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path: root/drivers/net/wireless/ath/wcn36xx/txrx.c
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Diffstat (limited to 'drivers/net/wireless/ath/wcn36xx/txrx.c')
-rw-r--r--drivers/net/wireless/ath/wcn36xx/txrx.c284
1 files changed, 284 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/wcn36xx/txrx.c b/drivers/net/wireless/ath/wcn36xx/txrx.c
new file mode 100644
index 000000000000..b2b60e30caaf
--- /dev/null
+++ b/drivers/net/wireless/ath/wcn36xx/txrx.c
@@ -0,0 +1,284 @@
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
21static inline int get_rssi0(struct wcn36xx_rx_bd *bd)
22{
23 return 100 - ((bd->phy_stat0 >> 24) & 0xff);
24}
25
26int 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
60 wcn36xx_dbg(WCN36XX_DBG_RX, "status.flags=%x status->vendor_radiotap_len=%x\n",
61 status.flag, status.vendor_radiotap_len);
62
63 memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
64
65 hdr = (struct ieee80211_hdr *) skb->data;
66 fc = __le16_to_cpu(hdr->frame_control);
67 sn = IEEE80211_SEQ_TO_SN(__le16_to_cpu(hdr->seq_ctrl));
68
69 if (ieee80211_is_beacon(hdr->frame_control)) {
70 wcn36xx_dbg(WCN36XX_DBG_BEACON, "beacon skb %p len %d fc %04x sn %d\n",
71 skb, skb->len, fc, sn);
72 wcn36xx_dbg_dump(WCN36XX_DBG_BEACON_DUMP, "SKB <<< ",
73 (char *)skb->data, skb->len);
74 } else {
75 wcn36xx_dbg(WCN36XX_DBG_RX, "rx skb %p len %d fc %04x sn %d\n",
76 skb, skb->len, fc, sn);
77 wcn36xx_dbg_dump(WCN36XX_DBG_RX_DUMP, "SKB <<< ",
78 (char *)skb->data, skb->len);
79 }
80
81 ieee80211_rx_irqsafe(wcn->hw, skb);
82
83 return 0;
84}
85
86static void wcn36xx_set_tx_pdu(struct wcn36xx_tx_bd *bd,
87 u32 mpdu_header_len,
88 u32 len,
89 u16 tid)
90{
91 bd->pdu.mpdu_header_len = mpdu_header_len;
92 bd->pdu.mpdu_header_off = sizeof(*bd);
93 bd->pdu.mpdu_data_off = bd->pdu.mpdu_header_len +
94 bd->pdu.mpdu_header_off;
95 bd->pdu.mpdu_len = len;
96 bd->pdu.tid = tid;
97}
98
99static 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}
114static void wcn36xx_set_tx_data(struct wcn36xx_tx_bd *bd,
115 struct wcn36xx *wcn,
116 struct wcn36xx_vif **vif_priv,
117 struct wcn36xx_sta *sta_priv,
118 struct ieee80211_hdr *hdr,
119 bool bcast)
120{
121 struct ieee80211_vif *vif = NULL;
122 struct wcn36xx_vif *__vif_priv = NULL;
123 bd->bd_rate = WCN36XX_BD_RATE_DATA;
124
125 /*
126 * For not unicast frames mac80211 will not set sta pointer so use
127 * self_sta_index instead.
128 */
129 if (sta_priv) {
130 __vif_priv = sta_priv->vif;
131 vif = container_of((void *)__vif_priv,
132 struct ieee80211_vif,
133 drv_priv);
134
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;
143 }
144 } else {
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 }
149
150 bd->dpu_sign = __vif_priv->ucast_dpu_signature;
151
152 if (ieee80211_is_nullfunc(hdr->frame_control) ||
153 (sta_priv && !sta_priv->is_data_encrypted))
154 bd->dpu_ne = 1;
155
156 if (bcast) {
157 bd->ub = 1;
158 bd->ack_policy = 1;
159 }
160 *vif_priv = __vif_priv;
161}
162
163static void wcn36xx_set_tx_mgmt(struct wcn36xx_tx_bd *bd,
164 struct wcn36xx *wcn,
165 struct wcn36xx_vif **vif_priv,
166 struct ieee80211_hdr *hdr,
167 bool bcast)
168{
169 struct wcn36xx_vif *__vif_priv =
170 get_vif_by_addr(wcn, hdr->addr2);
171 bd->sta_index = __vif_priv->self_sta_index;
172 bd->dpu_desc_idx = __vif_priv->self_dpu_desc_index;
173 bd->dpu_ne = 1;
174
175 /* default rate for unicast */
176 if (ieee80211_is_mgmt(hdr->frame_control))
177 bd->bd_rate = (WCN36XX_BAND(wcn) == IEEE80211_BAND_5GHZ) ?
178 WCN36XX_BD_RATE_CTRL :
179 WCN36XX_BD_RATE_MGMT;
180 else if (ieee80211_is_ctl(hdr->frame_control))
181 bd->bd_rate = WCN36XX_BD_RATE_CTRL;
182 else
183 wcn36xx_warn("frame control type unknown\n");
184
185 /*
186 * In joining state trick hardware that probe is sent as
187 * unicast even if address is broadcast.
188 */
189 if (__vif_priv->is_joining &&
190 ieee80211_is_probe_req(hdr->frame_control))
191 bcast = false;
192
193 if (bcast) {
194 /* broadcast */
195 bd->ub = 1;
196 /* No ack needed not unicast */
197 bd->ack_policy = 1;
198 bd->queue_id = WCN36XX_TX_B_WQ_ID;
199 } else
200 bd->queue_id = WCN36XX_TX_U_WQ_ID;
201 *vif_priv = __vif_priv;
202}
203
204int wcn36xx_start_tx(struct wcn36xx *wcn,
205 struct wcn36xx_sta *sta_priv,
206 struct sk_buff *skb)
207{
208 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
209 struct wcn36xx_vif *vif_priv = NULL;
210 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
211 unsigned long flags;
212 bool is_low = ieee80211_is_data(hdr->frame_control);
213 bool bcast = is_broadcast_ether_addr(hdr->addr1) ||
214 is_multicast_ether_addr(hdr->addr1);
215 struct wcn36xx_tx_bd *bd = wcn36xx_dxe_get_next_bd(wcn, is_low);
216
217 if (!bd) {
218 /*
219 * TX DXE are used in pairs. One for the BD and one for the
220 * actual frame. The BD DXE's has a preallocated buffer while
221 * the skb ones does not. If this isn't true something is really
222 * wierd. TODO: Recover from this situation
223 */
224
225 wcn36xx_err("bd address may not be NULL for BD DXE\n");
226 return -EINVAL;
227 }
228
229 memset(bd, 0, sizeof(*bd));
230
231 wcn36xx_dbg(WCN36XX_DBG_TX,
232 "tx skb %p len %d fc %04x sn %d %s %s\n",
233 skb, skb->len, __le16_to_cpu(hdr->frame_control),
234 IEEE80211_SEQ_TO_SN(__le16_to_cpu(hdr->seq_ctrl)),
235 is_low ? "low" : "high", bcast ? "bcast" : "ucast");
236
237 wcn36xx_dbg_dump(WCN36XX_DBG_TX_DUMP, "", skb->data, skb->len);
238
239 bd->dpu_rf = WCN36XX_BMU_WQ_TX;
240
241 bd->tx_comp = info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS;
242 if (bd->tx_comp) {
243 wcn36xx_dbg(WCN36XX_DBG_DXE, "TX_ACK status requested\n");
244 spin_lock_irqsave(&wcn->dxe_lock, flags);
245 if (wcn->tx_ack_skb) {
246 spin_unlock_irqrestore(&wcn->dxe_lock, flags);
247 wcn36xx_warn("tx_ack_skb already set\n");
248 return -EINVAL;
249 }
250
251 wcn->tx_ack_skb = skb;
252 spin_unlock_irqrestore(&wcn->dxe_lock, flags);
253
254 /* Only one at a time is supported by fw. Stop the TX queues
255 * until the ack status gets back.
256 *
257 * TODO: Add watchdog in case FW does not answer
258 */
259 ieee80211_stop_queues(wcn->hw);
260 }
261
262 /* Data frames served first*/
263 if (is_low) {
264 wcn36xx_set_tx_data(bd, wcn, &vif_priv, sta_priv, hdr, bcast);
265 wcn36xx_set_tx_pdu(bd,
266 ieee80211_is_data_qos(hdr->frame_control) ?
267 sizeof(struct ieee80211_qos_hdr) :
268 sizeof(struct ieee80211_hdr_3addr),
269 skb->len, sta_priv ? sta_priv->tid : 0);
270 } else {
271 /* MGMT and CTRL frames are handeld here*/
272 wcn36xx_set_tx_mgmt(bd, wcn, &vif_priv, hdr, bcast);
273 wcn36xx_set_tx_pdu(bd,
274 ieee80211_is_data_qos(hdr->frame_control) ?
275 sizeof(struct ieee80211_qos_hdr) :
276 sizeof(struct ieee80211_hdr_3addr),
277 skb->len, WCN36XX_TID);
278 }
279
280 buff_to_be((u32 *)bd, sizeof(*bd)/sizeof(u32));
281 bd->tx_bd_sign = 0xbdbdbdbd;
282
283 return wcn36xx_dxe_tx_frame(wcn, vif_priv, skb, is_low);
284}
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-28 23:02:35 -0500