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d7c43082 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
5449c685 FB |
2 | /* |
3 | * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc. | |
4 | * All rights reserved. | |
5 | * | |
5449c685 FB |
6 | * File: dpc.c |
7 | * | |
8 | * Purpose: handle dpc rx functions | |
9 | * | |
10 | * Author: Lyndon Chen | |
11 | * | |
12 | * Date: May 20, 2003 | |
13 | * | |
14 | * Functions: | |
5449c685 FB |
15 | * |
16 | * Revision History: | |
17 | * | |
18 | */ | |
19 | ||
5449c685 | 20 | #include "device.h" |
5449c685 | 21 | #include "baseband.h" |
5449c685 | 22 | #include "rf.h" |
04d52197 | 23 | #include "dpc.h" |
5449c685 | 24 | |
33b1c8c1 MP |
25 | static bool vnt_rx_data(struct vnt_private *priv, struct sk_buff *skb, |
26 | u16 bytes_received) | |
27 | { | |
28 | struct ieee80211_hw *hw = priv->hw; | |
29 | struct ieee80211_supported_band *sband; | |
30 | struct ieee80211_rx_status rx_status = { 0 }; | |
31 | struct ieee80211_hdr *hdr; | |
32 | __le16 fc; | |
33 | u8 *rsr, *new_rsr, *rssi; | |
34 | __le64 *tsf_time; | |
35 | u16 frame_size; | |
36 | int ii, r; | |
d6ff1b52 | 37 | u8 *rx_rate; |
33b1c8c1 MP |
38 | u8 *skb_data; |
39 | u8 rate_idx = 0; | |
40 | u8 rate[MAX_RATE] = {2, 4, 11, 22, 12, 18, 24, 36, 48, 72, 96, 108}; | |
41 | long rx_dbm; | |
42 | ||
43 | /* [31:16]RcvByteCount ( not include 4-byte Status ) */ | |
44 | frame_size = le16_to_cpu(*((__le16 *)(skb->data + 2))); | |
45 | if (frame_size > 2346 || frame_size < 14) { | |
46 | dev_dbg(&priv->pcid->dev, "------- WRONG Length 1\n"); | |
47 | return false; | |
48 | } | |
49 | ||
50 | skb_data = (u8 *)skb->data; | |
51 | ||
33b1c8c1 MP |
52 | rx_rate = skb_data + 1; |
53 | ||
54 | sband = hw->wiphy->bands[hw->conf.chandef.chan->band]; | |
55 | ||
56 | for (r = RATE_1M; r < MAX_RATE; r++) { | |
57 | if (*rx_rate == rate[r]) | |
58 | break; | |
59 | } | |
60 | ||
61 | priv->rx_rate = r; | |
62 | ||
63 | for (ii = 0; ii < sband->n_bitrates; ii++) { | |
64 | if (sband->bitrates[ii].hw_value == r) { | |
65 | rate_idx = ii; | |
66 | break; | |
67 | } | |
68 | } | |
69 | ||
70 | if (ii == sband->n_bitrates) { | |
71 | dev_dbg(&priv->pcid->dev, "Wrong RxRate %x\n", *rx_rate); | |
72 | return false; | |
73 | } | |
74 | ||
75 | tsf_time = (__le64 *)(skb_data + bytes_received - 12); | |
33b1c8c1 MP |
76 | new_rsr = skb_data + bytes_received - 3; |
77 | rssi = skb_data + bytes_received - 2; | |
78 | rsr = skb_data + bytes_received - 1; | |
6d854127 MP |
79 | if (*rsr & (RSR_IVLDTYP | RSR_IVLDLEN)) |
80 | return false; | |
33b1c8c1 MP |
81 | |
82 | RFvRSSITodBm(priv, *rssi, &rx_dbm); | |
83 | ||
84 | priv->byBBPreEDRSSI = (u8)rx_dbm + 1; | |
f218f40d | 85 | priv->uCurrRSSI = *rssi; |
33b1c8c1 MP |
86 | |
87 | skb_pull(skb, 4); | |
88 | skb_trim(skb, frame_size); | |
89 | ||
90 | rx_status.mactime = le64_to_cpu(*tsf_time); | |
91 | rx_status.band = hw->conf.chandef.chan->band; | |
92 | rx_status.signal = rx_dbm; | |
93 | rx_status.flag = 0; | |
94 | rx_status.freq = hw->conf.chandef.chan->center_freq; | |
95 | ||
6d854127 MP |
96 | if (!(*rsr & RSR_CRCOK)) |
97 | rx_status.flag |= RX_FLAG_FAILED_FCS_CRC; | |
98 | ||
33b1c8c1 MP |
99 | hdr = (struct ieee80211_hdr *)(skb->data); |
100 | fc = hdr->frame_control; | |
101 | ||
102 | rx_status.rate_idx = rate_idx; | |
103 | ||
104 | if (ieee80211_has_protected(fc)) { | |
105 | if (priv->byLocalID > REV_ID_VT3253_A1) | |
6d854127 MP |
106 | rx_status.flag |= RX_FLAG_DECRYPTED; |
107 | ||
108 | /* Drop packet */ | |
109 | if (!(*new_rsr & NEWRSR_DECRYPTOK)) | |
110 | return false; | |
33b1c8c1 MP |
111 | } |
112 | ||
33b1c8c1 MP |
113 | memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status)); |
114 | ||
115 | ieee80211_rx_irqsafe(priv->hw, skb); | |
116 | ||
117 | return true; | |
118 | } | |
119 | ||
9cb693f6 | 120 | bool vnt_receive_frame(struct vnt_private *priv, struct vnt_rx_desc *curr_rd) |
33b1c8c1 | 121 | { |
88defe2b | 122 | struct vnt_rd_info *rd_info = curr_rd->rd_info; |
33b1c8c1 MP |
123 | struct sk_buff *skb; |
124 | u16 frame_size; | |
125 | ||
126 | skb = rd_info->skb; | |
127 | ||
a1c6dcda QL |
128 | dma_unmap_single(&priv->pcid->dev, rd_info->skb_dma, |
129 | priv->rx_buf_sz, DMA_FROM_DEVICE); | |
33b1c8c1 | 130 | |
9fc7091c | 131 | frame_size = le16_to_cpu(curr_rd->rd1.req_count) |
de1c1862 | 132 | - le16_to_cpu(curr_rd->rd0.res_count); |
33b1c8c1 MP |
133 | |
134 | if ((frame_size > 2364) || (frame_size < 33)) { | |
135 | /* Frame Size error drop this packet.*/ | |
136 | dev_dbg(&priv->pcid->dev, "Wrong frame size %d\n", frame_size); | |
137 | dev_kfree_skb_irq(skb); | |
138 | return true; | |
139 | } | |
140 | ||
141 | if (vnt_rx_data(priv, skb, frame_size)) | |
142 | return true; | |
143 | ||
144 | dev_kfree_skb_irq(skb); | |
145 | ||
146 | return true; | |
147 | } |