Commit | Line | Data |
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872b345f AN |
1 | /* |
2 | * This file is part of wl18xx | |
3 | * | |
4 | * Copyright (C) 2011 Texas Instruments Inc. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * version 2 as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
18 | * 02110-1301 USA | |
19 | * | |
20 | */ | |
21 | ||
22 | #include "../wlcore/wlcore.h" | |
23 | #include "../wlcore/cmd.h" | |
24 | #include "../wlcore/debug.h" | |
25 | #include "../wlcore/acx.h" | |
26 | #include "../wlcore/tx.h" | |
27 | ||
28 | #include "wl18xx.h" | |
29 | #include "tx.h" | |
30 | ||
4d703847 AN |
31 | static |
32 | void wl18xx_get_last_tx_rate(struct wl1271 *wl, struct ieee80211_vif *vif, | |
601d6c4e | 33 | u8 band, struct ieee80211_tx_rate *rate) |
4d703847 | 34 | { |
75fb4df7 | 35 | u8 fw_rate = wl->fw_status->counters.tx_last_rate; |
4d703847 AN |
36 | |
37 | if (fw_rate > CONF_HW_RATE_INDEX_MAX) { | |
38 | wl1271_error("last Tx rate invalid: %d", fw_rate); | |
39 | rate->idx = 0; | |
40 | rate->flags = 0; | |
41 | return; | |
42 | } | |
43 | ||
44 | if (fw_rate <= CONF_HW_RATE_INDEX_54MBPS) { | |
45 | rate->idx = fw_rate; | |
57fbcce3 | 46 | if (band == NL80211_BAND_5GHZ) |
601d6c4e | 47 | rate->idx -= CONF_HW_RATE_INDEX_6MBPS; |
4d703847 AN |
48 | rate->flags = 0; |
49 | } else { | |
50 | rate->flags = IEEE80211_TX_RC_MCS; | |
51 | rate->idx = fw_rate - CONF_HW_RATE_INDEX_MCS0; | |
52 | ||
53 | /* SGI modifier is counted as a separate rate */ | |
54 | if (fw_rate >= CONF_HW_RATE_INDEX_MCS7_SGI) | |
55 | (rate->idx)--; | |
56 | if (fw_rate == CONF_HW_RATE_INDEX_MCS15_SGI) | |
57 | (rate->idx)--; | |
58 | ||
59 | /* this also covers the 40Mhz SGI case (= MCS15) */ | |
60 | if (fw_rate == CONF_HW_RATE_INDEX_MCS7_SGI || | |
61 | fw_rate == CONF_HW_RATE_INDEX_MCS15_SGI) | |
62 | rate->flags |= IEEE80211_TX_RC_SHORT_GI; | |
63 | ||
64 | if (fw_rate > CONF_HW_RATE_INDEX_MCS7_SGI && vif) { | |
65 | struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif); | |
66 | if (wlvif->channel_type == NL80211_CHAN_HT40MINUS || | |
67 | wlvif->channel_type == NL80211_CHAN_HT40PLUS) { | |
68 | /* adjustment needed for range 0-7 */ | |
69 | rate->idx -= 8; | |
70 | rate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; | |
71 | } | |
72 | } | |
73 | } | |
74 | } | |
75 | ||
872b345f AN |
76 | static void wl18xx_tx_complete_packet(struct wl1271 *wl, u8 tx_stat_byte) |
77 | { | |
78 | struct ieee80211_tx_info *info; | |
79 | struct sk_buff *skb; | |
80 | int id = tx_stat_byte & WL18XX_TX_STATUS_DESC_ID_MASK; | |
81 | bool tx_success; | |
82 | ||
83 | /* check for id legality */ | |
84 | if (unlikely(id >= wl->num_tx_desc || wl->tx_frames[id] == NULL)) { | |
85 | wl1271_warning("illegal id in tx completion: %d", id); | |
86 | return; | |
87 | } | |
88 | ||
89 | /* a zero bit indicates Tx success */ | |
90 | tx_success = !(tx_stat_byte & BIT(WL18XX_TX_STATUS_STAT_BIT_IDX)); | |
91 | ||
872b345f AN |
92 | skb = wl->tx_frames[id]; |
93 | info = IEEE80211_SKB_CB(skb); | |
94 | ||
95 | if (wl12xx_is_dummy_packet(wl, skb)) { | |
96 | wl1271_free_tx_id(wl, id); | |
97 | return; | |
98 | } | |
99 | ||
100 | /* update the TX status info */ | |
101 | if (tx_success && !(info->flags & IEEE80211_TX_CTL_NO_ACK)) | |
102 | info->flags |= IEEE80211_TX_STAT_ACK; | |
4d703847 AN |
103 | /* |
104 | * first pass info->control.vif while it's valid, and then fill out | |
105 | * the info->status structures | |
106 | */ | |
601d6c4e EP |
107 | wl18xx_get_last_tx_rate(wl, info->control.vif, |
108 | info->band, &info->status.rates[0]); | |
872b345f | 109 | |
4d703847 | 110 | info->status.rates[0].count = 1; /* no data about retries */ |
872b345f AN |
111 | info->status.ack_signal = -1; |
112 | ||
113 | if (!tx_success) | |
114 | wl->stats.retry_count++; | |
115 | ||
116 | /* | |
117 | * TODO: update sequence number for encryption? seems to be | |
118 | * unsupported for now. needed for recovery with encryption. | |
119 | */ | |
120 | ||
121 | /* remove private header from packet */ | |
122 | skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); | |
123 | ||
124 | /* remove TKIP header space if present */ | |
2c0133a4 AN |
125 | if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) && |
126 | info->control.hw_key && | |
872b345f AN |
127 | info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) { |
128 | int hdrlen = ieee80211_get_hdrlen_from_skb(skb); | |
129 | memmove(skb->data + WL1271_EXTRA_SPACE_TKIP, skb->data, hdrlen); | |
130 | skb_pull(skb, WL1271_EXTRA_SPACE_TKIP); | |
131 | } | |
132 | ||
133 | wl1271_debug(DEBUG_TX, "tx status id %u skb 0x%p success %d", | |
134 | id, skb, tx_success); | |
135 | ||
136 | /* return the packet to the stack */ | |
137 | skb_queue_tail(&wl->deferred_tx_queue, skb); | |
138 | queue_work(wl->freezable_wq, &wl->netstack_work); | |
139 | wl1271_free_tx_id(wl, id); | |
140 | } | |
141 | ||
142 | void wl18xx_tx_immediate_complete(struct wl1271 *wl) | |
143 | { | |
144 | struct wl18xx_fw_status_priv *status_priv = | |
75fb4df7 | 145 | (struct wl18xx_fw_status_priv *)wl->fw_status->priv; |
872b345f AN |
146 | struct wl18xx_priv *priv = wl->priv; |
147 | u8 i; | |
148 | ||
149 | /* nothing to do here */ | |
150 | if (priv->last_fw_rls_idx == status_priv->fw_release_idx) | |
151 | return; | |
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 | 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 | } |