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8e84c258 EK |
1 | /* |
2 | * Copyright (c) 2013 Eugene Krasnikov <k.eugene.e@gmail.com> | |
3 | * | |
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. | |
7 | * | |
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. | |
15 | */ | |
16 | ||
17 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
18 | ||
19 | #include "txrx.h" | |
20 | ||
21 | static inline int get_rssi0(struct wcn36xx_rx_bd *bd) | |
22 | { | |
23 | return 100 - ((bd->phy_stat0 >> 24) & 0xff); | |
24 | } | |
25 | ||
26 | int wcn36xx_rx_skb(struct wcn36xx *wcn, struct sk_buff *skb) | |
27 | { | |
28 | struct ieee80211_rx_status status; | |
29 | struct ieee80211_hdr *hdr; | |
30 | struct wcn36xx_rx_bd *bd; | |
31 | u16 fc, sn; | |
32 | ||
33 | /* | |
34 | * All fields must be 0, otherwise it can lead to | |
35 | * unexpected consequences. | |
36 | */ | |
37 | memset(&status, 0, sizeof(status)); | |
38 | ||
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)); | |
44 | ||
45 | skb_put(skb, bd->pdu.mpdu_header_off + bd->pdu.mpdu_len); | |
46 | skb_pull(skb, bd->pdu.mpdu_header_off); | |
47 | ||
48 | status.mactime = 10; | |
49 | status.freq = WCN36XX_CENTER_FREQ(wcn); | |
50 | status.band = WCN36XX_BAND(wcn); | |
51 | status.signal = -get_rssi0(bd); | |
52 | status.antenna = 1; | |
53 | status.rate_idx = 1; | |
54 | status.flag = 0; | |
55 | status.rx_flags = 0; | |
56 | status.flag |= RX_FLAG_IV_STRIPPED | | |
57 | RX_FLAG_MMIC_STRIPPED | | |
58 | RX_FLAG_DECRYPTED; | |
59 | ||
f980ebc0 | 60 | wcn36xx_dbg(WCN36XX_DBG_RX, "status.flags=%llx\n", status.flag); |
8e84c258 EK |
61 | |
62 | memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status)); | |
63 | ||
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)); | |
67 | ||
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); | |
73 | } else { | |
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); | |
78 | } | |
79 | ||
80 | ieee80211_rx_irqsafe(wcn->hw, skb); | |
81 | ||
82 | return 0; | |
83 | } | |
84 | ||
85 | static void wcn36xx_set_tx_pdu(struct wcn36xx_tx_bd *bd, | |
86 | u32 mpdu_header_len, | |
87 | u32 len, | |
88 | u16 tid) | |
89 | { | |
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; | |
95 | bd->pdu.tid = tid; | |
232ddcd8 | 96 | bd->pdu.bd_ssn = WCN36XX_TXBD_SSN_FILL_DPU_QOS; |
8e84c258 EK |
97 | } |
98 | ||
99 | static inline struct wcn36xx_vif *get_vif_by_addr(struct wcn36xx *wcn, | |
100 | u8 *addr) | |
101 | { | |
102 | struct wcn36xx_vif *vif_priv = NULL; | |
103 | struct ieee80211_vif *vif = NULL; | |
104 | list_for_each_entry(vif_priv, &wcn->vif_list, list) { | |
105 | vif = container_of((void *)vif_priv, | |
106 | struct ieee80211_vif, | |
107 | drv_priv); | |
108 | if (memcmp(vif->addr, addr, ETH_ALEN) == 0) | |
109 | return vif_priv; | |
110 | } | |
111 | wcn36xx_warn("vif %pM not found\n", addr); | |
112 | return NULL; | |
113 | } | |
e26dc173 BC |
114 | |
115 | static void wcn36xx_tx_start_ampdu(struct wcn36xx *wcn, | |
116 | struct wcn36xx_sta *sta_priv, | |
117 | struct sk_buff *skb) | |
118 | { | |
119 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
120 | struct ieee80211_sta *sta; | |
121 | u8 *qc, tid; | |
122 | ||
123 | if (!conf_is_ht(&wcn->hw->conf)) | |
124 | return; | |
125 | ||
126 | sta = wcn36xx_priv_to_sta(sta_priv); | |
127 | ||
128 | if (WARN_ON(!ieee80211_is_data_qos(hdr->frame_control))) | |
129 | return; | |
130 | ||
131 | if (skb_get_queue_mapping(skb) == IEEE80211_AC_VO) | |
132 | return; | |
133 | ||
134 | qc = ieee80211_get_qos_ctl(hdr); | |
135 | tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; | |
136 | ||
137 | spin_lock(&sta_priv->ampdu_lock); | |
138 | if (sta_priv->ampdu_state[tid] != WCN36XX_AMPDU_NONE) | |
139 | goto out_unlock; | |
140 | ||
141 | if (sta_priv->non_agg_frame_ct++ >= WCN36XX_AMPDU_START_THRESH) { | |
142 | sta_priv->ampdu_state[tid] = WCN36XX_AMPDU_START; | |
143 | sta_priv->non_agg_frame_ct = 0; | |
144 | ieee80211_start_tx_ba_session(sta, tid, 0); | |
145 | } | |
146 | out_unlock: | |
147 | spin_unlock(&sta_priv->ampdu_lock); | |
148 | } | |
149 | ||
8e84c258 EK |
150 | static void wcn36xx_set_tx_data(struct wcn36xx_tx_bd *bd, |
151 | struct wcn36xx *wcn, | |
152 | struct wcn36xx_vif **vif_priv, | |
153 | struct wcn36xx_sta *sta_priv, | |
5f3f9285 | 154 | struct sk_buff *skb, |
8e84c258 EK |
155 | bool bcast) |
156 | { | |
5f3f9285 | 157 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
8e84c258 EK |
158 | struct ieee80211_vif *vif = NULL; |
159 | struct wcn36xx_vif *__vif_priv = NULL; | |
e26dc173 BC |
160 | bool is_data_qos; |
161 | ||
8e84c258 EK |
162 | bd->bd_rate = WCN36XX_BD_RATE_DATA; |
163 | ||
164 | /* | |
165 | * For not unicast frames mac80211 will not set sta pointer so use | |
166 | * self_sta_index instead. | |
167 | */ | |
168 | if (sta_priv) { | |
169 | __vif_priv = sta_priv->vif; | |
170 | vif = container_of((void *)__vif_priv, | |
171 | struct ieee80211_vif, | |
172 | drv_priv); | |
173 | ||
82cad2a0 | 174 | bd->dpu_sign = sta_priv->ucast_dpu_sign; |
8e84c258 EK |
175 | if (vif->type == NL80211_IFTYPE_STATION) { |
176 | bd->sta_index = sta_priv->bss_sta_index; | |
177 | bd->dpu_desc_idx = sta_priv->bss_dpu_desc_index; | |
178 | } else if (vif->type == NL80211_IFTYPE_AP || | |
179 | vif->type == NL80211_IFTYPE_ADHOC || | |
180 | vif->type == NL80211_IFTYPE_MESH_POINT) { | |
181 | bd->sta_index = sta_priv->sta_index; | |
182 | bd->dpu_desc_idx = sta_priv->dpu_desc_index; | |
183 | } | |
184 | } else { | |
185 | __vif_priv = get_vif_by_addr(wcn, hdr->addr2); | |
186 | bd->sta_index = __vif_priv->self_sta_index; | |
187 | bd->dpu_desc_idx = __vif_priv->self_dpu_desc_index; | |
82cad2a0 | 188 | bd->dpu_sign = __vif_priv->self_ucast_dpu_sign; |
8e84c258 EK |
189 | } |
190 | ||
8e84c258 EK |
191 | if (ieee80211_is_nullfunc(hdr->frame_control) || |
192 | (sta_priv && !sta_priv->is_data_encrypted)) | |
193 | bd->dpu_ne = 1; | |
194 | ||
195 | if (bcast) { | |
196 | bd->ub = 1; | |
197 | bd->ack_policy = 1; | |
198 | } | |
199 | *vif_priv = __vif_priv; | |
5f3f9285 | 200 | |
e26dc173 BC |
201 | is_data_qos = ieee80211_is_data_qos(hdr->frame_control); |
202 | ||
5f3f9285 | 203 | wcn36xx_set_tx_pdu(bd, |
e26dc173 | 204 | is_data_qos ? |
5f3f9285 BC |
205 | sizeof(struct ieee80211_qos_hdr) : |
206 | sizeof(struct ieee80211_hdr_3addr), | |
207 | skb->len, sta_priv ? sta_priv->tid : 0); | |
e26dc173 BC |
208 | |
209 | if (sta_priv && is_data_qos) | |
210 | wcn36xx_tx_start_ampdu(wcn, sta_priv, skb); | |
8e84c258 EK |
211 | } |
212 | ||
213 | static void wcn36xx_set_tx_mgmt(struct wcn36xx_tx_bd *bd, | |
214 | struct wcn36xx *wcn, | |
215 | struct wcn36xx_vif **vif_priv, | |
5f3f9285 | 216 | struct sk_buff *skb, |
8e84c258 EK |
217 | bool bcast) |
218 | { | |
5f3f9285 | 219 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
8e84c258 EK |
220 | struct wcn36xx_vif *__vif_priv = |
221 | get_vif_by_addr(wcn, hdr->addr2); | |
222 | bd->sta_index = __vif_priv->self_sta_index; | |
223 | bd->dpu_desc_idx = __vif_priv->self_dpu_desc_index; | |
224 | bd->dpu_ne = 1; | |
225 | ||
226 | /* default rate for unicast */ | |
227 | if (ieee80211_is_mgmt(hdr->frame_control)) | |
57fbcce3 | 228 | bd->bd_rate = (WCN36XX_BAND(wcn) == NL80211_BAND_5GHZ) ? |
8e84c258 EK |
229 | WCN36XX_BD_RATE_CTRL : |
230 | WCN36XX_BD_RATE_MGMT; | |
231 | else if (ieee80211_is_ctl(hdr->frame_control)) | |
232 | bd->bd_rate = WCN36XX_BD_RATE_CTRL; | |
233 | else | |
234 | wcn36xx_warn("frame control type unknown\n"); | |
235 | ||
236 | /* | |
237 | * In joining state trick hardware that probe is sent as | |
238 | * unicast even if address is broadcast. | |
239 | */ | |
240 | if (__vif_priv->is_joining && | |
241 | ieee80211_is_probe_req(hdr->frame_control)) | |
242 | bcast = false; | |
243 | ||
244 | if (bcast) { | |
245 | /* broadcast */ | |
246 | bd->ub = 1; | |
247 | /* No ack needed not unicast */ | |
248 | bd->ack_policy = 1; | |
249 | bd->queue_id = WCN36XX_TX_B_WQ_ID; | |
250 | } else | |
251 | bd->queue_id = WCN36XX_TX_U_WQ_ID; | |
252 | *vif_priv = __vif_priv; | |
5f3f9285 BC |
253 | |
254 | wcn36xx_set_tx_pdu(bd, | |
255 | ieee80211_is_data_qos(hdr->frame_control) ? | |
256 | sizeof(struct ieee80211_qos_hdr) : | |
257 | sizeof(struct ieee80211_hdr_3addr), | |
258 | skb->len, WCN36XX_TID); | |
8e84c258 EK |
259 | } |
260 | ||
261 | int wcn36xx_start_tx(struct wcn36xx *wcn, | |
262 | struct wcn36xx_sta *sta_priv, | |
263 | struct sk_buff *skb) | |
264 | { | |
265 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
266 | struct wcn36xx_vif *vif_priv = NULL; | |
267 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
268 | unsigned long flags; | |
269 | bool is_low = ieee80211_is_data(hdr->frame_control); | |
270 | bool bcast = is_broadcast_ether_addr(hdr->addr1) || | |
271 | is_multicast_ether_addr(hdr->addr1); | |
272 | struct wcn36xx_tx_bd *bd = wcn36xx_dxe_get_next_bd(wcn, is_low); | |
273 | ||
274 | if (!bd) { | |
275 | /* | |
276 | * TX DXE are used in pairs. One for the BD and one for the | |
277 | * actual frame. The BD DXE's has a preallocated buffer while | |
278 | * the skb ones does not. If this isn't true something is really | |
279 | * wierd. TODO: Recover from this situation | |
280 | */ | |
281 | ||
282 | wcn36xx_err("bd address may not be NULL for BD DXE\n"); | |
283 | return -EINVAL; | |
284 | } | |
285 | ||
286 | memset(bd, 0, sizeof(*bd)); | |
287 | ||
288 | wcn36xx_dbg(WCN36XX_DBG_TX, | |
289 | "tx skb %p len %d fc %04x sn %d %s %s\n", | |
290 | skb, skb->len, __le16_to_cpu(hdr->frame_control), | |
291 | IEEE80211_SEQ_TO_SN(__le16_to_cpu(hdr->seq_ctrl)), | |
292 | is_low ? "low" : "high", bcast ? "bcast" : "ucast"); | |
293 | ||
294 | wcn36xx_dbg_dump(WCN36XX_DBG_TX_DUMP, "", skb->data, skb->len); | |
295 | ||
296 | bd->dpu_rf = WCN36XX_BMU_WQ_TX; | |
297 | ||
f786a6d4 | 298 | bd->tx_comp = !!(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS); |
8e84c258 EK |
299 | if (bd->tx_comp) { |
300 | wcn36xx_dbg(WCN36XX_DBG_DXE, "TX_ACK status requested\n"); | |
301 | spin_lock_irqsave(&wcn->dxe_lock, flags); | |
302 | if (wcn->tx_ack_skb) { | |
303 | spin_unlock_irqrestore(&wcn->dxe_lock, flags); | |
304 | wcn36xx_warn("tx_ack_skb already set\n"); | |
305 | return -EINVAL; | |
306 | } | |
307 | ||
308 | wcn->tx_ack_skb = skb; | |
309 | spin_unlock_irqrestore(&wcn->dxe_lock, flags); | |
310 | ||
311 | /* Only one at a time is supported by fw. Stop the TX queues | |
312 | * until the ack status gets back. | |
313 | * | |
314 | * TODO: Add watchdog in case FW does not answer | |
315 | */ | |
316 | ieee80211_stop_queues(wcn->hw); | |
317 | } | |
318 | ||
319 | /* Data frames served first*/ | |
5f3f9285 BC |
320 | if (is_low) |
321 | wcn36xx_set_tx_data(bd, wcn, &vif_priv, sta_priv, skb, bcast); | |
322 | else | |
8e84c258 | 323 | /* MGMT and CTRL frames are handeld here*/ |
5f3f9285 | 324 | wcn36xx_set_tx_mgmt(bd, wcn, &vif_priv, skb, bcast); |
8e84c258 EK |
325 | |
326 | buff_to_be((u32 *)bd, sizeof(*bd)/sizeof(u32)); | |
327 | bd->tx_bd_sign = 0xbdbdbdbd; | |
328 | ||
329 | return wcn36xx_dxe_tx_frame(wcn, vif_priv, skb, is_low); | |
330 | } |