1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * This file is part of wl18xx
4 *
5 * Copyright (C) 2011 Texas Instruments Inc.
6 */
7
8#include "../wlcore/wlcore.h"
9#include "../wlcore/cmd.h"
10#include "../wlcore/debug.h"
11#include "../wlcore/acx.h"
12#include "../wlcore/tx.h"
13
14#include "wl18xx.h"
15#include "tx.h"
16
17static
18void wl18xx_get_last_tx_rate(struct wl1271 *wl, struct ieee80211_vif *vif,
19 u8 band, struct ieee80211_tx_rate *rate, u8 hlid)
20{
21 u8 fw_rate = wl->links[hlid].fw_rate_idx;
22
23 if (fw_rate > CONF_HW_RATE_INDEX_MAX) {
24 wl1271_error("last Tx rate invalid: %d", fw_rate);
25 rate->idx = 0;
26 rate->flags = 0;
27 return;
28 }
29
30 if (fw_rate <= CONF_HW_RATE_INDEX_54MBPS) {
31 rate->idx = fw_rate;
32 if (band == NL80211_BAND_5GHZ)
33 rate->idx -= CONF_HW_RATE_INDEX_6MBPS;
34 rate->flags = 0;
35 } else {
36 rate->flags = IEEE80211_TX_RC_MCS;
37 rate->idx = fw_rate - CONF_HW_RATE_INDEX_MCS0;
38
39 /* SGI modifier is counted as a separate rate */
40 if (fw_rate >= CONF_HW_RATE_INDEX_MCS7_SGI)
41 (rate->idx)--;
42 if (fw_rate == CONF_HW_RATE_INDEX_MCS15_SGI)
43 (rate->idx)--;
44
45 /* this also covers the 40Mhz SGI case (= MCS15) */
46 if (fw_rate == CONF_HW_RATE_INDEX_MCS7_SGI ||
47 fw_rate == CONF_HW_RATE_INDEX_MCS15_SGI)
48 rate->flags |= IEEE80211_TX_RC_SHORT_GI;
49
50 if (fw_rate > CONF_HW_RATE_INDEX_MCS7_SGI && vif) {
51 struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif);
52 if (wlvif->channel_type == NL80211_CHAN_HT40MINUS ||
53 wlvif->channel_type == NL80211_CHAN_HT40PLUS) {
54 /* adjustment needed for range 0-7 */
55 rate->idx -= 8;
56 rate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
57 }
58 }
59 }
60}
61
62static void wl18xx_tx_complete_packet(struct wl1271 *wl, u8 tx_stat_byte)
63{
64 struct ieee80211_tx_info *info;
65 struct sk_buff *skb;
66 int id = tx_stat_byte & WL18XX_TX_STATUS_DESC_ID_MASK;
67 bool tx_success;
68 struct wl1271_tx_hw_descr *tx_desc;
69
70 /* check for id legality */
71 if (unlikely(id >= wl->num_tx_desc || wl->tx_frames[id] == NULL)) {
72 wl1271_warning("illegal id in tx completion: %d", id);
73 return;
74 }
75
76 /* a zero bit indicates Tx success */
77 tx_success = !(tx_stat_byte & BIT(WL18XX_TX_STATUS_STAT_BIT_IDX));
78
79 skb = wl->tx_frames[id];
80 info = IEEE80211_SKB_CB(skb);
81 tx_desc = (struct wl1271_tx_hw_descr *)skb->data;
82
83 if (wl12xx_is_dummy_packet(wl, skb)) {
84 wl1271_free_tx_id(wl, id);
85 return;
86 }
87
88 /* update the TX status info */
89 if (tx_success && !(info->flags & IEEE80211_TX_CTL_NO_ACK))
90 info->flags |= IEEE80211_TX_STAT_ACK;
91 /*
92 * first pass info->control.vif while it's valid, and then fill out
93 * the info->status structures
94 */
95 wl18xx_get_last_tx_rate(wl, vif: info->control.vif,
96 band: info->band,
97 rate: &info->status.rates[0],
98 hlid: tx_desc->hlid);
99
100 info->status.rates[0].count = 1; /* no data about retries */
101 info->status.ack_signal = -1;
102
103 if (!tx_success)
104 wl->stats.retry_count++;
105
106 /*
107 * TODO: update sequence number for encryption? seems to be
108 * unsupported for now. needed for recovery with encryption.
109 */
110
111 /* remove private header from packet */
112 skb_pull(skb, len: sizeof(struct wl1271_tx_hw_descr));
113
114 /* remove TKIP header space if present */
115 if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) &&
116 info->control.hw_key &&
117 info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) {
118 int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
119 memmove(skb->data + WL1271_EXTRA_SPACE_TKIP, skb->data, hdrlen);
120 skb_pull(skb, WL1271_EXTRA_SPACE_TKIP);
121 }
122
123 wl1271_debug(DEBUG_TX, "tx status id %u skb 0x%p success %d",
124 id, skb, tx_success);
125
126 /* return the packet to the stack */
127 skb_queue_tail(list: &wl->deferred_tx_queue, newsk: skb);
128 queue_work(wq: wl->freezable_wq, work: &wl->netstack_work);
129 wl1271_free_tx_id(wl, id);
130}
131
132void wl18xx_tx_immediate_complete(struct wl1271 *wl)
133{
134 struct wl18xx_fw_status_priv *status_priv =
135 (struct wl18xx_fw_status_priv *)wl->fw_status->priv;
136 struct wl18xx_priv *priv = wl->priv;
137 u8 i, hlid;
138
139 /* nothing to do here */
140 if (priv->last_fw_rls_idx == status_priv->fw_release_idx)
141 return;
142
143 /* update rates per link */
144 hlid = wl->fw_status->counters.hlid;
145
146 if (hlid < WLCORE_MAX_LINKS) {
147 wl->links[hlid].fw_rate_idx =
148 wl->fw_status->counters.tx_last_rate;
149 wl->links[hlid].fw_rate_mbps =
150 wl->fw_status->counters.tx_last_rate_mbps;
151 }
152
153 /* freed Tx descriptors */
154 wl1271_debug(DEBUG_TX, "last released desc = %d, current idx = %d",
155 priv->last_fw_rls_idx, status_priv->fw_release_idx);
156
157 if (status_priv->fw_release_idx >= WL18XX_FW_MAX_TX_STATUS_DESC) {
158 wl1271_error("invalid desc release index %d",
159 status_priv->fw_release_idx);
160 WARN_ON(1);
161 return;
162 }
163
164 for (i = priv->last_fw_rls_idx;
165 i != status_priv->fw_release_idx;
166 i = (i + 1) % WL18XX_FW_MAX_TX_STATUS_DESC) {
167 wl18xx_tx_complete_packet(wl,
168 tx_stat_byte: status_priv->released_tx_desc[i]);
169
170 wl->tx_results_count++;
171 }
172
173 priv->last_fw_rls_idx = status_priv->fw_release_idx;
174}
175

source code of linux/drivers/net/wireless/ti/wl18xx/tx.c