36XX_DBG_BEACON_DUMP, "SKB <<< ",
72 (char *)skb->data, skb->len);
74 wcn36xx_dbg(WCN36XX_DBG_RX, "rx skb %p len %d fc %04x sn %d\n",
75 skb, skb->len, fc, sn);
76 wcn36xx_dbg_dump(WCN36XX_DBG_RX_DUMP, "SKB <<< ",
77 (char *)skb->data, skb->len);
80 ieee80211_rx_irqsafe(wcn->hw, skb);
85 static void wcn36xx_set_tx_pdu(struct wcn36xx_tx_bd *bd,
90 bd->pdu.mpdu_header_len = mpdu_header_len;
91 bd->pdu.mpdu_header_off = sizeof(*bd);
92 bd->pdu.mpdu_data_off = bd->pdu.mpdu_header_len +
93 bd->pdu.mpdu_header_off;
94 bd->pdu.mpdu_len = len;
98 static inline struct wcn36xx_vif *get_vif_by_addr(struct wcn36xx *wcn,
101 struct wcn36xx_vif *vif_priv = NULL;
102 struct ieee80211_vif *vif = NULL;
103 list_for_each_entry(vif_priv, &wcn->vif_list, list) {
104 vif = container_of((void *)vif_priv,
105 struct ieee80211_vif,
107 if (memcmp(vif->addr, addr, ETH_ALEN) == 0)
110 wcn36xx_warn("vif %pM not found\n", addr);
113 static void wcn36xx_set_tx_data(struct wcn36xx_tx_bd *bd,
115 struct wcn36xx_vif **vif_priv,
116 struct wcn36xx_sta *sta_priv,
117 struct ieee80211_hdr *hdr,
120 struct ieee80211_vif *vif = NULL;
121 struct wcn36xx_vif *__vif_priv = NULL;
122 bd->bd_rate = WCN36XX_BD_RATE_DATA;
125 * For not unicast frames mac80211 will not set sta pointer so use
126 * self_sta_index instead.
129 __vif_priv = sta_priv->vif;
130 vif = container_of((void *)__vif_priv,
131 struct ieee80211_vif,
134 bd->dpu_sign = sta_priv->ucast_dpu_sign;
135 if (vif->type == NL80211_IFTYPE_STATION) {
136 bd->sta_index = sta_priv->bss_sta_index;
137 bd->dpu_desc_idx = sta_priv->bss_dpu_desc_index;
138 } else if (vif->type == NL80211_IFTYPE_AP ||
139 vif->type == NL80211_IFTYPE_ADHOC ||
140 vif->type == NL80211_IFTYPE_MESH_POINT) {
141 bd->sta_index = sta_priv->sta_index;
142 bd->dpu_desc_idx = sta_priv->dpu_desc_index;
145 __vif_priv = get_vif_by_addr(wcn, hdr->addr2);
146 bd->sta_index = __vif_priv->self_sta_index;
147 bd->dpu_desc_idx = __vif_priv->self_dpu_desc_index;
148 bd->dpu_sign = __vif_priv->self_ucast_dpu_sign;
151 if (ieee80211_is_nullfunc(hdr->frame_control) ||
152 (sta_priv && !sta_priv->is_data_encrypted))
159 *vif_priv = __vif_priv;
162 static void wcn36xx_set_tx_mgmt(struct wcn36xx_tx_bd *bd,
164 struct wcn36xx_vif **vif_priv,
165 struct ieee80211_hdr *hdr,
168 struct wcn36xx_vif *__vif_priv =
169 get_vif_by_addr(wcn, hdr->addr2);
170 bd->sta_index = __vif_priv->self_sta_index;
171 bd->dpu_desc_idx = __vif_priv->self_dpu_desc_index;
174 /* default rate for unicast */
175 if (ieee80211_is_mgmt(hdr->frame_control))
176 bd->bd_rate = (WCN36XX_BAND(wcn) == IEEE80211_BAND_5GHZ) ?
177 WCN36XX_BD_RATE_CTRL :
178 WCN36XX_BD_RATE_MGMT;
179 else if (ieee80211_is_ctl(hdr->frame_control))
180 bd->bd_rate = WCN36XX_BD_RATE_CTRL;
182 wcn36xx_warn("frame control type unknown\n");
185 * In joining state trick hardware that probe is sent as
186 * unicast even if address is broadcast.
188 if (__vif_priv->is_joining &&
189 ieee80211_is_probe_req(hdr->frame_control))
195 /* No ack needed not unicast */
197 bd->queue_id = WCN36XX_TX_B_WQ_ID;
199 bd->queue_id = WCN36XX_TX_U_WQ_ID;
200 *vif_priv = __vif_priv;
203 int wcn36xx_start_tx(struct wcn36xx *wcn,
204 struct wcn36xx_sta *sta_priv,
207 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
208 struct wcn36xx_vif *vif_priv = NULL;
209 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
211 bool is_low = ieee80211_is_data(hdr->frame_control);
212 bool bcast = is_broadcast_ether_addr(hdr->addr1) ||
213 is_multicast_ether_addr(hdr->addr1);
214 struct wcn36xx_tx_bd *bd = wcn36xx_dxe_get_next_bd(wcn, is_low);
218 * TX DXE are used in pairs. One for the BD and one for the
219 * actual frame. The BD DXE's has a preallocated buffer while
220 * the skb ones does not. If this isn't true something is really
221 * wierd. TODO: Recover from this situation
224 wcn36xx_err("bd address may not be NULL for BD DXE\n");
228 memset(bd, 0, sizeof(*bd));
230 wcn36xx_dbg(WCN36XX_DBG_TX,
231 "tx skb %p len %d fc %04x sn %d %s %s\n",
232 skb, skb->len, __le16_to_cpu(hdr->frame_control),
233 IEEE80211_SEQ_TO_SN(__le16_to_cpu(hdr->seq_ctrl)),
234 is_low ? "low" : "high", bcast ? "bcast" : "ucast");
236 wcn36xx_dbg_dump(WCN36XX_DBG_TX_DUMP, "", skb->data, skb->len);
238 bd->dpu_rf = WCN36XX_BMU_WQ_TX;
240 bd->tx_comp = info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS;
242 wcn36xx_dbg(WCN36XX_DBG_DXE, "TX_ACK status requested\n");
243 spin_lock_irqsave(&wcn->dxe_lock, flags);
244 if (wcn->tx_ack_skb) {
245 spin_unlock_irqrestore(&wcn->dxe_lock, flags);
246 wcn36xx_warn("tx_ack_skb already set\n");
250 wcn->tx_ack_skb = skb;
251 spin_unlock_irqrestore(&wcn->dxe_lock, flags);
253 /* Only one at a time is supported by fw. Stop the TX queues
254 * until the ack status gets back.
256 * TODO: Add watchdog in case FW does not answer
258 ieee80211_stop_queues(wcn->hw);
261 /* Data frames served first*/
263 wcn36xx_set_tx_data(bd, wcn, &vif_priv, sta_priv, hdr, bcast);
264 wcn36xx_set_tx_pdu(bd,
265 ieee80211_is_data_qos(hdr->frame_control) ?
266 sizeof(struct ieee80211_qos_hdr) :
267 sizeof(struct ieee80211_hdr_3addr),
268 skb->len, sta_priv ? sta_priv->tid : 0);
270 /* MGMT and CTRL frames are handeld here*/
271 wcn36xx_set_tx_mgmt(bd, wcn, &vif_priv, hdr, bcast);
272 wcn36xx_set_tx_pdu(bd,
273 ieee80211_is_data_qos(hdr->frame_control) ?
274 sizeof(struct ieee80211_qos_hdr) :
275 sizeof(struct ieee80211_hdr_3addr),
276 skb->len, WCN36XX_TID);
279 buff_to_be((u32 *)bd, sizeof(*bd)/sizeof(u32));
280 bd->tx_bd_sign = 0xbdbdbdbd;
282 return wcn36xx_dxe_tx_frame(wcn, vif_priv, skb, is_low);